前面介绍了如何批量的读取图片,从而也会有批量的显示一堆图片,那么在平时我们显示图片的时候,会发现都是一个图片一个窗口,会出来很多,这时候就会想到matlab中我们经常会使用subplot显示多张图片在一个窗口,之前http://blog.youkuaiyun.com/qq_20823641/article/details/51910066这篇文章也提供了一种方法,可以参考一下,经过进一步学习,从简单到复杂,再一次认为subplot(),感觉越来越有意思,虽然不是最好的,但是是入门比较好的,其中很多部分都可以进行优化,以后会在精通部分进行展示,这里已入门为主。
一、版本1
<span style="font-size:18px;">int main(void)
{
vector<Mat> imgs(2);
imgs[0] = imread("cm.png");
imgs[1] = imread("cm.png");
Mat dispImg;
int x, y;
x = imgs[0].cols;
y = imgs[0].rows;
int max;
max = (x > y)? x: y;
int dstsize=max;
dispImg.create(Size(dstsize*(1+1)+100,dstsize), CV_8UC3);
int nImg = (int)imgs.size();
for(int i=0;i<nImg;i++)
{
int m=20+i*max;
int n=20;
Mat imgROI = dispImg(Rect(m, n, (int)x, (int)y));
resize(imgs[i], imgROI, Size((int)x, (int)y));
}
namedWindow("winName");
imshow("winName", dispImg);
waitKey();
return 0;
}</span>
二、版本2
<span style="font-size:18px;">int main(void)
{
vector<Mat> imgs(6);
imgs[0] = imread("cm.png");
imgs[1] = imread("cm.png");
imgs[2] = imread("lina.png");
imgs[3] = imread("dr.png");
imgs[4] = imread("pom.png");
imgs[5] = imread("qop.png");
imshowMany("DOTA2_Hero", imgs);
waitKey();
return 0;
}
void imshowMany(const std::string& _winName, const vector<Mat>& _imgs)
{
int nImg = (int)_imgs.size();
Mat dispImg;
int size;
int x, y;
// w - Maximum number of images in a row
// h - Maximum number of images in a column
int w, h;
// scale - How much we have to resize the image
float scale;
int max;
if (nImg <= 0)
{
printf("Number of arguments too small....\n");
return;
}
else if (nImg > 12)
{
printf("Number of arguments too large....\n");
return;
}
else if (nImg == 1)
{
w = h = 1;
size = 300;
}
else if (nImg == 2)
{
w = 2; h = 1;
size = 300;
}
else if (nImg == 3 || nImg == 4)
{
w = 2; h = 2;
size = 300;
}
else if (nImg == 5 || nImg == 6)
{
w = 3; h = 2;
size = 200;
}
else if (nImg == 7 || nImg == 8)
{
w = 4; h = 2;
size = 200;
}
else
{
w = 4; h = 3;
size = 150;
}
dispImg.create(Size(100 + size*w, 60 + size*h), CV_8UC3);
for (int i= 0, m=20, n=20; i<nImg; i++, m+=(20+size))
{
x = _imgs[i].cols;
y = _imgs[i].rows;
max = (x > y)? x: y;
scale = (float) ( (float) max / size );
if (i%w==0 && m!=20)
{
m = 20;
n += 20+size;
}
Mat imgROI = dispImg(Rect(m, n, (int)(x/scale), (int)(y/scale)));
resize(_imgs[i], imgROI, Size((int)(x/scale), (int)(y/scale)));
}
namedWindow(_winName);
imshow(_winName, dispImg);
}</span>
http://blog.youkuaiyun.com/yang_xian521/article/details/7915396
http://kanwoerzi.iteye.com/blog/1304073
三、Matlab辅助 matlab就一个subplot()就搞定了,参考这个最后给出了matlab的代码和图片http://blog.youkuaiyun.com/qq_20823641/article/details/51910066
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