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Design of Convolution Kernels
Linköping University, Department of Electrical Engineering, Computer Vision. Linköping University, The Institute of Technology.
1982 (English)Report (Other academic)
Abstract [en]

Operators for extraction of local information are essential components in an image processing system. This paper concentrates on the design and evaluation of convolution kernel sets enabling easy estimation of local orientation and frequency.

Consideration of interpolation properties and the limiting effects of the uncertainty principle leads to the definition of an "i deal" quadrature filter function. An optimization procedure is utilized to produce pairs of convolution kernels which implement an approximation of the desired function. A number of optimization results are presented.

To evaluate the performance of the optimized kernels in an image processing task, a series of experiments have been carried out. Examples are given of local orientation and frequency estimates for images with different signal to noise ratios. An angle deviation measure is defined and avector averaging scheme is introduced to increase angle estimation accuracy. Using a OdB SNR testimage, orientation estimates are produced having an expected deviation of less than 7 degrees.

Place, publisher, year, edition, pages
1982. , 61 p.
Series
LiTH-ISY-I, ISSN 8765-4321 ; 0557
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-56437ISRN: LiTH-ISY-I-0557OAI: oai:DiVA.org:liu-56437DiVA: diva2:319074
Available from: 2010-05-12 Created: 2010-05-12 Last updated: 2010-05-12Bibliographically approved
In thesis
1. Filtering and reconstruction in image processing
Open this publication in new window or tab >>Filtering and reconstruction in image processing
1982 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Image processing is a broad field posing a wide range of problems. The Work presented in this dissertation is mainly concerned with filter design subjectto different criteria and constraints.

The first part describes the development of a new radiographic reconstruction method designated Ectomography. The method is novel in that it allows reconstruction of an arbitrarily thick layer of an object using limited viewing angle.

The subject of the second partis estimation and filtering of local image information. Quadrature filters are designed enabling accurate orientation and frequency estimates. The extracted information is shown to provide a good basis fo r efficient image enhancement and coding procedures.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 1982. 11 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 88
Keyword
Ectomography, Radiographic reconstruction method, Image processing, Elektronik
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-54890 (URN)91-7372-595-1 (ISBN)
Public defence
1982-12-17, C3, Hus C, Campus Valla, Linköpings universitet, Linköping, 09:15 (English)
Supervisors
Available from: 2010-04-19 Created: 2010-04-19 Last updated: 2013-08-28Bibliographically approved

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Citation style
  • apa
  • harvard1
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More styles
Language
  • de-DE
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  • sv-SE
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Output format
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