如何比较RGB值和颜色？ [英] How to Compare an RGB Value to Color?

问题描述

我正在扫描 BufferedImage 中的像素，以查看某些像素是否是特定颜色。我已经尝试这样做了以下：

  for（int x = 0; x <16; x ++）{
 for（int y = 0; y <16; y ++）{
 if（image.getRGB（x，y）== new Color（209,167,86）.getRGB out.println（Same Color Detected！）; 
} 
} 
  

但 image.getRGB ）向 Color.getRGB（）返回不同的值。

这些是值的一些示例（第一个数字来自图片，第二个是我比较的颜色）：

  0：-8060928 
 -16777216：-8060928 
 -3037354：-8060928 
 -3037354：-8060928 
 -16777216：-8060928 
  

以下是我获取图片的方式：

  playerOrig = ImageIO.read（getClass（）。getResourceAsStream（/ Player / player.gif））; 
 

我使用Eclipse和Java 1.6

我打印出图像的 ColorModel ，并得到：

  IndexColorModel：#pixelBits = 4 numComponents = 4 color space = java.awt.color.ICC_ColorSpace@45d6a56e transparency = 2 transIndex = 11 has alpha = true isAlphaPre = false 
  

然后我打印出 Color 对象的 ColorSpace 并得到了这个：

  java.awt.color.ICC_ColorSpace@45d6a56e 
  pre> 
 
 
下面的图片：
 
 
 
  
解决方案
 
 
 
 
 注意：我测试了我的本地机器上的代码，它对我来说很好，因为你有默认的 ColorModel 。我使用OSX和 Java（TM）SE运行环境（版本1.7.0_25-b15）好运！ 
 
 
 
这是一个链接到我在GitHub.com上的整个Mavenized项目 
 
 
 
  import javax.imageio.ImageIO; 
 import java.awt.Color; 
 import java.awt.image.BufferedImage; 
 import java.io.File; 
 import java.io.IOException; 
 
 public class Q23751298 
 {
 public static void main（String [] args）
 {
 try 
 {
 / / final BufferedImage img = ImageIO.read（new File（/ Users / jhr / Pictures / fu4FM.gif））; 
 final BufferedImage img = ImageIO.read（Q23751298.class.getResource（/ fu4FM.gif））; 
 final int match = new Color（209，167，86）.getRGB（）; 
 
 for（int x = 0; x  {
 for（int y = 0; y  {
 final int irgb = img.getRGB（x，y）; 
 if（irgb == match）
 {
 System.out.format（％d /％d =％d：％d\\\
，x，y，img.getRGB （x，y），match）; 
} 
} 
} 
} 
 catch（IOException e）
 {
 System.out.println（e.getMessage ; 
} 
} 
} 
  
为您发布的 16 X 16 文件：
  4/9 = -3037354：-3037354 
 4/10 = -3037354：-3037354 
 4/11 = -3037354：-3037354 
 6/4 = -3037354：-3037354 
 7 / 4 = -3037354：-3037354 
 7/5 = -3037354：-3037354 
 7/6 = -3037354：-3037354 
 7/7 = -3037354：-3037354 
 8/4 = -3037354：-3037354 
 8/5 = -3037354：-3037354 
 8/6 = -3037354：-3037354 
 8/7 = -3037354：-3037354 
 9/4 = -3037354：-3037354 
 9/7 = -3037354：-3037354 
 10/5 = -3037354：-3037354 
 10/6 = -3037354：-3037354 
 12/10 = -3037354：-3037354 
 12/11 = -3037354：-3037354 
  
 
I'm scanning through the pixels in a BufferedImage to see if some of the pixels are a certain color. I've tried this by doing the following:
for(int x = 0; x < 16; x++) {
    for(int y = 0; y < 16; y++) {
        if(image.getRGB(x, y) == new Color(209, 167, 86).getRGB()) System.out.println("Same Color Detected!");
    }
}
But image.getRGB() returns a different value to Color.getRGB(). How can I compare them?

These are some examples of the values (first digit is from image, second the colour I'm comparing):
0 : -8060928
-16777216 : -8060928
-3037354 : -8060928
-3037354 : -8060928
-16777216 : -8060928
Here's how I'm getting the image:
playerOrig = ImageIO.read(getClass().getResourceAsStream("/Player/player.gif"));
I'm using Eclipse with Java 1.6

I printed out the ColorModel of the image and got this:
IndexColorModel: #pixelBits = 4 numComponents = 4 color space = java.awt.color.ICC_ColorSpace@45d6a56e transparency = 2 transIndex   = 11 has alpha = true isAlphaPre = false
I then printed out the ColorSpace of the Color object and got this:
java.awt.color.ICC_ColorSpace@45d6a56e
Here's the image:

解决方案
Works for me ...

NOTE: well I tested the code on my local machine and it works for me just fine as you have it with the default ColorModel. I am using OSX and Java(TM) SE Runtime Environment (build 1.7.0_25-b15) Good Luck!

Here is a link to my entire Mavenized project on GitHub.com

import javax.imageio.ImageIO;
import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class Q23751298
{
    public static void main(String[] args)
    {
        try
        {
        //final BufferedImage img = ImageIO.read(new File("/Users/jhr/Pictures/fu4FM.gif"));
        final BufferedImage img = ImageIO.read(Q23751298.class.getResource("/fu4FM.gif"));
            final int match = new Color(209, 167, 86).getRGB();

            for (int x = 0; x < img.getWidth(); x++)
            {
                for (int y = 0; y < img.getHeight(); y++)
                {
                    final int irgb = img.getRGB(x, y);
                    if (irgb == match)
                    {
                        System.out.format("%d/%d = %d : %d\n", x, y, img.getRGB(x, y), match);
                    }
                }
            }
        }
        catch (IOException e)
        {
            System.out.println(e.getMessage());
        }
    }
}
Here is the output I get for the 16 X 16 file you posted:
4/9 = -3037354 : -3037354
4/10 = -3037354 : -3037354
4/11 = -3037354 : -3037354
6/4 = -3037354 : -3037354
7/4 = -3037354 : -3037354
7/5 = -3037354 : -3037354
7/6 = -3037354 : -3037354
7/7 = -3037354 : -3037354
8/4 = -3037354 : -3037354
8/5 = -3037354 : -3037354
8/6 = -3037354 : -3037354
8/7 = -3037354 : -3037354
9/4 = -3037354 : -3037354
9/7 = -3037354 : -3037354
10/5 = -3037354 : -3037354
10/6 = -3037354 : -3037354
12/10 = -3037354 : -3037354
12/11 = -3037354 : -3037354


                        
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