使用openCV裁剪图像的区域（java） [英] Crop image's area with openCV (java)

问题描述

我用openCv在我的图像中检测到了一个区域（矩形），并且我已经用它们的坐标存储了4个矩形点。

I have detected a area (rectangle) in my image with openCv and i have stored the 4 points of rectangle with their coordinates.

我想裁剪原始图像此区域中的图片。

I would to crop the original image in this area.

我有：

Mat image_original; 
Point p1,p2,p3,p4;
Mat image_output;

我是怎么做到的？
谢谢！

How i do this? Thanks!

推荐答案

Mat image_original; 
Point p1,p2,p3,p4;
Rect rectCrop = new Rect(p1.x, p1.y , (p4.x-p1.x+1), (p4.y-p1.y+1));
Mat image_output= image_original.submat(rectCrop);

这是根据您的要求裁剪图片的代码。我假设点p1 是裁剪矩形的左上角，点p4 是裁剪矩形的右下角，因为你没有提到关于他们职位的任何事情。

This is the code for croping image as per your requirement.I assumed that Point p1 is the top-left corner of the crop rectangle and Point p4 is the bottom-right corner of the crop rectangle as you have not mentioned anything about their positions.

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