The other day, I took some dual ISO photos using the officially compiled atest Lua updates + fixes 500D firmware.
When I try to export using cr2hdr, I find that the DNG resolution after export is only 384x252
(https://i.loli.net/2020/10/03/Ycs8e7rJvaW3GwR.png)
This is my log
cr2hdr: a post processing tool for Dual ISO images
Last update: ab1e90c on 2015-11-24 09:50:19 UTC by a1ex:
cr2hdr: moved safeguard from median_int_wirth to kth_smallest_i...
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)
--no-bad-pix : disable bad pixel fixing (try it if you shoot stars)
--wb=graymax : set AsShotNeutral by maximizing the number of gray pixels (default)
Input file : C:\Users\Administrator\Pictures\2020\2020-10-01\IMG_0010.CR2
Camera : Canon EOS Kiss X3 (unknown, assuming 5D Mark III)
Full size : 4832 x 3204
Active area : 4770 x 3178
Black borders : 62 left, 26 top
Black level : 1016
ISO pattern : ddBB RGGB
White levels : 13296 11974
Noise levels : 8.01 7.67 26.63 25.98 (14-bit)
ISO difference : 4.04 EV (1645)
Black delta : 4.59
Black adjust : 72
Dynamic range : 10.65 (+) 8.68 => 12.72 EV (in theory)
AMaZE interpolation ...
Amaze took 2.62 s
Edge-directed interpolation...
Semi-overexposed: 1.99%
Deep shadows : 48.05%
Horizontal stripe fix...
26: offset too large (5559)
27: offset too large (5032)
Full-res reconstruction...
ISO overlap : 3.6 EV (approx)
Half-res blending...
Chroma smoothing...
Building alias map...
Filtering alias map...
Smoothing alias map...
Final blending...
Noise level : 88.04 (20-bit), ideally 87.94
Dynamic range : 13.12 EV (cooked)
Black adjust : -78
AsShotNeutral : 0.60 1 0.66, 4727K/g=1.40 (gray max)
Output file : C:\Users\Administrator\Pictures\2020\2020-10-01\IMG_0010.DNG
C:\Users\Administrator\Pictures\2020\2020-10-01\IMG_0010.DNG: copying EXIF from C:\Users\Administrator\Pictures\2020\2020-10-01\IMG_0010.CR2
Hi
I think that shows the resolution of the embedded preview image.
I have a similar file, I took a picture from ExifPilot program
first is preview image(uncompressed RGB)
second is full size jpeg compressed raw(CFA)
both are embedded in the same DNG file
How does the DNG behave when it is opened in a raw processing program like RawTherapee?
Can you send samples?
(https://i.imgur.com/xkUaJpR.jpg)