SYNOPSIS

#include <vips/vips.h>

int im_gammacorrect(in, out, exponent)
IMAGE *in, *out;
double exponent;

DESCRIPTION

im_gammacorrect performs gamma correction to in. The result in written in out. The correction is carried out by creating a lookup table using the double exponent and mapping in through it. The exponent is applied on a ramp lut and the resultant lut is scaled. All channels of im are mapped through the lookup table.

COPYRIGHT

N. Dessipris

AUTHOR

N. Dessipris - 10/05/1991