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Old 11-11-2013, 03:33 AM   #17
Jellby
frumious Bandersnatch
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Posts: 7,560
Karma: 20150435
Join Date: Jan 2008
Location: Spaniard in Sweden
Device: Cybook Orizon, Kobo Aura
Quote:
Originally Posted by SBT View Post
The png versions show up all fuzzy on my PRS-T1, the gif ones are all right.
Hmm... I just compared one of the illustrations. The png is indexed color, not grayscale, maybe that's the problem (or the fact that the palette has only 16 colors, which is 4 bits...).

I've converted it to grayscale with:

Code:
pngcrush -c 0 -bit_depth 8 -force 019_indexed.png 019_grayscale.png
The size increases, but this may solve the problem. The file is slightly smaller if I save as grayscale from gimp, before pngcrush.

019_indexed.png -> original image (65792)
019_grayscale.png -> pngcrushed (67688)
019_grayscale_2.png -> gimped and pngcrushed (67510)

(the actual pixel data of all three images should be exactly the same)
Attached Thumbnails
Click image for larger version

Name:	019_indexed.png
Views:	298
Size:	64.3 KB
ID:	115000   Click image for larger version

Name:	019_grayscale.png
Views:	286
Size:	66.1 KB
ID:	115001   Click image for larger version

Name:	019_grayscale_2.png
Views:	325
Size:	65.9 KB
ID:	115002  
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