Question

我正在尝试使用带有Java的BoofCV来实现HOG描述符。 HOG的一个步骤是应用1-D内核如下：

Gx（x，y）= [ - 1 0 1] * I（x，y）

Gy（x，y）= [ - 1 0 1] T * I（x，y）

我为此步骤编写了以下代码：

import java.awt.image.BufferedImage;
import java.io.File;
import boofcv.alg.filter.convolve.GConvolveImageOps;
import boofcv.core.image.ConvertBufferedImage;
import boofcv.core.image.border.ImageBorder_F32;
import boofcv.gui.image.ShowImages;
import boofcv.io.image.UtilImageIO;
import boofcv.struct.convolve.*;
import boofcv.struct.image.ImageFloat32;

public class Main {

    public static void main(String[] args) {
        String IMAGE_LOCATION = "D:/dog_orig.jpg";
        File image_file = new File(IMAGE_LOCATION);

        if(!image_file.exists()) {
            System.err.println("Image not Found");
            System.exit(1);
        }

        // Load image
        BufferedImage pic  = UtilImageIO.loadImage(IMAGE_LOCATION   );

        // Initialize destinations images
        ImageFloat32 dest1 = new ImageFloat32(pic.getWidth(), pic.getHeight());
        ImageFloat32 dest2 = new ImageFloat32(pic.getWidth(), pic.getHeight());
        ImageFloat32 distortedImg = ConvertBufferedImage.convertFrom(pic, dest1);

        // Initialize kernel
        Kernel1D_F32 kx = new Kernel1D_F32(3);
        Kernel1D_F32 ky = new Kernel1D_F32(3);
        kx.data[0] = -1;
        kx.data[1] = 0;
        kx.data[2] = 1;

        ky.data[0] = 1;
        ky.data[1] = 0;
        ky.data[2] = -1;

        ImageBorder_F32 border = new ImageBorder_F32() {
            @Override
            public void setOutside(int arg0, int arg1, float arg2) {
                // TODO Auto-generated method stub   
            }
            @Override
            public float getOutside(int arg0, int arg1) {
                // TODO Auto-generated method stub
                return 0;
            }
        };

        // Apply 1-D mask horizontal
        GConvolveImageOps.horizontal(kx, distortedImg, dest2, border);
        // Apply 1-D mask vertical
        GConvolveImageOps.vertical(ky, distortedImg, dest2, border);

        BufferedImage destenation = new BufferedImage(dest2.getWidth(),dest2.getHeight(),BufferedImage.TYPE_BYTE_GRAY);
        destenation=ConvertBufferedImage.convertTo(distortedImg, destenation);
        ShowImages.showWindow( destenation,"image after apply kernel ");

        System.out.print("Done");
    }
}

但是我应用蒙版后图像没有变化。

输入图像。 Image 1

应用蒙版后的图像。 Image 2

这是真的还是代码中有错误，图像应该改变？

问候！提前谢谢！

此代码中是否存在应用1-D掩码的错误？

0 个答案: