Hi Carlos,
have you tried to scale your image using drawImage with the scale
transform set? Something like:
BufferedImage dst =
new BufferedImage(newWidth, newHeight,
BufferedImage.TYPE_BYTE_INDEXED,
yourIndexedColorModel);
Graphics2D g2d = (Graphics2D)dst.getGraphics();
g2d.scale(factor, factor);
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2d.drawImage(img, 0, 0, null);
Thank you,
Dmitri
On Wed, Nov 21, 2001 at 01:27:0p -0500, Carlos Rodriguez wrote:
> Hi:
>
> I am having some trouble trying to scale an indexed color image using
> AffineTransformOp.
> I was wondering if anyone could provide me with some help or point me in the
> right direction. The code I am uing is:
>
> long factor = .25;
> AffineTransform at = new AffineTransform();
> at.setToScale(factor,factor);
> AffineTransformOp op = new AffineTransformOp(at,
> AffineTransformOp.TYPE_BILINEAR);
>
> BufferedImage res = op.filter(img, null);
> end = System.currentTimeMillis();
>
> img is an 8-bit indexed color image that I created explicitly using
> application data. It hasan IndexColorModel that I populated with the
> correct red, green and blue LUTs, and
> a DataBufferByte. The useful and informative Exception that is getting
> thrown is:
>
> java.awt.image.ImagingOpException: Unable to transform src image at
> java.awt.image.AffineTransformOp.filter(AffineTransformOp.java:258)
>
> So, can anyone tell me if AffineTransforms are even legal on indexed color
> images? I can send the image too if that will help (specify the format,
> though...)
>
> One strange thing is that if I set all LUT's to be the same (i.e, grayscale)
> everything works fine.
>
>
> Carlos M. Rodriguez, Senior Systems Engineer
> Wellogic, Inc.
> 222 Third St. Suite. 2220. Cambridge, MA 02142
>
> "Your dependence upon Moore's law is inversely
> proportional to your ability as a programmer"
> -Buzzword's Corollary to Moore's Law
>
> ===========================================================================
> To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
> of the message "signoff JAVA2D-INTEREST". For general help, send email to
> [EMAIL PROTECTED] and include in the body of the message "help".
===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff JAVA2D-INTEREST". For general help, send email to
[EMAIL PROTECTED] and include in the body of the message "help".
