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Groups > comp.lang.java.programmer > #15472

Re: ImageIO/BufferedImage behaving inconsistently from one day to the next.

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On Wed, 20 Jun 2012 08:39:37 -0700, Knute Johnson wrote:

> On 6/19/2012 7:31 PM, Fred Greer wrote:
>> I have code that used to work perfectly, which processes images in
>> certain ways, and today it suddenly was not working. I hadn't changed
>> the code at all. I tracked the problem down to spurious
>> IllegalArgumentExceptions being thrown by this code:
>>
>> public class ImageUtils {
>>
>>      private static float[] BLUR = {0.1111111, 0.1111111, 0.1111111,
>>                                     0.1111111, 0.1111111, 0.1111111,
>>                                     0.1111111, 0.1111111, 0.1111111}
>> ...
>>      public static BufferedImage blur (BufferedImage img) {
>>          Kernel k = new Kernel(3, 3, BLUR);
>>          ConvolveOp co = new ConvolveOp(k, ConvolveOp.EDGE_NO_OP,
>>          null); BufferedImage dest = new BufferedImage(img.getWidth(),
>>              img.getHeight(),img.getType());
> 
> Please try just putting BufferedImage.TYPE_INT_ARGB here instead of
> getting the type from the other image and tell us what happens.

Are 32-bit PNGs loaded via ImageIO.read guaranteed to be ARGB, or at 
least compatible with ARGB destination images for the purposes of 
ConvolveOp and friends?

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Thread

ImageIO/BufferedImage behaving inconsistently from one day to the next. Fred Greer <fggreer@nospam.invalid> - 2012-06-20 02:31 +0000
  Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. markspace <-@.> - 2012-06-19 19:38 -0700
    Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Fred Greer <fggreer@nospam.invalid> - 2012-06-20 03:07 +0000
  Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. markspace <-@.> - 2012-06-19 20:22 -0700
    Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. "John B. Matthews" <nospam@nospam.invalid> - 2012-06-20 14:26 -0400
  Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Patricia Shanahan <pats@acm.org> - 2012-06-19 20:38 -0700
    Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Fred Greer <fggreer@nospam.invalid> - 2012-06-20 04:08 +0000
  Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Roedy Green <see_website@mindprod.com.invalid> - 2012-06-20 01:16 -0700
    Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Joerg Meier <joergmmeier@arcor.de> - 2012-06-20 11:44 +0200
    Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Fred Greer <fggreer@nospam.invalid> - 2012-06-21 00:22 +0000
  Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Knute Johnson <nospam@knutejohnson.com> - 2012-06-20 08:39 -0700
    Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Fred Greer <fggreer@nospam.invalid> - 2012-06-21 00:23 +0000
      Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Knute Johnson <nospam@knutejohnson.com> - 2012-06-20 21:23 -0700
        Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Fred Greer <fggreer@nospam.invalid> - 2012-06-21 04:58 +0000
          Re: ImageIO/BufferedImage behaving inconsistently from one day to the next. Knute Johnson <nospam@knutejohnson.com> - 2012-06-21 05:58 -0700

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