Discrete Circularity Measure
نویسندگان
چکیده
A new circularity measure for discrete objects is introduced and an algorithm to compute this measure is presented. This measure equals 0 for all discrete circles and is strictly positive for all discrete objects which are not discrete circles.
منابع مشابه
Circularity of objects in images
The most commonly used measure of circularity of objects in images is shown to give incorrect results. An alternative measure of circularity based on the distance between a set and a discrete disk is described. The alternative measure gives circularity zero (distance zero) for discrete disks and values in the range (0,1] for discrete sets which are not disks.
متن کاملA Hu Invariant as a Shape Circularity Measure
In this paper we propose a new circularity measure which defines the degree to which a shape differs from a perfect circle. The new measure is easy to compute and being area based, is robust – e.g., with respect to noise or narrow intrusions. Also, it satisfies the following desirable properties: – it ranges over (0, 1] and gives the measured circularity equal to 1 if and only if the measured s...
متن کاملTest and Measure of Circularity for Digital Curves
We propose one geometric algorithm to solve both the problem of circularity test and the problem of circularity measure. The former problem consists in deciding whether a given digital curve is a digitization of a circle or not, whereas the latter problem consists in measuring how far a given digital curve is from a digitization of a circle. Our new circularity measure fulfills basic invarian...
متن کاملShape circularity measure method based on radial moments
In this note we show that the, so called, circularity measures based on radial moments , as defined in [1], are a particular case of the circularity measures introduced by [2].
متن کاملSolving the Permutation and Circularity Problems of Frequency-Domain Blind Source Separation
Blind source separation (BSS) for convolutive mixtures can be performed efficiently in the frequency domain, where independent component analysis (ICA) is applied separately in each frequency bin. However, frequencydomain BSS involves two major problems that must be solved. The first is the permutation problem: the permutation ambiguity of ICA should be aligned so that a separated signal in the...
متن کامل