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Can not read image using MagickReadImageFile
Posted: 2016-06-22T02:03:58-07:00
by Luyen
When I read image using MagickReadImage, it is success.
However, using MagickReadImageFile, I can not read image.
I use window 7, QT.
Here is my code:
Code: Select all
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "magick/MagickCore.h"
#include "wand/MagickWand.h"
#include <opencv2/core.hpp>
#include <opencv2/highgui.hpp>
//#include <Magick++.h>
#include <iostream>
//#include <list>
#include <QFile>
#include <QDir>
#include <QFileInfo>
using namespace cv;
using namespace std;
//using namespace magick;
//using namespace Magick;
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);
}
void LoadGifImage(const char *filename, std::vector<cv::Mat> &dest)
{
cout << "Start LoadGifImage";
MagickBooleanType status;
MagickWand *magick_wand;
MagickWandGenesis();
MagickCoreGenesis(NULL, MagickTrue);
magick_wand = NewMagickWand();
ExceptionInfo *exception;
exception = AcquireExceptionInfo();
QFile qf(filename);
qf.open(QIODevice::ReadOnly);
int fd = qf.handle();
FILE *fp = fdopen(fd, "rb");
if (!fp){
qf.close();
}
status = MagickReadImageFile(magick_wand, fp);
qf.close();
fclose(fp);
//status = MagickReadImage(magick_wand, filename);
if (status == MagickFalse) {
cout << "Not sucess: ";
}
Image *image = GetImageFromMagickWand(magick_wand);
size_t image_num = MagickGetNumberImages(magick_wand);
cv::Mat img;
for (int i = 0; i < image_num; i++) {
//Convert Image structure into cv:Mat
img = cv::Mat(image->rows, image->columns, CV_8UC4);
ExportImagePixels(image, 0, 0, image->columns, image->rows,
"BGRA", CharPixel, img.data, exception);
dest.insert (dest.begin(), img);
if (i < image_num - 1)
image = GetPreviousImage(image);
}
cout << "End LoadGifImage";
}
int main(int, char** argv) {
char * filename0 = "D:\\asb\\res\\upload\\animal.gif";
vector <Mat> dest;
LoadGifImage(filename0, dest);
for(int i = 0; i < dest.size(); i++)
{
imwrite("D:\\asb\\res\\download\\giphy"+to_string(i)+".png", dest[i]);
}
return(0);
}
Pls help me.
Re: Can not read image using MagickReadImageFile
Posted: 2016-06-22T02:32:50-07:00
by snibgo
I don't know what QFile etc is or does. Can you make a minimal program that shows the problem, using just ImageMagick and standard library procedures?
Re: Can not read image using MagickReadImageFile
Posted: 2016-06-22T02:43:31-07:00
by Luyen
Here is my simple code:
Code: Select all
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wand/MagickWand.h>
MagickWand
*magick_wand;
int main()
{
FILE *fin;
MagickWandGenesis();
MagickBooleanType status;
magick_wand = NewMagickWand();
fin = fopen("D:\\asb\\res\\upload\\animal.gif", "r");
status = MagickReadImageFile(magick_wand, fin);
if(status == MagickFalse)
return -1;
fclose(fin);
MagickWandTerminus();
return 0;
}
I can not read image using MagickReadImageFile.
Re: Can not read image using MagickReadImageFile
Posted: 2016-06-22T03:24:39-07:00
by snibgo
It works fine for me, with IM v6.9.3-7. Adding a bit more code, in particular checking the fopen succeeded:
Code: Select all
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wand/MagickWand.h>
MagickWand
*magick_wand;
int main()
{
FILE *fin;
MagickWandGenesis();
MagickBooleanType status;
magick_wand = NewMagickWand();
fin = fopen("rose.gif", "rb");
if (fin == (FILE *)NULL) {
printf ("fopen failed");
}
status = MagickReadImageFile(magick_wand, fin);
if(status == MagickFalse) {
printf ("MagickReadImageFile failed");
return -1;
}
fclose(fin);
status = MagickWriteImage(magick_wand, "newrose.png");
if(status == MagickFalse) {
printf ("MagickWriteImage failed");
return -1;
}
MagickWandTerminus();
return 0;
}
Re: Can not read image using MagickReadImageFile
Posted: 2016-06-22T03:37:36-07:00
by Luyen
I copy your code, and It doesn't work also. I don't know why.
It shows "MagickReadImageFile failed".
Version: ImageMagick 6.9.3-7 Q16 x64 2016-03-06
http://www.imagemagick.org
Re: Can not read image using MagickReadImageFile
Posted: 2016-06-22T03:57:29-07:00
by snibgo
Can convert read your gif file, and write an output?
Re: Can not read image using MagickReadImageFile
Posted: 2016-06-22T18:11:51-07:00
by Luyen
Yes, of course.
I can use convert to process all kinds of images that IM support.
Re: Can not read image using MagickReadImageFile
Posted: 2016-06-22T18:18:25-07:00
by Luyen
When I use MagickReadImage instead of MagickReadImageFile, It's work.
You can see the code below:
Code: Select all
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wand/MagickWand.h>
MagickWand
*magick_wand;
int main()
{
FILE *fin;
MagickWandGenesis();
MagickBooleanType status;
magick_wand = NewMagickWand();
fin = fopen("D:\\asb\\res\\upload\\animal.gif", "rb");
if (fin == (FILE *)NULL) {
printf ("fopen failed");
}
const char * filename = "D:\\asb\\res\\upload\\animal.gif";
status = MagickReadImage(magick_wand, filename);
//status = MagickReadImageFile(magick_wand, fin);
if(status == MagickFalse) {
printf ("MagickReadImageFile failed");
return -1;
}
fclose(fin);
status = MagickWriteImage(magick_wand, "newrose.png");
if(status == MagickFalse) {
printf ("MagickWriteImage failed");
return -1;
}
MagickWandTerminus();
return 0;
}
Re: Can not read image using MagickReadImageFile
Posted: 2016-06-23T02:59:07-07:00
by snibgo
I don't know what might cause the problem.
You might try the equivalent of "-verbose -debug all":
Code: Select all
magick_wand->image_info->verbose = MagickTrue;
magick_wand->debug = MagickTrue;
SetLogEventMask("all");