实现效果

OpenCV获取轮廓/Blob最大内接矩形(带角度)

实现源码

一、C++ OpenCV实现：

#include "pch.h"#include <iostream>#include<opencv2/opencv.hpp>using namespace cv;using namespace std;Rect findMinRect(const Mat1b& src){Mat1f W(src.rows, src.cols, float(0));Mat1f H(src.rows, src.cols, float(0));Rect maxRect(0, 0, 0, 0);float maxArea = 0.f;for (int r = 0; r < src.rows; ++r){for (int c = 0; c < src.cols; ++c){if (src(r, c) == 0){H(r, c) = 1.f + ((r > 0) ? H(r - 1, c) : 0);W(r, c) = 1.f + ((c > 0) ? W(r, c - 1) : 0);}float minw = W(r, c);for (int h = 0; h < H(