Examples?!?!

Good to have a lot of motivation, because the actual rules aren’t too thrilling

Full explanation for mechanism for human binocular vision still unknown!

Coin example (edge of con rarely only view seen)

Rules 1 and 2 work only for generic views. If you’re at a weird view where things line up strangely, you may get shape wrong. But even when discover truth, you cannot change how you see it (!) Rules enable us to see, but also blind us to countless possibilities we can never see because our rules forbid it. http://www.artchive.com/artchive/E/escher/escher_belvedere.jpg.html

Collinear lines in projection (or scene from one point of view) usually indicate collinear lines in real 3D form—and these stay collinear independent of view.

Grouping at work: things close to each other seem related. Exactly how often has to do with line configurations such as collinearity, but just marks near each other automatically seem related…

Says that in general, lines stay lines and curves stay curves. Cohesion of matter? It’s also probably the result of a 3D curved surface—vs. a 2D “line” that is curved and hanging out in 3D space.

Remember, “principles” really mean “conditions we can’t change”. This is one of the conditions we operate under.

So, we see a smushed down version of the world—have to reconstruct 3D aspects. Things behind other things…

Dashed line shows mental construction of smooth surface between the inner and outer rims: saddle switchign to convex. No where is the surface concave…

Your eye-brain system does this automatically to help you recognize the world. You can do it consciously in

We don’t’ only construct 3D surfaces from drawings—this is going on when we view the real world (due to projection, among other things). (reason that drawing work…)

Hat stand http://www.headcovers.com/newimages/antique-hat-stand.jpg

Zen koan—is the triangle there when you don’t look/ (like when tree falls and no one there does it make a sound? –or one hand clapping? We have to be there to “see” anything. Tips of black stroke making up birds are carefully aligned, causing a subjective white surface to “appear” –be constructed. Note the white areas do not look like holes, but like fully rounded, realized surfaces of the birds. Many other explanations, describe din book were put forth to describe this effect. Results of rules based on projection

Gestalt theory of closure (shapes want to be completed/closed) firs thought to be reason—but doesn’t explain left image … On the left the two indicated lines are parallel and therefore get grouped together On right, circular and straight lines do not seem “non-accidental.”

Helps explain why some things are “figures” to us and others “ground”.

In addition to all these rules/cues, we often have another very strong method of determining depth and surface relations: stereo vision. Some people don’t have stereo—even though they seem through both eyes. Can live fine w/out it, but maybe not do certain professions… HTMW p219. (some people see from both eyes, but not in stereo-separate brain processing needed) Official Website of the Stereoscopic Displays and Applications Conference  http://www.stereoscopic.org/

First chapter (intro of vis meth) introduces this framework for studying images. It discussed some history of these elements and why the Rose thinks this framework is effective. Andy disturbed by not seeing anything about what it is that is being communicated

http://yestheyrefake.net/ideal_beauty2.htm