We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.
Hi, I'm searching for a fast way to substract a dark image from another image. If the dark image pixel value is greater than the corresponding image pixel, the resulting image pixel should be zero. Otherwise, it should be simply substracted.
Are there special functions for doing this job?
I got an AT91SAM9260 processor and the image data is 10bit depth, laying in a 16-bit array.
Many thank, Stefan
You also mentioned saturation. Is it sorrect to assume that what you want is this:
for (x = 0; x < 752; x++) for (y = 0; y < 480; y++) if (dark[x][y] < image[x][y]) image[x][y] -= dark[x][y]; else image[x][y] = 0;
What's wrong with implementation in C? Did you try it? Is it too slow?
Currently I just use a similary implementation in C.
Since I have strange performance constraints, I want it to run as fast as possible. Maybe there is a way to get it faster using "special" commands or inline assembler (e.g. command QSUB - if I'm rigth).