VIDEO TEXT PROCESSING APPARATUS
First Claim
Patent Images
1. A text extraction apparatus that extracts at least one text line region from a given image, said apparatus comprising:
- an edge image generation unit generating edge information of the given image;
a stroke image generation unit generating a binary image of candidate character strokes in the given image by using the edge information;
a stroke filtering unit removing a false stroke from the binary image by using the edge information;
a text line region formation unit combining a plurality of strokes into a text line region;
a text line verification unit removing a false character stroke from the text line region and reforming the text line region;
a text line binarization unit binarizing the text line region by using a height of the text line region; and
an output unit outputting a binary image of the text line region.
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Abstract
Video frames that contain text areas are selected from given video frames by removing redundant frames and non-text frames, the text areas in the selected frames are located by removing false strokes, and text lines in the text areas are extracted and binarized.
37 Citations
17 Claims
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1. A text extraction apparatus that extracts at least one text line region from a given image, said apparatus comprising:
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an edge image generation unit generating edge information of the given image; a stroke image generation unit generating a binary image of candidate character strokes in the given image by using the edge information; a stroke filtering unit removing a false stroke from the binary image by using the edge information; a text line region formation unit combining a plurality of strokes into a text line region; a text line verification unit removing a false character stroke from the text line region and reforming the text line region; a text line binarization unit binarizing the text line region by using a height of the text line region; and an output unit outputting a binary image of the text line region. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A text extraction apparatus that extracts at least one text line region from a given image, said apparatus comprising:
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an edge image generation unit generating an edge image of the given image; a stroke image generation unit generating a binary image of candidate character strokes in the given image by using the edge image; a stroke filtering unit checking an overlap rate of a contour of a stroke in the binary image of the candidate character strokes by pixels indicating an edge in the edge image, determining that the stroke is a valid stroke if the overlap rate is greater than a predefined threshold and an invalid stroke if the overlap rate is less than the predefined threshold, and removing the invalid stroke; and an output unit outputting information of remaining strokes in the binary image of the candidate character strokes.
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9. A computer-readable storage medium storing a program used to direct a computer, that extracts at least one text line region from a given image, to perform a process comprising:
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generating edge information of the given image; generating a binary image of candidate character strokes in the given image by using the edge information; removing a false stroke from the binary image by using the edge information; combining a plurality of strokes into a text line region; removing a false character stroke from the text line region and reforming the text line region; binarizing the text line region by using a height of the text line region; and outputting a binary image of the text line region. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A computer-readable storage medium storing a program used to direct a computer, that extracts at least one text line region from a given image, to perform a process comprising:
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generating an edge image of the given image; generating a binary image of candidate character strokes in the given image by using the edge image; checking an overlap rate of a contour of a stroke in the binary image of the candidate character strokes by pixels indicating an edge in the edge image; determining that the stroke is a valid stroke if the overlap rate is greater than a predefined threshold and an invalid stroke if the overlap rate is less than the predefined threshold; removing the invalid stroke; and outputting information of remaining strokes in the binary image of the candidate character strokes.
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17. A text extraction method for extracting at least one text line region from a given image, said method comprising:
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generating edge information of the given image; generating a binary image of candidate character strokes in the given image by using the edge information; removing a false stroke from the binary image using the edge information; combining a plurality of strokes into a text line region; removing a false character stroke from the text line region and reforming the text line region; binarizing the text line region by using a height of the text line region; and presenting a binary image of the text line region.
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Specification