ggbutcher

All raw processors, in-camera or software, have to do at least this: 1. black subtract: the raw data has a bias due to how the electronics work so the data needs to be "moved down" so black is ...

Bought the FX version right after I procured the Z 6, I was missing the reach I had with my D7000 and 18-140.  Works really well on that camera, VR+IBIS allows me to shoot low light with it, down ...

Sounds like a mess of biases to take out. Really, just diffract a halogen source, and pull the data out of the pixel columns in a single image of the spectrum.  Shining the light on target patches ...

I re-did the dcamprof camera profiles with the predicted and rawtoaces data using the 1600-patch munsell reference dataset that comes with dcamprof. In the interest of brevity, here are the max dE ...

Like this: https://discuss.pixls.us/t/the-quest-for-good-color-4-the-diffraction-grating-shootout/19984 This is the last of a four-post sequence on how I came to precisely your conclusion, made ...

The inverse firmware WB multipliers might give a sense of the curve peaks related to each other, but there's no information about where in the spectrum the peaks reside.  I think that's where the ...

Based on this, I'm gonna say '76: https://rawtherapee.com/mirror/dcamprof/dcamprof.html#observers but Anders isn't specific about it. Johannes is looking at this dataset as a possible source of SSF ...

Okay, that makes sense.  And, the low-pass predicted curve is clearly not the same as its measured counterpart. I'm just wondering if the performance against the CC24 training data is sensitive to ...

Strictly speaking, doesn't it tell me that this particular predicted SSF dataset will resolve those 24 colors to within a deltaE to a spectral reference that's not much worse than a target shot ...

So, proof's in the pudding, I made camera profiles from each dataset. Here are the CC24 patch deltaE, sorted min-max: 1. predicted SSF: D02 DE 0.00 DE LCh +0.00 +0.00 +0.00 (gray 80%) D06 DE 0.07 ...

Here are the Z 6 plots.  I have two, there were two predicted datasets for the Z 6, each plotted against my spectroscope measured SSF:

Working remote with the data, so tools are limited. I have multiple measured dataset for the following cameras: Canon 5D MkII -  camspec, naemrualab, rawtoaces Nikon D200 - camspec, rawtoaces, mauer ...

Bear-of-little-brain here, I would think that an estimation method based on target-shot-derived primaries would at least get the peaks close, as that's really the only directly available ...

Indeed.  The Bayer mechanism heavily leverages metamerism in getting us to think rich spectral mixes are equivalent to the simple three-value encoding off the array.  I don't think there's ...

I agree, an ingenious contrivance. Some light reading on its inventor: https://en.wikipedia.org/wiki/Bryce_Bayer This might give you food for thought with regard to where things might go next: http ...

Strictly speaking no, Prophoto contains colors not visible to human response, much less renderable on current monitor technology. To make sure the term is understood, "gamut" refers to the range of ...

There are a number of other benefits to having spectral data for the camera.  LUT camera profiles can be made, which can be shaped to do better transforms of out-of-gamut colors.  Don't need a ...

I think what we need to keep in mind here is that we're looking at the so-called "spectral colors", a distinct and rather small subset of the total possibilities of wavelength combinations.  That ...

I shoot the spectrum through a lens, and my LUT profiles trained on Colorchecker 24 reference data typically have around 2.7 max dE. That's the conclusion I came to building a "rube goldberg" setup ...

I do camera profiles with diffraction shots, went back to my work and took one of my captures and processed it to a JPEG with only black subtract and demosaic: The diffraction grating was one of ...