Fourier descriptors for broken shapes
نویسندگان
چکیده
منابع مشابه
Fourier descriptors for broken shapes
Fourier descriptors are powerful features for the recognition of two-dimensional connected shapes. In this article, we propose a method to define Fourier descriptors even for broken shapes, i.e. shapes that can have more than one contour. The method is based on the convex hull of the shape and the distance to the closest actual contour point along the convex hull. We define different invariant ...
متن کاملParameterizing Arbitrary Shapes via Fourier Descriptors for Evidence-Gathering Extraction
According to the formulation of the Hough Transform, it is possible to extract any shape that can be represented by an analytic equation with a number of free parameters. Nevertheless, the extraction of arbitrary shapes has centered on nonanalytic representations based on a table which specifies the position of edge points relative to a fixed reference point. In this paper we develop a novel ap...
متن کاملOn the Alignment of Shapes Represented by Fourier Descriptors
The representation of shapes by Fourier descriptors is a time-honored technique that has received relatively little attention lately. Nevertheless, it has its benefits and is suitable for describing a range of medical structures in two dimensions. Delineations in medical applications often consist of continuous outlines of structures, where no information of correspondence between samples exist...
متن کاملReslicing axially sampled 3D shapes using elliptic Fourier descriptors
We propose a new method that interpolates between parallel slices from a 3D shape for the purposes of reslicing and putting into correspondence organ shapes acquired from volumetric medical imagery. By interpolating the coefficients of elliptic Fourier descriptors for a set of parallel contours, a new set of slices can be directly generated at desired axial locations. Neither an explicit corres...
متن کاملFourier Descriptors of Two Dimensional Shapes - Reconstruction and Accuracy
ones proposed in this study give a better reconstruction rate than the G method for the small number of FD's. For the ZR approach the bounds on the deviation between a contour and its approximation Two kinds of Fourier shape descriptors (FD's) are based on the finite number of Fourier coefficients are considered: ZR defined by Zahn and Roskies and G derived. These bounds tell us how many FD's a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: EURASIP Journal on Advances in Signal Processing
سال: 2013
ISSN: 1687-6180
DOI: 10.1186/1687-6180-2013-161