A Fast and Direct Demodulation Method for Spherical Data

Abstract

The invention discloses a spherical direct demodulation method which includes the following steps: 1 determining size of a spherical window according to view size of a collimator, determining number of sampling points along any side in the spherical window to generate a discretization gridding of a reference window, utilizing the discretization gridding with identical size and shape with the reference window to cover the whole spherical face, utilizing the orthogonal pixel mode to conduct discretization on the spherical face and enabling the spherical face to be scattered into the gridding with equal-distance adjacent pixels, consistent pixel shape and pixel distribution orthogonality; 2 utilizing a clustering algorithm to group different modulation functions of azimuth angle alpha and dividing the modulation kernel function with the value of the azimuth angle located in the clustering range in one group; and 3 utilizing digital approximation based on clustering to achieve acceleration value calculation in the modulation algorithm.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a fast and direct demodulation method suitable for spherical data. Background technique [0002] An optical collimator (hereinafter referred to as a collimator) is a device that only allows photon beams with an incident angle within a certain range to pass through. Therefore, when the collimator is used to scan the light source, the intensity of the photon beam passing through the collimator at different orientations can be recorded, and the distribution of the current intensity of the light source in the collimator at different positions and directions can be observed. . [0003] The point spread function of the collimator is a function that describes the analysis of the optical system to the point light source (hereinafter referred to as the point source). The ideal collimator only allows the photon beam to pass along its pointing direction, so the response to the poi...

AI Technical Summary

Problems solved by technology

The topological properties of the sphere make it impossible to construct a discretized mesh with the aforementioned properties on the sphere

Therefore, acceleration strategies that work on planes do not directly apply to spheres

[0023] 2. The modulation kernel function of the observation system does not necessarily have translation invariance and rotation symmetry

The disadvantage of this technology is obvious, that is, the scope of application is narrow

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