CA2249140A1 - Method and apparatus for object detection and background removal - Google Patents

Method and apparatus for object detection and background removal

Info

Publication number
CA2249140A1
CA2249140A1 CA002249140A CA2249140A CA2249140A1 CA 2249140 A1 CA2249140 A1 CA 2249140A1 CA 002249140 A CA002249140 A CA 002249140A CA 2249140 A CA2249140 A CA 2249140A CA 2249140 A1 CA2249140 A1 CA 2249140A1
Authority
CA
Canada
Prior art keywords
sectional image
background
standard deviation
measure
sectional
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
CA002249140A
Other languages
French (fr)
Other versions
CA2249140C (en
Inventor
Shizuo Sakamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of CA2249140A1 publication Critical patent/CA2249140A1/en
Application granted granted Critical
Publication of CA2249140C publication Critical patent/CA2249140C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/11—Region-based segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/194—Segmentation; Edge detection involving foreground-background segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/10—Terrestrial scenes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20021—Dividing image into blocks, subimages or windows

Abstract

A method and apparatus is provided for object detection and background removal, and also storage media for storing a program which enables automatic detection of an object minutely and with high precision for obtaining an outline. A
sectional image statistic calculation measure calculates a mean value and standard deviation of characteristic value of brightness of the sectional image, with the input image being subjected to division processing into sectional image. A
background sectional image selection measure causes a sectional image whose standard deviation is the smallest value in the sectional images to be taken as the sectional image with a high probability of including only the background. A background statistic estimation measure investigates the sectional image, including only the background, and another sectional image under the relationship between the mean value and the standard deviation. This investigation is implemented in terms of whole sectional images, a threshold generation object detection and background removal measure discriminates the background and the detected target object based on predetermined calculation procedure. A second threshold is in use, and is obtained in such a way that the standard deviation multiplied by the constant number given beforehand from the mean value is added thereto.
CA002249140A 1997-10-03 1998-10-01 Method and apparatus for object detection and background removal Expired - Fee Related CA2249140C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP09270684A JP3114668B2 (en) 1997-10-03 1997-10-03 Object detection / background removal method, apparatus, and recording medium recording program
JP9-270684 1997-10-03

Publications (2)

Publication Number Publication Date
CA2249140A1 true CA2249140A1 (en) 1999-04-03
CA2249140C CA2249140C (en) 2002-08-27

Family

ID=17489517

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002249140A Expired - Fee Related CA2249140C (en) 1997-10-03 1998-10-01 Method and apparatus for object detection and background removal

Country Status (3)

Country Link
US (2) US6333993B1 (en)
JP (1) JP3114668B2 (en)
CA (1) CA2249140C (en)

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Also Published As

Publication number Publication date
US6603880B2 (en) 2003-08-05
US20020039443A1 (en) 2002-04-04
JP3114668B2 (en) 2000-12-04
US6333993B1 (en) 2001-12-25
JPH11110559A (en) 1999-04-23
CA2249140C (en) 2002-08-27

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