libgphoto2 photo camera library (libgphoto2) API
gamma.c File Reference
#include "config.h"
#include "gamma.h"
#include <math.h>
#include <gphoto2/gphoto2-result.h>
Include dependency graph for gamma.c:


int gp_gamma_correct_single (unsigned char *table, unsigned char *data, unsigned int size)
 Gamma correction. More...
int gp_gamma_fill_table (unsigned char *table, double g)
 Initialize a Gamma conversion table. More...

Detailed Description

Copyright 2001 Lutz Mueller
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Function Documentation

int gp_gamma_correct_single ( unsigned char *  table,
unsigned char *  data,
unsigned int  size 

Gamma correction.

Corrects size pixels within the table with a given Gamma correction table.

tablethe gamma correction table as generated by gp_gamma_fill_table()
datathe data do process, both input and output
sizein number of pixels (RGB byte pairs)
a gphoto error code
int gp_gamma_fill_table ( unsigned char *  table,
double  g 

Initialize a Gamma conversion table.

Initializes the gamma conversion table for later use by gp_gamma_correct_single(). Requires a 256 byte array as table.

tablea 256 byte array of unsigned char
ggamma correction value
a gphoto error code

References GP_OK.