Originally posted by biz-engineer Ahhh, the famous four frames in one pixel shift file. At ISO100, all standard pixel shift processing are flawed, except if the output would be 16bit deep or 144Mpixels large, because 4 frames at 14bits depth (iso100) per pixel yield 2 addition bits of info (14+2=>16bits). So for the extra information collected by pixel shift not to be lost, we should use either 16bits deep TIF over 36Mp (K1) or 8bits deep TIF/JPEG over 144Mp. Up-scaling to 144Mp directly from RAW PS deliver substantially higher quality. So maybe PS2DNG remaps DNG 14bits to DNG 16bits?
The bit depth doesn't increase by using pixelshift. Pixelshift increases the accuracy of the pixels, the correctness of each bit.
A camera could theoretically output 20bit deep noise or interpolated values with only 4bit accurate data?
---------- Post added 04-13-20 at 01:51 AM ----------
Originally posted by BruceBanner If only there was a way to generate a Tiff from RT that upon import into LR resembled something more of a native DNG, that would be great (because I tried that and the colours are completely different and image much more washed out).
RT can match the sooc files with pretty good accuracy. In my experience you should ensure the following configuration
1. Exposure module > Auto-matched tone curve
2. Colour > Colour management > Input profile > Custom (select preferred Adobe dcp from the LR installation "CameraProfiles/Camera/Pentax K-1/Pentax K-1 Camera Natural.dcp") Make sure you pick the "Camera" rather than "Adobe Standard" profile for emulating sooc. Only "Base table" and "Look table" boxes should be checked.*
3. For pixelshift apply the preset from the Processing profiles > bundled profiles > Pixelshift > PS iso low
4. Apply further sharpening to taste using the tools under the "Detail" tab for instance sharpening, local contrast, micro contrast.
5. You could also ensure that the RAW tab has "Chromatic aberration correction" > auto correction and "Capture sharpening" with the auto checkbox ticked. The chromatic aberration correction can affect the look of files slightly so you might want to check your files to see if it works for you. CA correction must be applied in raw, you can't do it on demosaiced files so you have to do in in RT if you need it.
Save the above using the arrow disk icon at top right. Go into settings using the mixing icon and choose the "Dynamic profile rules" tab. Click "new" at the bottom. Select your previously saved pp3 file under "Processing Profile" > "My profiles" then select "Image type" > "Pixel Shift". This should give you a good baseline image by just exporting your pixelshifted files to tiff. No further tweaking required.
*Note that the Colour management setting "auto matched camera profile" is likely to be the most accurate but you'll loose the "Pentax colours".
There is now also ART
https://bitbucket.org/agriggio/art/wiki/Home a fork ie. copy of Rawtherapee with a somewhat optimised/simplified set of tools and quite a few additional tools such as masking auto perspective correction, film grain etc. It's a different Rawtherapee and works much the same.