If one eye is fixed on a point in space, the visual field for this eye may be thought of as the part of a surface of a sphere on to which all visible objects are projected.
According to the Minkowski sum theory, the dilated polyhedron is constructed via sweeping a sphere on the surface of a basic polyhedron.
"We have facilitated for you a sphere on which you can make a mark.
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"Do you know when this was made?" he asked with a smile, pointing to hundreds of mouse skulls sculpted into a perfect sphere, on display during a show of his collection in Paris at the Maison Rouge, Antoine de Galbert Foundation this year.
Figure 2 Projection from a sphere to a plane: one-to-one mappings from a node on a sphere to a node in a plane.
The paper describes the experimental model of the check valve with two alternative options for the blocking element – one in the form of a hollow ball in a support bowl; and another one, in the form of a semi sphere on a guide rod going through the support sleeve on the valve spindle.
Each material is rendered on a sphere at a resolution of 200×200 on 50 images of various lighting directions.
Standing in front of the Mona Lisa – only this version was around three times the size of the original and had a blue sphere on a shelf that jutted out from the painting – the artist Jeff Koons noted that he wasn't the first artist to reinterpret Leonardo da Vinci's masterpiece.
