Method for generating synthetic key frame based upon video text
First Claim
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1. A method of generating a synthetic key frame of video text, the method comprising the steps of:
- extracting a plurality of text areas from a video stream;
calculating importance measures according to weights for each of the extracted text areas;
selecting the number of text areas to be synthesized based upon the importance measures in the order of higher importance; and
synthesizing the text areas to be synthesized into the key frame.
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Abstract
The present invention generally relates to a multimedia browsing system, and more particularly, to a method for generating a synthetic key frame, which allows a video stream to be efficiently summarized while being searched and filtered based upon the summarization. The present invention generates the synthetic key frame based upon video text by calculating an importance measure of text areas extracted from the video image and using only those text areas having the importance measures of at least a predetermined value.
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20 Claims
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1. A method of generating a synthetic key frame of video text, the method comprising the steps of:
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extracting a plurality of text areas from a video stream;
calculating importance measures according to weights for each of the extracted text areas;
selecting the number of text areas to be synthesized based upon the importance measures in the order of higher importance; and
synthesizing the text areas to be synthesized into the key frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 18, 19, 20)
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13. A method of generating a synthetic key frame of video text, the method comprising the following steps of:
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determining weights for a plurality of text areas based upon weight determining factors;
calculating importance measures of the text areas by applying the weights according to a certain rule;
selecting the number of text areas to be synthesized based upon the importance measures in the order of higher importance; and
synthesizing the text areas to be synthesized into the key frame.
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17. A method of calculating importance measure for generating a synthetic key frame, the method comprising the steps of:
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determining the sizes of weight determining factors;
determining weights based upon the sizes of the weight determining factors; and
adding values obtained by multiplying the weight determining factors with corresponding weights.
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Specification