winforms：得到图像的xy值

Question

一张图片请教：1。根据一个黑点或一个字母检测到这个黑点或字母。2。得到这个点的x和y值。

Answer 1

首先对图像进行锐化，使边缘突出，然后进行二值化。用光栅发进行边缘检测
 我这里给你贴写源码 你自己试试
<code= c#>
 private void 边缘跟踪ToolStripMenuItem_Click(object sender, EventArgs e)
        {
           
         
            short[, ,] QiDian = new short[openImg_Info.i_bands, openImg_Info.i_lines + 2, openImg_Info.i_samples + 2];
           
                       for (int i = 0; i < openImg_Info.i_bands; i++)
            {
                for (int j = 0; j < openImg_Info.i_lines; j++)
                {
                    for (int k = 0; k < openImg_Info.i_samples; k++)
                    {
                        if (pixel[i][j][k] >= 200)
                        {
                            QiDian[i, j, k] = 1;
                                                       if (j + 1 < openImg_Info.i_lines && k - 1 >= 0 && Math.Abs(pixel[i][j][k] - pixel[i][j + 1][k - 1]) <= 50)
                            {
                               
                                QiDian[i, j + 1, k - 1] = 1;
                            }
                            if (j + 1 < openImg_Info.i_lines && Math.Abs(pixel[i][j][k] - pixel[i][j + 1][k]) <= 50)
                            {
                               
                                QiDian[i, j + 1, k] = 1;
                            }
                            if (j + 1 < openImg_Info.i_lines && k + 1 < openImg_Info.i_samples && Math.Abs(pixel[i][j][k] - pixel[i][j + 1][k + 1]) <= 50)
                            {
                                
                                QiDian[i, j + 1, k + 1] = 1;
                            }
                        }
                        else
                            _pixel[i][j][k] = 0;////未处理区域设为黑色
                    }
                }
            }           
            for (int i1 = 0; i1 < openImg_Info.i_bands; i1++)
            {
                for (int j1= 0; j1 < openImg_Info.i_lines; j1++)
                {
                    for (int k1 = 0; k1< openImg_Info.i_samples; k1++)
                    {
                        if (QiDian[i1, j1, k1] == 1)
                        {
                          
                            _pixel[i1][j1][k1] = 255;
                        }
                        else
                            _pixel[i1][j1][k1] = 0;
                    }
                }
                //设置图像显示波段
                display_rgb.r = 0;
                display_rgb.g = 1;
                display_rgb.b = 2;
                pictureBox2.Image = DrawPic(_pixel, display_rgb, false); //在第二个像框显示图像  
               
            }          
        }</code>

Answer 2

如果自己写的话，没有别的，只能遍历每一个像素。不过搂主可以下载一个OCR软件或者组件，然后看看有没接口可以调用，自己写，算法太复杂