Here, I only take one example from my monograph (Julesz 1971) that shows that optical illusions must occur after binocular combination of information after several synaptic processing stages in the retina, the lateral geniculate nucleus, and the cortex. Julesz makes the following statement: “There are many demonstrations that illustrate that stereopsis of RDSs (to which I often refer as either ‘global stereopsis’ or ‘cyclopean perception’) must be an early process, based on some correlation-like process prior to object (form) recogntion. 62 to show that the RDS itself is a form of optical illuision, or at the very least a binocular virtual reality. Here I want to extract what Julesz writes on p.
#STEREOGRAM ILLUSION FULL#
While Dialogues is decidedly more literary, it is chock full of important scientific insights. In a prior blog post I wrote about Julesz’s other seminal book, Foundations of Cyclopean Perception. With this literary device Julesz actually shapes the book as metaphor for the RDS itself: the interplay of an “A’ and a “B” pair that give rise to a uniquely binocular third dimension.
The reader is assumed to take part in the dialogues by agreeing with “A” or “B”, or perhaps by having a third opinion, orthogonal to the ones expressed, and deriving a novel idea.
Leave it to Julesz to cast Dialogues on Perception as an exchange between “A” the author, and “B” his alter ego. If you recongnize the name, it’s likely because Julesz is widely credited with inventing the computer generated random dot stereogram (RDS) in 1959. That old joke is the preface to a scientific autobiography of sorts by the brilliant experimental psychologist, Bela Julesz,and learning was one of many topics on which he was innovative, to say the least. Mother: Johnny, why do you pester your tired father with so many silly questions?įather: That’s all right, my dear, let the child ask - that’s the way he learns!
Johnny: Dad, why does the lion roar so loud? Johnny: And why does the giraffe have such a long neck? Johnny: Dad, why does the elephant have such a big trunk?įather : I haven’t the foggiest idea, son. A farmer, his wfie, and their young son Johnny are visiting the zoo for the first time.
0 kommentar(er)
