Underwater light field sampling and simulating method

A simulation method and light field technology, applied in the field of virtual reality, can solve the problem of low realism of lighting simulation

Inactive Publication Date: 2011-03-02
BEIHANG UNIV
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Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of sampling and simulating the underwater light field, overcome the problem of low realism of lighting simulation in the existing simulation system, use real sampling data to establish an underwater lighting model, and simulate the underwater environment for the field of visual special effects Provide an effective scene rendering method, and also provide a visualization solution for agricultural research on the influence of underwater light field on aquatic plants

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  • Underwater light field sampling and simulating method

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] Step 1 as figure 1 As shown in , the design drawing of the underwater panoramic lighting sampling device is given, and the device composition is as follows:

[0034] (1) for a 0.5*0.5*0.3m 3 The steel cube frame of , which is the main structure of the light sampling device.

[0035] (2) It is a pressure type depth measuring device, which is used for the underwater depth where the timing sampling device is located.

[0036] (3) is a fish-eye camera, which is used to regularly sample the underwater light conditions. Two fish-eye cameras placed on the back are installed in the device, which can sample the distribution of the entire underwater light.

[0037] (4) is a gravity sensor level measuring instrument, which is used to record the deflection angle between the device and the horizontal direction.

[0038] Step 2 as figure 2 As shown, the ...

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Abstract

The invention relates to an underwater light field sampling and simulating method which designs an underwater light field sampling device and realizes the simulation of an underwater light field based on sampled data. The method comprises the following steps: (1) designing an underwater panoramic illumination sampling device; (2) enabling the sampling device designed in step (1) to descend from the water surface to a set depth at a constant speed, and simultaneously acquiring a group of equally-spaced underwater sampled data changing with the depth; (3) after sampling underwater illumination images in step (2), respectively carrying out a noise smoothing treatment on each group of illumination images, and splicing the illumination images sampled by two fisheye cameras at the same depth into a whole panoramic illumination image; and (4) after obtaining a group of panoramic illumination images at different depths in step (3), calculating the panoramic illumination image at the depth in which a scene stays, adding scene model data, and carrying out underwater illumination rendering by a ray tracing algorithm. Based on the characteristics of high attenuation degree of visible light in the underwater environment and complex interference in water, according to the method in the invention, the underwater illumination model is established; and the method has the advantages of strong sense of reality and easy implementation.

Description

technical field [0001] The invention relates to an underwater light field sampling device, and proposes a simulation method for realizing an underwater light field by using sampling data, belonging to the technical field of virtual reality. Background technique [0002] Research on underwater lighting is mainly concentrated in the field of agriculture. Because aquatic animals and plants are particularly affected by the light in the water, especially for animals and plants living at a specific depth, the change of living light conditions will have a great impact on the entire underwater biological chain. Therefore, the underwater environment lighting modeling based on real data has very important practical significance. [0003] There are two main differences between the underwater light field and the terrestrial light field: (1) The attenuation of underwater light is large; (2) Due to the presence of various pollutants in the water, the scattering of light is very serious. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/00
Inventor 赵沁平王霖伍朝辉周忠吴威
Owner BEIHANG UNIV
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