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

[Bill Ross]

PS - sRGB.pf's being compared here are on Ubuntu, which has 1.8.0.0_144 
Oracle on it.

Bill

On 9/18/17 12:58 PM, Bill Ross wrote:
> 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
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>

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