[Digikam-users] How to stop "watermark" reducing the size of the pictures?

[Jan Wolter]

I only remaining idea I have, is to send us a link to your picture and 
then we can try, if we get the same results.

On 08/28/2014 08:30 PM, cerp wrote:
> mmmm .... there seems to be quite some degradation .... the camera is 
> a recent professional grade camera, with up to date firmware. Standard 
> software like silkypix or lighzone do not seem to affect the size of 
> the files  .... it does not seem to be the case.
>
>
> Quoting HaJo Schatz <hajo at hajo.net>:
>
>> I'm guessing -- and only guessing -- that the cam might have limited
>> processing power and hence doesn't compress the JPEG as well as is
>> possible. The PC might have far more computing power and hence produce a
>> way smaller file (through better compression, not by degredation of
>> quality). What happened if you converted the 4.8MB file to say a PNG?
>>
>> On Thursday, August 28, 2014, cerp <cerp at eeos.biz> wrote:
>>
>>>
>>> There seems to be a reduction of quality.
>>>
>>> Why, what are you thinking of?
>>>
>>> Best
>>>
>>>
>>> Quoting HaJo Schatz <hajo at hajo.net>:
>>>
>>>  Is there really a loss of quality or only a reduction of size?
>>>>
>>>> On Thursday, August 28, 2014, cerp <cerp at eeos.biz> wrote:
>>>>
>>>>  No, digikam still reduces the pictures from 4.8Mb to 1.8 Mb, with the
>>>>> consequent loss of quality / details. It happens not only when I 
>>>>> apply
>>>>> watermark but any other batch tool.
>>>>>
>>>>> Quoting Jan Wolter <jan.wolter at uni-paderborn.de>:
>>>>>
>>>>> Yes, thats true. Does this settings have a positive impact to the 
>>>>> quality
>>>>>
>>>>>> of your edited pictures?
>>>>>>
>>>>>> On 08/28/2014 12:11 PM, cerp wrote:
>>>>>>
>>>>>>
>>>>>>> Dear Jan,
>>>>>>>
>>>>>>> I have set JPEG quality = 100 and chroma sub sampling = none, that
>>>>>>> should be maximum quality correct?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Quoting Jan Wolter <jan.wolter at uni-paderborn.de>:
>>>>>>>
>>>>>>> Hello,
>>>>>>>
>>>>>>>>
>>>>>>>> I guess that your images are generally (independent from the added
>>>>>>>> watermark) not saved with maximal quality. Check your settings 
>>>>>>>> under
>>>>>>>> menu
>>>>>>>> Settings -> Configure digiKam -> Saving Images.
>>>>>>>>
>>>>>>>> Best regards,
>>>>>>>> Jan
>>>>>>>>
>>>>>>>> On 08/28/2014 09:43 AM, cerp wrote:
>>>>>>>>
>>>>>>>>  Dear all,
>>>>>>>>>
>>>>>>>>> We use the watermark function to add the copyright in the bottom
>>>>>>>>> right
>>>>>>>>> corner of the pictures.
>>>>>>>>>
>>>>>>>>> The pictures are taken using in camera jpeg generation, which
>>>>>>>>> normally
>>>>>>>>> has very high quality.
>>>>>>>>>
>>>>>>>>> When we watermark in digikam, it reduces the size of the jpeg 
>>>>>>>>> file
>>>>>>>>> from approximately 4Mb to 1.8Mb with a considerable loss of 
>>>>>>>>> quality.
>>>>>>>>> We
>>>>>>>>> have tried setting all the parameters we could think, but without
>>>>>>>>> being
>>>>>>>>> able to stop this behavior. What I would like is the original
>>>>>>>>> picture with
>>>>>>>>> the watermark saved at the same resolution without additional
>>>>>>>>> compression
>>>>>>>>> .... how do I achieve it?
>>>>>>>>>
>>>>>>>>> Thanks for your help.
>>>>>>>>>
>>>>>>>>> Regards
>>>>>>>>>
>>>>>>>>> Corrado & Rina
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> r
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> Digikam-users mailing list
>>>>>>>>> Digikam-users at kde.org
>>>>>>>>> https://mail.kde.org/mailman/listinfo/digikam-users
>>>>>>>>>
>>>>>>>>>
>>>>>>>> _______________________________________________
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>>>>>>>> Digikam-users at kde.org
>>>>>>>> https://mail.kde.org/mailman/listinfo/digikam-users
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
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>>>>>>> Digikam-users at kde.org
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>>>>>>>
>>>>>>>  _______________________________________________
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>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>
>>>> -- 
>>>> -- 
>>>> Sent from my mobile device, apologies for typos
>>>>
>>>> PGP key: http://tinyurl.com/neswujo
>>>>
>>>
>>>
>>> _______________________________________________
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>>> Digikam-users at kde.org
>>> https://mail.kde.org/mailman/listinfo/digikam-users
>>>
>>
>>
>> -- 
>> -- 
>> Sent from my mobile device, apologies for typos
>>
>> PGP key: http://tinyurl.com/neswujo
>
>
>
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