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CASIO Python Scripts

Python CCITT Decoder for Casio

This is the main attraction as it lets you store images in small file-sizes.

Creating and processing the image

Create an image use the dimensions 128 x 64 (The program should be able to handle smaller dimensions). The export it to PNG or JPEG. Using Image Magick convert the image to a CCITT Group 4 compressed image. Use the following command:

magick example.png -monochrome -compress Group4 example.tiff

Then using the ccittconvert.py script in the ccitt folder you strip the file of all metadata and output its hexadecimal interpretation. Make use of the following command:

python ./ccitt/ccittconvert.py example.tiff -H

Note: the script can also output to a binary file. See python ./ccitt/ccittconvert.py -h for more info

Transferring to the calculator

Download the ccitt.zip from here. Then extract the archive.
Plug-in your fx-9860G in USB Flash Mode. Copy the ccitt folder to the calculator.
Note this can also be made from source using the ccittrelease.py script Change the following in the image.py file:

your_image_name = "hexadecimal_string_output_here"

Edit the ccittdriver.py file, replacing the your_image_name with the name of the image input into the previous file. You should now have a file structure like this:

ROOT  
└── ccitt  
    ├── bitbuffer.py  
    ├── ccittcodes.py  
    ├── ccittdecoder.py  
    ├── ccittdriver.py  
    ├── ccittmodes.py  
    ├── image.py  
    └── modecodes.py

Now running the ccittdriver.py calculator should display your image (give a take a few tens of seconds). Note: the calculator might throw a MemoryError message if the image is too large

Credits

plaisted for creating a GO version of CCITTFaxDecode which the CCITT Decoder is based on
uniwix for creating a version of casioplot that is on PyPI which makes development much easier