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For those of you looking for the whole Hitchhiker's Guide to Digital Colour series, you can find it at its home over at hg2dc.com

@EvilBoris - can’t actually get to discussing *pictorial depictions*, because we don’t stop to ask ourselves what pictures *are*. There is nothing dictating “Oh this will look like trash”, because the *reason* something looks like trash is *the pictorial formation* process.

@EvilBoris No because we are suffocating under Kodak and Giorgianni’s completely bunk ideas around colour cognition. We can’t get to asking the key questions as to *why* the pictorial assembly is cognized as broken, because we insist on conflating stimuli with colour. Subsequently, we +

@hybridherbst @AkiyoshiKitaoka You should know the answer. Focus on cognitive fission into forms / layers, and the answer becomes obvious.

@AkiyoshiKitaoka I think an interesting additional experiment would be: what color do the three right eyes need to be, respectively, so that in all configurations both eyes look grey?

The right eye appears light blue in the left panel, yellow in the middle panel, and red in the right panel, though in each panel the right eye is the same color (= gray) as the left eye. Simple configuration of color contrast makes a weaker effect, as shown below.

@nemo20000 @finite_fields @AkiyoshiKitaoka

@nemo20000 @finite_fields @AkiyoshiKitaoka What swatch is without colour in this articulation? Notions of “without colour” are also cognitive computations; the notion of colour itself is not in any way communicated by a global frame stimuli specification, of which the CIE colourimetric model is.

The left face appears whitish and the right one blackish, but they are made up of the same luminance. 左の顔は白く見え、右の顔は黒く見えるが、同じ輝度である。

@nemo20000 @finite_fields @AkiyoshiKitaoka - relative to the “ground” in case A, and “down” relative to case B? This is the super importance of the luminance gradient in relation to cognitive computations of “lightness”. Happy to supply citations, as required.

@nemo20000 @finite_fields @AkiyoshiKitaoka CIE colourimetry is bogus nonsense when extended to articulations. It’s totally bogus nonsense. Ganglion pooling of bipolar cells transfer gradients, not scalars. Hence the demonstration that Akiyoshi is showing relates to the local field polarities. See how the face is “up” +

@nemo20000 @finite_fields @AkiyoshiKitaoka I promise that the three signals are highly correlated and all are “colour”. Luminance (P summed D) and Chrominance (P inhibitory D and (P summed D) inhibitory T) are all implicated. It’s not quite as you are painting it as luminance being “outside” colour. This is false.

@troy_s @finite_fields @AkiyoshiKitaoka “Colour” is luminance PLUS chromacity. Luminance is a property of colour. When a colour is expressed in the CIE XYZ colour system, the Y is the luminance. When expressed in an RGB colour system, “Red” is also a property of the colour – but you would not claim “Colour is Red”.

@nemo20000 @finite_fields @AkiyoshiKitaoka Here is a simpler version, where the research tracks back to Arend and Brainard and others.

@nemo20000 @finite_fields @AkiyoshiKitaoka Colour is luminance. Don’t be foolish. Pay attention to the polarity of the faces and you’ll quickly realize it’s the ganglion cell pooling. Our visual cognition is *differential gradients*, not scalar quantities like a sensor. Hence the super importance of polarity.

@worldsday @miketuritzin Just repeat “linear” a hundred times, and then finish with “perceptual”.

Is it just me or is this a really confusing way to illustrate a linear vs. perceptual ramp? (from the Unity docs)

@imadr_ Colour is a **biological** cognitive inference computation, that emerges from the cognitive assembly of inferences of the spatiotemporal articulations of the energy.

@imadr_ Just wavelengths. No colour.

For the record, this is one idiot techbro *assumption* without a shred of research. It’s a false assumption, for anyone who actually reads research or does their homework. Shame on Khronos for propagating random techbro opinion, but we should expect nothing less.

@imadr_ (In your diagram, there is no such thing as a “red” photon, nor a “red” pixel.)

@imadr_ - signals is an active area of research. No better than to show you two picture formations derived from the same colourimetric electrical sensor entry point. Notice how one contains stimuli that leads to cognitively dissonant cues of “a translucent cup”?

@betamaledroid @DiracDel Slowly working through a sentence by sentence exploration, with some selected examples and citations: @troy_s/112463060582581962" target="_blank" rel="nofollow noopener">mastodon.art/@troy_s/112463…