<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html><head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'Bitstream Vera Sans'; font-size:9pt; font-weight:400; font-style:normal;">
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">"Local contrast" is adjust and optimize contrast inside local zones of a picture in order to approach human eyes perception. That's exactly what the local contrast tool in DK does. </p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; "> </p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">The tone mapping process consists in matching repartition of colors from a 32 bits picture in a 8 bits one (for instance). That's totally different, even if some tone mapping algorythms have deep influence of local contrast. </p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; "> </p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Best regards</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; "> </p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Paulux</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br /><br />Le samedi 17 mai 2014, 08:30:20 Paul Verizzo a écrit :<br /></p>
<p style=" margin-top:12px; margin-bottom:12px; margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Helvetica, Arial, sans-serif'; font-size:large;">It's Windows, Carl, and the processor is a P.O.S. dual core that was meant for a laptop, but it's in my desktop. My comment on speed was relative to the Canon program, and even the Windows Phone one. But it's fine, it is what it is, I'm just grateful for the discovery.<br /><br />On the topic, and further internet research, that the use of "Local Contrast" in dK might be a bit of a misnomer. As mentioned, in PS, the plug-in does work with local contrast, not overall tones. In fact, I'm seeing "Tone mapping" being used for what dK calls "Local Contrast." Seems to be more accurate, grammatically.<br /><br />Paul Verizzo <br /><br /></span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">On 5/17/2014 8:22 AM, Carl McGrath wrote:<br /></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Paul<br />I scanned quickly for what OS you are running but did not find it; I run openSUSE 13.1<br />dK 4.0.0 arrived a few days ago, with all the fixes Gilles reported that enable multicore.<br /><br />Local Contrast and Sharpness tools now blazing fast(by comparison)<br /><br /></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:80px; margin-right:80px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">On 05/17/2014 07:58 AM, Paul Verizzo wrote:<br /></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Helvetica, Arial, sans-serif'; font-size:large;">Wow, that's it! <br /><br />I finally had time to locate some of the lousy original photos I had successfully improved with a couple of other programs, including, oddly, that Nokia (Windows Phone) Fix. <br /><br />Putzed with dK Local Contrast, works beautifully. Just what I was after. <br /><br />I tried to find information and help in the dK PDF, but could not. Searching online, "local contrast" brings up a lot of Photoslop entries, but they necessitate using layers and unsharp mask. So much for the expensive program. If I add "digikam" to the search, I just keep getting repeats from a blog posting.<br /><br />I'd like to learn how to manually control adjustments for best results.<br /><br />Any further help to be found?<br /><br />Oh, yes. Kind of slow, but if I factor in the need to open another program, rename, shuffle files, Local Contrast is another dK winner!<br /><br />Thanks, Giles (and all others!)<br /><br />Paul <br /></span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:120px; margin-right:120px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">On 5/10/2014 12:11 PM, Gilles Caulier wrote:<br /></p>
<pre style=" margin-top:12px; margin-bottom:0px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">digiKam has LocalContrast tool which make the same correction to</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">image. In fact it emulate pseudo HDR rendering.</span></pre>
<pre style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; font-family:'Courier New,courier';"><br /></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Gilles Caulier</span></pre>
<pre style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; font-family:'Courier New,courier';"><br /></pre>
<pre style=" margin-top:0px; margin-bottom:12px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">2014-05-10 18:07 GMT+02:00 Paul Verizzo </span><a href="mailto:paulv@paulv.net"><span style=" font-family:'Courier New,courier'; text-decoration: underline; color:#0057ae;"><paulv@paulv.net></span></a><span style=" font-family:'Courier New,courier';">:</span> </pre>
<pre style=" margin-top:12px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Background: I've been in digital photography since 2000, decades of film</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">before and since. I'm certainly familiar with the use of curves to correct</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">bad photos. But so tedious, and if the photos are snapshots, hard to</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">justify the time. It appears to me, although I can't prove it, that digital</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">cameras, discrete or within phones, seem to be doing a much better job</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">automatically adjusting curves than my old Minolta A2, for instance.</span></pre>
<pre style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; font-family:'Courier New,courier';"><br /></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">I recently became aware of a new free Canon program, My Image Garden, that</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">has a much improved Auto-fix than its forerunner. As an example, a backlit</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">photo processed in MIG will bring up only the shadows while leaving the</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">normal and highlights alone. It allegedly uses a zone by zone analysis. It</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">is a terrible program in every other regard, clunky interface, bloated, etc.</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">But I used it for some recent pics to advantage.</span></pre>
<pre style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; font-family:'Courier New,courier';"><br /></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Some of those pictures were originally on my Windows Phone 8, which I had</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">copied to the HD. Before I deleted them from the phone, I poked around with</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">the options at that point. I found an auto-fix, pushed the "button," and my</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">jaw dropped. Literally. A very dark, underexposed shot made perfect! This</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">feature is within the Nokia programs! It is so good, I can see myself</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">transferring photos from other sources into the phone for correction! And</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">it's fast, even so.</span></pre>
<pre style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; font-family:'Courier New,courier';"><br /></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">I went back through the digiKam manual and looked on screen, and I see the</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">old standbys there, but nothing like what I've experienced with the above.</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Oh, upon lots of research, I found a 2007 $40 program called Photoright that</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">upon test, seems to be doing similar zone adjustments.</span></pre>
<pre style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; font-family:'Courier New,courier';"><br /></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Bottom lines: Are my observations valid? Do you think DK might get</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">something like this? Oh, yes, all Windows although MIG is available for</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Mac.</span></pre>
<pre style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; font-family:'Courier New,courier';"><br /></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Thanks, Paul Verizzo</span></pre>
<pre style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; font-family:'Courier New,courier';"><br /></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">_______________________________________________</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Digikam-users mailing list</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><a href="mailto:Digikam-users@kde.org"><span style=" font-family:'Courier New,courier'; text-decoration: underline; color:#0057ae;">Digikam-users@kde.org</span></a></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><a href="https://mail.kde.org/mailman/listinfo/digikam-users"><span style=" font-family:'Courier New,courier'; text-decoration: underline; color:#0057ae;">https://mail.kde.org/mailman/listinfo/digikam-users</span></a></pre>
<pre style=" margin-top:0px; margin-bottom:12px; margin-left:200px; margin-right:200px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"> </pre>
<pre style=" margin-top:12px; margin-bottom:0px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">_______________________________________________</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Digikam-users mailing list</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><a href="mailto:Digikam-users@kde.org"><span style=" font-family:'Courier New,courier'; text-decoration: underline; color:#0057ae;">Digikam-users@kde.org</span></a></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><a href="https://mail.kde.org/mailman/listinfo/digikam-users"><span style=" font-family:'Courier New,courier'; text-decoration: underline; color:#0057ae;">https://mail.kde.org/mailman/listinfo/digikam-users</span></a></pre>
<pre style=" margin-top:0px; margin-bottom:12px; margin-left:160px; margin-right:160px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"> <br /><br /><br /></pre>
<pre style=" margin-top:12px; margin-bottom:0px; margin-left:120px; margin-right:120px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">_______________________________________________</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:120px; margin-right:120px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Digikam-users mailing list</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:120px; margin-right:120px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><a href="mailto:Digikam-users@kde.org"><span style=" font-family:'Courier New,courier'; text-decoration: underline; color:#0057ae;">Digikam-users@kde.org</span></a></pre>
<pre style=" margin-top:0px; margin-bottom:12px; margin-left:120px; margin-right:120px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><a href="https://mail.kde.org/mailman/listinfo/digikam-users"><span style=" font-family:'Courier New,courier'; text-decoration: underline; color:#0057ae;">https://mail.kde.org/mailman/listinfo/digikam-users</span></a> <br /><br /><br /></pre>
<pre style=" margin-top:12px; margin-bottom:0px; margin-left:80px; margin-right:80px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">_______________________________________________</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:80px; margin-right:80px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'Courier New,courier';">Digikam-users mailing list</span></pre>
<pre style=" margin-top:0px; margin-bottom:0px; margin-left:80px; margin-right:80px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><a href="mailto:Digikam-users@kde.org"><span style=" font-family:'Courier New,courier'; text-decoration: underline; color:#0057ae;">Digikam-users@kde.org</span></a></pre>
<pre style=" margin-top:0px; margin-bottom:12px; margin-left:80px; margin-right:80px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><a href="https://mail.kde.org/mailman/listinfo/digikam-users"><span style=" font-family:'Courier New,courier'; text-decoration: underline; color:#0057ae;">https://mail.kde.org/mailman/listinfo/digikam-users</span></a> <br /></pre>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br /></p></body></html>