منابع مشابه
Discrete radon transform
This paper describes the discrete Radon transform (DRT) and the exact inversion algorithm for it. Similar to the discrete Fourier transform (DFT), the DRT is defined for periodic vector-sequences and studied as a transform in its own right. Casting the forward transform as a matrix-vector multiplication, the key observation is that the matrix-although very large-has a block-circulant structure....
متن کاملAlgorithms for an Adaptive Discrete Radon Transform
From the discrete radon transform (DRT), R(t, m) of a p x p image I(x, y), intensity at (t, m) results from the sum of intensities, I of elements, (x, y) along a projection of x = my + t (mod p), the resultant transform of the image presented has an averaging effect. If information is required for a subset of the image, it cannot be extracted from transform of the complete image. It is therefor...
متن کاملTexture Analysis Using Modified Discrete Radon Transform
In this paper, we address the problem of the rotationinvariant texture analysis. For this purpose, we first present a modified version of the discrete Radon transform whose performance, including accuracy and processing time, is significantly better than the conventional transform in direction estimation and categorization of textural images. We then utilize this transform with a rotated versio...
متن کامل3D Fourier based discrete Radon transform
The Radon transform is a fundamental tool in many areas. For example, in reconstruction of an image from its projections (CT scanning). Recently A. Averbuch et al. [SIAM J. Sci. Comput., submitted for publication] developed a coherent discrete definition of the 2D discrete Radon transform for 2D discrete images. The definition in [SIAM J. Sci. Comput., submitted for publication] is shown to be ...
متن کاملGeneralized multi-directional discrete Radon transform
This paper presents a discrete generalized multi-directional Radon transform (GMDRT) and its exact inversion algorithm. GMDRT is an extension of the classical Radon transform. It aims to project parameterized curves and geometric objects following several directions. For this purpose, we propose an algebraic formalism of the Radon Transform presenting the forward transform as a matrix-vector_ m...
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ژورنال
عنوان ژورنال: IEEE Transactions on Acoustics, Speech, and Signal Processing
سال: 1987
ISSN: 0096-3518
DOI: 10.1109/tassp.1987.1165108