Author Topic: Dual ISO - massive dynamic range improvement (dual_iso.mo)  (Read 2155798 times)

a1ex

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #425 on: August 03, 2013, 07:58:58 AM »
Basically, what needs to have full detail or it's likely to get aliasing must be covered by both ISOs. In LiveView, check the exposure with both ISO values and zebras.

In these cases, less extreme settings like 100/400 should be very helpful.

arrinkiiii

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #426 on: August 03, 2013, 11:05:11 AM »
Basically, what needs to have full detail or it's likely to get aliasing must be covered by both ISOs. In LiveView, check the exposure with both ISO values and zebras.

In these cases, less extreme settings like 100/400 should be very helpful.

Indeed, thank you, will try more pic's.

I think with the silent picture burst in the 7D (the beginning of raw=) it will be more easy... if we get the ETTR working, no?

a1ex

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #427 on: August 03, 2013, 11:09:33 AM »
ETTR should be already working. Be careful though - with dual ISO it exposes for the least amount of noise and ignores moire.

hamishniven

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #428 on: August 03, 2013, 11:28:11 AM »
Awesome news.
Ok, for the dumbo here, how do I use the CR2toHDR.exe file?
Is there any documentation as I'm a photographer not a programmer.

Thanks

pit3k

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #429 on: August 03, 2013, 11:56:31 AM »
Awesome news.
Ok, for the dumbo here, how do I use the CR2toHDR.exe file?
Is there any documentation as I'm a photographer not a programmer.

Thanks

Drag and drop cr2 files to the cr2tohdr.exe.

arrinkiiii

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #430 on: August 03, 2013, 12:19:34 PM »
ETTR should be already working. Be careful though - with dual ISO it exposes for the least amount of noise and ignores moire.

Massive!!!

But do you know if the ETTR are in the new version of Pelican? For now we just got the silent burst pictures, almost 2 seconds of video.

Going post a video with that in the 7D treat.

a1ex

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #431 on: August 03, 2013, 12:23:28 PM »
If it's not, copy it from some other nightly. Modules are portable by design.

arrinkiiii

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #432 on: August 03, 2013, 12:33:33 PM »
If it's not, copy it from some other nightly. Modules are portable by design.

Alright, super duper easy  :D 


arrinkiiii

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #433 on: August 03, 2013, 03:21:10 PM »
@A1ex

I have download the 5DII ETTR module from https://bitbucket.org/a_d_/magic-lantern/downloads (the first zip file), this is correct?

Also have the autoexpo.mo, it will work in the 7D?

a1ex

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #434 on: August 03, 2013, 03:32:54 PM »
I'm experimenting with some algorithms that should handle aliasing a bit better. Here's an experimental cr2hdr: http://acoutts.com/a1ex/cr2hdr_exp.exe

Can you compare it with the one from first post? I'm interested especially in cases where the old converter gets better results.

Main difference: in aliased areas I use chroma blur (luma is no longer blurred), and the algorithm uses a stronger bias towards full-resolution mode (which is only possible in midtones, where the subject is covered by both ISOs).

Here are my before and after samples (CR2's from Danne). Click for full-res jpegs:





For 100% aliasing-free results, don't forget to cover your main subject with both ISOs. There's no other way.

Danne

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #435 on: August 03, 2013, 03:57:27 PM »
Wow! Big difference in aliasing. I,ll try some comparisons conversions soon. On the road...

a1ex

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #436 on: August 03, 2013, 05:13:32 PM »

robinlee

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #437 on: August 03, 2013, 06:11:36 PM »
Hi all, newbie here but I have done all the installations... on some test shots I've done, when viewing at 100% I can see some horizontal lines as opposed to normal exposed images. Is there any reason for this?

I tried cr2hdr.exe but seems that the converter does nothing just open and close in 1/2 secs... any thoughts?

Here is a sample, this is 100% crop, exposed to highlight to prevent pink/magenta at highlight area, dual ISO 100/1600...


_38A6284 by Robin SS Lee, on Flickr

Thanks
Robin

arrinkiiii

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #438 on: August 03, 2013, 06:29:15 PM »
Hi all, newbie here but I have done all the installations... on some test shots I've done, when viewing at 100% I can see some horizontal lines as opposed to normal exposed images. Is there any reason for this?

I tried cr2hdr.exe but seems that the converter does nothing just open and close in 1/2 secs... any thoughts?

Thanks
Robin

The lines is the interlaced ISO. You need to "de-interlaced" using cr2hdr.exe

Put the cr2hdr.exe in the same folder that your pictures. Click and drag the pictures to the cr2hdr.exe and you are done. It will create the DNG files.

Read the first post... and the rest of it.


Danne

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #439 on: August 03, 2013, 06:29:51 PM »
Keep the folder with the cr2 with no spaces, short name otherwise it won,t convert.

robinlee

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #440 on: August 03, 2013, 07:20:47 PM »
Thanks for your help arrinkiiii and Danne... :)

Shield

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #441 on: August 04, 2013, 03:30:31 AM »
Shot some raw video today and when unpacking with the raw2dng.exe it gets about halfway and then:

"Error: mallocixels"

E:\RAW\5>raw2dng m03-2004.raw
Resolution  : 1920 x 1080
Frames      : 881
Frame size  : 3629056 bytes
FPS         : 23.976
Black level : 2079
White level : 15000
Processing frame 1 of 881...
Vertical stripes correction:
  1.000  1.000  1.009  0.970  0.987  0.997  0.985  1.036

ISO pattern    : ddBB
Interpolation  : mean23-vsmooth3-contrast
ISO difference : 6.03 EV (6516)
Black delta    : 89
ISO overlap    : 3.0 EV (approx)
Processing frame 494 of 881... [HDR BBdd]Error: mallocixels]

Any ideas?

5d3, Aug 2 build.

Shield

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #442 on: August 04, 2013, 04:08:35 AM »
Figured it out - was using "Bachelor" to unpack the raw files, and it had an older version of Dcraw.exe in it.  Problem fixed.

melihozbek

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #443 on: August 04, 2013, 11:04:38 AM »
Hi, I am ashamed to ask this as a software developer, but I couldn't manage to get the modules menu on 7D.. What did I do wrong?

1. I downloaded the ML from http://upload.g3gg0.de/pub_files/17248a00956f1e932457094756b2a3ba/magiclantern_7D_203_Alpha2.zip
2. I downloaded modifications from the post #1 of this thread. ANd put modules in ML/MODULES folder.
3. I managed to get the ML Menu but no Dual Iso module, or menu.

Sorry to interrupt  :(



Danne

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #444 on: August 04, 2013, 11:51:15 AM »
There is a thread specific for the 7D. Try the search function


Canon eos m

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #446 on: August 04, 2013, 12:58:31 PM »
Quote
For 100% aliasing-free results, don't forget to cover your main subject with both ISOs. There's no other way.

@A1ex: Downloaded the ch2hdr exp version. The results are much better. Don't understand what you mean by "don't forget to cover your main subject with both ISOs"
Canon 5D Mark III, Gopro Hero Blacks with 3D Casing, A Few Lenses, Adobe CC 2014, MacBook Pro, Windows 8 PC, Lots of Video Rig!

Started Nuke. Loved it but then the 15 day trial ran out. Back to After Effects and loving it :-)

a1ex

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #447 on: August 04, 2013, 01:10:23 PM »
For full resolution and no moire, you should have detail with both ISOs.  Where one of them gets clipped, you will get half-resolution. If the subject doesn't have fine detail, half-resolution will not be noticeable; but if it has, you will get moire.

In shadows, this is less of a problem; you still have detail in both ISOs, but one of them has too much noise. That detail is usually enough to reduce aliasing, and the algorithm takes care of that. In highlights, if it's clipped, there's zero detail, so you just can't bring back the missing lines.

So, you have to be careful what is covered by both ISOs (OK) and what is covered by only one (risk of moire).

Try zebras with the higher ISO in LiveView: if the main subject is not overexposed, should be OK. Background highlights can be overexposed; if they are not too sharp (e.g. clouds), you will not see the aliasing at all.

This should also help: https://bitbucket.org/hudson/magic-lantern/commits/84d446e1e06487fdf9a6cd1e3969ac717c84651c

jaybirch

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #448 on: August 04, 2013, 01:55:18 PM »
any chance of the new algorithm working with RAW2DNG too?

Danne

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Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D
« Reply #449 on: August 04, 2013, 02:27:44 PM »
There,s a nice app here that works for mac with dual iso.
http://www.magiclantern.fm/forum/index.php?topic=7266.msg62587#msg62587