我试图用java在opencv中做一个对象跟踪程序，我有一个问题，当我尝试将原始的pictrure与thredholded结合使用时，我使用bitwise_and并且我不断收到此错误：
Exception in thread "main" CvException [org.opencv.core.CvException: cv::Exception: ..\..\..\..\opencv\modules\core\src\arithm.cpp:1021: error: (-209) The operation is neither 'array op array' (where arrays have the same size and type), nor 'array op scalar', nor 'scalar op array' in function cv::binary_op
]
at org.opencv.core.Core.bitwise_and_1(Native Method)
at org.opencv.core.Core.bitwise_and(Core.java:1149)
at opencv.Panel.main(Panel.java:151)
我不知道为什么因为我认为矩阵具有相同的大小，实际上thredhoded矩阵是基于原始矩阵创建的。
我在这里发布我的代码：
package opencv;
// Import the basic graphics classes.
// The problem here is that we read the image with OpenCV into a Mat object.
// But OpenCV for java doesn't have the method "imshow", so, we got to use
// java for that (drawImage) that uses Image or BufferedImage.
// So, how to go from one the other... Here is the way...
import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import javax.swing.*;
import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.highgui.VideoCapture;
import org.opencv.imgproc.Imgproc;
public class Panel extends JPanel{
private static final long serialVersionUID = 1L;
private BufferedImage image;
// Create a constructor method
public Panel(){
super();
}
private BufferedImage getimage(){
return image;
}
private void setimage(BufferedImage newimage){
image=newimage;
return;
}
/**
* Converts/writes a Mat into a BufferedImage.
*
* @param matrix Mat of type CV_8UC3 or CV_8UC1
* @return BufferedImage of type TYPE_3BYTE_BGR or TYPE_BYTE_GRAY
*/
public static BufferedImage matToBufferedImage(Mat matrix) {
int cols = matrix.cols();
int rows = matrix.rows();
int elemSize = (int)matrix.elemSize();
byte[] data = new byte[cols * rows * elemSize];
int type;
matrix.get(0, 0, data);
switch (matrix.channels()) {
case 1:
type = BufferedImage.TYPE_BYTE_GRAY;
break;
case 3:
type = BufferedImage.TYPE_3BYTE_BGR;
// bgr to rgb
byte b;
for(int i=0; i<data.length; i=i+3) {
b = data[i];
data[i] = data[i+2];
data[i+2] = b;
}
break;
default:
return null;
}
BufferedImage image2 = new BufferedImage(cols, rows, type);
image2.getRaster().setDataElements(0, 0, cols, rows, data);
return image2;
}
protected void paintComponent(Graphics g){
super.paintComponent(g);
//BufferedImage temp=new BufferedImage(640, 480, BufferedImage.TYPE_3BYTE_BGR);
BufferedImage temp=getimage();
//Graphics2D g2 = (Graphics2D)g;
if( temp != null)
g.drawImage(temp,10,10,temp.getWidth(),temp.getHeight(), this);
}
public static void main(String arg[]) throws InterruptedException{
// Load the native library.
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
//Frame Camara
JFrame frame = new JFrame("Camera");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(400,400);
Panel panel1 = new Panel();
frame.setContentPane(panel1);
frame.setVisible(true);
//Frame HVS
JFrame frame2 = new JFrame("HSV");
frame2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame2.setSize(400,400);
Panel panel2 = new Panel();
frame2.setContentPane(panel2);
frame2.setVisible(true);
//Frame Figure
JFrame frame3 = new JFrame("Figure");
frame3.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame3.setSize(400,400);
Panel panel3 = new Panel();
frame3.setContentPane(panel3);
frame3.setVisible(true);
//Definicion de Matrices
Mat webcam_image=new Mat();
Mat hsv_image=new Mat();
Mat thresholded=new Mat();
Mat figure=new Mat();
//hvs colour range
Scalar hsv_min = new Scalar(30, 100,100, 0);
Scalar hsv_max = new Scalar(70, 255,255, 0);
BufferedImage temp;
VideoCapture capture =new VideoCapture(0);
Thread.sleep(1000);
if( capture.isOpened())
{
while( true )
{
capture.read(webcam_image);
if( !webcam_image.empty() )
{
hsv_image=bgr2hsv(webcam_image);
Core.inRange(hsv_image, hsv_min, hsv_max, thresholded);
//TEST CODEE
//System.out.println(webcam_image.size());
//System.out.println(thresholded.size());
Core.bitwise_and(webcam_image, thresholded, figure);
//////////////////////////////////////
//Set Image
//Camera
frame.setSize(webcam_image.width()+40,webcam_image.height()+60);
temp=matToBufferedImage(webcam_image);
panel1.setimage(temp);
panel1.repaint();
//HSV
frame2.setSize(webcam_image.width()+40,webcam_image.height()+60);
temp=matToBufferedImage(thresholded);
panel2.setimage(temp);
panel2.repaint();
//Figure
frame3.setSize(webcam_image.width()+40,webcam_image.height()+60);
temp=matToBufferedImage(figure);
panel3.setimage(temp);
panel3.repaint();
}
else
{
System.out.println(" --(!) No captured frame -- Break!");
break;
}
}
}
return;
}
private static void trackRobot() throws AWTException{
}
private static Mat bgr2hsv(Mat bgr){
Mat hsv = new Mat();
Imgproc.cvtColor(bgr, hsv, Imgproc.COLOR_RGB2HSV);
return hsv;
}
}
抱歉我的英文
答案 0 :(得分：1)
垫子thresholded是CvType.CV_8UC1
正确的语法应该是
Core.bitwise_and(webcam_image, webcam_image, figure, thresholded);
或者您可以尝试将阈值转换为CvType.CV_8UC3
Imgproc.cvtColor(thresholded, thresholded, Imgproc.COLOR_GRAY2BGR, 3);
然后应用语法
Core.bitwise_and(webcam_image, thresholded, figure);