本文整理了Java中org.opencv.imgproc.Imgproc.contourArea()方法的一些代码示例，展示了Imgproc.contourArea()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Imgproc.contourArea()方法的具体详情如下：
包路径：org.opencv.imgproc.Imgproc
类名称：Imgproc
方法名：contourArea

Imgproc.contourArea介绍

[英]Calculates a contour area.

The function computes a contour area. Similarly to "moments", the area is computed using the Green formula. Thus, the returned area and the number of non-zero pixels, if you draw the contour using "drawContours" or "fillPoly", can be different. Also, the function will most certainly give a wrong results for contours with self-intersections. Example: ``

// C++ code:

vector contour;

contour.push_back(Point2f(0, 0));

contour.push_back(Point2f(10, 0));

contour.push_back(Point2f(10, 10));

contour.push_back(Point2f(5, 4));

double area0 = contourArea(contour);

vector approx;

approxPolyDP(contour, approx, 5, true);

double area1 = contourArea(approx);

cout << "area0 =" << area0 << endl <<

"area1 =" << area1 << endl <<

"approx poly vertices" << approx.size() << endl;
[中]计算轮廓面积。
该函数用于计算轮廓区域。与“力矩”类似，面积使用格林公式计算。因此，如果使用“drawContours”或“fillPoly”绘制轮廓，则返回的区域和非零像素数可能不同。此外，对于具有自相交的等高线，该函数肯定会给出错误的结果。示例：``
//C++代码：
矢量轮廓；
外形向后推（点2f（0,0））；
外形向后推（点2f（10,0））；
外形向后推（点2F（10,10））；
外形向后推（点2F（5,4））；
双面积0=轮廓面积（轮廓）；
向量近似；
近似聚合度（等高线，近似值，5，真实值）；
双面积1=轮廓面积（近似值）；
cout<<“area0=“<<area0<<endl<<
“area1=“<<area1<<endl<<
“近似多边形顶点”<<近似大小（）<<endl；

代码示例

代码示例来源：origin: openpnp/openpnp

public FluentCv filterContoursByArea(List<MatOfPoint> contours, double areaMin,
    double areaMax) {
  for (Iterator<MatOfPoint> i = contours.iterator(); i.hasNext();) {
    MatOfPoint contour = i.next();
    double area = Imgproc.contourArea(contour);
    if (area < areaMin || area > areaMax) {
      i.remove();
    }
  }
  return this;
}

代码示例来源：origin: openpnp/openpnp

@Override
  public Result process(CvPipeline pipeline) throws Exception {
    if (contoursStageName == null) {
      return null;
    }
    Result result = pipeline.getResult(contoursStageName);
    if (result == null || result.model == null) {
      return null;
    }
    List<MatOfPoint> contours = (List<MatOfPoint>) result.model;
    List<MatOfPoint> results = new ArrayList<MatOfPoint>();
    for (MatOfPoint contour : contours) {
      double area = Imgproc.contourArea(contour);
      if (area >= (minArea == -1 ? Double.MIN_VALUE : minArea) && area <= (maxArea == -1 ? Double.MAX_VALUE : maxArea)) {
        results.add(contour);
      }
    }
    return new Result(null, results);
  }
}

代码示例来源：origin: JavaOpenCVBook/code

for(int i=0;i<contours.size();i++){
  MatOfPoint currentContour = contours.get(i);
  double currentArea = Imgproc.contourArea(currentContour);