CA2307439A1 - Method and apparatus for evaluating a scale factor and a rotation angle in image processing - Google Patents

Method and apparatus for evaluating a scale factor and a rotation angle in image processing Download PDF

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Publication number
CA2307439A1
CA2307439A1 CA002307439A CA2307439A CA2307439A1 CA 2307439 A1 CA2307439 A1 CA 2307439A1 CA 002307439 A CA002307439 A CA 002307439A CA 2307439 A CA2307439 A CA 2307439A CA 2307439 A1 CA2307439 A1 CA 2307439A1
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CA
Canada
Prior art keywords
scaled
images
rotation angle
image processing
scale factor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002307439A
Other languages
French (fr)
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CA2307439C (en
Inventor
Alain Bergeron
Michel Doucet
Donald Prevost
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Institut National dOptique
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Institut National dOptique
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Publication date
Application filed by Institut National dOptique filed Critical Institut National dOptique
Priority to CA002307439A priority Critical patent/CA2307439C/en
Priority to EP01401076A priority patent/EP1152371A3/en
Publication of CA2307439A1 publication Critical patent/CA2307439A1/en
Application granted granted Critical
Publication of CA2307439C publication Critical patent/CA2307439C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/60—Analysis of geometric attributes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/70—Determining position or orientation of objects or cameras
    • G06T7/73—Determining position or orientation of objects or cameras using feature-based methods
    • G06T7/74—Determining position or orientation of objects or cameras using feature-based methods involving reference images or patches
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/88—Image or video recognition using optical means, e.g. reference filters, holographic masks, frequency domain filters or spatial domain filters

Abstract

The present invention concerns a method for evaluating a scale factor and a rotation angle in image processing and more particularly digital image processing. The method includes the steps of first providing an input image, an then reducing the input image to provide a smaller image. The smaller image is scaled according to a plurality of factors to produce a plurality of scaled images and is also rotated according to a plurality of factors to produce a plurality of rotated images. The scaled images in the rotated images are then placed into a mosaic which is arranged by scale and rotation. A referenced template is provided and the referenced template is correlated with the mosaic of scaled and rotated images to provide a scale factor and a rotation angle based on the position in the mosaic of the high score relation value between the reference template and the scaled and rotated images. The method is more efficient in that it reduces the amount of computations required to obtain useful results. The method also does not require object centering prior to performing the analysis and does not require complex mathematical expansion of the object under analysis.
CA002307439A 2000-05-02 2000-05-02 Method and apparatus for evaluating a scale factor and a rotation angle in image processing Expired - Lifetime CA2307439C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002307439A CA2307439C (en) 2000-05-02 2000-05-02 Method and apparatus for evaluating a scale factor and a rotation angle in image processing
EP01401076A EP1152371A3 (en) 2000-05-02 2001-04-26 Method and apparatus for evaluating a scale factor and a rotation angle in image processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002307439A CA2307439C (en) 2000-05-02 2000-05-02 Method and apparatus for evaluating a scale factor and a rotation angle in image processing

Publications (2)

Publication Number Publication Date
CA2307439A1 true CA2307439A1 (en) 2001-11-02
CA2307439C CA2307439C (en) 2008-07-08

Family

ID=4166065

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002307439A Expired - Lifetime CA2307439C (en) 2000-05-02 2000-05-02 Method and apparatus for evaluating a scale factor and a rotation angle in image processing

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CA (1) CA2307439C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110321908A (en) * 2018-03-29 2019-10-11 华为技术有限公司 Image-recognizing method, terminal device and computer readable storage medium
CN112184764A (en) * 2020-09-10 2021-01-05 太原理工大学 Target tracking method based on Fourier-Mellin transform

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7991242B2 (en) 2005-05-11 2011-08-02 Optosecurity Inc. Apparatus, method and system for screening receptacles and persons, having image distortion correction functionality
CA2608119A1 (en) 2005-05-11 2006-11-16 Optosecurity Inc. Method and system for screening luggage items, cargo containers or persons
US7899232B2 (en) 2006-05-11 2011-03-01 Optosecurity Inc. Method and apparatus for providing threat image projection (TIP) in a luggage screening system, and luggage screening system implementing same
US8494210B2 (en) 2007-03-30 2013-07-23 Optosecurity Inc. User interface for use in security screening providing image enhancement capabilities and apparatus for implementing same
KR102067367B1 (en) 2011-09-07 2020-02-11 라피스캔 시스템스, 인코포레이티드 X-ray inspection method that integrates manifest data with imaging/detection processing
EP3420563A4 (en) 2016-02-22 2020-03-11 Rapiscan Systems, Inc. Systems and methods for detecting threats and contraband in cargo

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110321908A (en) * 2018-03-29 2019-10-11 华为技术有限公司 Image-recognizing method, terminal device and computer readable storage medium
CN112184764A (en) * 2020-09-10 2021-01-05 太原理工大学 Target tracking method based on Fourier-Mellin transform

Also Published As

Publication number Publication date
CA2307439C (en) 2008-07-08

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