source: gssim_ui/branches/imgcutter/main_application/imgcutter.cpp @ 91

/*
 * MainApplication.cpp
 *
 *  Created on: 2011-03-09
 *      Author: JAWORA
 */
#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>

using namespace std;
using namespace cv;

int main(int argc, char **argv) {
        if (argc != 3)
        {
                cout << argv[0] << " imageFile partSize";
                return 0;
        }

        // source image
        IplImage *source = cvLoadImage(argv[1], 1);

        int roiSize = atoi(argv[2]);
        int partCount = 0;
        for(int j = 0; j < source->width/roiSize + 1; ++j) {
            for(int i = 0; i < source->height/roiSize + 1; ++i) {
                cvSetImageROI(source, cvRect(i*roiSize, j*roiSize,
                                (i*roiSize > source->width ? source->width % roiSize : roiSize),
                                (j*roiSize > source->height ? source->height % roiSize : roiSize)));

                // cropped image
                IplImage *cropSource = cvCreateImage(cvGetSize(source), source->depth, source->nChannels);

                // copy
                cvCopy(source, cropSource, NULL);

                // ... do what you want with your cropped image ...
                stringstream fileName;
                fileName << "out" << partCount << ".jpg";
                cvSaveImage(fileName.str().c_str(), cropSource);
                partCount++;

                // always reset the ROI
                cvResetImageROI(source);
            }
        }

        return 0;
}