[OpenJDK 2D-Dev] ImageIO.read(jpeg): different RGB from OpenJDK and Oracle Java

[Bill Ross]

Thanks!

 > I expect the sRGB.pf one is the one that matters.

Definitely a difference in that file (sizes):

6876  /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/cmm/sRGB.pf
3144  /usr/lib/jvm/java-8-oracle/jre/lib/cmm/sRGB.pf

Swapping cmm dirs leads to identical results.

Is there any rationale documented/known for choosing one over the other?

 > Is that referring to 8u60 vs 8u131 ?

That's what the version numbers seem to indicate.

Bill

On 9/18/17 9:15 AM, Phil Race wrote:
> Hi,
>
> is there a question here ?
>
> > If this is the only diff
>
> Is that referring to 8u60 vs 8u131 ?
>
> FWIW I think the difference that matters is that OpenJDK has different 
> colour profile files,
> so even though they are processed by the same code the results may be 
> different.
>
> I expect the sRGB.pf one is the one that matters.
>
> -phil.
>
> On 09/17/2017 03:08 PM, Bill Ross wrote:
>>
>> If this is the only diff between the Java's involved here, it is 
>> interesting that it is sufficient to switch photo pair distances from 
>> Group 2 to Group 3 in the interpretation of the histograms as 
>> coordinates in Poincare spherical space.
>>
>> > Bigger picture: http://phobrain.com/pr/home/poincaredesc.html
>>
>> Bill
>>
>> On 9/17/17 2:59 PM, Bill Ross wrote:
>>>
>>> Sorry, where are my manners:
>>>
>>> Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
>>> Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)
>>>
>>> openjdk version "1.8.0_131"
>>> OpenJDK Runtime Environment (build 
>>> 1.8.0_131-8u131-b11-2ubuntu1.16.04.3-b11)
>>> OpenJDK 64-Bit Server VM (build 25.131-b11, mixed mode)
>>>
>>> Bill
>>>
>>>
>>> On 9/17/17 2:55 PM, Bill Ross wrote:
>>>> http://phobrain.com/pr/home/gallery/img2112a.jpg
>>>>
>>>> Example RGB diff between OpenJDK and Oracle; 673/58903 pixels 
>>>> differ, often by 1, but also like this:
>>>>
>>>> 43480c43480
>>>>
>>>> < -9876933
>>>>
>>>> ---
>>>>
>>>> > -9942469
>>>>
>>>> 43491c43491
>>>>
>>>> < -9876931
>>>>
>>>> ---
>>>>
>>>> > -9942467
>>>>
>>>> --------
>>>>
>>>>     BufferedImage buffered = ImageIO.read("img2112a.jpg");
>>>>
>>>>     try {
>>>>         PrintStream out = new PrintStream(new File("pixels_2112"));
>>>>         for (int i=0; i<buffered.getWidth(); i++) {
>>>>             for (int j=0; j<buffered.getHeight(); j++) {
>>>>                 out.println("" + buffered.getRGB(i, j));
>>>>             }
>>>>
>>>>         }
>>>>         out.close();
>>>>     } catch (Exception e) {
>>>>         e.printStackTrace();
>>>>     }
>>>>
>>>> As discovered in BoofCV: 
>>>> https://groups.google.com/forum/#!topic/boofcv/b40hIlt8Cz0
>>>>
>>>> Bigger picture:
>>>>
>>>> http://phobrain.com/pr/home/poincaredesc.html
>>>>
>>>> Bill Ross
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.openjdk.java.net/pipermail/2d-dev/attachments/20170918/1222ef74/attachment.html>