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

[HaJo Schatz]

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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>>>>>>
>>>>>>
>>>>>
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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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-- 
-- 
Sent from my mobile device, apologies for typos

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