opencv实现图片的裁剪以及旋转
opencv实现图片的裁剪以及旋转
实现的基础:vs2013,opencv3.5
第一部分:图片的裁剪
直接上源码,
#include "stdafx.h"
#include <highgui.h>
#include <cxcore.h>
#include "math.h"
#include <cv.h>
#include "iostream"
using namespace std;
const char* filename1 = "C:\\Users\\Administrator\\Desktop\\hu\\English.tif";
int main(int argc, char** argv)
{
IplImage *img;
IplImage *img1;
img = cvLoadImage(filename1, CV_LOAD_IMAGE_COLOR);
cvNamedWindow("img", CV_WINDOW_AUTOSIZE);
cvShowImage("img", img);
CvRect rectInImage;
rectInImage = cvRect(0, 0, img->width, img->height*0.2);
CvSize size;
size.width = rectInImage.width;
size.height = rectInImage.height;
img1 = cvCreateImage(size, img->depth, img->nChannels);
cvSetImageROI(img, rectInImage);//基于给定的矩形设置图像的ROI
cvCopy(img, img1);
cvNamedWindow("img1", CV_WINDOW_AUTOSIZE);
cvShowImage("img1", img1);
cvResetImageROI(img);
cvWaitKey(0);
return 0;
}
效果:
第2部分:图片的旋转
同样直接上源码:
#include <highgui.h>
#include <cxcore.h>
#include "math.h"
#include <cv.h>
#include "iostream"
using namespace std;
const char* filename1 = "C:\\Users\\Administrator\\Desktop\\hu\\lenna.jpg";
int main(int argc, char** argv)
{
IplImage *img;
IplImage *img1;
img = cvLoadImage(filename1, CV_LOAD_IMAGE_COLOR);
cvNamedWindow("img", CV_WINDOW_AUTOSIZE);
cvShowImage("img", img);
CvSize size;
size.width = img->width;
size.height = img->height;
img1 = cvCreateImage(size, img->depth, img->nChannels);
//旋转中心为图像中心
CvPoint2D32f center;
center.x = float(img->width / 2.0 + 0.5);
center.y = float(img->height / 2.0 + 0.5);
//计算二维旋转的仿射变换矩阵
float m[6];
CvMat M = cvMat(2, 3, CV_32F, m);
cv2DRotationMatrix(center, 180, 1, &M);
cvWarpAffine(img, img1, &M, CV_INTER_LINEAR + CV_WARP_FILL_OUTLIERS, cvScalarAll(0));
cvNamedWindow("img1", CV_WINDOW_AUTOSIZE);
cvShowImage("img1", img1);
cvWaitKey(0);
return 0;
}
效果:
好了,刚见面就说再见,,(王者荣耀花木兰台词),谢谢!