Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #15482

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

Show key headers only | View raw

On 6/20/2012 5:23 PM, Fred Greer wrote:
> 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?
>

I am certainly no expert but I would think that a PNG file would create 
an ARGB image without any problems and I was curious what would happen.

The other option is to not even create a new image and just convert the 
one you have by putting null destination field.

-- 

Knute Johnson

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

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

csiph-web