troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 13/10/2025Here we could suggest that there is a more or less “continuous” lamina-like form between the pictorial space frustum and the segmented forms “further away”. But what happens if we tweak one of the segmented regions? Here I’ve swapped one of the segmented […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 13/10/2025When we consider the segmentation along z of vision, we can perhaps begin to see how such boundaries might exist, and in doing so, perhaps we can arrive at a model to predict them. Think of a pictorial depiction that includes a segmentation along z of a “green […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 13/10/2025Scott basically constructed spectral energy quantities that match the colourimetric coordinates of a given “adapting” illuminant, and multiplied the results. The intriguing part is the way the projections deform to the classical locus projection. In the […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 13/10/2025This is where I believe stereographic projection could help us. There are some eerie similarities here to Apelle lines and what not as well, I might add. Here, we can think of the additive components of attenuating excitation purity as existing in the upper […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 13/10/2025When we think about the canonical colourimetric diagram, we are deceived by the illustrations. These sorts of bunk diagrams ignore the nature of the integrals of the energy in terms of sensory signal as we move toward the perimeter. That outer horizon line of […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 13/10/2025When we think about integrals of radiometric energy, under the premise that it is these integrals that are transduced to the sensory signals, we can quickly see that a three dimensional Euclidean sort of a colour solid cannot be tenable. If we think about the […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 13/10/2025Multiplication is an intriguing operation as, across varying discrete samples, multiplication will amplify the dominant energy of a given mixed sample. 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 27/09/2025Does anyone find the "white" band peculiar here? 000 0
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 26/09/2025Anyone who utters any sort of claim around “HDR” ought to be cornered and forced to explain what: 1. Highlight is. 2. Specular is. 3. “White” is. I promise not a soul will be able to do so in any rigorous manner that validates the claims around the BT.2100 […] [Original post on mastodon.art] 000 0
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 22/09/2025Raphael’s “The School of Athens”. Some unique details around the ideas surrounding picture exposure. Specifically the clothing details are depicted as attenuated with respect to excitation purity. The material characteristics we cognize are uniquely […] [Original post on mastodon.art] 000 0
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 20/09/2025Yilmaz H. Perceptual invariance and the psychophysical law. Perception & Psychophysics. 1967;2(11):533-538. doi:10.3758/BF03210261 000 0
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 16/09/2025This is someone's book shelf. Seriously. 000 0
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 16/09/2025So it sadly seems Zoom and other streaming platforms have embraced Assembled Statistical Sequencing software. I'm suffering through a stream with wobbly lines and moshed regions that have no "texture". This is likely in the service of cutting costs on the […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 11/09/2025pictorial view frustum. But can we imagine *another* form, that is not spatially curved away from the pictorial frustum, where a modification of the excitation purity might not have a probability of being cognized as “bringing toward the frustum”? How would […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 11/09/2025Why do I keep hammering on how our conscious constructed space seems to matter at a superimportance level? Because there is an almost ubiquitous and subconscious component of spatial constriction implicit in all pictorial analysis. (Arguably all of visual […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 11/09/2025If we put a “spatial thinking first” hat on, we can look at examples and discuss how the gradient relationships relate to our conscious, multistable, and computed constructions of space. This example from @petrikas is damn brilliant, and really should have more […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 11/09/2025Marlow PJ, Mooney SWJ, Anderson BL. Photogeometric Cues to Perceived Surface Shading. Current Biology. 2019;29(2):306-311.e3. doi:10.1016/j.cub.2018.11.041 010 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 10/09/2025It is rather amazing that I followed this exact train of thought and arrived at a rather similar formulation. 000 0
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 10/09/2025It is amazing how one can “sniff” something. Turns out my sniffing might be related. My head just exploded. So I have farted with scaling the XYZ functionals, and know the α β patterns can be gleaned from the colourimetric projection. Anyone recognize Yilmaz’ plot? 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 10/09/2025Wow. Gilchrist’s “Eye as Photometer” myth, conveyed decades prior by Yilmaz. 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 10/09/2025Yilmaz, Huseyin. “On Color Perception.” The Bulletin of Mathematical Biophysics 24, no. 1 (March 1962): 5–29. doi.org/10.1007/BF02477863. 200 2
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025Notice how the bread and butter of our potential heuristic information to deduce the “colour” of the depicted “shape” increases significantly by chasing the local polarity inversions of this form? Not only do we have the obvious Apelle line, but now we have an […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025If we imagine the first column of the Briggs’ picture as samples from some spatial 3D shape depiction, instead of a basic columnar arrangement of “plane”, what would we cognize the colour of the shape as being? My hunch is that I suspect we’d lean toward that […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025What is intriguing here is that we can cognize a “filter” cognition in *both* cases, but the emergent cognition of “white” seems to be predicated on a polarity inversion relationship within the segmented form. Arguably we might have some sort of “swatch […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025What is intriguing here are the different cognitions that emerge! If we applied a closer to physical emulation of filtration, the upper range would be scaled down in emission, multiplied by the filtration attenuation. We’d likely cognize “all red”, including […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025What I find rather fascinating about Briggs’ example is that he didn’t emulate a pure filtration, but rather substituted out the ground. A more reasonable “filtration emulation” would always lead to a decrement orientation across the range. Instead, with the […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025For folks who might not be aware, the Apelle Line is an idea taught to illustrators and painters. It is the depth boundary line in a cognized shape, often amodally completed as it is often “contour completed” by following the fuzzy boundary of the “shadow”. In […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025And for reference, here is the newer Briggs illustration. Only look at the first column and think about "lightness". Notice the pattern that emerges with specific attention to "lightness"? 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025Here's a "chromatic filter" variation that is vaguely similar to Briggs example. Pay close attention to how the "lightness" scale is wildly different in the two example cases! 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025Here's the gradient at the boundary relative to the segmented "ground". As visually striking as the "lightness" example is, the gradient at the boundary is almost entirely elusive unless one knows to think about it. 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025The "glaringly obvious part if you happen to have a PhD in computational vision science" is that the segmented "ground" determines a sort of "fulcrum". That is, within the segmented region of each "rectangle", we have a local gamut, and the "ground" seems to be […] [Original post on mastodon.art] 100 1
troy_s :praxis_100: @troy-s.mastodon.art.ap.brid.gy · 04/09/2025As you may have guessed, yes the discs are all identical tristimuli emissions in each disc. The sole difference is the segmented "ground". Now if your name isn't Vladusich, you probably aren't quite aware of the glaringly obvious pattern in the picture. Can you spot it? 100 1