e-ink | Arduino library for E-Ink display

I am doing a e-ink project, the screen has 1404x1872 resolution and 16 colors grayscale. I am trying to convert Imagemagick below command to Wand:

I'm generating "single" color images (B/W and red/white) of our todo schedule to write images to an 3-color e-ink screen, with my Raspberry Pi. First write the black one, then overwrite with red. This works really great, so no help required there.

But I would also like to have the same image available on a website. So I need to have my red image "overwrite" the black one, so I also have the black/red/white image the e-ink shows, as a png/bmp/jpg/whatever. For now we're just using the black one, but I want my overdue stuff in red as well.

I already have imagemagick for the conversions from SVG to PNG/BMP etc., and I'm guessing it should be able to do this. However, I could not find any examples. It's also hard to define the right search parameters, since a lot of people want to combine two images next to or below eachother, not actually combining them.

Does anyone here know how to do this? (I'm not stuck on ImageMagick, but that's the tool I already use)

My guess would be I'd need to make the white in the red/white transparent, then somehow layer it on top... But how?

I want to execute gimp -if --batch-interpreter python-fu-eval -b 'import sys;sys.path=["."]+sys.path;import colorindex;colorindex.python_colorindex("gimptemp.jpg")' -b 'pdb.gimp_quit(1)' (which works fine when run in the terminal) from inside a script like this colorindex = subprocess.run(["/usr/bin/gimp", "-if", "--batch-interpreter", "python-fu-eval", "-b", "import sys;sys.path=['.']+sys.path;import colorindex;colorindex.python_colorindex('gimptemp.jpg')", "-b", "pdb.gimp_quit(1)"]) (which errors bc a gimp function cant find a needed palette)

Error:

I am making a script to limit any image into 3 colors (to be used in a program to display to an e-ink display). I want to do this using GIMP's gimp_image_convert_indexed function bc Wand and PIP's .quantize don't work how I want them to and don't look as good. This is on a headless raspi zero.

When I call the script using gimp -idf --batch-interpreter python-fu-eval -b 'import sys;sys.path=["."]+sys.path;import colorindex;colorindex.python_colorindex("gimptemp.jpg")' -b 'pdb.gimp_quit(1)' it gives me the error:

I am trying to build an application interacting with onenote using Microsoft Graph API. I found a official blog OneNote Ink BETA Apis talking about how to get ink data from pages and how to create pages with ink data, but it didn't address how to update ink data. Update OneNote page content talks only about how to update the HTML page of onenote(not the ink part). I wonder is there any way to update ink data(add, delete or change ink traces) ?

Also, there are no more ink related document or blog posted since OneNote Ink BETA Apis. But I found this API is still availiable in 1.0 version of MS Graph. So why these set of API are undocumented ? Will they get futher support or will be deprecated or become unavailable in the future ?

Thanks!

Hi I am working on a StackApp called Stack Exchange Readme Stats

It works as the following:

The markdown:

I want to power an E-Ink Display, and for that, I need 2-bit images. I am currently using Pillow to create an image and save it, but the options are only 1-bit and 8-bit for B&W / grayscale images:

My e-book reader (tolino shine 3) allows you to configure what the e-ink display should show when the screen is turned off. How can I do this programatically?

I wrote a little app, that turns on wifi every 10 minutes to fetch and display the latest weather report and then turns off wifi again. Since e-ink dipslays do not use power when nothing changes, I figured that the battery would last very long (my goal is 1 week) - but not so. Apparently Android keeps sucking the battery dry as long as the device is officially "on". After 2 days the show was over. If I could turn off the screen without clearing it I guess this would dramatically improve the run-time.

Any help would be appreciated. There's very little out there regarding e-ink APIs on Android.

The tolino shine 3 runs on Android 4.4.

I've been looking a lot around, and can't find much of anything clear. The context is I have a stylus-enabled e-ink tablet that I program on for fun, and I'd love to use a native library to read the pen events, and draw directly on the framebuffer. The vendor provides one, secret (a .so JNI lib that you can call with just a size parameter).

I suppose this is intended to activate a direct draw on the frame buffer, eventually with a refresh. But I can't grasp how it's supposed to compose with SurfaceFlinger and Android...

Anyone has experience with generic eink tricks to display from JNI via IOCTL that could explain me why I don't see the pixels changing unless I draw myself in java (I can change the update mode and draw quite fast, but... I want the fastest) ?

How could I verify writes on the FB ? Can an android app be "overlayed" by pixels written directly on the framebuffer ?