Discrimination of point-like objects in astronomical images using surface curvature
نویسندگان
چکیده
منابع مشابه
Automated Classification of Astronomical Objects in Multispectral Wide-Field Images
In this paper we present an automated method for classifying astronomical objects in multispectral wide-field images. The method is divided into three main tasks. The first one consists of locating and matching the objects in the multispectral images. In the second task we create a new representation for each astronomical object using its multispectral images, and also we find a set of features...
متن کاملSuboptimal threshold estimation for detection of point-like objects in radar images
There are many methods for detection of point-like features in gray-leveled bitmap images. The problem of defining a threshold for acceptance or rejection of the results is usually neglected or left to experts. In this paper, a novel method of estimating suboptimal detection threshold values is proposed. It is based on overlapping the results of two or three different methods parametrized with ...
متن کاملGreedy Deconvolution of Point-like Objects
The orthogonal matching pursuit (OMP) is an algorithm to solve sparse approximation problems. In [1] a sufficient condition for exact recovery is derived, in [2] the authors transfer it to noisy signals. We will use OMP for reconstruction of an inverse problem, namely the deconvolution problem. In sparse approximation problems one often has to deal with the problem of redundancy of a dictionary...
متن کاملTactile Discrimination of Surface Curvature and Shape by the Octopus
Octopuses can readily be taught to distinguish between objects that differ in surface texture, or in taste. But they cannot be taught to recognize the distribution of irregularities on the surface of objects, or to discriminate between objects that differ only in weight (Wells, 1961a, 19636, Wells & Wells, 1956, 1957). In visual experiments the animals can recognize the orientation of things th...
متن کاملRecognition of Occluded Objects Using Curvature
New approaches of object representation reliable for partially occluded objects recognition are introduced in this article. Objects are represented by their boundaries, which are deformed by the occlusion. The boundary representation was made by approximation with circle arcs. The representation was designed to be local and robust to occlusion. The curve approximation with circle arcs is equiva...
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: Astronomy and Astrophysics Supplement Series
سال: 1998
ISSN: 0365-0138,1286-4846
DOI: 10.1051/aas:1998122