A Samsung Galaxy S22 can shoot in Expert RAW mode. This produces excellent images in linear DNG and jpeg formats.
Refer to https://www.samsung.com/levant/support/ ... t-raw-app/
However, my attempts at processing these linear Dng files using PWP produce so-so results.
Question open to all, what is your highest quality workflow to process linear DNG files using PWP. ?
Workflow for linear dng files
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Re: Workflow for linear dng files
My initial S22 linear DNG file conversion workflow [sRGB working/display color space and 2.20 gamma]:
1. Convert the DNG file to your working and display color space (sRGB);
2. Linearly expand to white (255) and black (0) points;
3. Apply an Inverse 2.20 gamma curve;
4. Correct white/black points for color balance; and
5. Lightly sharpen for small, medium, and large detail. Attached is a workspace script (in ".txt" format for posting) for the above steps in the HSV, HSL, and RGB color spaces.
The resulting image(s) is/are suitable for further tone/color mapping according image content and artistic preferences.
The images are somewhat flatt but contain all available file tone/color/detail.
Mostly I will use the resulting RGB image for my preference tone/color mapping to the final image.
...den...
1. Convert the DNG file to your working and display color space (sRGB);
2. Linearly expand to white (255) and black (0) points;
3. Apply an Inverse 2.20 gamma curve;
4. Correct white/black points for color balance; and
5. Lightly sharpen for small, medium, and large detail. Attached is a workspace script (in ".txt" format for posting) for the above steps in the HSV, HSL, and RGB color spaces.
The resulting image(s) is/are suitable for further tone/color mapping according image content and artistic preferences.
The images are somewhat flatt but contain all available file tone/color/detail.
Mostly I will use the resulting RGB image for my preference tone/color mapping to the final image.
...den...
- Attachments
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- Linear DNG File.workspace.txt
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Re: Workflow for linear dng files
Hi Den
I get an error when loading the workspace script.
Could you check it and also post a plain script file for the end image (s)
What is an inverse gamma curve and why ?
Many thanks
Pierre
I get an error when loading the workspace script.
Could you check it and also post a plain script file for the end image (s)
What is an inverse gamma curve and why ?
Many thanks
Pierre
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- Posts: 860
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- What is the make/model of your primary camera?: Canon EOS-350D/Fuji X100T
- Location: Birch Bay near Blaine, WA USA
Re: Workflow for linear dng files
Pierre...
It has been too long since I've edited a script to know what is specific to my files/system so I will post pictures of the RGB branch from which it is simple to form your own script.
Step 1. An Expanded histogram RGB-All Color Curves transform in which the upper right control point is moved left to the histogram edge and if necessary the bottom point is moved to the right. Step 2. An Inverse 2.20 gamma brightening curve is applied using an RGB-All Color Curves transform. Step 3. The black/white point color casts are removed using the Multi-Color Balance transform. Continued in next post...
It has been too long since I've edited a script to know what is specific to my files/system so I will post pictures of the RGB branch from which it is simple to form your own script.
Step 1. An Expanded histogram RGB-All Color Curves transform in which the upper right control point is moved left to the histogram edge and if necessary the bottom point is moved to the right. Step 2. An Inverse 2.20 gamma brightening curve is applied using an RGB-All Color Curves transform. Step 3. The black/white point color casts are removed using the Multi-Color Balance transform. Continued in next post...
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- Location: Birch Bay near Blaine, WA USA
Re: Workflow for linear dng files
Continued....
Step 4. Light sharpening is applied using the Multi-Sharpening transform with Pass 1, R=50; Pass 2, R=5; and Pass 3, R=2. For why an Inverse 2.20 gamma assuming you have a LCD sRGB display, see: https://www.eizo.com/library/basics/lcd_display_gamma/
...den...
Step 4. Light sharpening is applied using the Multi-Sharpening transform with Pass 1, R=50; Pass 2, R=5; and Pass 3, R=2. For why an Inverse 2.20 gamma assuming you have a LCD sRGB display, see: https://www.eizo.com/library/basics/lcd_display_gamma/
...den...
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Re: Workflow for linear dng files
Hello Den,
Thank you very much, your workflow is very clear !
Thank you very much, your workflow is very clear !
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Re: Workflow for linear dng files
...
I recently upgraded to Expert Raw v3.0.08.10 for my Galaxy S22 camera phone and PWP8 will no longer open the linear *.dng file and produces an error message: "Error reading file: C:\... \...\20241002_112201.dng".
Also, the linear *.dng file cannot be read by Raw Therapee v5.11 or Dark Table v4.8.1.
A work around is using Adobe DNG Converter v17.0, changing the Preferences/Compability to "Camera Raw 14.0 and later".
So that the converted file is recognizable, change "File extension:" to " .DNG" if it is to be saved in the same folder as the original.
This seems to be a Samsung\Windows related problem awaiting resolution...
Have fun... ...den...
I recently upgraded to Expert Raw v3.0.08.10 for my Galaxy S22 camera phone and PWP8 will no longer open the linear *.dng file and produces an error message: "Error reading file: C:\... \...\20241002_112201.dng".
Also, the linear *.dng file cannot be read by Raw Therapee v5.11 or Dark Table v4.8.1.
A work around is using Adobe DNG Converter v17.0, changing the Preferences/Compability to "Camera Raw 14.0 and later".
So that the converted file is recognizable, change "File extension:" to " .DNG" if it is to be saved in the same folder as the original.
This seems to be a Samsung\Windows related problem awaiting resolution...
Have fun... ...den...