resize image dimesion without affecting its RGB values

[Nixil]

Hi all,

I want to change the image dimension without affecting its RGB values.
example:- as my original image dimensions are 660X650, and i want to change it into
100x150.

thanks in advance
Nixil

[mrmatt1111]

Here are the steps:

1) Load your 660X650 image into a BufferedImage
2) Create your new smaller image as a compatible BufferedImage in order to retain the same color and image settings
3) Get the Graphics object of the new image
4) Scale graphics object in order to shrink the image
5) Draw the old image to the new image

Here is a rough untested code:

int newWidth = 100;
int newHeight = 150;

//image is your 660x650 BuferedImage
Graphics2D g2d = (Graphics2D)image.getGraphics();

BufferedImage newImage = g2d.getDeviceConfiguration().createCompatibleImage(
                     newWidth , newHeight, java.awt.Transparency.OPAQUE);

g2d = (Graphics2D)newImage.getGraphics();

//i didn't test this
g2d.scale(newWidth/660.0, newHeight/650.0);

g2d.drawImage(image, 0, 0, null);

[Nixil]

Here are the steps:

1) Load your 660X650 image into a BufferedImage
2) Create your new smaller image as a compatible BufferedImage in order to retain the same color and image settings
3) Get the Graphics object of the new image
4) Scale graphics object in order to shrink the image
5) Draw the old image to the new image

Here is a rough untested code:

int newWidth = 100;
int newHeight = 150;

//image is your 660x650 BuferedImage
Graphics2D g2d = (Graphics2D)image.getGraphics();

BufferedImage newImage = g2d.getDeviceConfiguration().createCompatibleImage(
                     newWidth , newHeight, java.awt.Transparency.OPAQUE);

g2d = (Graphics2D)newImage.getGraphics();

//i didn't test this
g2d.scale(newWidth/660.0, newHeight/650.0);

g2d.drawImage(image, 0, 0, null);

Thanks mrmatt1111
but the problem not solved, it shows me blank frame.
here is the code

//My resetImage class
class resetImage extends JFrame   {
    
    scanPixel sp = new scanPixel();
    //Getting BufferedImage 640 x 600
    BufferedImage resetimage = sp.getBufferedImage();

    //reset into new width and height
    int newWidth = 400;
    int newHeight = 450;


    public resetImage() {

        setSize(newWidth,newHeight);
        setVisible(true);
    }

    public void paint(Graphics g)   {
        //your code
        
        Image img = (Image)resetimage;
        //Graphics2D g2d = (Graphics2D)g;
        Graphics2D g2d = (Graphics2D)resetimage.getGraphics();

        BufferedImage newImage = g2d.getDeviceConfiguration().createCompatibleImage(
                        newWidth , newHeight, java.awt.Transparency.OPAQUE);

        g2d = (Graphics2D)newImage.getGraphics();
        
        //i didn't test this
        g2d.scale(newWidth/sp.width, newHeight/sp.height);
        //g2d.translate(x,y); //you might need to move it to make it fit

        g2d.drawImage(newImage, 0, 0, null);

    }

}

But when i redraw the image with new drawImage and new width and height it works, but image getting is not clear.

thanks :)