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Chen et al., 2002 - Google Patents

Automatic detection of signs with affine transformation

Chen et al., 2002

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Document ID
6669474408179108411
Author
Chen X
Yang J
Zhang J
Waibel A
Publication year
Publication venue
Sixth IEEE Workshop on Applications of Computer Vision, 2002.(WACV 2002). Proceedings.

External Links

Snippet

In this paper, we propose an approach for detecting signs from natural scenes. The approach efficiently embeds multiresolution, adaptive search, and affine rectification algorithms in a hierarchical framework, with different emphases at each layer. We combine …
Continue reading at www.academia.edu (PDF) (other versions)

Classifications

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    • G06K9/00—Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/20—Image acquisition
    • G06K9/32—Aligning or centering of the image pick-up or image-field
    • G06K9/3233—Determination of region of interest
    • G06K9/325—Detection of text region in scene imagery, real life image or Web pages, e.g. licenses plates, captions on TV images
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING; COUNTING
    • G06K—RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
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    • G06K9/32—Aligning or centering of the image pick-up or image-field
    • G06K9/3275—Inclination (skew) detection or correction of characters or of image to be recognised
    • G06K9/3283—Inclination (skew) detection or correction of characters or of image to be recognised of characters or characters lines
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING; COUNTING
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    • G06K9/46—Extraction of features or characteristics of the image
    • G—PHYSICS
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    • G06K9/62—Methods or arrangements for recognition using electronic means
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    • G06K9/6202—Comparing pixel values or logical combinations thereof, or feature values having positional relevance, e.g. template matching
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    • G06K9/22—Image acquisition using hand-held instruments
    • G06K9/228—Hand-held scanners; Optical wands
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    • G06K9/00—Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/00221—Acquiring or recognising human faces, facial parts, facial sketches, facial expressions
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    • G06K9/00442—Document analysis and understanding; Document recognition
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    • G06K9/00597—Acquiring or recognising eyes, e.g. iris verification
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    • G06F17/30784—Information retrieval; Database structures therefor; File system structures therefor of video data using features automatically derived from the video content, e.g. descriptors, fingerprints, signatures, genre
    • G06F17/30799—Information retrieval; Database structures therefor; File system structures therefor of video data using features automatically derived from the video content, e.g. descriptors, fingerprints, signatures, genre using low-level visual features of the video content

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