源码
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#include <iostream>#include <opencv2/core/core.hpp>#include <opencv2/imgproc/imgproc.hpp>#include <opencv2/highgui/highgui.hpp>#include<opencv2/opencv.hpp>using
namespace std;using
namespace cv;<br>int main(){// cvLoadImage( filename, -1 ); 默认读取图像的原通道数// cvLoadImage( filename, 0 ); 强制转化读取图像为灰度图// cvLoadImage( filename, 1 ); 读取彩色图 IplImage * srcImg=cvLoadImage("1.jpg",-1); IplImage *detImg=NULL; CvSize size; double
scale=0.314; size.width=srcImg->width*scale; size.height=srcImg->height*scale;<br> //创建图片并缩放 detImg=cvCreateImage(size,srcImg->depth,srcImg->nChannels);<br>// ·CV_INTER_NN - 最近-邻居插补// ·CV_INTER_LINEAR - 双线性插值（默认方法）// ·CV_INTER_AREA - 像素面积相关重采样。当缩小图像时，该方法可以避免波纹的出现。当放大图像时，类似于方法CV_INTER_NN。// ·CV_INTER_CUBIC - 双三次插值。) cvResize( srcImg,detImg,CV_INTER_AREA);<br> const
char *srcWin="image";//必须是const char*类型 const
char* detWin="scaled"; //创建窗口 cvNamedWindow(srcWin,CV_WINDOW_AUTOSIZE); cvNamedWindow(detWin,CV_WINDOW_AUTOSIZE); //在指定窗口中显示图像 cvShowImage(srcWin,srcImg); cvShowImage(detWin,detImg );<br> //等待按键事件 cvWaitKey();<br> const
char *saveName="scaled.jpg"; //保存图片 cvSaveImage(saveName, detImg);<br> //不要忘记释放 否则会内存泄露 cvDestroyWindow(srcWin); cvDestroyWindow(detWin); cvReleaseImage(&srcImg); cvReleaseImage(&detImg); return
0;} |
执行结果
原文：http://www.cnblogs.com/juaner767/p/3627055.html