Digikam-users Digest, Vol 232, Issue 20

Wed Sep 25 13:25:09 BST 2024

Hello DigiKam Team,

Yes, If Digikam could include a feature similar toGIMP (JPG export 
dialog displays in realtime the approximate size of the exported image 
as you move the image compression-level slider) this would be useful for 
me and probably others.I often get a request to limit the size of my 
photos before submitting them to the Photo clubs.

King regards,

Michel

Le 2024-09-25 à 07:00, digikam-users-request at kde.org a écrit :
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> Today's Topics:
>
>     1. Re: How to limit the weight of an image to a specified amount
>        of MB (Paul A. Norman)
>     2. Re: How to limit the weight of an image to a specified amount
>        of MB (Remco Viëtor)
>     3. Re: How to limit the weight of an image to a specified amount
>        of MB (Jonathan Kamens)
>     4. Re: How to limit the weight of an image to a specified amount
>        of MB (Remco Viëtor)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 25 Sep 2024 02:38:02 +1200
> From: "Paul A. Norman"<paul at paulanorman.info>
> To:digikam-users at kde.org,Michel  Cambron<meacambron at gmail.com>
> Subject: Re: How to limit the weight of an image to a specified amount
> 	of MB
> Message-ID:<20C06662-8A1A-4E27-8901-1D0B23DD2065 at paulanorman.info>
> Content-Type: text/plain; charset="utf-8"
>
> Dear Michel,
>
> Be aware that it could happen that if you want to fix your jpeg around a final size limit like 2mb, as you propose as a main consideration, your final output jpeg quality could vary from image to image that you process, depending upon how you achieve that limit, especially if you end up with an automated / unmonitored process.
>
> Kind regards,
> Paul
> ---
> https://PaulANorman.info
>
>
> On 25 September 2024 6:08:54 am NZST, Michel Cambron<meacambron at gmail.com>  wrote:
>> Bonjour  DigiKam Team,
>>
>> Digikam has a feature to resize the image by modifying the number of
>> pixels but is there a way to limit the final size of a jpeg ( export or
>>
>> transform) to a specified limit, example limit the size at 2.0 MB ?
>>
>> I am using version 8.4 on Window 11.
>>
>> Best regards,
>>
>> Michel
>>
>>
>>
>> -- 
>> Cet e-mail a été vérifié par le logiciel antivirus d'Avast.
>> www.avast.com
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> ------------------------------
>
> Message: 2
> Date: Tue, 24 Sep 2024 16:45:58 +0200
> From: Remco Viëtor<remco.vietor at wanadoo.fr>
> To:digikam-users at kde.org
> Subject: Re: How to limit the weight of an image to a specified amount
> 	of MB
> Message-ID: <3973337.MVzhvA4nEY at manticore>
> Content-Type: text/plain; charset="UTF-8"
>
> On mardi 24 septembre 2024 16:33:37 CEST Jonathan Kamens wrote:
>> On 9/24/24 10:30 AM, Remco Viëtor wrote:
>>
> (...)
>> The GIMP JPG export dialog displays in realtime the approximate size of
>> the exported image as you move the image compression level slider, so it
>> is apparently possible to at least estimate how big the an image is
>> going to be when saved at a particular level even before you do the
>> actual export.
>>
>>     jik
>>
> But note the "approximate" in there. That means you can end up with a file
> that is larger, and some systems reject files that are too large. And there is
> a point where lowering the quality settings really degrade the image.
>
> And I've seen files which were up to twice as big as others with the same
> quality settings (and for the same image size in pixels)...
>
>
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Tue, 24 Sep 2024 11:52:19 -0400
> From: Jonathan Kamens<jik at kamens.us>
> To:digikam-users at kde.org
> Subject: Re: How to limit the weight of an image to a specified amount
> 	of MB
> Message-ID:<349ccdce-6720-4de7-9c04-0853829a95a8 at kamens.us>
> Content-Type: text/plain; charset="utf-8"; Format="flowed"
>
> On 9/24/24 10:45 AM, Remco Viëtor wrote:
>> On mardi 24 septembre 2024 16:33:37 CEST Jonathan Kamens wrote:
>>> On 9/24/24 10:30 AM, Remco Viëtor wrote:
>> (...)
>>> The GIMP JPG export dialog displays in realtime the approximate size of
>>> the exported image as you move the image compression level slider, so it
>>> is apparently possible to at least estimate how big the an image is
>>> going to be when saved at a particular level even before you do the
>>> actual export.
>>>
>>>      jik
>> But note the "approximate" in there. That means you can end up with a file
>> that is larger, and some systems reject files that are too large. And there is
>> a point where lowering the quality settings really degrade the image.
>>
>> And I've seen files which were up to twice as big as others with the same
>> quality settings (and for the same image size in pixels)...
> Notwithstanding all of this, it is still a useful feature that people want.
>
> I doubt you're telling anybody here anything they don't already know.
>
> Gilles has already replied in this thread and made it clear that he has
> no particular objection to the proposed functionality, so I'm not really
> sure why you feel compelled to continue to spread F.U.D. about it.
>
>     jik
>
>
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> ------------------------------
>
> Message: 4
> Date: Tue, 24 Sep 2024 18:24:07 +0200
> From: Remco Viëtor<remco.vietor at wanadoo.fr>
> To:digikam-users at kde.org
> Subject: Re: How to limit the weight of an image to a specified amount
> 	of MB
> Message-ID: <2435457.YqsbtclVHp at manticore>
> Content-Type: text/plain; charset="UTF-8"
>
> On mardi 24 septembre 2024 17:52:19 CEST Jonathan Kamens wrote:
>> On 9/24/24 10:45 AM, Remco Viëtor wrote:
>>
>>> On mardi 24 septembre 2024 16:33:37 CEST Jonathan Kamens wrote:
>>>
>>>> On 9/24/24 10:30 AM, Remco Viëtor wrote:
>>> (...)
>>>
>>>> The GIMP JPG export dialog displays in realtime the approximate size of
>>>> the exported image as you move the image compression level slider, so it
>>>> is apparently possible to at least estimate how big the an image is
>>>> going to be when saved at a particular level even before you do the
>>>> actual export.
>>>>
>>>>
>>>>
>>>>      jik
>>> But note the "approximate" in there. That means you can end up with a
>>> file
>>> that is larger, and some systems reject files that are too large. And
>>> there is
>   a point where lowering the quality settings really degrade the
>>> image.>
>>>
>>>
>>> And I've seen files which were up to twice as big as others with the same
>>> quality settings (and for the same image size in pixels)...
>>
>> Notwithstanding all of this, it is still a useful feature that people want.
>>
>> I doubt you're telling anybody here anything they don't already know.
>>
>> Gilles has already replied in this thread and made it clear that he has
>> no particular objection to the proposed functionality, so I'm not really
>> sure why you feel compelled to continue to spread F.U.D. about it.
>>
>>     jik
>>
>>
> If you want to call it F.U.D., fine with me.
>
> Thing is, there are enough applications where a file cannot exceed a certain
> size. Having an approximate size before saving is nice, *as long as you know
> the limitations of that approximation*. And if you know what happens when you
> keep lowering the quality level...
>
> It's not hard to check the exact size straight after saving, it's a lot more
> time-consuming having to redo the export because a bit later you discover that
> the saved file is just a bit too large (e.g. because metadata were added).
>
>
>
>
>
>
>
>
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>
> End of Digikam-users Digest, Vol 232, Issue 20
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