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08/13/2005 04:35:33 PM · #1 |
| When someone makes a comment and says it is too artifact, what does that mean exactly? |
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08/13/2005 04:56:30 PM · #2 |
it means there are imprefections in the photo that were put there from jpeg compression. When you save at lower quality jpeg you get shapes, and jaggies in images that wheren't originally there. Those are artifacts.
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08/13/2005 06:33:41 PM · #3 |
| Only the person who commented knows. |
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08/13/2005 06:47:17 PM · #4 |
JPEG artifacts are one type of artifact. In a more general sense, an artifact is any visible, undesired side effect of capture, processing or compression. The following are all artifacts:
- Noise is an artifact of the sensor
- Halos are a common sharpening artifact
- CA (chromatic aberration) is an artifact of poorly-corrected optics
- Posterization is an artifact of excessive exposure changes with cirves/levels
The list could go on forever. So whe someone sez that there are "artifacts", they really need to specify "artifacts of what." In the absence of any explanation, JPEG artifacts and sharpening artifacts are the most common visible problems.
Message edited by author 2005-08-13 18:47:42.
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