Image Processing in Java – Creating a Random Pixel Image

14 Nov, 2021
Prerequisites:
Image Processing in Java – Read and Write
Image Processing In Java – Get and Set Pixels
Image Processing in Java – Colored Image to Grayscale Image Conversion
Image Processing in Java – Colored Image to Negative Image Conversion
Image Processing in Java – Colored to Red Green Blue Image Conversion
Image Processing in Java – Colored Image to Sepia Image Conversion
In this article, we will be creating a random pixel image. For creating a random pixel image, we don’t need any input image. We can create an image file and set its pixel values generated randomly.
A random image is an image in which the pixels are chosen at random, so they can take any color from the desired palette (generally 16 million colors). The resulting images look like multi-colored noise backgrounds.
Set the dimension of the new image file.Create a BufferedImage object to hold the image. This object is used to store an image in RAM.Generate random number values for alpha, red, green, and blue components.Set the randomly generated ARGB (Alpha, Red, Green, and Blue) values.Repeat steps 3 and 4 for each pixel of the image.
Set the dimension of the new image file.
Create a BufferedImage object to hold the image. This object is used to store an image in RAM.
Generate random number values for alpha, red, green, and blue components.
Set the randomly generated ARGB (Alpha, Red, Green, and Blue) values.
Repeat steps 3 and 4 for each pixel of the image.
Java
// Java program to demonstrate // creation of random pixel image  import java.io.File;import java.io.IOException;import java.awt.image.BufferedImage;import javax.imageio.ImageIO;  public class RandomImage{    public static void main(String args[])throws IOException    {        // Image file dimensions        int width = 640, height = 320;          // Create buffered image object        BufferedImage img = null;        img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);          // file object        File f = null;          // create random values pixel by pixel        for (int y = 0; y < height; y++)        {            for (int x = 0; x < width; x++)            {                  // generating values less than 256                int a = (int)(Math.random()*256);                int r = (int)(Math.random()*256);                int g = (int)(Math.random()*256);                 int b = (int)(Math.random()*256);                     //pixel                int p = (a<<24) | (r<<16) | (g<<8) | b;                   img.setRGB(x, y, p);            }        }          // write image        try        {            f = new File("C:/Users/hp/Desktop/Image Processing in Java/gfg-logo.png");            ImageIO.write(img, "png", f);        }        catch(IOException e)        {            System.out.println("Error: " + e);        }    }}
Note: Code will not run on online ide since it writes image in drive.
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nishkarshgandhi
Image-Processing
Java
Java
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