Re: Tiff with signed samples

On 8/18/20 4:52 PM, Bob Friesenhahn wrote:
> That is good to know.  As long as I know what to do, it is likely not 
> difficult for me to support signed values as a post-processing step in 
> the TIFF reader.  GraphicsMagick has the ability to support large 
> colormaps (64k entries), which could be really useful in order to 
> "colorize" an image like this.
>
That could be convenient.
> From values of adjacent "height" pixels, compute a normal vector, and 
> store as a unit vector XYZ in RGB channels. XY are tangent to the 3d 
> surface and Z points away from the surface. 50% means 0. Default 
> normal is sticking straight away from the surface, usually coded as 
> (.5, .5, 1.0).
>
> That sounds interesting.  Do you have programming talents? :-)
I  feel like "talents" might be too strong a word considering the 
sprawling mess I call code, but I did make this: https://laidout.org
which, by the way, uses GraphicsMagick++ for image loading and saving, 
so thanks for that! I have vague plans to incorporate more 
graphicsmagick functions to Laidout's node graph tool, but need to think 
about that more.

-Tom



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