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NiLuJe · 05-26-2014, 05:30 PM

By using the swiss-army knife of CLI image processing, ImageMagick, to properly scale & dither down to the (nearly) exact palette of colours supported by the eInk tech.

For ref, the default settings:

Code:

convert Alloy\ of\ Law3.png -filter LanczosSharp -resize "758x1024" -background black -gravity center -extent "758x1024" -colorspace Gray -dither FloydSteinberg -remap ~SVN/Configs/trunk/Kindle/Touch_Hacks/ScreenSavers/src/linkss/etc/kindle_colors.gif -define png:bit-depth=8 -quality 75 "BR_MBSS_AL.png"

(Don't mind the crazy path to the colour map, I'm on a laptop, the file is shipped with the hack).

(The same kind of results can be achieved with any decent image editor, if you're somehow allergic to CLI

[But, FWIW, I just did that on OS X with IM installed via Homebrew]).

TL;DR: Yes, it usually ends up looking way better than what the default reader does, but it's also an order of magnitude slower

.

05-26-2014, 05:30 PM	#1121
NiLuJe BLAM! Posts: 13,506 Karma: 26047202 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	By using the swiss-army knife of CLI image processing, ImageMagick, to properly scale & dither down to the (nearly) exact palette of colours supported by the eInk tech. For ref, the default settings: Code: convert Alloy\ of\ Law3.png -filter LanczosSharp -resize "758x1024" -background black -gravity center -extent "758x1024" -colorspace Gray -dither FloydSteinberg -remap ~SVN/Configs/trunk/Kindle/Touch_Hacks/ScreenSavers/src/linkss/etc/kindle_colors.gif -define png:bit-depth=8 -quality 75 "BR_MBSS_AL.png" (Don't mind the crazy path to the colour map, I'm on a laptop, the file is shipped with the hack). (The same kind of results can be achieved with any decent image editor, if you're somehow allergic to CLI [But, FWIW, I just did that on OS X with IM installed via Homebrew]). TL;DR: Yes, it usually ends up looking way better than what the default reader does, but it's also an order of magnitude slower . Attached Thumbnails Last edited by NiLuJe; 05-26-2014 at 05:38 PM.