Results 151 to 160 of about 5,019 (188)
Some of the next articles are maybe not open access.
Antialiasing the Hough transform
CVGIP: Graphical Models and Image Processing, 1991Abstract The discretization of the Hough transform parameter plane is considered. It is shown that the popular accumulator method implies sampling of a nonbandlimited signal. The resultant aliasing accounts for several familiar difficulties in the algorithm. Bandlimiting the parameter plane would allow Nyquist sampling, thus aliasing could be avoided.
Nahum Kiryati, Alfred M. Bruckstein
openaire +1 more source
Parametrization of the Hough Transform
1989The Hough transform is used in picture processing for detecting linear structures in binary images. It associates to each line running through the image the integral along this line of the gray value function. There are many different possibilities for parametrizing lines in the plane and, depending on the applications under consideration, there exist ...
Ulrich Eckhardt, Gerd Maderlechner
openaire +1 more source
Performance prediction of the hough transform
Journal of Computer Science and Technology, 1997zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhanyi Hu, Songde Ma
openaire +2 more sources
On the hough transform of a polygon
Pattern Recognition Letters, 1996It was recently shown that the Hough transform of a convex polygon uniquely determines it. In this note we generalize this result and lend further insight into why a non-convex polygon is, in general, not uniquely determined by its Hough transform.
openaire +2 more sources
Probabilistic approach to the Hough transform
Image and Vision Computing, 1990Abstract It is shown that there is a strong relationship between the Hough transform and the maximum likelihood method. The Probabilistic Hough Transform (PHT), a mathematically ‘correct’ form of the Hough transform, is defined as a likelihood function in the output parameters.
openaire +1 more source
Diagonal quantization for the Hough transform
Pattern Recognition Letters, 1993Abstract Selecting the proper quantization intervals of the Parameter Space (PS) can improve the accuracy and efficiency of the Hough Transform (HT) for image processing. This paper proposes a technique to generally define the quantization intervals of the PS for any parameterization of a line by considering only the greatest tolerance of the y or x ...
Dennis N. K. Leung +2 more
openaire +1 more source
A fresh look at the Hough transform
Pattern Recognition Letters, 1996In this paper we have taken a fresh look at the process of accumulation in the Hough Transform to show that for certain quantizations of the parameter space, the set of points in an image that accumulate a given accumulator bin belong to a discrete straight line.
AGRAWAL, RC +2 more
openaire +3 more sources
A new definition of the Hough transform
Journal of Computer Science and Technology, 1998zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhanyi Hu, Wei Wang, Yi Yang, Songde Ma
openaire +3 more sources
Hough Transform on Reconfigurable Meshes
Computer Vision and Image Understanding, 1995Abstract The Hough transform is an important image processing operation. Given an N × N digital image, we first present a parallel algorithm for computing the Hough transform in O((p/k) log N) time on a reconfigurable mesh of O(kN2) processors, 1 ≤ k ≤ p, where p is the number of angles to be considered.
Chung, K.L., H.Y.Lin
openaire +2 more sources
A comparison between the standard Hough Transform and the Mahalanobis distance Hough Transform
1994The Hough Transform is a class of medium-level vision techniques generally recognised as a robust way to detect geometric features from a 2D image. This paper presents two related techniques. First, a new Hough function is proposed based on a Mahalanobis distance measure that incorporates a formal stochastic model for measurement and model noise. Thus,
Chengping Xu, Sergio A. Velastin
openaire +2 more sources