Isaac RC
lvl.4
Spain
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Thanks for your feedback, I'd very much enjoy to discuss the color science of Action 2 engineering, nevertheless accessible for everyone so allow me to use open concepts without sparing in detail should anyone follow.
I am actually testing thoroughly both color profiles for some weeks now, and first of all state the fine level of quality I see of both color profiles, but regarding "sharpness" let's state an unusual characteristic of color:
- Sharpness doesn't affect color as we could actually blur the color separately on purpose and the image would still be equally sharp, although a color bleeding through black&white edges would be visible in this extreme example.
- Let's note that sharpness is a key refinement process that takes place in the demosaicing of an image and it's role is to render image's pixels edges focused, clean of pixel artifacts and DJI Action 2 does that perfectly if one checks a RAW photography,
- Because RAW format is the maximum quality standard currently used by any digital camera, one should differentiate it from the quality of compressed formats such as JPEG or HEVC and H.264 video settings in Action 2, since RAW quality in video would eat any SDcard storage in a matter of seconds or a few minutes then compression purpose is to lose image data compromising the least of possible the image quality. Important to note that with compressed format attempting to revert sharpness is useless since the original quality is not available it would worsen the already compressed quality even more.
- Even in RAW quality there's the known optical defects that occur naturally regarding sharpness, one can look up more info about "Aliasing", "Moiré", "Fringe" and the inevitable "Pixel Noise" but all those optical effects in video, because the difference from photo is that the image is moving, it makes those defects even more apparent.
- The most used solution to all these compromises in professional cinematography is recording a purposely smoothed detail in order to minimise and protect from unwanted defects and then with video editor use fine sharpening tool adjusting the amount depending on the level of optical defects that may present each specific scene.
So finally to explain my feedback argument: I see DJI Action 2 Sharpness looks perfect with RAW original quality, but with compressed video I see (with a 4K display and tested with D-Cinelike and Normal color) many of the pixel defects and negative tradeoffs described above, further more when Action 2 stabilises the image it's effectively cropping in, the pixels appearance gets bigger, therefore making even more visible the quality issues. Also when scaling down resolutions from its original 4K to 2,7K and 1080p settings Aliasing takes place and makes it even more visible.
To sum up, a sharpness control would allow the image render more natural and open to elevate its quality in postproduction for professional use, fine details, faces detail, etc, although I imagine the concern to present ready made sharp focus images for everyone, I see an avoidable negative cost in image quality for professional purposes when its control it's left out of the consumer.
Thanks
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