使用數組矩陣將圖像轉換爲灰度RGB java

Question

我正在創建一個圖像過濾器程序，並且希望藉助數組矩陣將彩色圖片轉換爲灰度圖片。

這是我目前：

import java.awt.Color; 
import se.lth.cs.ptdc.images.ImageFilter; 

public class GrayScaleFilter extends ImageFilter { 

    public GrayScaleFilter(String name){ 
     super(name); 
    } 

    public Color[][] apply(Color[][] inPixels, double paramValue){ 
     int height = inPixels.length; 
     int width = inPixels[0].length; 
     Color[][] outPixels = new Color[height][width]; 
     for (int i = 0; i < 256; i++) { 
      grayLevels[i] = new Color(i, i, i); 
     } 

     for(int i = 0; i < height; i++){ 
      for(int j = 0; j < width; j++){ 
       Color pixel = inPixels[i][j]; 
      outPixels[i][j] = grayLevels[index];      
      } 
     } 
     return outPixels; 
    } 
} 

它看起來像我應該使用這個公式：（（R + G + B）/ 3）

我想創建一個陣列矩陣是這樣的：

Color[] grayLevels = new Color[256]; 
    // creates the color (0,0,0) and puts it in grayLevels[0], 
    // (1,1,1) in grayLevels[1], ..., (255,255,255) in grayLevels[255] 

這是我闖民宅太當我想用grascale類：

public abstract Color[][] apply(Color[][] inPixels, double paramValue); 

protected short[][] computeIntensity(Color[][] pixels) { 
    int height = pixels.length; 
    int width = pixels[0].length; 
    short[][] intensity = new short[height][width]; 
    for (int i = 0; i < height; i++) { 
     for (int j = 0; j < width; j++) { 
      Color c = pixels[i][j]; 
      intensity[i][j] = (short) ((c.getRed() + c.getGreen() + c 
        .getBlue())/3); 
     } 
    } 
    return intensity; 
} 

有關如何實現此目的的任何反饋？而不是使用outPixels[i][j] = new Color(intensity, intensity, intensity);

Answer 1

構建grayLevels數組是這樣的：

for (int i = 0; i < 256; i++) { 
    grayLevels[i] = new Color(i, i, i); 
} 

然後，當你需要某一種顏色，只需檢索它爲grayLevels[index]。