Patent EP0248626A2 successfully refreshed from Google Patents.
EP0248626A2
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EP
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Video signal processing
Assignee: Quantel Ltd
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Filing: 1987-06-01
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Granted: —
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Expires: 2007-06-01
Abstract
Abstract A video signal processing system is disclosed which changes the shape of a video frame so that it appears to take the form of a three dimensional object. The system also applies shading to the object in response to an imaginary light source. The address data is processed to produce light intensity factors and the value of each pixel in each video frame is adjusted in response to a light intensity factor.
Inventors
- 👤 Brian Robert Gordon Nonweiler
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 19:41
CPC Classifications
G; G06; G06T; G06T15/00; G06T15/50; G06T15/506; H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/2628
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
161 words
A video signal processing system for changing the shape of a video image so that a video frame appears to take the form of a three dimensional object, comprising: a) an address storage device for storing an address map defining the shape of said three dimensional object, b) a frame store, c) means for loading pixels of an input frame into the frame store in a first sequence, d) means for reading said pixels out of said frame store in a second sequence wherein the relationship between said first sequence and said second sequence is determined from the address map, e) a processing device for processing the address data in combination with an indication of the position of an imaginary light. source to produce light intensity factors, and f) means for adjusting the value of each pixel in the video frame in response to a light intensity factor to produce a video frame having shading due to the imaginary light source.
Claim 2
Dependent Claim
161 words
A video signal processing system for changing the shape of a video image so that a video frame appears to take the form of a three dimensional object, comprising: a) an address storage device for storing an address map defining the shape of said three dimensional object, b) a frame store, c) means for loading pixels of an input frame into the frame store in a first sequence, d) means for reading said pixels out of said frame store in a second sequence wherein the relationship between said first sequence and said second sequence is determined from the address map, e) a processing device for processing the address data in combination with an indication of the position of an imaginary light. source to produce light intensity factors, and f) means for adjusting the value of each pixel in the video frame in response to a light intensity factor to produce a video frame having shading due to the imaginary light source.
Claim 3
Dependent Claim
53 words
A system according to claim 1 in which the processing device includes means for calculating the angle between a vector which is perpendicular to a surface of the three dimensional object and a vector from said surface to said light source, and means for producing a light intensity factor related to said angle.
Claim 4
Dependent Claim
43 words
A system according to claim 2 in which the address map representing the three dimensional object consists of a plurality of point co-ordinates, and the processing device includes means for calculating a light intensity factor for each surface defined by three adjacent co-ordinates.
Claim 5
Dependent Claim
43 words
A system according to claim 3 in which the address map does not contain a co-ordinate for each pixel of the video frame wherein the processing device includes means for interpolating the intensity factors to produce one for each pixel in the video.
Claim 6
Dependent Claim
31 words
A system according to claim 4 in which the value of each pixel is adjusted in response to a light intensity factor before said pixels are loaded into the frame store.
Claim 7
Dependent Claim
49 words
A system according to claim 5 in which the address map does not contain a co-ordinate for each pixel of the video frame including a spacial interpolator for calculating intermediate pixel co-ordinates, and means for converting the three dimensional co-ordinates to two dimensional addresses for addressing the frame store.
Claim 8
Dependent Claim
26 words
A system according the claim 6 in which each pixel of an input frame makes a contribution to four adjacent storage locations in the frame store.
Claim 9
Dependent Claim
43 words
A system according to claim 1 in which a sequence of video frames making up a video signal are loaded into the frame store and read from the frame store in real time thereby effecting a shape change of a moving video image.
Claim 10
Dependent Claim
19 words
A system according to claim 8 in which the address storage device stores a plurality of related address maps.
Claim 11
Dependent Claim
35 words
A system according to claim 9 in which the means for loading pixels to an input frame includes a temporal interpolator for calculating address maps intermediate to address maps stored in the address storage device.
References Cited (Backward Citations)
No citation records indexed.
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