Patent ID: 6064392
Filing Date: 2000-05-16
Classification: G06T

Abstract:
A method of generating linear fog effects in an image on a display using a computer system comprising the steps of:defining a start position for a linear fog model;defining an end position for said linear fog model;computing a fog distance, wherein said fog distance is a distance from a first reference position to a second reference position at which visibility is a predetermined value, said fog distance being equal to (0.63*end position)+(0.37*start position);determining a fog ratio comprising a ratio of a fog density at said first reference position to a fog density at said second reference position beyond the fog distance;computing a distance, D, from a sample point on an object to be displayed, to said first reference position;determining a visibility value at said sample point, wherein said visibility value is equal to ##EQU56## wherein K5 is a curve fitting parameter; mixing a fog color and a background color to obtain a pixel color based on at least one of said visibility values.