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

[Avinoam Kalma]

Follow-up Comment #5, bug #45779 (project octave):

Checking BMP format in Wikipedia
([https://en.wikipedia.org/wiki/BMP_file_format]) shows that 
there us no option for an 8 bit image to be without color table,
unless it is stored as 24 bit image. So, there are two options to save eight
bit image
1. As 24 bit image (RGB image with three identical bands)
2. As 8 bit image with color map.

What does Matlab do when there is an eight bit image, but there is
no specific request for a map? 

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