OpenCV学习(十五)之图像金字塔

怼烎@ 2022-08-06 06:28 211阅读 0赞

实验环境：VS2010 + OpenCV2.4.9.0

#include <iostream>
    #include "cv.h"
    #include <highgui.h>
    
    using namespace std;
    using namespace cv;
    
    int main(int argc,char*argv[])
    {
    	char* wndName = "Pyramids Demo";
    	Mat img = imread("lena.jpg");
    	if(!img.data)
    	{
    		cerr <<"No Data!" << endl;
    		exit(1);
    	}
    	Mat tmp = img.clone();
    	Mat dst = tmp;
    	namedWindow(wndName,CV_WINDOW_AUTOSIZE);
    	imshow(wndName,dst);
    
    	while(TRUE)
    	{
    		char c;
    		c = waitKey(10);
    		if(c == 27)
    		{
    			break;
    		}
    		if(c == 'u')
    		{
    			pyrUp(tmp,dst,Size(tmp.cols * 2,tmp.rows * 2));
    			cout << "Zoom In: x2" <<endl;
    		}
    		else if(c == 'd')
    		{
    			pyrDown(tmp,dst,Size(tmp.cols/2,tmp.rows/2));
    			cout << "Zoom Out: /2" << endl;
    		}
    		imshow(wndName,dst);
    		tmp = dst;
    	}
    	return 1;
    }

实验结果：

原图：

![20141230224323009][]

两倍：(实际不是两倍，图片太大不能上传)

![20141230224452397][]

小两倍：

![20141230224516624][]

参考文献：

[http://baike.baidu.com/link?url=MjU9EooCucwD-lWqJ\_Brq4Hjt7hKszzEGP8AEFIu4rlBwKllkrYcNDZLZi2jJPlBtBlfIr-xN0XVkF1Ozum9Oa][http_baike.baidu.com_link_url_MjU9EooCucwD-lWqJ_Brq4Hjt7hKszzEGP8AEFIu4rlBwKllkrYcNDZLZi2jJPlBtBlfIr-xN0XVkF1Ozum9Oa]

[http://docs.opencv.org/doc/tutorials/imgproc/pyramids/pyramids.html][http_docs.opencv.org_doc_tutorials_imgproc_pyramids_pyramids.html]

链接一篇使用旧版本的例子：

[http://blog.csdn.net/hitwengqi/article/details/6857441][http_blog.csdn.net_hitwengqi_article_details_6857441]

[20141230224323009]: /images/20220806/54de0c71f8614c42b382667ad30d865b.png
[20141230224452397]: /images/20220806/6955ef3337c9430080991bcd377079ff.png
[20141230224516624]: /images/20220806/eff9f100b3ef4051916202b73ac7dec8.png
[http_baike.baidu.com_link_url_MjU9EooCucwD-lWqJ_Brq4Hjt7hKszzEGP8AEFIu4rlBwKllkrYcNDZLZi2jJPlBtBlfIr-xN0XVkF1Ozum9Oa]: http://baike.baidu.com/link?url=MjU9EooCucwD-lWqJ_Brq4Hjt7hKszzEGP8AEFIu4rlBwKllkrYcNDZLZi2jJPlBtBlfIr-xN0XVkF1Ozum9Oa
[http_docs.opencv.org_doc_tutorials_imgproc_pyramids_pyramids.html]: http://docs.opencv.org/doc/tutorials/imgproc/pyramids/pyramids.html
[http_blog.csdn.net_hitwengqi_article_details_6857441]: http://blog.csdn.net/hitwengqi/article/details/6857441