Delay detector apparatus and method for plural image sequences
DCFirst Claim
1. An apparatus for determining the best match between a first image and a plurality of other images, the system comprising in combination:
- an element for selecting known image locations,an element for taking a first set of samples of said first image at said image locations,an element for taking at least a second set of samples from one of said plurality of other images at said known image locations,an element for taking at least a third set of samples from another of said plurality of other images at said known image locations,an element for comparing said first set of samples to said second set of samples and to said third set of samples,an element for determining which of said second and said third set of samples most closely matches said first set.
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Abstract
The apparatus and method described herein shows a system of determining the delay of a delayed version of a sequence of images with respect to a relatively undelayed version. The system operates to take multiple samples of the delayed and undelayed versions at approximately the same sample position on the image and to correlate these samples over multiple image frames to determine which of a plurality of delayed images most closely match a given undelayed image. By knowing which delayed image frame most closely matches a given undelayed image frame it is shown to arrive at a coarse number of frames of delay. A fine delay measurement is achieved by adding a measure of the instantaneous frame to frame delay with respect to a known corresponding feature of the respective video type signals. The invention is also useful for comparing a given image to other images to determine the closest match.
96 Citations
56 Claims
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1. An apparatus for determining the best match between a first image and a plurality of other images, the system comprising in combination:
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an element for selecting known image locations, an element for taking a first set of samples of said first image at said image locations, an element for taking at least a second set of samples from one of said plurality of other images at said known image locations, an element for taking at least a third set of samples from another of said plurality of other images at said known image locations, an element for comparing said first set of samples to said second set of samples and to said third set of samples, an element for determining which of said second and said third set of samples most closely matches said first set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for determining the delay of a delayed version of a sequence of images with respect to a relatively undelayed version, the system comprising in combination:
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a) an element for taking a first set of samples of one of images from one of said delayed or undelayed sequences of images at a plurality of known sample positions, b) an element for taking other sets of samples for each of a plurality of images of the other of said delayed or undelayed sequences at said plurality of known sample positions, c) an element for comparing said first set of samples to said other sets of samples, d) an element for determining which of said other sets of samples most closely matches said first set. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for determining the best match between a first image and a plurality of other images, the system comprising the steps of:
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selecting known image locations, taking a first set of samples of said first images at said image locations, taking at least a second set of samples from one of said plurality of other images at said known image locations, taking at least a third set of samples from another of said plurality of other images at said known image locations, comparing said first set of samples to said second set of samples and to said third set of samples, determining which of said second and said third set of samples most closely matches said first set. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A method for determining the delay of a delayed version of a sequence of images with respect to a relatively undelayed version, the method including the steps of:
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a) taking a first set of samples of one of images from one of said delayed or undelayed sequences of images at a plurality of known sample positions, b) taking a plurality of other sets of samples at said plurality of known sample positions for a plurality of images of the other of said delayed or undelayed sequences, c) comparing said first set of samples to each of said other sets of samples to determine the difference thereof, d) determining which of said other sets of samples most closely matches said first set. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. An apparatus for determining the delay of a delayed version of an image carrying signal with respect to a relatively undelayed version thereof, the system comprising in combination:
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a) an element for taking a first set of samples of at least a first frame from one of said delayed or undelayed signals at a plurality of known sample positions, b) an element for taking other sets of samples for each of a plurality of frames of the other of said delayed or undelayed signal, c) an element for comparing said first set of samples to said other sets of samples, d) an element for determining which of said other sets of samples matches said first set within a known threshold value, e) an element for outputting said delay in response to the matching of said first and other sets of samples. - View Dependent Claims (45, 46, 47, 48, 49)
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44. An apparatus for determining the delay of a delayed version of an image carrying signal with respect to a relatively undelayed version thereof, the system comprising in combination:
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a) an element for taking a first set of samples of at least a first frame from one of said delayed or undelayed signals at a plurality of known sample positions, b) an element for taking other sets of samples for each of a plurality of frames of the other of said delayed or undelayed signal, c) an element for comparing said first set of samples to said other sets of samples, d) an element for determining which of said other sets of samples matches said first set by a known offset value better than any other set, e) an element for outputting said delay in response to the matching of said first and other sets of samples.
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50. A method for determining the delay of a delayed version of an image sequence with respect to a relatively undelayed version thereof, said method comprising the steps of:
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a) taking a first set of samples of at least a first image from one of said delayed or undelayed image sequences at a plurality of known sample locations, b) taking other sets of samples for each of a plurality of images of the other of said delayed or undelayed image sequences, c) comparing said first set of samples to said other sets of samples, d) determining which of said other sets of samples matches said first set of samples, e) outputting said delay in response to the matching of said first and other sets of samples. - View Dependent Claims (51, 52, 53, 54, 55, 56)
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Specification