Images made from ColorFunction-supplied Rasters
- To: mathgroup at smc.vnet.net
- Subject: [mg116717] Images made from ColorFunction-supplied Rasters
- From: Ulf-Dietrich Braumann <braumann at uni-leipzig.de>
- Date: Fri, 25 Feb 2011 06:33:49 -0500 (EST)
- Reply-to: braumann at uni-leipzig.de
Hello,
I am i bit puzzled looking on the following effect observed in version 8:
While the GrayScale output of
Image[Raster[{{0, 0.2, 0.4}, {0.6, 0.8, 1}}]]
Image[Raster[{{0, 0.2, 0.4}, {0.6, 0.8, 1}}/2]]
is scaled according to the applied factor 2,
once I run
Image[Raster[{{0, 0.2, 0.4}, {0.6, 0.8, 1}}, ColorFunction -> Hue]]
Image[Raster[{{0, 0.2, 0.4}, {0.6, 0.8, 1}}/2, ColorFunction -> Hue]]
or even
Image[Raster[{{0, 0.2, 0.4}, {0.6, 0.8, 1}}, ColorFunction -> GrayScale]]
Image[Raster[{{0, 0.2, 0.4}, {0.6, 0.8, 1}}/2, ColorFunction -> GrayScale]]
the output is identical since some Min-Max-Scaling seems to be applied.
Any ideas how to circumvent this kind of unwanted scaling?
BTW, replacing Image[] with Graphics[] works as expected, but I just
wanted to go the newly introduced way to directly obtain images from
rasters.
Thanks for your help - Ulf-Dietrich