Role of sensor in color rendering?

Started 3 months ago | Discussions thread
JimKasson
JimKasson Forum Pro • Posts: 29,188
Re: Role of sensor in color rendering?
3

lélé wrote:

Disclaimer:

  • I'm a hobbyist, with limited technical background on that particular topic...but eager to learn!:)
  • I'm not a native English speaker, so my wording may be inacurate not only because of my lack of technical knowledge, but also language/translation issues.
  • That said, I think I roughly understand the overall idea and differences behind 'colorimetry', 'color appearance' and 'pleasant colors'.
  • I don't want to (re)start any brand war!

=============

Hello!

I was playing around with Lumariver Profile Designer, an X-Rite ColorChecker SG color target an my Sony a7R IV. I was very surprised to see the color differences in skin tones I got with 'matrix only' profile. Those were backing up impressions I got, like hue shifting to more 'greenish' when in the shadows.

I also played around with other cameras files, in particular Canon ones, and this issue was less noticeable.

I was wondering how the camera sensor, in particular the CFA design, could impact that.

Mays you have more info' ?

The CFA dyes/pigments affect the color rendering. They are not the most important thing that affects colors in the final image; the raw development is more important.

If cameras obeyed the Luther-Ives condition, and saw colors in a way that can be directly related to the way that color-normal humans see them, cameras would all see color in the same way. But they don't.

Some background:

https://blog.kasson.com/the-last-word/roles-of-camera-and-raw-developer-in-determining-color/

https://blog.kasson.com/the-last-word/the-color-reproduction-problem/

Jim

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