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setImageBias.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wand/MagickWand.h>
void ThrowWandException(MagickWand *wand) {
char *description;
ExceptionType severity;
description = MagickGetException(wand, &severity);
(void) fprintf(stderr,"%s %s %lu %s\n",GetMagickModule(),description);
description=(char *) MagickRelinquishMemory(description);
exit(-1);
}
int main(int argc,char **argv) {
MagickWand *magick_wand;
MagickBooleanType status;
unsigned long range;
double kernel[] = { -0.70,0,0.70,-0.70,0,0.70,-0.70,0,0.70 };
ExceptionInfo exception;
MagickWandGenesis();
magick_wand = NewMagickWand();
status = MagickReadImage(magick_wand, "./stack.jpg");
if (status == MagickFalse) {
ThrowWandException(magick_wand);
}
InitImageMagickOpenCL(MAGICK_OPENCL_OFF, NULL, NULL, &exception);
//status = MagickTransformImageColorspace(magick_wand, GRAYColorspace);
MagickGetQuantumRange(&range);
MagickSetOption(magick_wand, "convolve:scale", "0.1");
status = MagickSetImageArtifact(magick_wand, "convolve:scale", "0.1");
// if (status == MagickFalse) {
// printf("boo");
// exit(-1);
// }
//status = MagickSetImageBias(magick_wand, 0.5);
//Not sure if this is meant to be a quantum value
//It makes no difference
status = MagickSetImageBias(magick_wand, 0.5);
if (status == MagickFalse) {
ThrowWandException(magick_wand);
}
//status = MagickConvolveImage(magick_wand, 3, kernel);
status = MagickConvolveImageChannel(magick_wand, DefaultChannels, 3, kernel);
if (status == MagickFalse) {
ThrowWandException(magick_wand);
}
status = MagickWriteImages(magick_wand, "setImageBias_%d.jpg", MagickTrue);
if (status == MagickFalse) {
ThrowWandException(magick_wand);
}
magick_wand = DestroyMagickWand(magick_wand);
MagickWandTerminus();
return(0);
}