Digital image processing method in particular for satellite images
First Claim
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1. Method of processing digital images acquired by the detection of electromagnetic waves, characterised in that it comprises the following steps:
- a) recovering (10) image data (eij) relating to constituent elements of an initial image, b) applying (12) at least one spectral transformation (FFT, DCT) to at least some of the image elements, c) in the case of at least some of these elements, applying (16) to the transforms (aij) of the elements an overall statistical modelling (M) which can be set to parameters, and d) comparing (22) the modelled transforms (aijqw0) with the initial transforms (aij) in order to obtain a close approximation of at least one parameter (q, w0, α
, μ
, σ
) which comes into play in the statistical model applied.
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Abstract
The invention concerns processing of digital images, captured by detection of electromagnetic waves, such as satellite pictures. The inventive processing consists in applying a parameterable fractal modelling (M) to Fourier transforms of the pixels of the image and comparing (22) the thus modelled transforms (aijq, wo) to the initial transforms (aij) to bring the parameters (q, w0) closer to the fractal model, and if required, the parameters (α,μ,σ) of a transfer function of the instrument which has captured the image.
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27 Claims
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1. Method of processing digital images acquired by the detection of electromagnetic waves, characterised in that it comprises the following steps:
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a) recovering (10) image data (eij) relating to constituent elements of an initial image, b) applying (12) at least one spectral transformation (FFT, DCT) to at least some of the image elements, c) in the case of at least some of these elements, applying (16) to the transforms (aij) of the elements an overall statistical modelling (M) which can be set to parameters, and d) comparing (22) the modelled transforms (aijqw0) with the initial transforms (aij) in order to obtain a close approximation of at least one parameter (q, w0, α
, μ
, σ
) which comes into play in the statistical model applied. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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