Ms. Rui Zhou Profile

Rui Zhou

at Zhejiang Univ

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 25 October 2018 Paper

A real-time continuous auto-focus algorithm for stereo microscope cameras

Rui Zhou, Hongyan Ding, Feihong Yu

Proceedings Volume 10822, 108220L (2018) https://doi.org/10.1117/12.2324456

KEYWORDS: Microscopes, Cameras, Image processing, Sensors, Prototyping, Image analysis, Optics, Tracking and scene analysis, Embedded systems

Read Abstract +

Auto-focus is a common function in consumer digital cameras and smart phones, but less applied into stereo microscopes, which often require repeated manual focusing to obtain a clear image. To be less time-consuming and labor-consuming during focusing operation with stereo microscopes, this paper presents a real-time and feasible continuous auto-focus algorithm. Firstly, a direction decision method is proposed to determine the beginning direction of motor for sensor moving. Secondly, an auto-focus search algorithm is improved to find the best focus position. Thirdly, in order to guarantee higher efficiency and accuracy of motor movement, an adaptive step size method is introduced to optimize the value of focus objective function. Lastly, to meet the need of continuous auto-focus, an auto-focus monitoring algorithm utilizing a finite-state-machine model is proposed to determine when to refocus and enhance the stability and responsiveness of auto-focus system. This approach has been implemented on the prototype of our stereo microscope camera to verify the auto-focus performance. Experimental results show that the proposed auto-focus algorithm can almost resist the interference in the focusing process, and achieve a good balance between accuracy and efficiency.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years