| .TH GAMMA 3 "10 May 1991" |
| .SH NAME |
| im_gammacorrect \- carry out gamma correction |
| .SH SYNOPSIS |
| #include <vips/vips.h> |
| |
| int im_gammacorrect(in, out, exponent) |
| .br |
| IMAGE *in, *out; |
| .br |
| double exponent; |
| |
| .SH 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. |
| .SH SEE ALSO |
| im_histgr(3), im_heq(3), im_histeq(3), im_identity(3), im_maplut(3) |
| .SH COPYRIGHT |
| N. Dessipris |
| .SH AUTHOR |
| N. Dessipris \- 10/05/1991 |
