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High-precision GRECO method based on view division

A high-precision, view-based technology, applied in image analysis, image data processing, graphics and image conversion, etc., can solve the problems of calculation result error, large size, pixel and target error, etc., to achieve improved accuracy and improved detail information. Effect

Inactive Publication Date: 2019-09-10
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, this method actually uses the pixels on the computer screen as facets for calculation, which is limited by the pixels of the computer screen. When the actual size of the target is large, the size represented by each pixel will be very large, and the pixel is different from the real surface of the target. The error will become larger, so the calculation result will have a certain error

Method used

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  • High-precision GRECO method based on view division
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  • High-precision GRECO method based on view division

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] The present invention provides a high-precision GRECO method based on view division, which divides the target view displayed on the current screen into multiple parts, enlarges the view of each part, and calculates the scattering field and RCS of each part respectively; Rotate the target view multiple times to obtain the RCS of each view after rotation; linearly superimpose all RCS to obtain the overall RCS of the target. figure 1 It is the flow chart of the present invention.

[0022] Include the following steps:

[0023] Step 1: Completely display the 3D geometric model of the target to be calculated in the current view of the computer screen;

[0024] Step 2: Divide the current view on the computer screen into n parts both horizontally and vertically, then the current view is divided into n*n sub-views, n>0;

[0025] Step 3: Enlarge the fir...

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Abstract

The invention provides a method for improving calculation precision for an RCS graphic algorithm, and the method comprises the steps: firstly, dividing a target view displayed on a current screen intoa plurality of parts, amplifying the view of each part, and respectively calculating a scattering field and an RCS of each part; rotating the target view for multiple times, and obtaining the RCS ofeach rotated view; and linearly superposing all the RCSs to obtain the overall RCS of the target. According to the method, the detail information of the target three-dimensional geometric model is improved, the precision of the graphic algorithm can be greatly improved, and the method is not limited by computer screen hardware any more.

Description

technical field [0001] The invention relates to the field of electromagnetic scattering, in particular to a method for improving the calculation accuracy of graphic electromagnetic scattering. Background technique [0002] Graphical Electromagnetic Computing (GRECO, referred to as RCS Graphical Algorithm) is a new type of algorithm developed in the early 1990s. It is a method that combines computer graphics and high-frequency RCS calculations. This method is mainly aimed at the single-station RCS calculation of electrically large and complex targets at high frequencies, and has the advantages of small storage capacity, high calculation accuracy, fast calculation speed, and good real-time performance. However, this method actually uses the pixels on the computer screen as facets for calculation, which is limited by the pixels of the computer screen. When the actual size of the target is large, the size represented by each pixel will be very large, and the pixel is different f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/50G06T7/90G06T17/00G06T3/60
CPCG06T3/60G06T17/00G06T7/50G06T7/90
Inventor 范超群韦高李建周李双
Owner NORTHWESTERN POLYTECHNICAL UNIV
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