如何将图像像素化转换为矩阵 [英] how to convert a image pixelated to matrix

问题描述

你好

这个程序可以将图像转换为矩阵2d但是如果我想用像素化转换这个图像知道5x5或5度的像素那么我如何改变循环？ br $>

  public   int  [] [] GetBitMapColorMatrix（）
 {
 
位图b1 =  new 位图（imagess）; 
  int  hight = b1.Height; 
  int  width = b1.Width; 
  int  [] [] colorMatrix1 =  new   INT  [宽度] []; 
  for （ int  i =  0 ; i <  width; i ++）
 {
 colorMatrix1 [i] =  new   int  [hight]; 
 
  for （ int  j =  0 ; j <  hight; j ++）
 {
 colorMatrix1 [i] [j] =  new   int （）; 
 colorMatrix1 [i] [j] =（b1.GetPixel（i，j）.B）/  3  +（b1.GetPixel（i，j） .R）/  3  +（b1.GetPixel（i，j）.G）/  3 ; 
} 
} 
  return  colorMatrix1; 
 
} 

解决方案

永远不要使用 GetPixel / SetPixel 除非你只需要很少的;这太慢了。相反，使用 System.Drawing.Bitmap.LockBits ：

http://msdn.microsoft.com/en-us/library/system.drawing.bitmap.lockbits.aspx [ ^ ]。



关于这两种方法的MSDN文章包含自解释代码示例，请参阅。

-SA

hello
this program can be converting a image to matrix 2d but if i want converting this image with pixelation knowing that a pixel of 5x5 or degree of 5 then How do I change in loops ?

public int[][] GetBitMapColorMatrix()
        {

            Bitmap b1 = new Bitmap(imagess);
            int hight = b1.Height;
            int width = b1.Width;
            int[][] colorMatrix1 = new int[width][];
            for (int i = 0; i < width; i++)
            {
                colorMatrix1[i] = new int[hight];

                for (int j = 0; j < hight; j++)
                {
                    colorMatrix1[i][j] = new int();
                    colorMatrix1[i][j] = (b1.GetPixel(i, j).B) / 3 + (b1.GetPixel(i, j).R) / 3 + (b1.GetPixel(i, j).G) / 3;
                }
            }
            return colorMatrix1;

        }

解决方案

Never use GetPixel/SetPixel unless you only need very few of them; this is prohibitively slow. Instead, use System.Drawing.Bitmap.LockBits:
http://msdn.microsoft.com/en-us/library/system.drawing.bitmap.lockbits.aspx[^].

The MSDN articles on these two methods contain self-explaining code samples, please see.

—SA

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