pdfbox-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Derwent Ready <drents...@gmail.com>
Subject Re: Custom ICC Profiles
Date Mon, 05 Jun 2017 21:30:33 GMT
OK thanks,

I guess it's me being overly judgemental of my design or something. Thanks
for the help.

On 5 June 2017 at 14:36, Tilman Hausherr <THausherr@t-online.de> wrote:

> Hi,
>
> I did the comparison that I mentioned and the renderings are identical. I
> do see a slight difference in your dropbox images but this goes away when
> moving my head, i.e. the difference is due to screen angle.
>
> Colorspaces can appear at many places, in the content stream, in images,
> shadings, resources...  I had a quick look at your file with PDFDebugger
> and it uses ICC colorspaces.
>
> Tilman
>
>
> Am 05.06.2017 um 13:49 schrieb Derwent Ready:
>
>> Hi,
>>
>> Thanks for the quick response. I just tried your code and put the outputs
>> from Indesign, Photoshop RGB/CYMK, PDFBox default and PDFBox using the
>> SWOP
>> profile next to each other and yes there is definitely a difference so
>> thanks for that. :)
>> The SWOP is definitely closer to the Photoshop versions than the PDFBox
>> default. This is more noticeable on one set of images than another.
>>
>> I've linked a couple of images in a dropbox link that show the
>> differences.
>> On the first image (purple) the difference is minimal but on the second
>> (orange) the gradients are really quite different. I'm not sure if this is
>> a PDFBox issue or a profile issue or what.
>> https://www.dropbox.com/sh/e80qn8qa2s2ad56/AAA0qKuhAjXeP0e2Qe2AXmFea?dl=0
>>
>> How would I check that the file has DeviceCYMK colourspace? I've included
>> a
>> blank version of the PDF in the dropbox folder.
>>
>> Thanks again,
>>
>> D
>>
>> On 5 June 2017 at 10:40, Tilman Hausherr <THausherr@t-online.de> wrote:
>>
>> Here's what worked for me, I used it in my rendering tests which detect
>>> differences:
>>>
>>>          PDDeviceCMYK.INSTANCE = new PDDeviceCMYK()
>>>          {
>>>              @Override
>>>              protected ICC_Profile getICCProfile() throws IOException
>>>              {
>>>                  return ICC_Profile.getInstance("USWebCoatedSWOP.icc");
>>>              }
>>>          };
>>>
>>> The results are definitively different.
>>>
>>> If you have a test file, I could render it with and without the change
>>> and
>>> check whether it is different or not. Maybe your file doesn't have the
>>> /DeviceCMYK colorspace but something else?
>>>
>>> Tilman
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@pdfbox.apache.org
>>> For additional commands, e-mail: users-help@pdfbox.apache.org
>>>
>>>
>>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@pdfbox.apache.org
> For additional commands, e-mail: users-help@pdfbox.apache.org
>
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message