Gimp-Forum.net
Exporting BMP in 8-bit format - Printable Version

+- Gimp-Forum.net (https://www.gimp-forum.net)
+-- Forum: GIMP (https://www.gimp-forum.net/Forum-GIMP)
+--- Forum: General questions (https://www.gimp-forum.net/Forum-General-questions)
+--- Thread: Exporting BMP in 8-bit format (/Thread-Exporting-BMP-in-8-bit-format)



Exporting BMP in 8-bit format - 8bituser - 08-13-2021

I am using gimp 2.10.24.
I have a bmp image with 24-bit format.
I would like to export this BMP in 8-bit format.
How can i do that? The advanced option proposes only 16-bit, 24-bit and 32-bit formats.
Thanks in advance.


RE: Exporting BMP in 8-bit format - rich2005 - 08-13-2021

Quote:...I would like to export this BMP in 8-bit format...

Use Image -> Mode -> Indexed  with 256 colours and dithering if needed.

Export as a filename.bmp, the Advanced Options are greyed out. Depending on purpose you might need to toggle color space info on/off.

Screenshot (+ Imagemagick identify confirming 8 bit)   

[attachment=6527]


RE: Exporting BMP in 8-bit format - 8bituser - 08-13-2021

Thanks!

When i try to use my image converter that throws on me lot of messages: unknow color -{put here any integer number}
So, it doesn't work.

The older gimp has no such problem.

By the way, at Compability options, what should i do with color space information?
Check that or not?


RE: Exporting BMP in 8-bit format - rich2005 - 08-13-2021

Quote:The older gimp has no such problem.
By the way, at Compability options, what should i do with color space information?

Gimp 2.8 default had that option off (unchecked) so if you have it checked then un-check it. I find I need this off for some applications.


RE: Exporting BMP in 8-bit format - 8bituser - 08-13-2021

Well, thanks for the quick and kind replies.
I don't know what could be the problem with converter, as i wrote the older gimp output had no problem.
Thanks again.
Should I put a sign somewhere for the solution?