نتایج جستجو برای: circular hough transform

تعداد نتایج: 181771  

2013
Tara Ferguson

This paper contains a brief literature survey of applications and improvements of the Hough transform, a description of the Hough transform and a few of its algorithms, and simulation examples of line and curve detection using the Hough transform.

Journal: :Pattern Recognition 1992
Suchendra M. Bhandarkar Minsoo Suk

-In this paper we show how the use of qualitative features can enhance the performance of recognition and localization techniques, in particular, the Generalized Hough Transform. Qualitative features (i.e. scene features with qualitative attributes assigned to them) are shown to be effective in pruning the search space of possible scene interpretations and also reducing the number of spurious i...

1994
Mohammed Atiquzzaman

Hough transform can be used to detect parametric patterns, such as straight lines and circles, embedded in noisy images. The large amount of storage and computing power required by the Hough transform presents a problem in real-time applications. Multiresolution Hough transform (MHT) very efficient in reducing the computing and storage requirements. In this paper, we show the effectiveness of t...

In this paper, a new iris localization method for mobile devices is presented. Our system uses both intensity and saturation threshold on the captured eye images to determine iris boundary and sclera area, respectively. Estimated iris boundary pixels which have been placed outside the sclera will be removed. The remaining pixels are mainly the boundary of iris inside the sclera. Then, circular ...

Journal: :J. Electronic Imaging 2013
Marco Leo Dario Cazzato Tommaso De Marco Cosimo Distante

A new method to automatically locate pupils in images (even with low resolution) containing near-frontal human faces is presented. In particular, pupils are localized by an unsupervised procedure consisting of two steps: at first, self-similarity information is extracted by considering the appearance variability of local regions, and then it is combined with an estimator of circular shapes base...

2013
Marco Leo Dario Cazzato Tommaso De Marco Cosimo Distante

This paper presents a new method to automatically locate pupils in images (even with low-resolution) containing near-frontal human faces. In particular pupils are localized by an unsupervised procedure consisting of two steps: at first self-similarity information is extracted by considering the appearance variability of local regions and then it is combined with an estimator of circular shapes ...

2000
Shuu Li Masafumi Tominaga Kunihito Kato Kazuhito Murakami Hiroyasu Koshimizu Jun-ichiro Hayashi

We are not free from the side ef'fect caused by the digitization of the image also in Hough transform. Since Hough transform detects lines in the expression of the analog line equation, it is finally needed to extract digital line segments from the analog line equations. In this paper, we propose a new method DTHT(Digita1 Template Hough Transform) to detect digital line segments directly from t...

2014
Amr El-Labban Andrew Zisserman Yusuke Toyoda Anthony Hyman

Understanding the genes involved in cell volume regulation is an important area in biological research. Modern screens involving RNA interference often involve analyzing many thousands of cells, and manual techniques are too slow. We describe a fully automated method for estimating the volume of spherical mitotic cells, within given bounds, based on a learned membrane classifier and a circular ...

2013
Jian Wang Yi Su

Abstract—A GPR object detection algorithm delivers a promising performance using the Hough transform through a high computational load. This paper presents a fast Hough-based algorithm. To reduce the parameter space of the Hough transform, first, two parameters for a reflection hyperbola were estimated using cross correlation between adjacent A-scans. Next, only a 1D Hough transform is necessar...

Journal: :IEEE Trans. Pattern Anal. Mach. Intell. 1999
Anastasios L. Kesidis Nikos Papamarkos

ÐIn this paper, an Inverse Hough Transform algorithm is proposed. This algorithm reconstructs correctly the original image, using only the data of the Hough Transform space and it is applicable to any binary image. As a first application, the Inverse Hough Transform algorithm is used for straight-line detection and filtering. The lines are detected not just as continuous straight lines, which i...

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