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