Legacy ImageMagick Discussions Archive

Afaik you can't extract 1 bit pixel data from the image with ImageMagick, it will always be scaled the the quantum format you choose. There are other libraries that can do that, like LibPNG.
Someone correct me if I'm wrong.

Got another problem.
MagickExportImagePixels can't seem to retrieve indexes for paletted images. I tried "I" for intensity, but that returns something else than index and it fails when I try "K" to get the black (or, in IndexPacket also representing the index)...

typedef enum { UndefinedPixel, CharPixel, DoublePixel, FloatPixel, IntegerPixel, LongPixel, QuantumPixel, ShortPixel } StorageType; You can provide one of those for the storage. Consider the size of the pixels with each storage type. The formula should be (number of channels)*(StorageType size). So ...

Yes, that is exactly what I've been looking for, thank you!

Edit: Disregard this, problem fixed.

I need to access indexes with MagickExportImagePixels, but the possible maps don't seem to have index in them, there is R, G, B, C, M, Y, K, Alpha, Opacity, Padding (?) and Intensity. I tried with intensity but it doesn't seem to return an index, instead returns an odd number for a paletted image ...