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<p><font size="2" face="Helvetica, Arial, sans-serif">Hello DigiKam
Team,</font></p>
<p><font size="2" face="Helvetica, Arial, sans-serif">Yes, If
Digikam could include a feature similar to<span
style="white-space: pre-wrap"> GIMP (JPG export dialog displays in realtime the approximate size of </span><span
style="white-space: pre-wrap">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.</span></font></p>
<p><font size="2" face="Helvetica, Arial, sans-serif"><span
style="white-space: pre-wrap">King regards,</span></font></p>
<p><font size="2" face="Helvetica, Arial, sans-serif"><span
style="white-space: pre-wrap">Michel</span></font></p>
<p><font size="2" face="Helvetica, Arial, sans-serif"><span
style="white-space: pre-wrap"> </span></font></p>
<div class="moz-cite-prefix">Le 2024-09-25 à 07:00,
<a class="moz-txt-link-abbreviated" href="mailto:digikam-users-request@kde.org">digikam-users-request@kde.org</a> a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:mailman.16.1727262002.4920.digikam-users@kde.org">
<pre class="moz-quote-pre" wrap="">Send Digikam-users mailing list submissions to
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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" <a class="moz-txt-link-rfc2396E" href="mailto:paul@paulanorman.info"><paul@paulanorman.info></a>
To: <a class="moz-txt-link-abbreviated" href="mailto:digikam-users@kde.org,Michel">digikam-users@kde.org,Michel</a> Cambron <a class="moz-txt-link-rfc2396E" href="mailto:meacambron@gmail.com"><meacambron@gmail.com></a>
Subject: Re: How to limit the weight of an image to a specified amount
of MB
Message-ID: <a class="moz-txt-link-rfc2396E" href="mailto:20C06662-8A1A-4E27-8901-1D0B23DD2065@paulanorman.info"><20C06662-8A1A-4E27-8901-1D0B23DD2065@paulanorman.info></a>
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
---
<a class="moz-txt-link-freetext" href="https://PaulANorman.info">https://PaulANorman.info</a>
On 25 September 2024 6:08:54 am NZST, Michel Cambron <a class="moz-txt-link-rfc2396E" href="mailto:meacambron@gmail.com"><meacambron@gmail.com></a> wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">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
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</pre>
</blockquote>
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Message: 2
Date: Tue, 24 Sep 2024 16:45:58 +0200
From: Remco Viëtor <a class="moz-txt-link-rfc2396E" href="mailto:remco.vietor@wanadoo.fr"><remco.vietor@wanadoo.fr></a>
To: <a class="moz-txt-link-abbreviated" href="mailto:digikam-users@kde.org">digikam-users@kde.org</a>
Subject: Re: How to limit the weight of an image to a specified amount
of MB
Message-ID: <3973337.MVzhvA4nEY@manticore>
Content-Type: text/plain; charset="UTF-8"
On mardi 24 septembre 2024 16:33:37 CEST Jonathan Kamens wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">On 9/24/24 10:30 AM, Remco Viëtor wrote:
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">(...)
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">
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
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
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 <a class="moz-txt-link-rfc2396E" href="mailto:jik@kamens.us"><jik@kamens.us></a>
To: <a class="moz-txt-link-abbreviated" href="mailto:digikam-users@kde.org">digikam-users@kde.org</a>
Subject: Re: How to limit the weight of an image to a specified amount
of MB
Message-ID: <a class="moz-txt-link-rfc2396E" href="mailto:349ccdce-6720-4de7-9c04-0853829a95a8@kamens.us"><349ccdce-6720-4de7-9c04-0853829a95a8@kamens.us></a>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
On 9/24/24 10:45 AM, Remco Viëtor wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">On mardi 24 septembre 2024 16:33:37 CEST Jonathan Kamens wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">On 9/24/24 10:30 AM, Remco Viëtor wrote:
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">(...)
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">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
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">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)...
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
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 <a class="moz-txt-link-rfc2396E" href="mailto:remco.vietor@wanadoo.fr"><remco.vietor@wanadoo.fr></a>
To: <a class="moz-txt-link-abbreviated" href="mailto:digikam-users@kde.org">digikam-users@kde.org</a>
Subject: Re: How to limit the weight of an image to a specified amount
of MB
Message-ID: <2435457.YqsbtclVHp@manticore>
Content-Type: text/plain; charset="UTF-8"
On mardi 24 septembre 2024 17:52:19 CEST Jonathan Kamens wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">On 9/24/24 10:45 AM, Remco Viëtor wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">On mardi 24 septembre 2024 16:33:37 CEST Jonathan Kamens wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">On 9/24/24 10:30 AM, Remco Viëtor wrote:
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
(...)
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">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
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
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
</pre>
</blockquote>
</blockquote>
<pre class="moz-quote-pre" wrap=""> a point where lowering the quality settings really degrade the
</pre>
<blockquote type="cite">
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">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)...
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
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
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
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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