Camera simulation system

Details Camera simulation system Camera simulation system

1997-08-01

2000-02-22

Powell, Mark R.

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

345433, 382255, 382106, 356 302, G06T 1700

Patent

active

060286067

ABSTRACT:
A physical camera is modeled to render an image in a computer graphics system. When given the manufacturer's specifications of the physical camera's lenses, including the dimensions and indices of refraction of its lenses, stops, and shutter characteristics, the location of the film surface relative to the lens system, and the orientation of the camera within the scene, the invention accurately and efficiently mimics the physical principles of image formation creating an image which approximates an image produced by the physical camera. The procedure comprises four main elements: (1) the geometric relationships between the lens system, object, and film plane are modeled by precise placement and movement of lens elements, (2) image geometry is computed by using principles of geometric optics, (3) an exit pupil is calculated in order to define a region for efficiently sampling rays, (4) the image irradiance, or exposure at a pixel, is computed according to radiometric principles.

REFERENCES:
patent: 4965840 (1990-10-01), Subbarao
patent: 5193124 (1993-03-01), Subbarao
patent: 5361127 (1994-11-01), Daily
Potmesil, M. et al., A lens and aperture camera model for synthetic image generation, Computer Graphics, vol. 15, No. 3, pp. 297-305, 1981.
Cook, R. et al., Distributed ray tracing, Computer Graphics, vol. 18, No. 3, pp. 137-145, 1984.

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