25 lines
681 B
Groff
25 lines
681 B
Groff
.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
|