Disparity servoing based fast autofocusing method for stereomicroscope

• Autorzy: Liu Y. , Yu M. , Cui L. , Jiang G. , Wang G. , Fan S.

Identyfikatory

DOI

10.5277/oa160412

• Języki publikacji: EN

Abstrakty

EN

A disparity servoing based fast autofocusing method is proposed for stereomicroscopes according to linear relationship between the disparity change in stereomicroscopic images and the move distance of a motorized translation stage. For a certain stereomicroscope, the calibration of a disparity range of clear images at each magnification is implemented offline. After that, the disparity of the stereomicroscopic image is used as an index to represent the sharpness of an arbitrary image. If the disparity does not satisfy the requirement, move steps and direction of a step motor are calculated by utilizing the linear relationship between the disparity change and the move distance of the stage. The iteration will be continued until the disparity of the captured stereomicroscopic image approximates to the clearest disparity. The experimental results show that the proposed method only requires a few iterations and less time to reach the focus position, and the disparity error is less than 0.5 pixel.

Słowa kluczowe

EN

autofocusing; stereomicroscope; stereomicroscopic images; disparity

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2016
• Tom: Vol. 46, nr 4
• Strony: 651--663
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Liu Y.

• Department of Information Science and Engineering, Ningbo University, Ningbo, China

autor

Yu M.

• Department of Information Science and Engineering, Ningbo University, Ningbo, China

autor

Cui L.

• Department of Information Science and Engineering, Ningbo University, Ningbo, China

autor

Jiang G.

• Department of Information Science and Engineering, Ningbo University, Ningbo, China

autor

Wang G.

• Department of Information Science and Engineering, Ningbo University, Ningbo, China
• Department of Information, Ningbo Institute of Technology, Zhejiang University, Ningbo, China

autor

Fan S.

• Department of Information Science and Engineering, Ningbo University, Ningbo, China
• Department of Information, Ningbo Institute of Technology, Zhejiang University, Ningbo, China

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).