Talk:Opponent process

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I've redirected Opponent processes to here. The following is the only paragraph that originated at that location, but I'm not sure what, if any, of it fits in this article. Pasting below just-in-case (and striking out the obviously irrelevant parts). --Quiddity 20:59, 25 August 2006 (UTC)

Opponent processes are observable in neuro impulses (Garbor wavelets), similar to qualia in philosophy. These include color illusions of seeing an opposite color after habituation, physiological homeostasis reactions for temperature, oxygen, food, and stimuluation control. Drug addiction is best understood as being due to the modulation of a homeostatis into a positive and negative phase. Any stimulus, drug, or behavior will lose its strength due to learned habituation, but the opponent reaction to the original drug remains strong. In terms of drugs this means that eventually, people who started to take heroin to experience pleasure will be taking it to feel neutral.

I can see why you deleted the bit about drug addiction... it doesn't fit with the opponent process theory of color perception, but there is an opponent process theory of addiction. I'm considering starting a new article to cover that topic. As such, I wonder if the name of this article should be made more specific to better reflect its actual content? Jesserjames (talk) 17:30, 13 March 2012 (UTC)

Long ago[edit]

I just re-discovered the opponent color page which I created long ago, based on the work of Koenderink and Jan-Mark Geusebroek on the "spatial color model" (opponent color model + Gaussian scale space).

The reason for creating the article it was the use of the "spatial color model" in the analysis of light microscopy images ( This is all in the past now.


Is their any reference to the claims of the last section. Cells receiving info fro M, L, S and ML?BartYgor 01:32, 17 July 2007 (UTC)

Which is the "last section," and which claims are you unsatisfied with? --jacobolus (t) 22:19, 18 July 2007 (UTC)

Sorry for the confusion: The article states: "Parvocellular cells, or P cells, handle the majority of information about color, and fall into two groups: one that processes information about differences between firing of L and M cones, and one that processes differences between S cones and a combined signal from both L and M cones. The first subtype of cells are responsible for processing red-green differences,and the second process blue-yellow differences. P cells also transmit information about intensity of light (how much of it there is) due to their receptive fields." That all kinds of biological processes take place or that some are linked to are vision doesn't supprise me. But that some were exactly mached (not some assumption) to some particular part of our experience (after all that is what color is) I would like to see referenced. Thanks --BartYgor 15:03, 20 July 2007 (UTC)

Comparison to YUV?[edit]

Browsing this article for a first time, I immediately noticed how the primaries described by this color theory closely resemble the coordinate axes of the YUV/YCbCr color gamut (Y = white/black, U/Cb = blue/yellow, V/Cr = red/green). Is it worth linking as a related topic? Or is it not closely related enough.... --Stratadrake (talk) 22:20, 29 May 2008 (UTC)

That depends entirely on whether you have a source that makes that connection. Dicklyon (talk) 23:25, 29 May 2008 (UTC)

Stable Reddish-green[edit]

I've seen a stable reddesh-green before. It was produced in the merge-regions of two dry dyes that were mixed. I suspect the effect could be reproduced by a grid of red & green scaled to just too large for optical mixing effects. Good luck. (talk) 21:12, 8 August 2009 (UTC)JH

Antagonistic colour responses - more citations needed[edit]

The last two sentences in the the first paragraph are presupposing and doubtful. — Preceding unsigned comment added by Wikigraphics (talkcontribs) 22:25, 13 August 2011 (UTC)

Agree, per this source. I toned it down a little. Do more if you like. Dicklyon (talk) 23:05, 13 August 2011 (UTC)


Wouldn't it be a good idea to turn the image 90 degrees? The way I heard you're supposed to use them is to cross your eyes. Hard to do that with the colors vertical — Preceding unsigned comment added by (talk) 02:55, 8 September 2012 (UTC)

"Other uses" section[edit]

In short, I deleted it because it was off-topical. Until July 2007, Opponent processes (edit | talk | history | links | watch | logs) (note the plural) erroneously redirected here. Since it refers to what is described in opponent-process theory article, somebody added here a piece of this theory. Although redirect was fixes, the section persisted. Later, another user found the article in Nature Neuroscience which apparently confirmed that "opponent process" (without actual understanding the meaning of the term) is related to facial expression of emotion, and inserted a reference. Sadly a piece of somebody's work has to be removed, but I am not willing to find an appropriate home article for it. Possibly, it is "opponent-process theory" but I'm not sure because, unfortunately, I have not access to the full text. The abstract and one third-party reference to it do not bear anything related to color vision. Incnis Mrsi (talk) 20:18, 16 January 2013 (UTC)