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Adaptive two-stage sampling method for Metropolis light transport

A ray tracing and self-adaptive technology, applied in image data processing, 3D image processing, instruments, etc., can solve problems affecting image quality, random noise, etc., and achieve the effect of reducing noise and good adaptability

Active Publication Date: 2017-12-29
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

However, because its sampling distribution is affected by the Markov chain process based on the radiance in the scene, the darker areas in the indirect lighting scene are prone to random noise, which affects the quality of the generated image.

Method used

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  • Adaptive two-stage sampling method for Metropolis light transport
  • Adaptive two-stage sampling method for Metropolis light transport
  • Adaptive two-stage sampling method for Metropolis light transport

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Embodiment Construction

[0042] Specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0043] Such as figure 1 As shown, the Metropolis ray tracing adaptive two-stage sampling method provided by the present invention includes the following steps carried out in order:

[0044] Step 1: Parse the scene file, construct the scene model and read and set the preset parameters required in the rendering process;

[0045] The scene file is the relevant information file of the scene that needs to be rendered, including scene model information, rendering parameter information, parameter information that needs to be preset in subsequent steps, etc., and is used to provide the scene model and preset parameters for sampling in rendering; preset Parameters include: determine the initial sample process sample size, mutation probability value, multiplier value, threshold, maximum sample size, and sampling matrix.

[0046] Step 2: Sampling t...

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Abstract

The invention discloses an adaptive two-stage sampling method for Metropolis light transport, which includes the following steps: scene parameter analyzing and setting; an initial sample determining process; a first-stage sampling process; a second-stage sampling process; generating a rendering result image; and the like. The adaptive two-stage sampling method for Metropolis light transport provided by the invention can reduce the noise in the image generated, and has good adaptability to an indirect illumination scene.

Description

technical field [0001] The invention belongs to the technical field of realistic graphic rendering, and in particular relates to a Metropolis ray tracing self-adaptive two-stage sampling method. Background technique [0002] Realistic graphics rendering with different models under complex lighting conditions is the main goal of computer graphics. The rapid development of photorealistic rendering has brought the same effect as the real world to applications such as movies and games, and it also has important applications in the visual simulation of civil aviation flight simulation. The Metropolis ray tracing algorithm (MetropolisLight Transport, MLT) is efficient and robust in global illumination rendering with complex lighting scenes. However, because its sampling distribution is affected by the Markov chain process based on the radiance in the scene, the darker areas in the indirect illumination scene are prone to random noise, which affects the quality of the generated im...

Claims

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Application Information

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IPC IPC(8): G06T15/06G06T15/50
CPCG06T15/06G06T15/50
Inventor 贺怀清陈帅刘浩翰李建伏惠康华
Owner CIVIL AVIATION UNIV OF CHINA
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