Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Edge Detection in Radar Images Using Weibull Distribution   Radar images can reveal information about the shape of the surface terrain as
well as its physical and biophysical properties. Radar images have long been
used in geological studies to map structural features that are revealed by the
shape of the landscape. Radar imagery also has applications in vegetation and
crop type mapping, landscape ecology, hydrology, and volcanology. Image
processing is using for detecting for objects in radar images. Edge detection;
which is a method of determining the discontinuities in gray level images; is a
very important initial step in Image processing. Many classical edge detectors
have been developed over time. Some of the well-known edge detection operators
based on the first derivative of the image are Roberts, Prewitt, Sobel which is
traditionally implemented by convolving the image with masks. Also Gaussian
distribution has been used to build masks for the first and second derivative.
However, this distribution has limit to only symmetric shape. This paper will
use to construct the masks, the Weibull distribution which was more general
than Gaussian because it has symmetric and asymmetric shape. The constructed
masks are applied to images and we obtained good results.

36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
3
The categories of this paper are: physics