shape from shade, so i do not take over Bjorn's |
shape from shade, so i do not take over Bjorn's |
Apr 7 2010, 04:03 AM
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
So that i do not take over his nice thread i figured i would start a new one
I am just figuring it out so bear with me Rhea This is a example - very early example http://www.shatters.net/forum/viewtopic.php?f=5&t=15847 one that i am going to redo . the program i am using "Cyclops" has a few bugs Enceladus this is a good example a bit better than the above the close ups are a 8k level 3 VT with and without a texture over it then a 4k level2 vt unfortunately i still have to figure out a bug .I need to run a highpass on it ( the 32 bit isis dem ) Cyclops exports to a 3d *.ply this is easy to export to a isis cub and i get this ( this happens when i combine 16 smaller images into one big one ) and this example is at 1/2 size Just a bit of a bug !!! |
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Sep 2 2010, 01:16 PM
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Member Group: Members Posts: 378 Joined: 21-April 05 From: Portugal Member No.: 347 |
I've programed a simple SFS implementation in Actionscript (Adobe Flash) and I'm surprised by the results.
The algorithm is as simple as evaluating brightness difference over two adjacent pixels and the making the terrain go up or down accordingly. If I stick to non saturated original data and avoid completely shadowed areas, the resulting terrain is consistent. Here's what I'm getting (left - original, right - elevation, both images contrast enhanced for posting): -------------------- _______________________
www.astrosurf.com/nunes |
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