Image Display

Device Dependent Issues

• Gamma Correction
  • Compensate Display Non-linearities
  • (sometimes built-in)
• Gamut Mapping
  • Map to Displayable Colors
  • Color Clipping or Color Compression

Gamma Compensation using Color Maps

void cmap_gamma(CMap *m, Real gamval)
{
  int k;

  for (k = 0; k < 256; k++) {
    m->r[k] = 255 * pow(m->r[k]/255., 1./gamval);
    m->g[k] = 255 * pow(m->g[k]/255., 1./gamval);
    m->b[k] = 255 * pow(m->b[k]/255., 1./gamval);
  }
}