WO2013109609A3 - Enhanced contrast for object detection and characterization by optical imaging - Google Patents

Enhanced contrast for object detection and characterization by optical imaging Download PDF

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Publication number
WO2013109609A3
WO2013109609A3 PCT/US2013/021713 US2013021713W WO2013109609A3 WO 2013109609 A3 WO2013109609 A3 WO 2013109609A3 US 2013021713 W US2013021713 W US 2013021713W WO 2013109609 A3 WO2013109609 A3 WO 2013109609A3
Authority
WO
WIPO (PCT)
Prior art keywords
enhanced contrast
characterization
object detection
optical imaging
light source
Prior art date
Application number
PCT/US2013/021713
Other languages
French (fr)
Other versions
WO2013109609A2 (en
Inventor
David HOLZ
Original Assignee
Leap Motion, Inc.
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
Priority claimed from US13/414,485 external-priority patent/US20130182079A1/en
Priority claimed from US13/724,357 external-priority patent/US9070019B2/en
Application filed by Leap Motion, Inc. filed Critical Leap Motion, Inc.
Priority to DE112013000590.5T priority Critical patent/DE112013000590B4/en
Priority to CN201380012276.5A priority patent/CN104145276B/en
Priority to JP2014552391A priority patent/JP2015510169A/en
Publication of WO2013109609A2 publication Critical patent/WO2013109609A2/en
Publication of WO2013109609A3 publication Critical patent/WO2013109609A3/en

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06VIMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/107Static hand or arm
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06VIMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00Arrangements for image or video recognition or understanding
    • G06V10/10Image acquisition
    • G06V10/12Details of acquisition arrangements; Constructional details thereof
    • G06V10/14Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/143Sensing or illuminating at different wavelengths
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06VIMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00Arrangements for image or video recognition or understanding
    • G06V10/10Image acquisition
    • G06V10/12Details of acquisition arrangements; Constructional details thereof
    • G06V10/14Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/145Illumination specially adapted for pattern recognition, e.g. using gratings
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06VIMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00Arrangements for image or video recognition or understanding
    • G06V10/20Image preprocessing
    • G06V10/28Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06VIMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/20Movements or behaviour, e.g. gesture recognition
    • G06V40/28Recognition of hand or arm movements, e.g. recognition of deaf sign language

Abstract

Enhanced contrast between an object of interest and background surfaces visible in an image is provided using controlled lighting directed at the object. Exploiting the falloff of light intensity with distance, a light source (or multiple light sources), such as an infrared light source, can be positioned near one or more cameras to shine light onto the object while the camera(s) capture images. The captured images can be analyzed to distinguish object pixels from background pixels.
PCT/US2013/021713 2012-01-17 2013-01-16 Enhanced contrast for object detection and characterization by optical imaging WO2013109609A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE112013000590.5T DE112013000590B4 (en) 2012-01-17 2013-01-16 Improved contrast for object detection and characterization by optical imaging
CN201380012276.5A CN104145276B (en) 2012-01-17 2013-01-16 Enhanced contrast for object detection and characterization by optical imaging
JP2014552391A JP2015510169A (en) 2012-01-17 2013-01-16 Feature improvement by contrast improvement and optical imaging for object detection

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
US201261587554P 2012-01-17 2012-01-17
US61/587,554 2012-01-17
US13/414,485 US20130182079A1 (en) 2012-01-17 2012-03-07 Motion capture using cross-sections of an object
US13/414,485 2012-03-07
US201261724068P 2012-11-08 2012-11-08
US201261724091P 2012-11-08 2012-11-08
US61/724,068 2012-11-08
US61/724,091 2012-11-08
US13/724,357 US9070019B2 (en) 2012-01-17 2012-12-21 Systems and methods for capturing motion in three-dimensional space
US13/724,357 2012-12-21

Publications (2)

Publication Number Publication Date
WO2013109609A2 WO2013109609A2 (en) 2013-07-25
WO2013109609A3 true WO2013109609A3 (en) 2013-10-31

Family

ID=48799803

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/021713 WO2013109609A2 (en) 2012-01-17 2013-01-16 Enhanced contrast for object detection and characterization by optical imaging

Country Status (4)

Country Link
JP (2) JP2015510169A (en)
CN (2) CN104145276B (en)
DE (1) DE112013000590B4 (en)
WO (1) WO2013109609A2 (en)

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KR20230004905A (en) 2015-11-10 2023-01-06 루미리즈 홀딩 비.브이. Adaptive light source
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US10616550B1 (en) * 2018-09-14 2020-04-07 Facebook Technologies, Llc Generating a representation of an object from depth information determined in parallel from images captured by multiple cameras
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EP3968888A4 (en) * 2019-06-20 2022-10-12 Gentex Corporation Illumination system and method for object tracking
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Also Published As

Publication number Publication date
DE112013000590B4 (en) 2016-05-04
JP2015510169A (en) 2015-04-02
WO2013109609A2 (en) 2013-07-25
DE112013000590T5 (en) 2014-11-06
CN104145276A (en) 2014-11-12
CN104145276B (en) 2017-05-03
CN107066962A (en) 2017-08-18
CN107066962B (en) 2020-08-07
JP2016186793A (en) 2016-10-27

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