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石英サンプルからなる鉄粒子を特定する画像処理を行い、そのために明るい灰色の背景にある黒色の斑点を特定する必要があります。私はこれを行うためのJavaプログラムを構築しました。しかし、このプログラムは画像の黒い斑点を特定しなかった。これで私を助けてください。 
opencv javaを使用して黒色を識別する方法
/*
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* and open the template in the editor.
*/
package imageprocessing;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import javax.imageio.ImageIO;
import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.MatOfPoint;
import org.opencv.core.Point;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
/**
*
* @author My Kindom
*/
public class imageprocessingf extends javax.swing.JFrame {
/**
* Creates new form imageprocessingf
*/
double sum =0;
public imageprocessingf() {
initComponents();
}
public double imageprocessing1(){
try{
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
//BufferedImage image= ImageIO.read(new File("C:\\Users\\My Kindom\\Desktop\\printscreen.JPG"));
BufferedImage image= ImageIO.read(new File("C:\\Users\\Samarasinghe\\Downloads\\IS_1.jpg"));
byte[] data =((DataBufferByte) image.getRaster().getDataBuffer()).getData();
Mat mat = new Mat(image.getHeight(),image.getWidth(), CvType.CV_8UC3);
mat.put(0, 0, data);
Mat mat1 = new Mat(image.getHeight(), image.getWidth(), CvType.CV_8UC3);
Imgproc.cvtColor(mat, mat1, Imgproc.COLOR_RGB2HSV);
byte[] data1 = new byte[mat1.rows()*mat1.cols()*(int)(mat1.elemSize())];
mat1.get(0, 0, data1);
BufferedImage image1 = new BufferedImage(mat1.cols(), mat1.rows(), 5);
image1.getRaster().setDataElements(0, 0, mat1.cols(), mat1.rows(), data1);
ImageIO.write(image1, "jpg", new File("C:\\Users\\Samarasinghe\\Desktop\\hsv.jpg"));
Mat source = Imgcodecs.imread("C:\\Users\\Samarasinghe\\Desktop\\hsv.jpg",Imgcodecs.CV_LOAD_IMAGE_COLOR);
Mat destination = new Mat(source.rows(),source.cols(),source.type());
destination = source;
Scalar lowerb=new Scalar (0,0,0);
Scalar upperb=new Scalar (180,255,30);
Core.inRange(source, lowerb, upperb, destination);
Imgcodecs.imwrite("C:\\Users\\Samarasinghe\\Desktop\\ThreshZero.jpg", destination);
List<MatOfPoint> contours= new ArrayList<>();
Mat hierarchy =new Mat();
Imgproc.findContours(destination, contours, hierarchy,Imgproc.RETR_EXTERNAL,Imgproc.CHAIN_APPROX_SIMPLE);
for(int j=0;j<contours.size();j++){
double[] d= hierarchy.get(0, j);
Rect rect = Imgproc.boundingRect(contours.get(j));
Point pt1=new Point(rect.x,rect.y);
Point pt2=new Point(rect.x+rect.width,rect.y+rect.height);
Scalar eder=new Scalar(0,255,0);
Imgproc.rectangle(destination, pt1, pt2, eder,2);
Mat contour = contours.get(j);
double contourarea=Imgproc.contourArea(contour);
sum = sum + contourarea;
}System.out.println("Sum"+sum);
}catch(Exception e){
}
return sum ;
};
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(272, Short.MAX_VALUE)
.addComponent(jButton1)
.addGap(55, 55, 55))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(164, Short.MAX_VALUE)
.addComponent(jButton1)
.addGap(113, 113, 113))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
imageprocessing1();
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(imageprocessingf.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(imageprocessingf.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(imageprocessingf.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(imageprocessingf.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new imageprocessingf().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
// End of variables declaration
}
すぐにお返事ください –