Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1996-05-24
1998-06-23
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345153, 345112, G09G 500
Patent
active
057710333
ABSTRACT:
In association with a computer system, a method and system for implementing a graphical dissolve effect of a first image into a second image displayed on a computer screen. The sequence in which each pixel comprising the first image is replaced with a corresponding pixel in the second image is determined mathematically such that the sequence appears random, thereby producing a dissolve effect that is visually pleasing. The sequence in which the pixels of a first image having a width and height of "w" and "h" pixels, respectively, are replaced is determined by first selecting a value for the variables p and m. The number p is a prime number and the number m is selected such that the numbers m, m.sup.2, m.sup.3, . . . , m.sup.p-1, when taken modulo p, yield a reordering of the numbers 1, 2, 3, . . . , p-1. A random number k.sub.0 is selected between 1 and p-1 and a number k is set equal to k.sub.0. A number j is then calculated according to the formula j=(w*h)+k-p. If j is non-negative, pixel number j in the first image is dissolved by replacing it with the corresponding pixel from the second image. A new number j is then calculated according to the formula j.sub.new =j-(p-1). If j is negative, a new value for the number k is calculated according to the formula k.sub.new =(k*m) mod p and then a new value of j is calculated according to the formula above using k.sub.new. The entire first 30 image is dissolved when the value of k.sub.new is equal to k.sub.0.
REFERENCES:
patent: 5287093 (1994-02-01), Amano et al.
patent: 5515449 (1996-05-01), Tsuruoka et al.
patent: 5657248 (1997-08-01), Hamada et al.
patent: 5664080 (1997-09-01), Lucas et al.
Morton, Mike; "A Digital `Dissolve` Effect", Graphic Gems, Academic Press, Inc., 1990, pp. 221-232.
Chang Kent
Hjerpe Richard
Microsoft Corporation
LandOfFree
Method and system for dissolving an image displayed on a compute does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for dissolving an image displayed on a compute, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for dissolving an image displayed on a compute will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1397776