Determining if an Image is indexed or not

[Jeff Stewart]

Is there a procedure for determining whether or not an Image uses any of the
indexed pixel formats, short of checking against each one?

 

[Herfried K. Wagner [MVP]]

Is there a procedure for determining whether or not an Image uses any of
the indexed pixel formats, short of checking against each one?

I am missing 'Image.IsIndexedPixelFormat'... A heuristic way would be
checking the number of items in the image's palette:

\\\
Dim img As Image = Image.FromFile(...)
MsgBox("Indexed format: " & CStr(img.Palette.Entries.Length > 0))
img.Dispose()
///