基于OpenCV实现的图像行方向循环移位

/** * @file SURF_Homography * @brief SURF detector + descriptor + FLANN Matcher + FindHomography * @author A. Huaman */ #include <stdio.h> #include <iostream> #include <cv.h> #include "opencv2/highgui/highgui.hpp" #include "opencv2/core/core.hpp" #include <opencv2/opencv.hpp> using namespace cv; using namespace std; #define KCV_ImageRow(ptr, step, row)\ ((ptr)+(step)* (row)) static void icvCircShiftUD_(const uchar* sptr_, int sstep, uchar* dptr_, int dstep, int w, int h, int yShift) { yShift = (h + yShift % h) % h; if (yShift == 0) return; sstep /= sizeof(sptr_[0]); dstep /= sizeof(dptr_[0]); const uchar* sptr = KCV_ImageRow(sptr_, sstep, h - yShift); uchar* dptr = dptr_; w *= sizeof(sptr[0]); for (int i = 0; i < yShift; ++i, sptr += sstep, dptr += dstep) { memcpy(dptr, sptr, 3*w);//3*w，移位的是3通道图像；w，移位的是单通道图像 } sptr = sptr_; for (int i = yShift; i < h; ++i, sptr += sstep, dptr += dstep) { memcpy(dptr, sptr, 3*w); } } int main() { IplImage* src = cvLoadImage("images\\lena.jpg",1);//1 代表导入彩色3通道图像，0代表导入黑白单通道图像 cvShowImage("src", src); const uchar* sptr = (uchar*)(src->imageData); int w = src->width; int h = src->height; int sstep = src->widthStep; IplImage *dst = cvCreateImage(cvSize(w, h), IPL_DEPTH_8U, 3);//3代表3通道图像，1代表单通道图像 uchar* dptr = (uchar*)(dst->imageData); int dstep = dst->widthStep; int yShift = 0; CvRNG rng; rng = cvRNG(cvGetTickCount()); for (int i = 0; i < 1000; i++)//产生1000幅循环移位图像 { printf("%d\n", cvRandInt(&rng) % h);//出来的是0~h的正整数 yShift = cvRandInt(&rng) % h; icvCircShiftUD_(sptr, sstep, dptr, dstep, w, h, yShift); char filename[255]; sprintf_s(filename, "images\\dst\\dst%d.jpg", i); cvSaveImage(filename, dst); } cvReleaseImage(&src); cvReleaseImage(&dst); cvWaitKey(-1); return 0; }