It converts to "true color" and then save as "best" 256 color palette.
Here an same image edited and saved with four graphic editors (Paint, Paint Shop Pro 4, PictBear and Lazpaint) to check the difference.
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edit: sorry, I will try explain better the problem.
I'm noticed are several image editor saving wrong colors indexes. And only a few do it properly.
Unfortunately LazPaint is one making this wrong.
The number is indicating color indexI will say the color index in this order:
top right square, bottom right square, top left square, bottom left square, center (pink)
This is the original imagehttps://s6.postimg.org/4cjwgv6up/original_index.pngThe color index is:
1, 2, 3, 4, 0 - as indicates the image, of course
Now, we will modify and save the image in these programs:
LazPaint, RealWorld Paint, PictBear, Paint Shop Pro 4.The image edited with LazPaint:https://s6.postimg.org/slefetwmp/image_Laz_Paint.pngThe color index now is:
4, 1, 3, 0, 2 -
wrong indexThe image edited with RWPaint:https://s6.postimg.org/6v5lhjskx/image_RWPaint.pngThe color index now is:
1, 4, 2, 3, 0 -
wrong indexThe image edited with PictBear:https://s6.postimg.org/v06az9cvl/image_Pict_Bear.pngThe color index now is:
1, 2, 3, 4, 0 -
correct indexThe image edited with Paint Shop Pro 4:https://s6.postimg.org/pq1c7ysmp/image_Paint_Shot_PPro4.pngThe color index now is:
1, 2, 3, 4, 0 -
correct indexNote: You can view the color index with Paint Shop Pro 4 using the color selector toolexample:
https://s6.postimg.org/nb9gnjcdt/psp4_colors.gif