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Digital Pictures size
Name: AIntPretty Date: February 26, 2009 at 18:19:32 Pacific OS: Windows XP Subcategory: General
Comment:
When I take JPEG pictures with my Sony T-7 camera they range in size from 1.1MB to 1.5MB. If I open them with any of several photo editors including MS Paint and save them without making any changes, they become much smaller - less than half their original size. Why is this? Am I loosing details? How can I keep the level of detail provided by the camera?
Name: pyrolitic Date: February 27, 2009 at 18:14:45 Pacific
Reply:
JPEG is a "lossy" digital picture format. It provides excellent compression and allows detailed photos to be easily transferred over the Internet. But, it is not a good format to use for professional quality digital photography because details can be "lost" with each copy. Do not know what options the Sony T-7 has, but most quality cameras provide some kind of "lossless" format choice for photos besides the popular JPEG. The problem is, "lossless" digital photo formats are much larger in memory size, easily 10x larger then the same picture in JPEG. But, any lossless digital photo will stay the same for every copy. In fact, with a lossless digital photo, it will be exactly the same even after being copied a million times because every copy is actually a "regeneration" of the original.
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Response Number 2
Name: AIntPretty Date: February 27, 2009 at 18:21:19 Pacific
Reply:
Thanks, That makes sense - I guess I never thought about that characteristic of JPEG.
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Response Number 3
Name: blueskyd Date: March 31, 2009 at 23:52:47 Pacific
Reply:
Hi , pyrolitic ! I have the similar problem , some times I take picture with my Canon camera as the same size but when I open them on my computer , some of them become larger than the original size and some other is smaller ! I do not know what's wrong with it ! Can you help me?
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