java 视觉识别线的颜色

原创

mob64ca12d61d6b 2024-06-10 06:01:33 ©著作权

©著作权归作者所有：来自51CTO博客作者mob64ca12d61d6b的原创作品，请联系作者获取转载授权，否则将追究法律责任

Java 视觉识别线的颜色

在现代社会，机器视觉技术得到了广泛的应用，机器可以通过摄像头获取图像信息，并对图像信息进行处理和识别。在视觉识别中，识别线的颜色是一个重要的应用场景。本文将介绍如何使用 Java 编程语言来实现识别线的颜色功能。

状态图

stateDiagram
    [*] --> Start
    Start --> ReadImage
    ReadImage --> ProcessImage: Line Detection
    ProcessImage --> RecognizeColor
    RecognizeColor --> [*]

类图

classDiagram
    class Image {
        - BufferedImage image
        + Image(BufferedImage image)
        + detectLines(): List<Line>
    }
    class Line {
        - List<Point> points
        - Color color
        + Line(List<Point> points, Color color)
        + getColor(): Color
    }
    class Point {
        - int x
        - int y
        + Point(int x, int y)
        + getX(): int
        + getY(): int
    }
    class Color {
        - int red
        - int green
        - int blue
        + Color(int red, int green, int blue)
        + getRed(): int
        + getGreen(): int
        + getBlue(): int
    }

代码示例

首先，我们需要读取图像并进行线的检测，可以使用 OpenCV 库来实现：

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.Scalar;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;

public class Image {
    private Mat image;

    public Image(Mat image) {
        this.image = image;
    }

    public List<Line> detectLines() {
        List<Line> lines = new ArrayList<>();
        Mat gray = new Mat();
        Imgproc.cvtColor(image, gray, Imgproc.COLOR_BGR2GRAY);
        Mat edges = new Mat();
        Imgproc.Canny(gray, edges, 50, 150);

        Mat linesMat = new Mat();
        Imgproc.HoughLinesP(edges, linesMat, 1, Math.PI / 180, 50, 50, 10);

        for (int i = 0; i < linesMat.rows(); i++) {
            double[] val = linesMat.get(i, 0);
            Point start = new Point((int) val[0], (int) val[1]);
            Point end = new Point((int) val[2], (int) val[3]);
            Line line = new Line(Arrays.asList(start, end));
            lines.add(line);
        }

        return lines;
    }
}

然后，我们需要识别线的颜色，可以通过计算线上各个像素点的平均颜色来实现：

public class Line {
    private List<Point> points;

    public Line(List<Point> points) {
        this.points = points;
    }

    public Color getColor() {
        int totalRed = 0;
        int totalGreen = 0;
        int totalBlue = 0;

        for (Point point : points) {
            totalRed += image.get(point.getX(), point.getY())[0];
            totalGreen += image.get(point.getX(), point.getY())[1];
            totalBlue += image.get(point.getX(), point.getY())[2];
        }

        int avgRed = totalRed / points.size();
        int avgGreen = totalGreen / points.size();
        int avgBlue = totalBlue / points.size();

        return new Color(avgRed, avgGreen, avgBlue);
    }
}