如何使用OpenCV从Java中的静态图像中删除背景? [英] How to remove the background from static image in Java using OpenCV?

问题描述

我正在尝试从具有一枚硬币或一张钞票的图像中删除背景.

I'm trying to remove the background from an image that has either one coin or one bill.

我尝试以下代码:

BackgroundSubtractorMOG BGS = new BackgroundSubtractorMOG(); 
BGS.apply(src, dest,0.1);

结果是黑色图像.

如何在Java中使用opencv做到这一点?

How can I do that in java using opencv?

图像将从相机中捕获，因此它可能具有背景，我想删除背景，图像可能像这样:

The image will be captured from the camera and so it could have background ,I want to remove the background ,, the image could be like that :

推荐答案

这是分割帐单的简单过程.基本上，由于背景是均匀的，因此您只需计算边缘的边界框即可.

This is a simple procedure to segment the bill. Basically, since background is uniform, you simply compute the bounding box of the edges.

此代码是C ++，但应易于移植到Java.请注意，您的jpeg图像具有许多压缩伪像.如果您有未压缩的图像(png)，效果会更好.

This code is in C++, but it should be easily ported to Java. Note that your jpeg image has many compression artifacts. If you have a non-compressed image (png) the result would be better.

#include <opencv2\opencv.hpp>
using namespace cv;
using namespace std;

int main() 
{
    Mat3b img = imread("path_to_image");

    Mat1b gray;
    cvtColor(img, gray, COLOR_BGR2GRAY);

    Mat1b edges;
    Canny(gray, edges, 400, 100);

    vector<Point> points;
    findNonZero(edges, points);

    Rect box = boundingRect(points);

    Mat3b bill(img(box));

    return 0;
}

bill图片:

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