xpatUSA

Quoting or linking to third-party opinions and misinterpretations of 'the diagram' is pure hearsay, sorry Rudi. Only a link to where Foveon/Sigma calls it a 'dual-layer' sensor would be credible. I ...

I have experience with Merrill SD1 shooting IR which is kind of sorta like monochromatic. I found Low resolution slightly better than High for those wavelengths. I would recommend to shoot raw, not ...

Just now read your post, George. I wish you a steady and on-going recovery.

For the record, I do NOT think that the Quattro is already the beginning of the end for "true trichromatic", whatever that means.

Posting here for continuity, David. First, I downloaded and cropped this Pentax shot: Then open it in the GIMP: Histogram shows a good capture. Now go Colors>Components> and click on >Decompose In ...

Looks like we cognoscenti agree on that. Always a middle, but I get your drift ... Agreed.

I've done that in the past for looking at lamp spectral emissions. Daylight reflected from a CD or DVD is another way. I seem to recall that the lines/mm affect the "resolution", wavelength-wise. P ...

I'll get started on that and probably publish it as a separate thread for the general interest of a few of us ...

Yes Scott, that would be me: DP2, SD14&15 - even getting the DP1 Merrill ready to sell as we speak. Very good point but I have no such plans personally. Wouldn't it be nice if those profiles were ...

As @FDecker says, it is impossible to make a trichromatic "RGB" without three layers, sorry Kim. Even if the illustration in the OP were of an actually proposed physical sensor - the depths shown ...

Quite so, Frank, I agree. Here are three pipelines considered by Foveon prior to 2006: http://kronometric.org/phot/sensor/fov/CIC13_Hubel_Final.pdf Of slight interest is that the outputs are YCbCr ...

Personally I use SPP 5.5.3 which does all I need for my DP1 Merrill, but some here would recommend you to use the absolute latest SPP 6 (6.6.1?).

If what you're calling noise is print texture, have you considered a slight de-focus in the shot, David? Or, if the noise is in the conversion to color, have you considered some serious noise ...

What? I quit, 'bye.

DP2M blue versus red layers, shot a while ago: The red layer was softer than the blue in that test ... see MTF50 value and the 10-90% value.

Here we go again with terminology (I hope Richard doesn't see this) :-( I'm thinking that, by "resolution" you are referring to the layer sampling rates, the which being the same by definition of ...

I've read that the "red" layer has a lower MTF than the other two. Having recently acquired a DP2, I measured the edge response (aka sharpness) of each layer and also the SPP mono version of the ...

Have a look at the "blue" curve. It peaks at about 425nm. Also look at the red curve which only just beginning to fall from it's peak at 700nm. Those curves are for the sensor WITHOUT the IR dust ...

Nothing wrong with that, as long we account for the compensating effects of human vision. Can't help you there, my computer is Adobe-free ... Just so's we're clear - I have the working color space ...

Why not shoot some targets? For color, shoot a color-patch target such as the 24-patch X-rite Macbeth? Each patch has a defined color which you can compare to your C1/LR's color-picker and thereby ...