Java 如何在数组中存储每个像素的 rgb 值
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How to store rgb values of each pixel in array
提问by ark
I have this code, in which I extracted the value of RGB for each pixel, but I'm wondering how to store each RGB value in an array so that I can use it further in my project. I want to take these stored RGB values as an input for backpropagation algorithm.
我有这段代码，其中我提取了每个像素的 RGB 值，但我想知道如何将每个 RGB 值存储在一个数组中，以便我可以在我的项目中进一步使用它。我想将这些存储的 RGB 值作为反向传播算法的输入。
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import java.awt.Color;
import java.util.ArrayList;
import java.util.List;
public class PrintImageARGBPixels
{
public static void main(String args[])throws IOException
{
BufferedImage image = ImageIO.read(new File("C:\Users\ark\Desktop\project_doc\logo_1004.jpg"));
int r=0,g=0,b=0;
int w = image.getWidth();
int h = image.getHeight();
System.out.println("Image Dimension: Height-" + h + ", Width-"+ w);
int total_pixels=(h * w);
ArrayList <Color> arr = new ArrayList<Color>();
for(int x=0;x<w;x++)
{
for(int y=0;y<h;y++)
{
int rgb = image.getRGB(x, y);
Color c = new Color(rgb);
r=c.getRed();
g=c.getGreen();
b=c.getBlue();
}
}
Color co = new Color(r,g,b);
arr.add(co);
for(int i=0;i<total_pixels;i++)
System.out.println("Element 1"+i+1+", color: Red " + arr.get(i).getRed() + " Green +arr.get(i).getGreen()+ " Blue " + arr.get(i).getBlue());
}
}
采纳答案by Husman
// Store the color objects in an array
int total_pixels = (h * w);
Color[] colors = new Color[total_pixels];
int i = 0;
for (int x = 0; x < w; x++)
{
for (int y = 0; y < h; y++)
{
colors[i] = new Color(image.getRGB(x, y));
i++;
}
}
// Later you can retrieve them
for (int i = 0; i < total_pixels; i++)
{
Color c = colors[i];
int r = c.getRed();
int g = c.getGreen();
int b = c.getBlue();
System.out.println("Red" + r + "Green" + g + "Blue" + b);
}
IGNORE THE BELOW, it is my old answer
忽略下面，这是我的旧答案
Use a multidimensional array:
使用多维数组：
[
[255, 255, 255],
[108, 106, 107],
[100, 100, 55],
...
]
You can then refer to each pixel, [0][x] to get the colour values.
然后，您可以参考每个像素 [0][x] 来获取颜色值。
回答by Marcel Ehrlitzer
Why don't you just create a RGB Object like this
你为什么不像这样创建一个 RGB 对象
public class RGB {
private int R, G, B;
public RGB(int R, int G, int B){
this.R = R;
this.G = G;
this.B = B;
}
public int getR() {
return R;
}
public void setR(int r) {
R = r;
}
public int getG() {
return G;
}
public void setG(int g) {
G = g;
}
public int getB() {
return B;
}
public void setB(int b) {
B = b;
}
}
So you can store RGB Objects in your array to use them later.
因此，您可以将 RGB 对象存储在您的数组中以供以后使用。
Greetings!
你好！
回答by Lucas
It can be achieved easier with HashMap, where Key is an int[] (x and y) and value is the another int[] (r, g, b).
使用 HashMap 可以更容易地实现，其中 Key 是一个 int[]（x 和 y），而 value 是另一个 int[]（r、g、b）。
