Method and apparatus for processing an image
First Claim
1. A method of detecting signs in an image comprising the steps of:
- a) providing a multiplicity of sign images;
b) computing the MSER of each said sign image to provide a template database;
c) computing the affine coordinate system of each said template database image MSER;
d) computing a normalized image of each said template database image MSER;
e) providing a digitized input image believed to contain sign image elements;
f) computing the MSER of each said sign image element to provide a set of input image MSERs;
g) computing the affine coordinate system of each said input image MSER;
h) computing a normalized image of each said input image MSER;
i) comparing each template database image MSER with each input image MSER in turn until at least one match is obtained with the best match being selected in the case of multiple matches occurring.
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Abstract
There is provided an efficient, fast image processing apparatus with low error probability for rapidly scrutinizing a digitized video image frame and processing said image frame to detect and characterize features of interest while ignoring other features of said image frame. There is further provided an efficient fast image processing method with low error probability for rapidly scrutinizing a digitized video image frame and processing said image frame to detect and characterize features of interest while ignoring other features of said image frame. In a first embodiment of the invention an image processing apparatus comprises an imaging device coupled to a digital electronic image processor. Video data from the imaging device is linked to a location data source. Objects of interest in a scene are identified by comparing computed Maximally Stable Extremal Regions (MSERs) of captured images with MSERs of images of objects contained in a object template database.
70 Citations
17 Claims
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1. A method of detecting signs in an image comprising the steps of:
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a) providing a multiplicity of sign images; b) computing the MSER of each said sign image to provide a template database; c) computing the affine coordinate system of each said template database image MSER; d) computing a normalized image of each said template database image MSER; e) providing a digitized input image believed to contain sign image elements; f) computing the MSER of each said sign image element to provide a set of input image MSERs; g) computing the affine coordinate system of each said input image MSER; h) computing a normalized image of each said input image MSER; i) comparing each template database image MSER with each input image MSER in turn until at least one match is obtained with the best match being selected in the case of multiple matches occurring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification