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Author Topic: Dual ISO - massive dynamic range improvement (dual_iso.mo)  (Read 2222942 times)

a1ex

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Re: Dual ISO - massive dynamic range improvement
« Reply #800 on: August 28, 2013, 08:04:09 PM »
To delete it: exiftool -UniqueCameraModel= foo.dng
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #801 on: August 28, 2013, 08:09:30 PM »
And ... the specific tag was added back...

The previous cr2hdr exe did not set this tag to Canikon though...
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #802 on: August 28, 2013, 08:10:04 PM »
Quote from: a1ex on August 28, 2013, 08:04:09 PM
To delete it: exiftool -UniqueCameraModel= foo.dng
Yes, thanks I have deleted and it displayed: Digital Negative

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a1ex

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Re: Dual ISO - massive dynamic range improvement
« Reply #803 on: August 28, 2013, 08:12:09 PM »
100% sure it did.

The question is: what value is best? There was a guy who said there are differences in output caused by this tag.
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #804 on: August 28, 2013, 08:14:13 PM »
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a.d.

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Re: Dual ISO - massive dynamic range improvement
« Reply #805 on: August 28, 2013, 08:18:33 PM »
cr2hdr from this morning still showed hot pixel in dark black area, but the latest cr2hdr works great. :D
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X-RAY

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Re: Dual ISO - massive dynamic range improvement
« Reply #806 on: August 28, 2013, 08:19:17 PM »
@ Alex
I tried to process my file through the old and the new cr2hdr on the exact same path directly under the root directory. Also with and without the exiftool.
But nothing changes ... in the old DNG are all camera profiles listed and in the new DNG only the "Embedded".

And the sun looks more pleasant on the "Adobe Standard" camera profile. Of course I know that a camera profile is just a "look" but I don't know if that was intended.

https://dl.dropboxusercontent.com/u/35226956/DualIso/DUAL4390_OLD.DNG
https://dl.dropboxusercontent.com/u/35226956/DualIso/DUAL4390_NEW.DNG
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #807 on: August 28, 2013, 08:19:41 PM »
Quote from: a1ex on August 28, 2013, 08:12:09 PM
100% sure it did.

The question is: what value is best? There was a guy who said there are differences in output caused by this tag.
I wonder: in the previous version had you just copied the camera model in this tag?

Do Adobe created DNGs have this tag or not?

Having the same value as the camera model however seems to display the same that ACR's displays for .CR2 files
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a1ex

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Re: Dual ISO - massive dynamic range improvement
« Reply #808 on: August 28, 2013, 08:56:19 PM »
Maybe it's this? http://www.magiclantern.fm/forum/index.php?topic=7139.msg62068#msg62068

@X-RAY: exiftool is not working for you.

Updated cr2hdr to set UniqueCameraModel to the real thing. Make sure exiftool is working.
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #809 on: August 28, 2013, 09:45:31 PM »
It works fine regarding UniqueCameraModel  :)
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Greg

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Re: Dual ISO - massive dynamic range improvement
« Reply #810 on: August 28, 2013, 09:48:27 PM »
Quote from: a1ex on August 28, 2013, 08:56:19 PM
Updated cr2hdr to set UniqueCameraModel to the real thing. Make sure exiftool is working.

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Kuvaldoff

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Re: Dual ISO - massive dynamic range improvement
« Reply #811 on: August 28, 2013, 11:48:34 PM »
IMHO, the best way to open and convert DNG, is Luminance HDR - "Open HDR image".
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a59192

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Re: Dual ISO - massive dynamic range improvement
« Reply #812 on: August 29, 2013, 01:10:35 AM »
Quote from: Greg on August 27, 2013, 08:29:53 PM
You need to compile the module from the repository.


Canon dual iso without moire? ;)
http://image-sensors-world.blogspot.se/2013/08/canon-files-for-dual-range-column.html


Not quite understand ~? Refers (dual_iso.c) do? I can not find 500D available module (dual_iso.mo)? Consult advanced ...
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #813 on: August 29, 2013, 04:56:50 AM »
@A1ex: 

I took again the same picture DUAL_ISO 100/1600.  I used the Aug 28 10:07 PM cr2hdr.exe version.
I quite liked this time the result NO ARTIFACTS :) (even with default sharpening!)

DUAL ISO was not necessary for that specific image but that was what I could shoot late at night at home at 5:00 AM but this is only a test!!
 
Unfortunately, I noticed white and black pixels that did not exist in original CR2.

I have sent you the raw, dng and screenshot files.
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #814 on: August 29, 2013, 12:20:33 PM »
@alex: Any chance adding back black/white pixel fixing without changing anything else? (especially the latest aliasing tweaks which proved superb)  :)

In addition, if there are interconnected issues for example if fixing something could damage something else (I am speaking generally not necessarily for this feature) maybe cr2hdr could be made to accept switches for the users to choose.
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a1ex

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Re: Dual ISO - massive dynamic range improvement
« Reply #815 on: August 29, 2013, 12:42:43 PM »
Yep, solved most of them.

A few of these white pixels are in the high-ISO images (and I only correct the ones from low ISO). With a lower setting (100/800 or 100/400) it shouldn't happen.

Also, the latest cr2hdr handles much better the files with missing or incorrect black correction info (e.g. raw video frames and those shots that were displaying a high value for "Black delta").

Here's a video frame from 6D, from nandoide:

Before / after solving black delta / after solving hot pixels, compared to cr2hdr from last week (since yesterday's one failed at black correction):

 
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #816 on: August 29, 2013, 05:12:22 PM »
@a1ex:

I have checked the latest cr2hdr (29-aug 1-17PM) and I have found sets of black and white pixels some of which look more complex (include color pixels):

https://www.dropbox.com/s/vsh84lmuihmqq1t/cr2hdr-29aug-117PM-1.JPG
https://www.dropbox.com/s/2kocv2kc6vup2p4/cr2hdr-29aug-117PM-2.JPG

EDIT: In the same DUAL0364.CR2 you already have
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a1ex

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Re: Dual ISO - massive dynamic range improvement
« Reply #817 on: August 29, 2013, 05:24:47 PM »
I'm afraid I can't solve these (they are not hot pixels, but large white patches). They are located where the high ISO is overexposed, so there's no hint whether they may be hot pixels or specular highlights.

That's what your sensor is outputting. Use less aggressive settings.
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #818 on: August 29, 2013, 05:31:23 PM »
What do you mean aggressive settings?
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #819 on: August 29, 2013, 05:36:50 PM »
You can compare with IMG_0363.CR2

Nothing aggressive...
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a1ex

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Re: Dual ISO - massive dynamic range improvement
« Reply #820 on: August 29, 2013, 05:40:50 PM »
Something like this:



ISO 100/1600 is the absolute maximum on 5D2, how's that non-aggressive?! especially at 10 seconds of exposure...

Ever tried to do a long exposure at ISO 1600? how does it look?
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #821 on: August 29, 2013, 05:44:30 PM »
You imply hot pixels?
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tron

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Re: Dual ISO - massive dynamic range improvement
« Reply #822 on: August 29, 2013, 05:46:53 PM »
I was looking at the previous .dng when I realized that I had shot at less than 1 sec.
I wonder how it will behave if I force long exposure noise reduction...
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arrinkiiii

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Re: Dual ISO - massive dynamic range improvement
« Reply #823 on: August 29, 2013, 05:47:10 PM »
What phot is that???  Aggressive !!! Me like it !!! It's water cooling ?!?!
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a1ex

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Re: Dual ISO - massive dynamic range improvement
« Reply #824 on: August 29, 2013, 05:54:52 PM »
Yeah, from here: http://stargazerslounge.com/topic/146756-1100d-cold-finger-sensor-cooling-with-tec-and-water-cooling/

Long expo NR is worth trying, since it subtracts a dark frame.

Exiftool says 10 seconds for both 363 and 364.
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