#include #include double brightness(double g, int v) { /* inputs: * g gamma * v pixel value (0-255) * returns: * brightness value (percent) */ return 100 * pow((double)v/255, g); } int main() { int v; for (v = 0; v < 256; v++) printf("%d %f %f\n", v, brightness(1.8, v), brightness(2.5,v)); return 0; }