EP0472782A1
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EP
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Method of localizing an extreme amplitude value in multivalued amplitude data field and apparatus for performing the method
Assignee: Koninklijke Philips NV
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Filing: 1990-08-27
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Granted: —
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Expires: 2010-08-27
Abstract
Abstract A method of localizing an extreme amplitude value (maximum or minimum) in a multivalued-amplitude data field includes selecting a collection of amplitude values on the basis of location, the comparing of a candidate extreme amplitude value in the collection with a further amplitude value at a predetermined location related to the collection for upon said particular values being equal localizing the extreme at the predetermined location. An apparatus for performing the method preferably uses a rank value filter for selecting the candidate extreme amplitude value.
Inventors
- 👤 Geert Nijholt
- 👤 Johannes Arnoldus Cornelis Bernsen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:40
CPC Classifications
G; G06; G06T; G06T7/00; G06T7/10; G06T7/13
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
Method of localizing an extreme amplitude value in a multivalued-amplitude data field characterized in that the method includes: - selecting on the basis of position within the field a collection of amplitude values according to a predetermined pattern of locations within the field; - determining a candidate extreme amplitude value in the collection on the basis of magnitude; - associating the candidate extreme amplitude value with a further amplitude value in the collection occurring at a predetermined location of the pattern; - associating the further amplitude value with a reference value; - if the candidate extreme value equals the further amplitude value and if the further amplitude value is more extreme than the reference value then confirming that the extreme value occurs at the predetermined location.
Claim 2
Dependent Claim
152 words
Method of localizing an extreme amplitude value in a multivalued-amplitude data field, characterized in that the method includes: - selecting on the basis of position within the field a collection of amplitude values according to a predetermined pattern of locations within the field; - selecting a further location within the field position related to said collection, but not being an element of said collection; - determining a candidate extreme amplitude value in the collection on the basis of magnitude; - associating the candidate extreme amplitude value with a further amplitude value occurring at the further location; - associating the further amplitude value with a reference value; - if the candidate extreme amplitude value equals the further amplitude value or is less extreme than the further amplitude value and if the further amplitude value is more extreme than the reference value then confirming that the extreme amplitude value occurs at the further location.
Claim 3
Dependent Claim
72 words
Method as in Claim 1 or 2 applied to a multi-dimensional (two or more) data field, wherein the collection-selection includes: - selecting a first orientation; - detecting an edge, the detection being represented by coherent pronounced amplitude values occurring in the multivalued amplitude data field, the edge having the first orientation; - establishing on the basis of the first orientation a second orientation to be associated with said predetermined pattern of locations.
Claim 4
Dependent Claim
24 words
Apparatus for performing a method as in Claim 1, 2 or 3 including a rank value filter for determining the candidate extreme amplitude filter.
Claim 5
Dependent Claim
50 words
Apparatus for performing the method as in Claim 3, including: - template matching means for determining a presence of the edge having the first orientation; - collection selection means coupled with the template matching means for selecting said collection according to the predetermined pattern of locations having the second orientation.
References Cited (Backward Citations)
JPS60201484A
Cited
EP0279297A2
Cited
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