Megamind With a Hypercentric Camera

Make Yourself a Megamind With a Hypercentric Camera

Sometimes all it takes to pick up a new skill is a different way of looking at things. But what can be learned from completely flipping your perspective using a hypercentric lens? One is that it’s possible to create extremely bizarre human appearances.

To be fair, there’s a lot to the optical story in this picture, which [volzo] discusses in great detail. The short version is that the perspective of a photograph can be manipulated for artistic effect by placing optical elements in the right order, even to the point of reversing the normal diminution of the apparent size of objects in the scene that are farther from the camera.

The majority of lenses try their best to keep the scene’s perspective outside of this uncanny valley, but some machine vision systems use telecentric lenses that manipulate perspective to make identical objects in the scene appear to be the same size regardless of their proximity to the camera.

On the other hand, a hypercentric lens flips perspective on its head, making close objects appear smaller than far ones and distorting objects like the human face in a funny way.

[volzo]’s hypercentric camera uses a 700-mm focal length A camera is precisely positioned in relation to a Fresnel lens using a motorized gantry mounted on the lens to achieve the desired effect.

Although it’s not strictly necessary for the hypercentric effect to function, a Raspberry Pi controls the gantry. However, lighting is crucial, and a ring of LEDs surrounding the primary lens provides even illumination of the scene.

Read More: Paper Shoot Camera Review

Source: hackaday

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