0

Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Optimizing the depth of field for short object distance of capsule endoscope

[+] Author Affiliations
Mang Ou-Yang, Shih-Wei Huang, Wei-Kai Su, Han-Ming Feng, Zhao-Yu Chen

National Central Univ. (Taiwan)

Hsien-Ming Wu

Chung-Shan Institute of Science & Technology (Taiwan)

Yi-Ting Kuo

Jen-The Junior College of Medicine (Taiwan)

Proc. SPIE 6859, Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues VI, 68591Q (February 29, 2008); doi:10.1117/12.762504
Text Size: A A A
From Conference Volume 6859

  • Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues VI
  • Daniel L. Farkas; Dan V. Nicolau; Robert C. Leif
  • San Jose, CA | January 19, 2008

abstract

Research of depth of field (DOF) for capsule endoscope is important for the reason that the shapes of the object plane of the intestine or the stomach are curve surfaces of "<" shape or "c" shape. The depth of field is dependent on following factors: focal length, circle of confusion, aperture, and subject distance. The first three factors are improved for wide view angle in prior paper and determined by the chosen sensor, and it is not going against depth of field. Last factor, subject distance, is the more freedom to enlarge the depth of field. However, depth of field is the range between near depth of field limit and far depth of field limit that are acceptably sharp. The fraction of the depth of field behind the focus is always large then the one in front of the focus distance. The depth of field does change with object distance, and it is increasing as object distance is increasing. But the object distance of the design for capsule endoscope is short. The object distance setting in front of the dorm is more efficient to use the depth of field than the one setting at the dome top. Therefore there is an appropriate design of object distance to make depth of field be used efficiently to inspect curve surface of intestine and stomach. The more vision information of inspect digestive system is get and is compared easily to diagnose patients' condition under wide and efficient range of depth of field.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Mang Ou-Yang ; Shih-Wei Huang ; Wei-Kai Su ; Han-Ming Feng ; Zhao-Yu Chen, et al.
"Optimizing the depth of field for short object distance of capsule endoscope", Proc. SPIE 6859, Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues VI, 68591Q (February 29, 2008); doi:10.1117/12.762504; http://dx.doi.org/10.1117/12.762504


Access This Article
Sign In to Access Full Content
Please Wait... Processing your request... Please Wait.
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
 

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


Buy this article ($18 for members, $25 for non-members).
Sign In