Determining orientation of transformed image
First Claim
1. A method of processing video signals to achieve a visual effect involving three-dimensional manipulation of an input image includes determining whether in a resulting transformed image the front or the back of the input image should be displayed by the steps of:
- defining an incremental surface in said transformed image by at least three adjacent non-collinear pixel addresses from said transformed image;
determining from said transformed pixel addresses whether a vector normal to said incremental surface points towards or away from a viewing point; and
selecting for display at one of said transformed pixel addresses the corresponding portion of the front or the back of said input image in dependence on whether said vector points towards or away from said viewing point.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of processing video signals to achieve a visual effect involving three-dimensional manipulation of an input image includes the use of a circuit for determining pixel address by pixel address whether in the resulting transformed image the front or the back of the input image should be displayed. The circuit comprises a device defining an incremental surface in the transformed image by at least three adjacent non-collinear pixel addresses from the transformed image, a circuit for determining from the transformed pixel addresses whether or not a vector normal to the incremental surface points towards or away from a viewing point, and a device for selecting for display at one of the transformed pixel addresses the corresponding portion of the front or the back of the input image in dependence on whether the vector points towards or away from the viewing point.
-
Citations
10 Claims
-
1. A method of processing video signals to achieve a visual effect involving three-dimensional manipulation of an input image includes determining whether in a resulting transformed image the front or the back of the input image should be displayed by the steps of:
-
defining an incremental surface in said transformed image by at least three adjacent non-collinear pixel addresses from said transformed image; determining from said transformed pixel addresses whether a vector normal to said incremental surface points towards or away from a viewing point; and selecting for display at one of said transformed pixel addresses the corresponding portion of the front or the back of said input image in dependence on whether said vector points towards or away from said viewing point. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A circuit for processing video signals to achieve a visual effect involving three-dimensional manipulation of an input image, including a video signal processing circuit for determining whether in a resulting transformed image the front or the back of the input image should be displayed, the video signal processing circuit comprising:
-
means for defining an incremental surface in said transformed image by at least three adjacent non-collinear pixel addresses from said transformed image; means for determining from said transformed pixel addresses whether a vector normal to said incremental surface points towards or away from a viewing point; and means for selecting for display at one of said transformed pixel addresses the corresponding portion of the front or the back of said input image in dependence on whether said vector points towards or away from said viewing point. - View Dependent Claims (8, 9, 10)
-
Specification