[Octave-bug-tracker] [bug #45779] Writing and 8-bit image to BMP produces a 24-bit bmp

[Mike Miller]

Update of bug #45779 (project octave):

                  Status:                    None => Confirmed              
        Operating System:       Microsoft Windows => Any                    

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Follow-up Comment #1:

According to https://www.mathworks.com/help/matlab/ref/imwrite.html, Matlab
can write BMP in 1-bit, 8-bit, or 24-bit formats. I'm assuming this means if a
logical matrix is passed in, then a 1-bit image is written with a black-white
palette. And if a uint8 matrix is passed in, it is written in 8-bit indexed
format with an 8-bit grayscale palette.

Determining the image format from the input matrix type is not something that
Octave imwrite handles yet, I think.

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