Detecting circular shapes from areal images using median filter and CHT

Masoud Nosrati; Ronak Karimi

Detecting circular shapes from areal images using median filter and CHT

Masoud Nosrati * §

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Ronak Karimi

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Detecting circular shapes from areal images using median filter and CHT

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Abstract

One of the challenging topics in image processing is extracting the shapes from noisy backgrounds. There are some methods for doing it from different kinds of noisy backgrounds. In this paper, we are going to introduce another method by using 4 steps to extract circular shapes from impulse noisy backgrounds. First step is applying median filter to disappear “salt and pepper” noise. This step causes edge smoothing. So, as the second step, a laplacian sharpening spatial filter should be applied. It highlights fine details and enhances the blurred edges. Using these two steps sequentially causes noise reduction in an impressive way. Third step is using Canny edge detection for segmenting the image. Its algorithm is talked during the paper. Finally, forth step is applying Circular Hough Transform (CHT) for detecting the circles in image. At the end of paper different use cases of this method is investigated.

References

12 Cites in Article

Reference Format

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Mohamed Rizon,Haniza Yazid,Puteh Saad,Ali Md Shakaff,Abdul Saad,Masanori Sugisaka,Sazali Yaacob,M Mamat,M Karthigaya (2005). Object Detection using Circular Hough Transform.
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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Masoud Nosrati, Ronak Karimi. 1970. "Detecting circular shapes from areal images using median filter and CHT". Global Journal of Computer Science and Technology GJCST Volume 12 (GJCST Volume 12 Issue 2).

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GJCST Volume 12 Issue 2

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Journal Specifications

Crossref Journal DOI 10.17406/gjcst

Print ISSN 0975-4350

e-ISSN 0975-4172

Keywords

Extracting circular shape • median filter • laplacian filter • Canny edge detection • Circular Hough Transform (CHT)

Classification

GJCST Classification I.4

I.4.3

Submission ReceivedApril 9, 2012
Peer Review Double Blind
Handling Editor
Accepted May 5, 2012
Published May 15, 2012

Version of record

v1.2

Issue date

February 6, 2012

Language

English

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Article Matrices

Total Score: 128

Country: Iran

Subject: Global Journal of Computer Science and Technology

Authors: Dr. Masoud Nosrati,Ronak Karimi,Mehdi Hariri (PhD/Dr. count: 1)

View Count (all-time): 228

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Publish Date: 2012 05, Tue

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Total Views: 7.1K

Total Downloads: 576

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