如何在位图指纹图像上获得非零位置？ [英] how to get the non zero location on a bitmap fingerprint image?

问题描述

我减去了两张指纹图像并得到了结果图像。现在我必须从结果图像中找到非零位置。



我怎样才能得到？请帮帮我。



这是我的减法代码。

I subtracted two fingerprint image and got the resultant image. Now I have to find the non zero location from the resultant image.

How can i get? Please help me for this.

This is my subtraction code.

public static Bitmap subtractImage(Bitmap minuend, Bitmap deduction, int relativeX, int relativeY)
{
    Bitmap b = minuend;
    Bitmap b1 = deduction;

    Bitmap random = new Bitmap(256, 256, System.Drawing.Imaging.PixelFormat.Format24bppRgb);

    Graphics g = Graphics.FromImage(random);
    g.DrawImage(b, new Point(0, 0));
    g.Dispose();

    Bitmap rec = new Bitmap(256, 256, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
    Graphics g1 = Graphics.FromImage(rec);
    g1.DrawImage(b1, new Point(0, 0));
    g1.Dispose();

    Bitmap result = new Bitmap(256, 256, System.Drawing.Imaging.PixelFormat.Format24bppRgb);

    //  Bitmap r = new Bitmap(256, 256, , System.Drawing.Imaging.PixelFormat.Format24bppRgb, IntPtr.Size);
    //Bitmap rand=new Bitmap(pictureBox1.Image,256,256,System.Drawing.Imaging.PixelFormat.Format24bppRgb,IntPtr.Zero);
    //Bitmap rec = new Bitmap(pictureBox2.Image,System.Drawing.Imaging.PixelFormat.Format16bppGrayScale,IntPtr.Zero);
    //Bitmap result = new Bitmap(256, 256);

    Difference filter = new Difference(random);
    result = filter.Apply(rec);
    result.Save("d:\\result.bmp");
    return result;
}

添加了 pre 标签。

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