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Vision-based Finger Detection and Its Applications

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The document discusses computer vision techniques for finger detection and tracking, and their applications. It presents methods for fingertip detection using background subtraction, morphological operations and principal component analysis. Fingertip tracking is implemented using a Kalman filter. Two interactive systems are described: i-m-Top, a multi-touch tabletop, and MaC Ball, an interactive 3D display using a transparent ball. Both systems allow finger gestures to control digital content.

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Vision-Based Finger Detection and Its Applications 基於電腦視覺之手指偵測及其應用 Yi-Fan Chuang Advisor: Prof. Yi-Ping Hung Prof. Ming-Sui Lee
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Related Work ,[object Object],[object Object],[object Object],[object Object],[object Object],H. KOIKE and Y. KOBAYASHI, “Integrating paper and digital information on enhanceddesk: a method for realtime finger tracking on an augmented desk system,“ ACM Transation Computer-Human Interaction, vol. 8, no. 4, pp. 307-322, 2001.
Related Work ,[object Object],J. Y. Han, “Low-cost multi-touch sensing through frustrated total internal reflection," in Proceedings of the 18th annual ACM symposium on User interface software and technology (UIST '05). New York, NY, USA: ACM Press, 2005, pp. 115-118.
Related Work ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],S. Malik and J. Laszlo, “Visual touchpad: a two-handed gestural input device," in Proceedings of the 6th international conference on Multimodal interfaces (ICMI '04). New York, NY, USA: ACM Press, 2004, pp. 289-296.
Related Work ,[object Object],[object Object],[object Object],A. D. Wilson, “Playanywhere: a compact interactive tabletop projection-vision system," in Proceedings of the 18th annual ACM symposium on User interface software and technology (UIST '05). New York, NY, USA: ACM Press, 2005, pp. 83-92.
Related Work ,[object Object],Our Work: Touch/Hover (1 camera) Multi-user with multi-finger Enhance Desk (CHI 01’) FTIR (UIST 05’) Visual Touchpad (ICMI 04’) PlayAnyWhere (UIST 05’) Method Template matching Connected component analysis Curvature of contour Shadow Detection Touch Touch Touch/Hover (2 cameras) Touch/Hover (1 camera) Disadvantage One user Only touch Only touch One user One finger for one palm
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Overview ,[object Object],[object Object],J. Rekimoto and N. Matsushita, “Perceptual surfaces: Towards a human and object sensitive interactive display," Workshop on Perceptural User Interfaces (PUI'97), 1997. ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],Overview Clear shapes (MaC Ball) Gesture Captured image
[object Object],[object Object],[object Object],[object Object],[object Object],Overview Unclear shapes ( i-m- Top) Gesture Captured image
Overview ,[object Object],[object Object],Detection results Kalman filtering Background subtraction Morphological opening Difference of previous two Principal component analysis Fingertip detection
Fingertip Detection ,[object Object],[object Object],[object Object],(Enhanced image) Background subtraction Morphological opening Difference of previous two PCA Fingertip detection
Fingertip Detection ,[object Object],[object Object],[object Object],Original Morphological opening Finger (Enhanced image) Background subtraction Morphological opening Difference of previous two PCA Fingertip detection
Fingertip Detection ,[object Object],[object Object],Finger direction Possible fingertips’ positions (Enhanced image) Background subtraction Morphological opening Difference of previous two PCA Fingertip detection Background subtraction Morphological opening Difference of previous two PCA Fingertip detection
Fingertip Detection ,[object Object],[object Object],[object Object],[object Object],[object Object],Finger patch Background subtraction Morphological opening Difference of previous two PCA Fingertip detection
Detection Results on i-m- Top (Enhanced image) Separate finger touching and palm hovering Fingertip detection Difference of previous two & PCA Morphological opening Background subtraction
Detection Results on MaC Ball
Fingertip Tracking ,[object Object],[object Object],[object Object],[object Object],[object Object],Original After Kalman filter
Performance Evaluation ,[object Object]
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Hardware Configuration ,[object Object],[object Object],Cooperate with Yi-Wei Chia
Hardware Configuration ,[object Object],[object Object],Cooperate with Yi-Wei Chia
Software Implementation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Palm Detection and Tracking ,[object Object],[object Object],[object Object],[object Object],Palm detection Morphological opening (Palm part) Background subtraction (Enhanced Image)
Association between Fingertips and Palms ,[object Object],[object Object],(Enhanced Image)
Pen Detection and Priority ,[object Object],[object Object],[object Object],[object Object],[object Object]
Events Definitions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Application I: Browsing and Editing ,[object Object],[object Object],[object Object],[object Object],[object Object]
Application II: Video Retrieval System ,[object Object],[object Object],[object Object],[object Object],Video Top button Video plane Video wall Scroll bar
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Magic Crystal Ball (MaC Ball) ,[object Object],[object Object]
Hardware Configuration Display Module Detection Module IR Camera IR Illuminator Pressure Sensors User Transparent Glass Ball Reflection Mirror Fresnel Lens LCD
Software Implementation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Software Implementation ,[object Object],[object Object],p1 p2 p3 p1 p2 p1 p2
Events Definitions ,[object Object],Pointing Gesture Fingertips Detection Motion Detection Motion Detection Fingertips Detection Waving Gesture Pressure sensors Touch / Hover
Application: Virtual Exhibition ,[object Object],[object Object],[object Object],[object Object],[object Object],Video
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Conclusion & Future Work ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Vision-based Finger Detection and Its Applications

  • 1. Vision-Based Finger Detection and Its Applications 基於電腦視覺之手指偵測及其應用 Yi-Fan Chuang Advisor: Prof. Yi-Ping Hung Prof. Ming-Sui Lee
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  • 20. Detection Results on i-m- Top (Enhanced image) Separate finger touching and palm hovering Fingertip detection Difference of previous two & PCA Morphological opening Background subtraction
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  • 36. Hardware Configuration Display Module Detection Module IR Camera IR Illuminator Pressure Sensors User Transparent Glass Ball Reflection Mirror Fresnel Lens LCD
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