在一个窗口中显示多张图片

忘记了是引用那位大神的了

// showManyImage.cpp : Defines the entry point for the console application.//#include<opencv2\opencv.hpp>#include <stdio.h>#include <stdarg.h>#include <time.h>#include <iostream>using namespace std;using namespace cv;void cvShowManyImages(char* title, int nArgs, ...){    // img - Used for getting the arguments     IplImage *img;    // DispImage - the image in which input images are to be copied    IplImage *DispImage;    int size;    int i;    int m, n;    int x, y;    // w - Maximum number of images in a row     行    // h - Maximum number of images in a column  列     int w, h;    // scale - How much we have to resize the image    float scale;    int max;    // If the number of arguments is lesser than 0 or greater than 12    // return without displaying     if (nArgs <= 0) {        printf("Number of arguments too small....\n");        return;    }    else if (nArgs > 12) {        printf("Number of arguments too large....\n");        return;    }    // Determine the size of the image, and the number of rows/cols  from number of arguments     else if (nArgs == 1) {        w = h = 1;        size = 300;    }    else if (nArgs == 2) {        w = 2; h = 1;        size = 300;    }    else if (nArgs == 3 || nArgs == 4) {        w = 2; h = 2;        size = 300;    }    else if (nArgs == 5 || nArgs == 6) {        w = 3; h = 2;        size = 200;    }    else if (nArgs == 7 || nArgs == 8) {        w = 4; h = 2;        size = 200;    }    else {        w = 4; h = 3;        size = 150;    }    // Create a new 3 channel image0    DispImage = cvCreateImage(cvSize(100 + size*w, 60 + size*h), 8, 3);    // Used to get the arguments passed    va_list args;    va_start(args, nArgs);    // Loop for nArgs number of arguments    for (i = 0, m = 20, n = 20; i < nArgs; i++, m += (20 + size)) {        // Get the Pointer to the IplImage        img = va_arg(args, IplImage*);        // Check whether it is NULL or not        // If it is NULL, release the image, and return        if (img == 0) {            printf("Invalid arguments");            cvReleaseImage(&DispImage);            return;        }        // Find the width and height of the image        x = img->width;        y = img->height;        // Find whether height or width is greater in order to resize the image        max = (x > y) ? x : y;        // Find the scaling factor to resize the image        scale = (float)((float)max / size);        // Used to Align the images        if (i % w == 0 && m != 20) {            m = 20;            n += 0 + size;        }        // Set the image ROI to display the current image        //cvSetImageROI(DispImage, cvRect(m, n, (int)( x/scale ), (int)( y/scale )));        cvSetImageROI(DispImage, cvRect(m, n, (int)(x / scale), (int)(y / scale)));        //      cout<<"x="<<m<<"y="<<n<<endl;        // Resize the input image and copy the it to the Single Big Image        cvResize(img, DispImage);        // Reset the ROI in order to display the next image        cvResetImageROI(DispImage);    }    // Create a new window, and show the Single Big Image    //cvNamedWindow( title, 1 );    cvShowImage(title, DispImage);    /*cvWaitKey(0);*/    //cvDestroyWindow(title);    // End the number of arguments    va_end(args);    // Release the Image Memory    cvReleaseImage(&DispImage);}