Non-uniformity correction for SLM microscopic images

Authors:
Wei Pei;Yongying Zhu;Chong Liu;Zeyi Xia
Affiliations:
Environmental Science and Engineering College, Dalian Maritime University, 1 Linghai Road, Dalian 116026, PR China;Civil Engineering Department, Dalian Fisheries University, Dalian, PR China;Research Center for Micro-System Technology, Dalian University of Technology, PR China;Research Center for Micro-System Technology, Dalian University of Technology, PR China
Venue:
Image and Vision Computing
Year:
2009

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Abstract

The distributions of irradiance on the image plane decrease away from the center of the image even if the scene is a uniform white field. This crucial problem is posed in SLM microscopic images analyses, such as edge detection and stereo matching. This paper analyses the noise sources based on the structure of SLM, establishes an image model and explores the variation of random noise with various magnifications. Then a non-uniformity correction method which combines a fitting calibration algorithm and an extended vector median filter speeded up with a fast algorithm is used to remove noise. The experimental results demonstrate the validity of our theoretical model and the effectiveness of non-uniformity correction method of the SLM micro stereovision system.