Hello,
I tested Dual ISO (with ETTR) on my 50D.
All pictures I am going to show are not altered, just developed with PS CC 2014, shrunk and saved as jpeg - but they show the problem.
First, a comparison shot without Dual ISO:
http://666kb.com/i/cqwk1wtjxwozsfw9n.jpg
I think in this lighting situation Dual ISO should show an improvement.
The next picture is how the unprocessed CR2 looked:
http://666kb.com/i/cqwk2aoz86pp68f8b.jpg
Seems normal, interlaced and all...
And this is how the resulting DNG after conversion looks:
http://666kb.com/i/cqwk2jgwfl1mw62aj.jpg
Compared to the examples for Dual ISO I don't see any improvement.
I used
- dcraw 9.19 from OSX_cr2hdr.zip
- exiftool from OSX_cr2hdr.zip
- cr2hdr.app 2.0 from from OSX_cr2hdr_app.zip
Logfile:
Any ideas if something went wrong or did I misunderstand something?
I tested Dual ISO (with ETTR) on my 50D.
All pictures I am going to show are not altered, just developed with PS CC 2014, shrunk and saved as jpeg - but they show the problem.
First, a comparison shot without Dual ISO:
http://666kb.com/i/cqwk1wtjxwozsfw9n.jpg
I think in this lighting situation Dual ISO should show an improvement.
The next picture is how the unprocessed CR2 looked:
http://666kb.com/i/cqwk2aoz86pp68f8b.jpg
Seems normal, interlaced and all...
And this is how the resulting DNG after conversion looks:
http://666kb.com/i/cqwk2jgwfl1mw62aj.jpg
Compared to the examples for Dual ISO I don't see any improvement.
I used
- dcraw 9.19 from OSX_cr2hdr.zip
- exiftool from OSX_cr2hdr.zip
- cr2hdr.app 2.0 from from OSX_cr2hdr_app.zip
Logfile:
Code Select
1 image files updated
cr2hdr: a post processing tool for Dual ISO images
Last update: 2f4e2df on 2013-12-02 17:45:36 UTC by alex:
cr2hdr: fix DNG compression under Windows
Active options:
--amaze-edge : use a temporary demosaic step (AMaZE) followed by edge-directed interpolation (default)
--cs2x2 : apply 2x2 chroma smoothing in noisy and aliased areas (default)
Input file : IMG_0731.CR2
Camera : Canon EOS 50D
Full size : 4832 x 3228
Active area : 4770 x 3177
White level : 12500
Black borders : 62 left, 51 top
Black level : 992
ISO pattern : dBBd GBRG
Noise levels : 6.04 19.04 20.84 6.84 (14-bit)
ISO difference : 4.04 EV (1644)
Black delta : 2.76
Dynamic range : 10.90 (+) 9.11 => 13.15 EV (in theory)
Looking for hot/cold pixels...
Hot pixels : 3393
Cold pixels : 863
AMaZE interpolation ...
Amaze took 3.60 s
Edge-directed interpolation...
Semi-overexposed: 9.85%
Deep shadows : 49.66%
Horizontal stripe fix...
Full-res reconstruction...
ISO overlap : 3.9 EV (approx)
Half-res blending...
Chroma smoothing...
Building alias map...
Filtering alias map...
Smoothing alias map...
Final blending...
Noise level : 4.31 (16-bit), ideally 4.28
Dynamic range : 13.38 EV (cooked)
Black adjust : 0
Output file : IMG_0731.DNG
Any ideas if something went wrong or did I misunderstand something?