Home
Top AuthorsTop ArticlesArticles WritingSubmit ArticlesRSSFQA 
 
Hobbies
Board games
Card games
Digital photography
Hobbies
Photography
Video games

 
 
 

Dpi and Why - Resolution Does Matter


Publisher: Tedric Garrison
Date: 2008-05-04
Ranking Click at the star to rank
Ranking Level
0
No. ranking 0
 
Sponsored Links
Tedric Garrison

When I started on the internet I was a photographer and a science fiction fan. Since I had no science fiction photos of my own, I started surfing the web. After several months of looking through many Sci-Fi web sites, I realized that most of those sites used small thumb nail size prints (usually 1 inch x 1 ¼ inch or smaller). This was back in the days that a 28.8 modem
was considered high speed.

The reason these thumb nails were so small was that it took so much time for the pictures to come up on the page. When you clicked on an individual thumb nail; a larger version of the picture came up (usually 4x6 or bigger), but it would take a very long time to do so.

Searching all the big images I could find; I saved the ones I liked, and brought them into Photoshop where I could compress them. I made my own site with images that measured a whopping 2 inch x 2 ½ inches, which was better than the small thumb nails I saw every where else. I quickly found that over 90% of their images were saved at 72dpi; so that’s what I did. For several years, I saved all my photos at 2 inch x 2 ½ inches and at 72dpi.

As my interest in photography continued to grow; I realized that a Sci-Fi web site might be cool but it made me no money. I needed to put up a web site of my own photos. By now I was using a 56k modem and decided my pictures needed to be bigger. When I scanned in my pictures I usually did them at 100% at 72dpi; so that all my images on line where now 4x6 in size.

After a few years my lab started offering pictures on CD. They were also 72dpi so I didn’t have to scan them in anymore. Life was good; but they used file sizes like 44 inches x 56 inches which at the time I really couldn’t figure out. I didn’t know anyone who ever printed something that big; so again I took those images and compressed them back down to 4x6 inch size.

Eventually, I started doing the same thing but saving them as 5x7 inch size. My new site (betterphototips.com) looked impressive and actually loaded very quickly. Yes, I also eventually stepped up to real high speed (1.5mbs per sec.) Life was good again; until I went back and started pursuing one of my other great loves (writing). I figured rather than just using this site as a gigantic portfolio; why didn’t I offer something for sale as well. You know the old adage “write about what you know best”? To me it made perfect sense that I should start writing about photography “how to” tips. That’s when things started to get complicated.

When I looking around at self publishing and print on demand publishing, I found that they all wanted pictures to be 300dpi or greater. This was a total shock to me. I had thousands of images ready to use, but they were all saved at 72dpi. I thought that Photoshop could save me again, so I started converting them to 300dpi but something didn’t look right. My 300dpi images looked worse than my 72dpi images. I was at a loss. Then I went back and did my research.

The reason the images on a CD from the lab are so huge (in measurement) is so you can use the images in either format. 72dpi is exactly 25% of 300dpi. If you want your 300dpi images to look as razor sharp as your 72dpi images do on line, the print has to be 75% smaller. In other words, an image that measures 44 inch x 56 inch at 72dpi would be the same quality as an image that measures 11 inch x 14 inch at 300dpi.

If you take an image that was originally 5x7 inches at 72dpi and try to convert it directly to 300dpi, it is not a pretty picture. Similar to the equivalent of the right f-stop and the right shutter speed, you have to take both factors into account! DPI and Size are forever tied together. You can not change one without affecting the other. It is much easier to make something smaller that looks good, than to try to enlarge something after the fact and try to make it look even close to the original. That being said, the best photo tip I can give new beginners today is: ALWAYS save your images larger than you expect to use. Do not waste 15 years of your life and thousands upon thousands of images that can only be used in one way. Always save large!!


 

Dpi and Why - Resolution Does Matter Keywords:

Photo      Internet      Photography      Photo Tips      Resolution      Image Quality      Dpi      Dots Per Inch      Image Size      Dpi and Why - Resolution Does Matter      Photography      Hobbies     

 
     
 
 

Related Article:Dpi and Why - Resolution Does Matter

Collapse All
 

The Only New Year''s Resolution You Need!

Kimberly Chastain 2008-04-16
Title: The Only New Year''s Resolution You Need!
I am going to make a bold statement. I think I have the only New Year’s Resolution you need. You have got to be kidding, right??!!! You don’t know me, Kimberly. You don’t know that I need to lose 20lbs., exercise, be a better mother, be a better worker, a better wife, etc. How in the world can you boil it down to one New Year’s Resolution?

We can find our one New Year’s Resolution in the Bible. Listen to this verse, “Whether, then, you eat or drink or whatever you do, do all to the glory of God.” 1 Corinthians 10:31. What do you think? Can we sum up all the many roles in our lives and state without reservation that we are doing them to the glory of God? I have to admit I do not do everything to the glory of God, but that certainly is a goal to try and attain. When you look at your New Year’s Resolutions how do they look differently in light of this verse? Do I eat to the glory of God? Do I parent my children to point them to God and reflect His glory? Do my co-workers know there is something different about me, because I reflect God’s glory?

One thing I have learned recently is to have an eternal perspective. When we think about eternity, sometimes the big things we have been so stressed over no longer seem so major. Will it matter in eternity whether my house was spotless and my bed was made every day? Sounds kind of trivial, doesn’t it? What will matter is if my children spend eternity with me in heaven. What will also matter is if I’m showing them how to worship God in everything they do. When you start to get frazzled and anxious ask yourself, “Will this matter in eternity?” I don’t mean to say we don’t do a good job at work and home, but we need to keep an eternal perspective.

My challenge for you and for me this year is to “do all to the glory of God.” Can you imagine how our homes and workplaces would be radically changed if we truly lived to glorify God? I certainly think they would be more peaceful. I don’t know if you agree with my “only” New Year’s Resolution, but I pray God will be glorified through you this year.


 

6 Important Features to Consider While Selecting the Best Digital Camera!

Neelima Reddy 2008-03-28
Title: 6 Important Features to Consider While Selecting the Best Digital Camera!
There are various types of digital cameras made by different manufacturers with different features. Among all, selecting the right digital camera which is suitable for you is not a typical task if you follow these techniques. 1. Resolution 2. Optical zoom 3. Digital zoom 4. memory 5. Usability 6. Investigate

These techniques are explained as follows:

Resolution Each and every digital camera has certain resolution factor. Most advanced cameras will have high resolution where as the normal digital cameras will have low resolution.

Basically the picture resolution will be dependent on pixel rating. The resolution of the camera will vary for different cameras with different pixel count.

The cameras which have high resolution power produce larger images and the rate of these cameras will also be high. Normal and average photographer need not require these cameras with high resolution.

Most probably these high resolution cameras are preferred by professional or expert photographers. They also don’t use these cameras all the times (except for taking special pictures).

Optical zoom Optical zoom is necessary to view the object in large size. Almost all digital cameras will have this optical zoom facility. Before buying the camera, you must check the optical zoom present in it and you must not afford it if it has the optical zoom less than 2.

Digital zoom Digital zoom is used to increase the size of the picture. Most of the digital cameras offer this digital zoom facility. Check out the clarity levels of the picture clearly when you increase the size of it because some of the pictures will loose their clarity if you apply digital zoom to them.

Memory Before getting the new digital camera know how much memory is present in it. Most of the digital cameras will have less memory to store more number of snaps in it. So, better along with your digital camera get the extra memory card which has enough space to store more snaps in it.

Usability You have to select the camera depending on your usability. If you have high usage of it, go for advanced cameras which provide more techniques and high resolution or else if you have less usage of it better get the digital cameras which don’t have high resolution and more advanced techniques. So, depending upon the usage you have to select the right camera suitable for you.

Investigate After getting your new digital camera, investigate it on various aspects by knowing what are the different modes and new techniques present in it. Try to learn all the techniques regarding how to handle it properly without causing any damage to it before using your new digital camera for the first time.

Do you like to know the reason behind this? Some cameras will be damaged easily if you don’t handle them in the right way. So, to avoid this situation try to know how to handle it in the right way.

Other than these things, you should also get all the necessary accessories required for your camera when you get the new digital camera. These accessories will be helpful to you in more number of ways and they also prevent the damage of your digital camera. Visit http://www.digitalpicturezone.com> Digital Picture Zone

About The Author :-

http://www.digitalpicturezone.com>Digital Picture blog helps you learn everything you need to know about digital camera. Know more about digital camera tips and reviews, and also about digital camera accessories. Visit http://www.digitalpicturezone.com


 

New Years Resolution: Making a New YOU Year

Dave Pipitone 2008-01-04
Title: New Years Resolution: Making a New YOU Year
Do you want to really achieve that new year resolution that you made on January 1? Whether you want to lose weight, quit smoking, earn more money or achieve a personal goal, now is the time to make it happen. Here are ten easy steps that can put you on the road to success and experience a New YOU Year.

Step One - Write It Down Every New Year Resolution is a striving to improve. Put your resolution into writing.

A resolution means taking action to make a change. If you are serious, that is, if you are resolved, to keep a resolution, write down what you intend to do.

Step Two - Get Going Right Away The main reason why many people do not keep their New Year's resolutions is because they procrastinate. Keep in mind that if you break a promise to yourself, your trust level in accomplishing a goal will decrease.

If you will do something every day, or in a planned time frame, toward reaching your goal, you will succeed. So get going right now.

Step Three - Get Support Once your support is in place, it is time to take step 4, developing a detailed plan to reach your goal.

Step Four - Make a Detailed Plan Think of your resolution like a destination you want to reach. This step is all about making a detailed plan of action to achieve your goal. Knowledge is power, especially if it is practical knowledge that other successful people have used to accomplish a similar goal. Go right ahead and borrow what works from other people - it will probably work for you.

Step Five - Be Specific So You Can Measure the Outcome If your goal is to lose weight, you need to identify how much weight you want to lose.

If you don't make your resolution measurable, you will set yourself up for disappointment, because you don't have a way to tell if you've met your goal or not. If you can't score, you won't win.

Step Six - Make Your New Years Resolutions Personally Meaningful to You. If you've taken the first five steps, you have a solid base for reaching your goal. The reason you made a resolution was to make your life or someone else's life better. If you know your WHY, you can achieve WHAT you want.

Step Seven - Overcome Those Pesky Obstacles Every progress in life is married to difficulty. Think of all of the obstacles and challenges that many of the successful writers, actors, inventors, entrepreneurs have had to overcome. This means grinding it out. You can do it, if you keep going.

Step Eight - Motivate Yourself Take every effort to encourage yourself. You might use affirmations, a poster with pictures of what your goal is, or you might visualize how you feel if you have already accomplished your goal. It's your life, make it exciting.

Step Nine - Do a Checkup and Adjust Your Strategy Without doing a checkup, you may forget your goal, get distracted and give up on your New Years resolution. When you take the time to check your progress, you are telling your subconscious mind that your goal is worth your time and attention.

Step Ten - Become an Action Figure If you are not used to taking action, you are not alone. Nearly 90% of those who do not accomplish goals do nothing. So, you may feel stretched and challenged to be active and move forward if you are not used to being active.

Don't worry. You will get used to a new YOU if you stick with it.

Get your free report with the detailed information on all Steps 1 through 10 for keeping your New Years resolution and achieving the goals and dreams that you want this year.


 

How to Stick to Your New Years'' Fitness Resolution

Megan Hazel 2007-12-28
Title: How to Stick to Your New Years'' Fitness Resolution
We all know what it's like to make a New Year's Resolution with the best of intentions. We start out really positive, really motivated, really strong. No matter what the resolution, though, after about three weeks it just doesn't seem to be at the top of our priority list any longer. With fitness, maybe in the past you have promised yourself that you will meet a certain goal in a certain time this New Year, only to find yourself getting more and more discouraged as time passes and you haven't met that goal. Don't set yourself up to fail! You can create success by doing the following:

1.Map out a plan. You have heard the old adage "Those who fail to plan, plan to fail"? Nowhere is this truer than in the area of health and fitness. You simply can't decide to get in better shape or eat right without mapping out steps to follow through. If you decide to go to the gym, you need to decide what you are going to do there. Wandering around the equipment or deciding on the fly will not produce nearly the same results as having a goal and sticking to it. You may decide, for example, that you are going to commit to going to the gym five days a week. The next step here is to commit to doing specific exercises on those five days. For example, you could do 30 minutes of cardiovascular exercise on Monday, Wednesday, and Friday and weight train Tuesdays and Thursdays. You could "allow" yourself to choose the cardio machine each day to mix it up or keep it interesting, but stick to a specific plan for the days you strength train. By focusing on specific body parts on specific days, you will not only notice results in those areas in less time, you will remain motivated to keep it up. Why? Because you set a goal - doing back and biceps on Tuesday, for example, and chest and triceps on Thursday - and stuck to it! Pretty soon, your small achievements will turn into big ones.

2.Mix it up every six weeks. Once you have the routine down and you are feeling good about yourself, the last thing you want to do is fall into a rut. Many people abandon their fitness goals because they fall into the same pattern each time they exercise, and it feels more like a chore than a fun activity. If you find yourself on the same treadmill in the same row next to the same person at the gym every day, move on to the elliptical machine or the stationary bike instead. If you really enjoy the treadmill but you run the same three miles each time you're on it, try switching to one of the pre-programmed options on the treadmill, or make your own routine. For example, you could do intervals - running at a higher speed than usual for two minutes and walking for one minute in between - until your usual amount of time has elapsed. The same holds true for weight lifting. If you usually do 10-12 reps for 3 sets of a given weight, try lifting lighter weight and doing twice the number of repetitions, or heavier weight but fewer reps. Take a class that's offered, or even join a league sport or get outside for some other fitness options. You will stay fresh and energized and a lot less prone to the fitness blues.

3.Find "your" time of day. Making exercise enjoyable cannot be done if it doesn't feel like something you are doing for yourself and no one else. A big part of this pleasure comes from finding a time of the day you can carve out for "just you". This means a time of day that is generally open to you to do as you please, and that will not come with constant interruptions as the week's progress. It also means a time of day with which you are physically comfortable. If you tend to eat a really early dinner, you are likely not going to want to exercise right after work. If you are the type of person who doesn't mind eating lunch at your desk, perhaps a mid-day workout is just what you need to keep you alert and focused for the rest of your day and stay strong with your new exercise program. If you're the kind that leaps out of bed in the morning, a pre-dawn run outside may be just your ticket. Whatever works for you, do not underestimate finding a time of day that best suits your wants and the needs of yourself, work, and family.

By simply thinking ahead and incorporating these three simple ideas, you are already on your way to making life changes you can stick with, and that is the key. Good luck on your New Year and New You!

 

Choosing the Right Resolution When Scanning Images

Christine Peppler 2007-11-21
Title: Choosing the Right Resolution When Scanning Images
Scanners are great tools for converting images from prints, negatives, and slides into a digital form for the purposes of storage, editing, and sharing via the internet or to produce actual prints. The quality of the images from a scanner depends in large part upon resolution. Some scanners offer significantly higher resolution than others but most allow the user to adjust the resolution used for any given scan.

Because higher resolution means more detailed and higher quality images why would a user ever select to lower resolution? There are actually a couple of reasons why someone might decide to adjust the resolution downward when scanning.

One reason that the choice to use lower resolution would be considered is that higher resolution images contain more information. The downside of more information is that file sizes are much larger, requiring much more storage space. When storage space is limited, higher resolution images can be a drawback. Users must experiment to determine what level of quality they are willing to accept in order to preserve memory.

In addition to the increased storage needs, the larger file size of high resolution images creates a second drawback. Such images are slower to scan, manipulate, and download. A user may not wish to spend exorbitant amounts of time dealing with larger file sizes and those receiving or waiting for a web page to open that contains such files may become impatient with the process as well. Again, the user has to determine how much image quality they are willing to sacrifice to get smaller files that save time.

Determining what resolution to use when scanning can depend on a number of things: the type of material being scanned, the quality of the image, and how the resulting file will be used.

Slides and negatives require a higher resolution than a print. Because they start off quite small, they will likely be enlarged for viewing purposes. When any image is enlarged, greater resolution is needed to maintain acceptable image quality. The number of pixels or bits of image information needed for the enlarged image to be of reasonable quality may need to be 2,000 or more.

If an image being scanned is a text document less information will be needed to create a clear image and, indeed, a resolution of only 100 should be sufficient. If the image scanned is a picture that will be shared only via computer, then a resolution of 100 or so may still be quite acceptable as the resolution at which a computer screen is able to display is generally limited. However, if that same image will be printed, resolution will need to be greater; perhaps 300 to obtain an acceptable image. Just as explained when scanning slides however, if a user chooses to enlarge that same image, greater resolution will be required to maintain quality. For instance, if a 4x6 print will be scanned and enlarged to a 10x15 print, then a resolution of at least 600 would be wise.

Clearly, scanning images at the highest resolution can create optimum image quality but when speed of scanning and downloading are important or storage space is limited, users are wise to consider adjusting resolution downward in situations where acceptable image quality is possible with lower settings. Some experimentation will be required to find the level of image quality that is acceptable to an individual user.

 

Online Marketing Mindset For The New Year

Faye Brown 2007-01-09
Title: Online Marketing Mindset For The New Year
It is the start of 2007 and is the time to set your New Years resolution. I suggest that you set a personal and a business resolution. Whatever you decide you want to improve in your life whether it is to become wealthy in your online marketing business or to just be a better person, it takes a strong mindset to keep a resolution for longer than 1 day, week or month. You must believe that you are capable of reaching your goals, maybe this can be your News Years resolution to have a better mindset, and then other things in your life will also start to take shape the way you want them to.

What is the proper mindset? It is the ability to believe you are capable of conquering a set task and to truly believe that it will happen and that you deserve it. You will attract what you consistently think about and you must be aware that your thoughts are very powerful. You must take all negativity out of your life. Thinking negative or being around negative people will only cause you to fail. Find a good support team who are willing to encourage you, and if that means stepping outside of your normal support group, then do it. You may find support within your online marketing team.

You must work on your mindset daily with self-talks, reading books about the subject or listening to recorded cd’s or tapes. There are many free books and downloadable audios on the subject; all you have to do is spend a few minutes looking for the information. Your local library can also be a good source for finding quality information. Your mindset will help you to overcome the times when you are struggling at keeping your resolution.

You must visualize and internalize yourself as being the person you want to become. You must first see yourself as the person that you want others to see. When you do this over and over again it will start to become the reality you are seeking. Whether your resolution is to lose 30 pounds, quit smoking or if it's to be a create wealth at Online Marketing, you must see yourself as this person.

Remember the children’s story The Little Engine That Could that never gave up. Become the little engine in your online marketing business and get better rewards for your efforts. Everything you want is within your reach, you just have to make it come true.

 

How to Stick to your New Years'' Fitness Resolution

Megan Hazel 2007-12-29
Title: How to Stick to your New Years'' Fitness Resolution

We all know what it's like to make a New Year's Resolution with the best of intentions. We start out really positive, really motivated, really strong. No matter what the resolution, though, after about three weeks it just doesn't seem to be at the top of our priority list any longer. With fitness, maybe in the past you have promised yourself that you will meet a certain goal in a certain time this New Year, only to find yourself getting more and more discouraged as time passes and you haven't met that goal. Don't set yourself up to fail! You can create success by doing the following:

1.Map out a plan. You have heard the old adage "Those who fail to plan, plan to fail"? Nowhere is this truer than in the area of health and fitness. You simply can't decide to get in better shape or eat right without mapping out steps to follow through. If you decide to go to the gym, you need to decide what you are going to do there. Wandering around the equipment or deciding on the fly will not produce nearly the same results as having a goal and sticking to it. You may decide, for example, that you are going to commit to going to the gym five days a week. The next step here is to commit to doing specific exercises on those five days. For example, you could do 30 minutes of cardiovascular exercise on Monday, Wednesday, and Friday and weight train Tuesdays and Thursdays. You could "allow" yourself to choose the cardio machine each day to mix it up or keep it interesting, but stick to a specific plan for the days you strength train. By focusing on specific body parts on specific days, you will not only notice results in those areas in less time, you will remain motivated to keep it up. Why? Because you set a goal - doing back and biceps on Tuesday, for example, and chest and triceps on Thursday - and stuck to it! Pretty soon, your small achievements will turn into big ones.

2.Mix it up every six weeks. Once you have the routine down and you are feeling good about yourself, the last thing you want to do is fall into a rut. Many people abandon their fitness goals because they fall into the same pattern each time they exercise, and it feels more like a chore than a fun activity. If you find yourself on the same treadmill in the same row next to the same person at the gym every day, move on to the elliptical machine or the stationary bike instead. If you really enjoy the treadmill but you run the same three miles each time you're on it, try switching to one of the pre-programmed options on the treadmill, or make your own routine. For example, you could do intervals - running at a higher speed than usual for two minutes and walking for one minute in between - until your usual amount of time has elapsed. The same holds true for weight lifting. If you usually do 10-12 reps for 3 sets of a given weight, try lifting lighter weight and doing twice the number of repetitions, or heavier weight but fewer reps. Take a class that's offered, or even join a league sport or get outside for some other fitness options. You will stay fresh and energized and a lot less prone to the fitness blues.

3.Find "your" time of day. Making exercise enjoyable cannot be done if it doesn't feel like something you are doing for yourself and no one else. A big part of this pleasure comes from finding a time of the day you can carve out for "just you". This means a time of day that is generally open to you to do as you please, and that will not come with constant interruptions as the week's progress. It also means a time of day with which you are physically comfortable. If you tend to eat a really early dinner, you are likely not going to want to exercise right after work. If you are the type of person who doesn't mind eating lunch at your desk, perhaps a mid-day workout is just what you need to keep you alert and focused for the rest of your day and stay strong with your new exercise program. If you're the kind that leaps out of bed in the morning, a pre-dawn run outside may be just your ticket. Whatever works for you, do not underestimate finding a time of day that best suits your wants and the needs of yourself, work, and family.

By simply thinking ahead and incorporating these three simple ideas, you are already on your way to making life changes you can stick with, and that is the key. Good luck on your New Year and New You!


 

Choosing the Right Resolution When Scanning Images

Christine Peppler 2007-09-04
Title: Choosing the Right Resolution When Scanning Images

Scanners are great tools for converting images from prints, negatives, and slides into a digital form for the purposes of storage, editing, and sharing via the internet or to produce actual prints. The quality of the images from a scanner depends in large part upon resolution. Some scanners offer significantly higher resolution than others but most allow the user to adjust the resolution used for any given scan.

Because higher resolution means more detailed and higher quality images why would a user ever select to lower resolution? There are actually a couple of reasons why someone might decide to adjust the resolution downward when scanning.

One reason that the choice to use lower resolution would be considered is that higher resolution images contain more information. The downside of more information is that file sizes are much larger, requiring much more storage space. When storage space is limited, higher resolution images can be a drawback. Users must experiment to determine what level of quality they are willing to accept in order to preserve memory.

In addition to the increased storage needs, the larger file size of high resolution images creates a second drawback. Such images are slower to scan, manipulate, and download. A user may not wish to spend exorbitant amounts of time dealing with larger file sizes and those receiving or waiting for a web page to open that contains such files may become impatient with the process as well. Again, the user has to determine how much image quality they are willing to sacrifice to get smaller files that save time.

Determining what resolution to use when scanning can depend on a number of things: the type of material being scanned, the quality of the image, and how the resulting file will be used.

Slides and negatives require a higher resolution than a print. Because they start off quite small, they will likely be enlarged for viewing purposes. When any image is enlarged, greater resolution is needed to maintain acceptable image quality. The number of pixels or bits of image information needed for the enlarged image to be of reasonable quality may need to be 2,000 or more.

If an image being scanned is a text document less information will be needed to create a clear image and, indeed, a resolution of only 100 should be sufficient. If the image scanned is a picture that will be shared only via computer, then a resolution of 100 or so may still be quite acceptable as the resolution at which a computer screen is able to display is generally limited. However, if that same image will be printed, resolution will need to be greater; perhaps 300 to obtain an acceptable image. Just as explained when scanning slides however, if a user chooses to enlarge that same image, greater resolution will be required to maintain quality. For instance, if a 4x6 print will be scanned and enlarged to a 10x15 print, then a resolution of at least 600 would be wise.

Clearly, scanning images at the highest resolution can create optimum image quality but when speed of scanning and downloading are important or storage space is limited, users are wise to consider adjusting resolution downward in situations where acceptable image quality is possible with lower settings. Some experimentation will be required to find the level of image quality that is acceptable to an individual user.


 

Hdtv and Resolution: Full Technical Details

David Johnson 2007-06-06
Title: Hdtv and Resolution: Full Technical Details

The quality of the picture displayed on the TV screen is primarily the result of the television's "resolution." Put simply, TV 'resolution' refers to how many horizontal lines are displayed on the TV screen. There are two methods that can be used to display the lines on the screen - either "Interlaced" or "Progressive Scan." The NTSC adopted the standard known as "interlaced" to provide a method of compression that achieves a higher resolution using less-costly circuitry.

The NTSC-analog standard is "525 lines - interlaced, at 30 fps" (frames per second). This may be written as: 525-i/30 fps; however, only 480 lines are used to make the visible image, the remaining lines contain information pertaining to picture synchronization and are not seen. For this reason, the stated 'resolution' usually refers only to the visible lines; ie... 480-i/30 fps.

In using the "Interlaced" method, the 480 lines are created in two fields (phases). The "scan-rate" for these (2) fields is 60hz (60 times per second). In phase #1, the first 1/60th of a second, 240 lines (the odd numbered lines - 1,3,5 etc) are scanned on the tube. In the second 1/60th of a second, (phase #2)- the remaining 240 (even-numbered) lines are scanned. Thus each field of 240 lines is scanned 30 times a second, and produces one complete frame (30) times per second; (1/60 second X 2 fields = 2/60 second = 1 complete frame, 30 times per second). It's the total lines-per-image that indicates the resolution of the system, ie: (525-i or 480-i).

When resolution is considered, both the resolution of the transmitted signal and the (native) displayed resolution of a TV set are taken into account. Digital NTSC- and PAL/SECAM-like signals (480i60 and 576i50 respectively) are transmitted at a horizontal resolution of 720 or 704 "pixels". However these transmitted DTV "pixels" are not square, and have to be stretched for correct viewing. PAL TV sets with an aspect ratio of 4:3 use a fixed pixel grid of 768 × 576 or 720 × 540; with an aspect ratio of 16:9 they use 1440 x 768, 1024 × 576 or 960 × 540; NTSC ones use 640 × 480 and 852 × 480 or, seldom, 720 × 540. High Definition usually refers to one million pixels or more.

In Australia, the 576p50 format is also considered a HDTV format, as it has doubled temporal resolution though the use of progressive scanning. Thus, a number of Australian networks broadcast a 576p signal as their High-definition DVB-T signal, while others use the more conventional 720p and 1080i formats. Technically, however, the 576p format is defined as Enhanced-definition television.

Standard frame or field rates:

23.977p (allow easy conversion to NTSC)
24p (cinematic film)
25p (PAL, SECAM DTV progressive material)
30p (NTSC DTV progressive material)
50p (PAL, SECAM DTV progressive material)
60p (NTSC DTV progressive material)
50i (PAL & SECAM)
60i (NTSC, PAL-M)

HDTV also has formats that use the interlaced system; however, DTV also uses another system, called "Progressive Scan." The progressive system scans the total number of lines, 60 times a second; not half and half as in interlaced. This means you see the complete image displayed on your TV screen two-times more often. This results in smoother motion; moving images have less ‘motion artifacts’ with none of the visible "flicker." A progressive scan system with 480 lines of resolution is written, "480p." Interlace and Progressive Scan

As already stated, the ATSC has assigned (18) formats to Digital TV. HDTV is primarily concerned with just two of these formats at present: 1080-i and 720-p. (or Higher! - 1080p HDTV-Resolution is now a reality) The ATSC Standard for High Definition Television accepts either 1080 - interlaced scan lines, or 720 – progressive scan lines, or higher


 

Making Your New Year''s Fitness Resolution a Reality - Part 2

Paul M. Jerard Jr. 2006-01-25
Title: Making Your New Year''s Fitness Resolution a Reality - Part 2

Beware of "burn out." This usually happens after you have achieved a short-term goal. You pat yourself on the back and decide to "kick it up a notch," but your body is at the limit. You have to listen to your body. Although you can make improvements "in leaps and bounds," it is not a machine.

Use different approaches: Walk, use cardio machines, swim, and use weights. If you are bored, jump into a group fitness class such as Yoga, Pilates, cardio kickboxing, spinning, aerobics, body shaping, or something else. You may find one of them to be your "calling."

Don't knock anything until you have tried it. Many people perceive an exercise to be one thing, until they are deeply involved in it. There's nothing wrong with being the only man in a Yoga class. Also, there's nothing wrong with being the only woman in a martial arts class.

Fitness is an equal opportunity environment, so get the stereotypes out of your head and don't buy into classic excuses. I had a client with Cerebral Palsy on one side of her body. She had also been involved in a traffic accident, which caused permanent damage to her knee and ankle, on the other side of her body.

She used to drive an hour from her home in Massachusetts to our location in North Providence, Rhode Island. She was around 60 pounds over her ideal weight. She never made excuses or missed an appointment. She lost all of that weight within two years, and she is now a personal trainer.

Make sure the people you surround yourself with are supportive of your goals. For example: It's hard to lose weight if your husband insists on bringing home a supply of Big Macs every night. Your resolution may turn into a disaster if this is the case.

You may have to adjust your lifestyle to be persistent, positive, and goal oriented. Once you carry through, and succeed with one resolution, it will be a fantastic experience. This is the beginning of using goal-setting skills to enhance the quality of your entire life.

Lastly, remember this all started with writing down a plan that I mentioned in Part One. Your resolution should be as detailed as possible. Clearly define your resolution with realistic time frames and deadlines. Your odds of following through, making progress, and reaching your goals, will exponentially increase just by putting it in writing. Consider this a contract with yourself.

© Copyright 2005 - Paul Jerard / Aura Publications



 
 

Leave Comment

Author Name*
:
Author Email*
:
Comment*
:
Security Code*
: captcha