An active zooming method for simultaneous control of field-of-view and depth-of-field in vision-based microassembly

Xiaodong Tao; Farrokh Janabi-Sharifi; Hyungsuck Cho

doi:10.1117/12.754579

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8 October 2007 An active zooming method for simultaneous control of field-of-view and depth-of-field in vision-based microassembly

Xiaodong Tao, Farrokh Janabi-Sharifi, Hyungsuck Cho

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Proceedings Volume 6719, Optomechatronic Systems Control III; 671904 (2007) https://doi.org/10.1117/12.754579
Event: International Symposium on Optomechatronic Technologies, 2007, Lausanne, Switzerland

Abstract

Vision-based techniques used in automatic microassembly are limited by inherent problems such as small depth of focus (DOF) and field of view (FOV). Microassembly operations need, however, initially to detect micro parts in a wide FOV and large DOF yet to maintain high resolution for the final state. This paper proposes an active zooming control method that enables adjustment of the FOV and DOF dynamically according to the position and focus measure of micro objects. The proposed method is based on an artificial potential field with the capability to combine different kinds of constraints such as the FOV, focus measure, and joint limits, into the system. The proposed method can ensure the microscopy to maintain a wide FOV and large DOF initially, and high resolution at the end. Simulation and microassembly experimental results are provided to verify feasibility of the proposed approach.

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Xiaodong Tao, Farrokh Janabi-Sharifi, and Hyungsuck Cho "An active zooming method for simultaneous control of field-of-view and depth-of-field in vision-based microassembly", Proc. SPIE 6719, Optomechatronic Systems Control III, 671904 (8 October 2007); https://doi.org/10.1117/12.754579

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