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10/06/2005 01:36:27 AM · #1 |
can someone tell me everything about it... tnx a lot
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10/06/2005 01:44:07 AM · #2 |
Originally posted by busalshots:
can someone tell me everything about it... tnx a lot |
Compression in an image is when an image is reduced in quality to reduce the overall image FILE size. To the naked eye maybe it's not noticable as compared to the un-compressed image, but if you zoom in or enlarge it, you can see artifacts, or washed out areas. So the higher the compression, the lower the image quality. |
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10/06/2005 01:48:36 AM · #3 |
| My doctor prescribes anti-compressants. They make me feel... less squished. |
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10/06/2005 01:48:46 AM · #4 |
Everything?
Kind of by definition, when you save a file using compression (generally JPG format) you save space by throwing out information. the algorythim that does it is very good, so it depends on what the end use of the image is what you might choose as the compression setting. remember, that if you don;'t get and save the info when you get the pic, you cannot go back and add in the info.
if you are going to print big, or crop a lot, then by all means save at the highest setting (highest as in quality, so least compression).
if all you have are vacation snaps that will be web fodder or 4x6 prints, then even medium quality should be fine, and for web use least quality is plenty sufficient.
that said...when i had my fuji s602 i used largest image at highest quality. BUT i went on vacation (long weekend really) and used mid grade and ended up with some issues on some images (jaggies on slanted items like wires, branches, etc)
With my rebel, i just spent the bucks and got 4gb of cards. I can save about 1100 images now, so no need to compromise. HD space is cheap, or you can back up to CD/DVD.
editing Okay, you have an image and open it in your favorite editor and save it (as a JPG in this example). There is some loss of info, 'details' or something has been left out. THe best example i saw of this was a pic of a sailboat, saved 4 or 5 times - then the 5th generation was compared with the first - hardware fittings, lights, and other small details actaully vanished from the last image! If you did not see the original you would not have known, but still...
So if you save it as a work in progress, use TIF or in photoshop the native PSD format. |
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10/06/2005 01:57:27 AM · #5 |
ok im gettin there...
so i can't do anythin about a 5th generation pic?
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10/06/2005 02:30:12 AM · #6 |
Originally posted by busalshots:
ok im gettin there...
so i can't do anythin about a 5th generation pic? |
dude, can you ask in more detail what you want to know?
what is a 5th generation pic? |
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10/06/2005 02:50:31 AM · #7 |
Originally posted by shadow:
Originally posted by busalshots:
ok im gettin there...
so i can't do anythin about a 5th generation pic? |
dude, can you ask in more detail what you want to know?
what is a 5th generation pic? |
I think he means: Open original, save jpg, open jpg, save jpg, open jpg, save jpg, open jpg, save jpg. |
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10/06/2005 02:53:40 AM · #8 |
Originally posted by kpriest:
Originally posted by shadow:
Originally posted by busalshots:
ok im gettin there...
so i can't do anythin about a 5th generation pic? |
dude, can you ask in more detail what you want to know?
what is a 5th generation pic? |
I think he means: Open original, save jpg, open jpg, save jpg, open jpg, save jpg, open jpg, save jpg. |
yup that's what i meant.... bcoz after enhancing the image and resizing, it has lost quality
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10/06/2005 09:03:37 PM · #9 |
Originally posted by busalshots:
Originally posted by kpriest:
I think he means: Open original, save jpg, open jpg, save jpg, open jpg, save jpg, open jpg, save jpg. |
yup that's what i meant.... bcoz after enhancing the image and resizing, it has lost quality |
Personally, I do not save to JPEG format before I know I've reach the final edited version of the photo. |
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