Automatic hysteresis of Canny edge detector for lines detection

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43110%2F17%3A43912552" target="_blank" >RIV/62156489:43110/17:43912552 - isvavai.cz</a>

Result on the web

<a href="http://www.magnanimitas.cz/ADALTA/0702/papers/I_juranek.pdf" target="_blank" >http://www.magnanimitas.cz/ADALTA/0702/papers/I_juranek.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Automatic hysteresis of Canny edge detector for lines detection

Original language description

The Canny edge detector is a very popular multi-stage algorithm for image edge detection and its output is frequently used as an input for the Hough transform algorithm for identification of lines. Its crucial step is the edge tracking by hysteresis, which selects the final edges by using two thresholds. The assessment of those two values in an unsupervised way is a difficult task, that is usually solved by application of statistical functions to the values of intensity of the input image converted to grayscale. This paper&apos;s objective is to experimentally prove, that it is more convenient not to use the input image, but instead the gradient image, which is the output of the Sobel gradient operator. The paper also revealed that with using the 2:1 ratio between the upper and lower threshold and the upper threshold to be set around 55 % of the maximum value of gradient image, the line detection reaches much better results.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Ad Alta

ISSN

1804-7890

e-ISSN

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Volume of the periodical

7

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

2

Pages from-to

257-258

UT code for WoS article

000440788500052

EID of the result in the Scopus database

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