If you mean to do .c file from that image I already tried to do that
I can just about imagine doing JPEG decoding on a Mega, for a very restricted set of JPEG files.
It would be exceedingly slow, and an exercise in advanced hair-loss.
It may be possible to do some other form of compression on the image, but it really depends on the image content.
If you've already got an SD card, store the image in a file as a BMP.