Visibility Enhancement by Integrating Refocusing and Direct-Global Separation with Contact Imaging

Contact imaging is a compact lensless microscopy technique that allows observation of living cells placed directly on a charge-coupled device sensor. However, captured images exhibit low visibility in general. This work is aimed at integrating computational refocusing and high-frequency illumination...

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Published in:International journal of computer vision 2019-08, Vol.127 (8), p.1162-1174
Main Authors: Kuniyoshi, Fusataka, Funatomi, Takuya, Kubo, Hiroyuki, Sawada, Yoshihide, Kato, Yumiko O., Mukaigawa, Yasuhiro
Format: Article
Language:English
Subjects:
Artificial Intelligence
Charge coupled devices
Computer Imaging
Computer Science
Depth of field
Illumination
Image enhancement
Image Processing and Computer Vision
Image processing systems
Light sources
Low visibility
Pattern Recognition
Pattern Recognition and Graphics
Sensors
Visibility
Vision
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container_issue 8
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container_title International journal of computer vision
container_volume 127
creator Kuniyoshi, Fusataka
Funatomi, Takuya
Kubo, Hiroyuki
Sawada, Yoshihide
Kato, Yumiko O.
Mukaigawa, Yasuhiro
description Contact imaging is a compact lensless microscopy technique that allows observation of living cells placed directly on a charge-coupled device sensor. However, captured images exhibit low visibility in general. This work is aimed at integrating computational refocusing and high-frequency illumination into contact imaging to enhance the visibility of the captured images. Refocusing contributes to the synthesis of shallow depth-of-field images from the light field captured by moving a point light source. The visibility may be enhanced via high-frequency illumination. Naïve integration of both techniques requires several observations. Therefore, we propose an efficient integration from reduced observations by reformulating the computational refocusing applied in contact imaging. Furthermore, we developed a prototype system that demonstrates the effectiveness of the proposed method.
doi_str_mv 10.1007/s11263-019-01173-5
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subjects Artificial Intelligence
Charge coupled devices
Computer Imaging
Computer Science
Depth of field
Illumination
Image enhancement
Image Processing and Computer Vision
Image processing systems
Light sources
Low visibility
Pattern Recognition
Pattern Recognition and Graphics
Sensors
Visibility
Vision
title Visibility Enhancement by Integrating Refocusing and Direct-Global Separation with Contact Imaging
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