Extraction of textual and graphic overlays from video
First Claim
Patent Images
1. A method of extracting overlays from video comprising the steps of detecting at least one potential overlay in a video sequence;
- and verifying that the at least one potential overlay is at least one actual overlay.
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Abstract
A method for extracting textual and graphical overlays from video sequences involves steps of detecting a potential overlay in a video sequence and then verifying that the potential overlay is an actual overlay. Detection of textual overlays involves wavelet decomposition and neural network processing, while detection of graphical overlays involves template matching. Verification of textual and graphical overlays involves spatial and/or temporal verification.
42 Citations
38 Claims
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1. A method of extracting overlays from video comprising the steps of detecting at least one potential overlay in a video sequence;
- and verifying that the at least one potential overlay is at least one actual overlay.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of extracting textual and graphical overlays from video, comprising the steps of:
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detecting at least one potential overlay in a video sequence, said detecting comprising the steps of;
performing wavelet decomposition on the video sequence;
extracting features based on the results of the wavelet decomposition;
performing neural network processing on the extracted features; and
in parallel with said steps of performing wavelet decomposition, extracting features, and performing neural network processing, performing template matching; and
verifying that the at least one potential overlay is at least one actual overlay. - View Dependent Claims (30)
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31. A method of extracting textual overlays from video, comprising the steps of:
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detecting at least one potential overlay in a video sequence, said detecting comprising steps of;
performing wavelet decomposition on the video sequence;
extracting features based on the results of the wavelet decomposition; and
performing neural network processing on the extracted features; and
verifying that the at least one potential overlay is at least one actual overlay. - View Dependent Claims (32, 33, 34)
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35. A method of extracting graphical overlays from video, comprising the steps of:
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detecting at least one potential overlay in a video sequence, said detecting comprising the step of;
performing template matching; and
verifying that the at least one potential overlay is at least one actual overlay, said verifying comprising the step of;
performing frame-to-frame correlation of a potential overlay determined by said detecting step. - View Dependent Claims (36, 37, 38)
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Specification