1.利用opencv实现图像滑动窗口操作

功能：利用opencv实现图像滑动窗口操作（即利用已知尺寸的窗口遍历整幅图像，形成许多子图像） 
vs2015+opencv3.1 
2016.10

函数实现

#ifndef SLIDINGWND_H_

#define SLIDINGWND_H_

//简单的滑动窗口的形成

#include<iostream>

#include<opencv2\opencv.hpp>

using namespace std;

using namespace cv;

//基于矩形窗口的图像滑动窗口操作,返回值为滑动窗口的数目

//@src 输入图像

//@wnd 输出结果

//@wndSize 滑动窗口的大小

//@ x_percent 滑动窗口在x方向步长的百分比，x_step=x_percent*wndSize.width

//@ y_percent 滑动窗口在y方向步长的百分比，y_step=y_percent*wndSize.height

int slidingWnd(Mat& src, vector<Mat>& wnd, Size& wndSize, double x_percent, double y_percent)

{

    int count = 0;  //记录滑动窗口的数目

    int x_step = cvCeil(x_percent*wndSize.width);

    int y_step = cvCeil(y_percent*wndSize.height);

    /*String wndName = "F:\\wnd\\";

    char temp[1000];*/

    int64 count1 = getTickCount();

    double freq = getTickFrequency();

    //利用窗口对图像进行遍历

    for (int i = 0; i < src.cols- wndSize.width; i+=y_step)

    {

        for (int j = 0; j < src.rows- wndSize.height; j+=x_step)

        {

            Rect roi(Point(j, i), wndSize);

            Mat ROI = src(roi);

            wnd.push_back(ROI);

            count++;

        }

    }

    int64 count2 = getTickCount();

    double time = (count2 - count1) / freq;

    cout << "Time=" << time * 100 << "ms"<<endl;

    cout << count << endl;

    return count;

}

main.cpp

#include<iostream>

#include<opencv2\opencv.hpp>

#include"slidingWnd.h"

using namespace std;

using namespace cv;

void main()

{

    String imgName = "F:\\lena_gray.jpg";

    Mat src = imread(imgName);

    cvtColor(src, src, COLOR_RGB2GRAY);

    vector<Mat> wnd;

    int count=slidingWnd(src, wnd, Size(30, 30),0.3,0.3);

    imshow("src", src);

    waitKey(0);

原文链接：http://blog.csdn.net/jiamuju84/article/details/52893320

2.matlab滑动窗口截取图片并保存

clc;

clear all;

maindir = 'D:\MyDataSet\airplane\wheel\JPEGImages';

sundir =  fullfile( maindir, '*.jpg' );

images = dir(sundir);% 在这个子文件夹下找后缀为jpg的文件

% 遍历每张图片

for j = 1 : length( images )

        imagepath = fullfile( maindir,images( j ).name )

         imgdata = imread( imagepath );   % 这里进行你的读取操作

new_folder = strcat('F:\matlab\tools\output\',num2str(j))

mkdir(new_folder);

%num1,num2是你要设定的矩形框长和宽

num1=375;

num2=500;

[m,n,ch]=size(imgdata);

mm=m-num1;

nn=n-num2;

filenum=1;

for k=1:100:mm

   for kk=1:100:nn

   B=imgdata(k:k+num1,kk:kk+num2,:)

   imshow(B);

%   file = ['.\output\',num2str(floor((k+kk-1)/10)),'.jpg'];

   file = [new_folder,'\',num2str(filenum),'.jpg'];

   filenum=filenum+1;

   imwrite(B,file);

   if (kk+num2)>=n

       break;

   end

   if (k+num1)>=m

       break;

   end

   end

end

end

原文链接：http://blog.csdn.net/run_it_faraway/article/details/76862506