用于显示多张图片——变量为图片组，图像尺寸，间隙，边界值，输出图片

#include <iostream>
#include <opencv2/opencv.hpp>using namespace cv;
using namespace std;//用于显示多张图片,变量为图片组，图像尺寸，间隙，边界值，输出图片
void ShowManyImages (const vector<cv::Mat>&srcImages,int nShowImageSize,int nSplitLineSize,int nAroundLineSize,Mat &outImage)
{
//图片数量
int nNumImages=srcImages.size();
//窗口大小
cv::Size nSizeWindows;
if(nNumImages>12)
{cout<<"不要超过12张，傻逼吧你"<<endl;return;
}
//根据图片数量设置
switch(nNumImages)
{case 1:nSizeWindows=Size(1,1);break;case 2:nSizeWindows=Size(2,1);break;case 3:case 4:nSizeWindows=Size(2,2);break;case 5:case 6:nSizeWindows=Size(3,2);break;case 7:case 8:nSizeWindows=Size(4,2);break;case 9:nSizeWindows=Size(3,3);break;default:nSizeWindows=Size(4,3);break;
}//图像尺寸，间隙，边界值//创建输出图像const int imagesHeight =nShowImageSize*nSizeWindows.width+nAroundLineSize+(nSizeWindows.width-1)*nSplitLineSize;
const int imagesWidth =nShowImageSize*nSizeWindows.height+nAroundLineSize+(nSizeWindows.height-1)*nSplitLineSize;
Mat showWindowsImages(imagesWidth,imagesHeight,CV_8UC3,Scalar(0,0,0));//提取小图像左上角x,y
int posX = (showWindowsImages.cols-(nShowImageSize*nSizeWindows.width+(nSizeWindows.width-1)*nSplitLineSize))/2;
int posY = (showWindowsImages.rows-(nShowImageSize*nSizeWindows.height+(nSizeWindows.height-1)*nSplitLineSize))/2;int tempPosX=posX;
int tempPosY=posY;//将每一幅图像放置到大图像对应位置for (int i=0; i< nNumImages;i++)
{
//小图标转换
if((i%nSizeWindows.width==0) && (tempPosX!=posX))
{tempPosX=posX;tempPosY +=(nSplitLineSize + nShowImageSize);
}
//小图像置于大图像处
Mat tempImage=showWindowsImages(Rect(tempPosX,tempPosY,nShowImageSize,nShowImageSize));//利用resize实现图像缩放
resize(srcImages[i],tempImage,Size(nShowImageSize,nShowImageSize));
tempPosX += (nSplitLineSize+nShowImageSize);}
outImage = showWindowsImages;}