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EnglishImages on WikiReader, posible?
Due itenacionalization on the device in on the way and is posible to run other apps , another way to improve the software is to be able to include image on it , taking in considreation the difficulty to do it on the limitations of the device 1bit of color (Black/White) and 240x208 pixels resolution, below I have selected a few random image from the Wikipedia using the Random Article special page and I have tried to tranform them to the format understandable to the device (pbm format) in the hypothetical situation it has an already included image viewer than allows to do vertical scroll , so all images has a with of 240 pixels. I think the results are quite promising due the process is the same for all image with same parameters and results are quite good to be the first attempt.
The process was done with GIMP and has been the following:
*Scale mantaining proportions to 240 pixels width
*Aply the comic filter with mask ratio=50 and Black amount=1.00
*Transform image to indexed color mode with palette Black and White (1 bit) Eliminating not used colors from pallet and bluring the color with Floyd-Steinberg using the blur of transparency
*Export to PBR option RAW
*Scale mantaining proportions to 240 pixels width
*Aply the comic filter with mask ratio=50 and Black amount=1.00
*Transform image to indexed color mode with palette Black and White (1 bit) Eliminating not used colors from pallet and bluring the color with Floyd-Steinberg using the blur of transparency
*Export to PBR option RAW
Comments
LCD grayscale possibility?
Great work! From looking at Epson's documentation for the S1C33E07 chipset, it looks like it may be possible to display 4-level or 16-level grayscale by putting the screen in 2-bits per pixel mode or 4-bits per pixel mode. The chip itself takes care of driving the LCD screen appropriately. See [1] and [2]. Given that full-screen display is probably required anyway, this sounds like a very intriguing possibility.
Yes, I have tried different
Yes, I have tried different approaches and sometimes simplest ones are just better. a little variation of what you have said
convert infile.png -geometry 240 +dither -colors 2 -colorspace gray -contrast-stretch 0 -normalize outfile.pbm
is a good candidate if anything better is found, another more complex but with very promising results is using GIMP theshold, but we must find a way to automatic caculate the good values per image... seems not too easy
Nice idea
Hello, that's a nice idea!
I tried to use ImageMagick on your images (convert image.jpg -scale 240x208 -depth 1 -dither image.pbm) and some pictures look even better (in my opinion).
Best regards
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