Smart questions
Smart answers
Smart people
INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Member Login
Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips now!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
Join Tek-Tips
*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

LINK TO THIS FORUM!

Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

Tek-Tips LinkedIn® Group

Partner With Us!

"Best Of Breed" Forums Add Stickiness To Your Site
Partner Button
(Download This Button Today!)

Feedback

"...I've gotten solutions within a day - it saved a lot of time and actually got me one ATTABOY from my boss..."
More...

Geography

Where in the world do Tek-Tips members come from?
Click Here To Find Out!

Tek-Tips Shirts!

Get Tek-Tips Swag
Get your
Tek-Tips Forums
SWAG here!
Home > Forums > Programmers > Graphics and Publishing > NewTek solutions Forum

BufferedImage display vs memory operations problems.

thread327-1024705
Read More Threads Like This One
prmckee (Programmer)
15 Mar 05 5:06
Having some problems when working with BufferedImages.

The problem:
If I load a greyscale BufferedImage from a JPG on disk using

CODE

currImage = ImageIO.read( this.currentImageFile);
and display it on a JPanel using

CODE

    // Draw image on the current graphics context
            Graphics2D g2Start = (Graphics2D)this.panDisplayStart.getGraphics();
            g2Start.drawImage(ImageHandling.toBufferedImage(startImage),
                    null,
                    this.getCenteringPoints(startImage).x,
                    this.getCenteringPoints(startImage).y);
I can now alter this image, say desiderate it as follows:-

CODE

private void brightenDarken(BufferedImage anBuffImage, int aScaleFactor){
        float scaleFactor, tempFactor;
        tempFactor = (float)aScaleFactor;
        if(aScaleFactor >= 0)
            scaleFactor = (tempFactor/100) + 1;
        else
            scaleFactor = (tempFactor/100) * -1;
        
        RescaleOp op = new RescaleOp(scaleFactor, 0, null);
        finnishImage = op.filter(anBuffImage, null);        
        this.repaint();
    }
Everything goes fine, this image is altered as expected.
BUT, if I do not first display this image, but load it into memory, and apply the same transformation in memory, when I display the image it is all bright reds and blues?

Can anyone help, I have a feeling this it might be something to do with the imageType property or perhaps the colorModel.

I’m on a tight deadline on this one, and any help or suggestions would be really appreciated.
Read More Threads Like This One

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Back To Forum

Back To NewTek solutions

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close