OpenCV之九宫格图像

         将一张图像均等分成九份，然后将这九个小块按一定间隔（九宫格效果）拷贝到新画布上。效果如下图所示：

 源码：

#include<iostream> #include<opencv2/opencv.hpp> using namespace std; using namespace cv; int main() { Mat src = imread("test.jpg"); if (src.empty()) { cout << "No Image!" << endl; system("pause"); return -1; } //原图宽高 int width = src.cols; int height = src.rows; int num = 3;//小方块数量(可实现任意等份分割) //制作九宫格每个小方块宽高 int step_x = width / num; int step_y = height / num; //重新resize图片尺寸 resize(src, src, Size(step_x * num, step_y * num), 1, 1, INTER_LINEAR); int space = 5; //空白间隔(实现九宫格效果) Mat canvas = Mat(Size(src.cols + space * (num-1), src.rows + space * (num - 1)), CV_8UC3, Scalar(255,255,255)); //画布，用来制作九宫格图片 //就图片分成9个小块，将每一小块抠图至画布 for (int i = 0; i < num; i++) { for (int j = 0; j < num; j++) { //小方块相对于原图左上角起点 int x = j * step_x; int y = i * step_y; //将小方块抠图至画布。其中，每扣一小块需跳过space空白 src(Rect(x, y, step_x, step_y)).copyTo(canvas(Rect(x + space * j, y + space * i, step_x, step_y))); //rectangle(src, Rect(x, y, step_x, step_y), Scalar(0, 255, 0), 2); } } imshow("canvas", canvas); imshow("test", src); waitKey(0); system("pause"); return 0; }