System for modifying lighting in photographs

Details System for modifying lighting in photographs System for modifying lighting in photographs

1997-02-27

1999-04-13

Nguyen, Phu K.

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

G06F 1500

Patent

active

058943099

ABSTRACT:
A system for creating lighting for a photograph generates a large number of mages based upon structures determined from the photograph and randomly selected light positions, types and directions. One or more photographs are analyzed to determine the three-dimensional structures in the photographs. These structures are represented as gray surfaces, to which lighting is applied. The images are culled to provide a set of images which best spans the lighting space represented by the large number of images. The culling process is iterative; at each iteration, the image which is most dissimilar from a nearest neighbor in the selected set is added to the selected set. The images are organized in a hierarchical structure. A user interface allows the user to review and select images in the hierarchical structure. The images selected by the user are combined to create a final image with composite lighting. The lighting specifications can be saved for future reference by the lighting system or other applications. The lighting of the gray surface images are used to modify the intensity of pixels in the photograph in order to change lighting in the photograph.

REFERENCES:
patent: 5422986 (1995-06-01), Neely
patent: 5739819 (1998-04-01), Bar-Nahum

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