Acquiring (Twain) grey scale images sets wrong type

[eyebex]

Hi,

after acquiring a grey scale image from a scanner using Twain, the status bar in XnView e.g. displays "1267x1754x8" (which is correct), but internally the image type does not seem to have been set to "8-bit grey scale".

I'm guessing so because when you save a just acquired image, you get the "Save as - color mode..." dialog and several tools, e.g. "Image" -> "Rotate" -> "De-skew..." say that "You can only use 'De-Skew' on white&black or greyscale picture", which it already should be. If I choose "Image" -> "Convert to Grey" -> "256 Grey scale" (which does not change the image visibly) it works.

I believe this worked okay in versions < RC 1.

V 1.90 RC2

[xnview]

Hi,

after acquiring a grey scale image from a scanner using Twain, the status bar in XnView e.g. displays "1267x1754x8" (which is correct), but internally the image type does not seem to have been set to "8-bit grey scale".

I'm guessing so because when you save a just acquired image, you get the "Save as - color mode..." dialog and several tools, e.g. "Image" -> "Rotate" -> "De-skew..." say that "You can only use 'De-Skew' on white&black or greyscale picture", which it already should be. If I choose "Image" -> "Convert to Grey" -> "256 Grey scale" (which does not change the image visibly) it works.

I believe this worked okay in versions < RC 1.

Perhaps the scanned picture is in 256 colors (colormap is grey)

[eyebex]

No, it's not. As I said, it worked fine in XnView in some previous 1.9 pre-release version, and it also works fine in other applications (e.g. The GIMP).