It seems that John's/Chris's Triple-Pic up-convertor is coming nicely to fruition, how about picture/file generation?
For the SSTV audio files I generated some years ago I knocked-up a .tiff file to .wav file convertor.
First you took your original colour .jpg, artistically cropped it, resized it to 256x256, converted it to greyscale, and saved it as a .tiff file. For this I used Irfanview, a freebie download which is more of a viewer than editor, but performs all we need for this. Though you could use something heavy-duty to do the same job, e.g. Photoshop.
This you fired at the convertor, which would output 120x120 or 128x128, at either US or EU rates. All at baseband and simultaneously with the SSTV subcarrier (two signals, Cop McDonald format). There are a few software versions for PCs and 'phones, but maybe they don't cater for this original format. No reason why someone couldn't develop one...though not me!! I've no idea where to start...
I've just reviewed the original hardware and software, both need some 'tidying-up' here and there, but the majority is already done. Perhaps a bit of updating too, it was some years ago...
Your thoughts?
Steve A.