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Images made from ColorFunction-supplied Rasters


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


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