#include "stdafx.h" #include <stdarg.h> // va_list, va_start, va_arg, va_end #include <cv.h> #include <highgui.h> #include <cxcore.h> #include <iostream> using namespace std; void cvShowMultiImages(char* title,int nChannels, int nArgs, ...) { // img - Used for getting the arguments IplImage* img; // DispImage - the image in which all the input images are to be copied IplImage* DispImage; int size_r,size_c; // size - the size of the images in the window int ind; // ind - the index of the image shown in the window int x_c, y_r; // x_c,y_r - the coordinate of top left coner of input images int w, h; // w,h - the width and height of the image // r - Maximum number of images in a column // c - Maximum number of images in a row int r, c; // space - the spacing between images int space_r,space_c; // 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) { r = c = 1; size_r = 480; size_c = 640 ; } else if (nArgs == 2) { // x_c = size_row y_r=size_col r = 1; c = 2; // size_r = 705; size_c = 350 ; // specail set for show the full story of lena size_r = 405; size_c = 540 ; } else if ( nArgs == 3 || nArgs == 4) { r = 2; c = 2; size_r = 405; size_c =540 ; } else if (nArgs == 5 || nArgs == 6) { r = 2; c = 3; size_r = 360; size_c = 480; } else if (nArgs == 7 || nArgs == 8) { r = 2; c = 4; size_r = 200; size_c = 240; } else { r = 3; c = 4; size_r = 150; size_c = 200; } // Create a new 3 channel image to show all the input images // cvSize(width,height)=(col,row)=(y_r,x_c) DispImage = cvCreateImage( cvSize(30 + size_c*c,40 + size_r*r), IPL_DEPTH_8U, nChannels ); // Used to get the arguments passed va_list args; va_start(args, nArgs); // stdarg.h // Loop for nArgs number of arguments space_r = 40/(r+1); space_c = 30/(c+1); for (ind = 0, x_c = space_c, y_r = space_r; ind < nArgs; ind++, x_c += (space_c + size_c)) { // Get the Pointer to the IplImage img = va_arg(args, IplImage*); // stdarg.h // 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 w = img->width; h = img->height; // Used to Align the images // i.e. Align the image to next row e.g.r=1,c=2, this row is end , we have ind%c==0 , // then we move to the next row,even the next row can't through the cond ind < nArgs if( ind % c == 0 && x_c!= space_c) { x_c = space_c; y_r += space_r + size_r; } // Set the image ROI to display the current image cvSetImageROI(DispImage, cvRect(x_c, y_r, size_c, size_r)); //cvSetImageROI(DispImage, cvRect(x_c, y_r, (int)( w/scale_x ), (int)( h/scale_y ))); // 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); // End the number of arguments va_end(args); // Release the Image Memory cvReleaseImage(&DispImage); } int main( int argc, char** argv ) { IplImage* src1 = cvLoadImage("1002.png" ); IplImage* src2 = cvLoadImage("1002.png" ); IplImage* src3 = cvLoadImage("1002.png" ); IplImage* src4 = cvLoadImage("1002.png" ); cvShowMultiImages("1",3,4,src1,src2,src3,src4); system("pause"); return 0; }
