Clouds? |
Clouds? |
Jul 8 2008, 01:38 AM
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#1
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Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
Was looking at some MGS imagery:
Kind of a low-contrast scene with some darker splotches here and there. Running that through an equalizing filter gives this image: Some surprising detail brought out there--it looks to me like there are small clouds casting shadows on the surface. Can that be right? They could be little hills I suppose. -------------------- |
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Jul 8 2008, 01:49 AM
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#2
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Member Group: Members Posts: 128 Joined: 10-December 06 From: Atlanta Member No.: 1472 |
QUOTE Some surprising detail brought out there--it looks to me like there are small clouds casting shadows on the surface. Can that be right? They could be little hills I suppose. Likely JPEG lossy-compression artifacts. |
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Jul 8 2008, 01:55 AM
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#3
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Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
Likely JPEG lossy-compression artifacts. The original images are from IMG files (256 pixels per degree MGS images http://www.msss.com/mgcwg/mgm/), only converted to JPG in the final step. I believe IMG files are lossless. -------------------- |
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