BigInt picToNumber(pic){
BigInt x = 0;
for (int r=0;r<pic.w;r++)
for (int c=0;c<pic.h;c++)
x = (x*265)+pic.pixel(r,c);
return x;
}
Perfect for storing a quantity of high resolution “unique numbers” which you might need to recall at some point, when you want to match them up with other oddly similar (but not precisely equal) high resolution unique numbers.
I hear that you can convert images to “unique numbers” using a technique known as “lossless compression” but that stuff’s all way above my pay grade.