Create a buffered image from rgb pixel values

I have an integer array of RGB pixels that looks something like:

pixels[0] = <rgb-value of pixel(0,0)>
pixels[1] = <rgb-value of pixel(1,0)>
pixels[2] = <rgb-value of pixel(2,0)>
pixels[3] = <rgb-value of pixel(0,1)>
...etc...

And I'm trying to create a BufferedImage from it. I tried the following:

BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
img.getRaster().setPixels(0, 0, width, height, pixels);

But the resulting image has problems with the color bands. The image is unclear a开发者_StackOverflow社区nd there are diagonal and horizontal lines through it.

What is the proper way to initialize the image with the rgb values?

EDIT: Here is what my image looks like

thanks, Jeff

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Try setDataElements instead of setPixels.

Another option is for the image to share the array instead of copying from it (see this answer for an example.)

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Not sure how to do it with a single array value. I believe you need three array values to specify the color when you use TYPE_INT_RGB:

import java.awt.*;
import java.awt.image.*;
import javax.swing.*;

public class ImageFromArray2 extends JFrame
{
    int width = 50;
    int height = 50;
    int imageSize = width * height;

    public ImageFromArray2()
    {
        JPanel panel = new JPanel();
        getContentPane().add( panel );
        int[] pixels = new int[imageSize * 3];

        //  Create Red Image

        for (int i = 0; i < imageSize * 3; i += 3)
        {
            pixels[i] = 255;
            pixels[i+1] = 0;
            pixels[i+2] = 0;
        }

        panel.add( createImageLabel(pixels) );

        //  Create Green Image

        for (int i = 0; i < imageSize * 3; i += 3)
        {
            pixels[i] = 0;
            pixels[i+1] = 255;
            pixels[i+2] = 0;
        }

        panel.add( createImageLabel(pixels) );

        //  Create Blue Image

        for (int i = 0; i < imageSize * 3; i += 3)
        {
            pixels[i] = 0;
            pixels[i+1] = 0;
            pixels[i+2] = 255;
        }

        panel.add( createImageLabel(pixels) );

        //  Create Cyan Image

        for (int i = 0; i < imageSize * 3; i += 3)
        {
            pixels[i] = 0;
            pixels[i+1] = 255;
            pixels[i+2] = 255;
        }

        panel.add( createImageLabel(pixels) );

    }

    private JLabel createImageLabel(int[] pixels)
    {
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        WritableRaster raster = image.getRaster();
        raster.setPixels(0, 0, width, height, pixels);
        JLabel label = new JLabel( new ImageIcon(image) );
        return label;
    }

    public static void main(String args[])
    {
        JFrame frame = new ImageFromArray2();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo( null );
        frame.setVisible( true );
    }
}

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The reason you cant get the correct image is that those pixels include the rgb colors, in order to set well each pix you most do the next

double[] pixelsArr=new double[4];
pixelsArr[0]=(Integer.parseInt(string2.trim())>>16) & 0xFF;
pixelsArr[1]=(Integer.parseInt(string2.trim())>>8) & 0xFF;
pixelsArr[2]=(Integer.parseInt(string2.trim())) & 0xFF;
pixelsArr[3]=0xFF;
img.getRaster().setPixels(col,row,1,1, pixelsArr);

string2 is an integer pixel col is the position of each pix and row the same, and 1,1 is the size of each pixel.