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A Brightness Correction Method of Infrared Target Based on OSG

An infrared target and brightness technology, which is applied in the field of infrared scene simulation, can solve problems affecting image accuracy, inaccurate brightness values, and graphic aliasing, so as to achieve reliable image sources and avoid graphic aliasing

Active Publication Date: 2017-02-22
BEIJING INST OF ENVIRONMENTAL FEATURES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved in the present invention is: the infrared scene simulation method in the prior art is easy to cause graphics aliasing due to inaccurate brightness values, which affects the accuracy of the image

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  • A Brightness Correction Method of Infrared Target Based on OSG
  • A Brightness Correction Method of Infrared Target Based on OSG
  • A Brightness Correction Method of Infrared Target Based on OSG

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Embodiment Construction

[0026] An OSG-based infrared target brightness correction method of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] A kind of infrared target brightness correction method based on OSG of the present invention comprises the following steps:

[0028] Step 1 Backface Culling

[0029] Calculate the angle α between the normal vector of the surface element and the viewing direction. If α>90°, it is judged as the back surface, and the surface element is directly eliminated to reduce the calculation.

[0030] Step 2 Occlusion Culling

[0031] Lead three line segments from the point of view to the vertex of the triangle surface element, and use the collision detection technology. When the three line segments do not intersect with other surface elements, they are regarded as visible elements, otherwise they are eliminated.

[0032] Step 3 Vertex transformation

[0033] Calculate the projection coordinates...

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Abstract

The invention belongs to the technical field of infrared scene simulation and particularly relates to an infrared target brightness correction method based on an OSG. According to the method, the projection coordinate of a visible triangular surface element on a target is calculated, according to the brightness of visible triangular surface element on the target, the projection area of the visible triangular surface element and a screen total pixel, the weighted brightness of all surface elements in a pixel is used to calculate the brightness of the pixel. According to the method, graphics aliasing is avoided, a realistic three-dimensional infrared scene can be simulated, and a reliable source is provided for the performance evaluation of a guidance system seeker.

Description

technical field [0001] The invention belongs to the technical field of infrared scene simulation, and in particular relates to an OSG-based infrared target brightness correction method. Background technique [0002] At present, the domestic infrared scene simulation system is mainly developed based on the American VEGA visual platform. As imported commercial software, the internal modules cannot be modified and adjusted. Using the open source rendering engine OSG for infrared scene simulation development can greatly reduce the workload of developers, allowing developers to focus on the content of the simulated scene without entangled in the underlying complex 3D graphics API. Compared with VEGA vision The platform has clear advantages. [0003] However, since OSG's default ray tracing algorithm is not completely consistent with the actual infrared imaging algorithm, direct use may cause graphics aliasing and affect image accuracy. [0004] For graphics objects smaller tha...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 黄建峰范小礼王俊
Owner BEIJING INST OF ENVIRONMENTAL FEATURES