What are Mach Bands? What aspects of the visual stimulus does their presence ind

Question

What are Mach Bands? What aspects of the visual stimulus does their presence indicate needs emphasis (and why are these emphasized features important)? Sketch a computational network the produces Mach Bands, carrying out the computations for either a discrete step in luminance or a gradual change in luminance (a “ramp”). You must carry out the computations at four points in space in order to demonstrate both bright and dark Mach bands! Be certain to pick the four points judiciously. You must pick some inhibitory gain that is NOT -0.20!

Explanation / Answer

Mach bands is an optical illusion named after the physicist Ernst Mach. It exaggerates the contrast between edges of the slightly differing shades of gray, as soon as they contact one another.

The aspect of the visual stimulus that their presence indicate needs emphasis is edge-detection in the human visual system.

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