Three-dimensional model attribute image simplification method and device based on rate distortion optimization

A rate-distortion optimization and attribute image technology, applied in the field of image processing, can solve problems such as unproposed solutions

Pending Publication Date: 2022-07-12
北京云境智仿信息技术有限公司
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Problems solved by technology

[0011] Aiming at the technical problem of simplification of the 3D model attribute image in the above-mentioned prior art, no effective solution has been proposed yet

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  • Three-dimensional model attribute image simplification method and device based on rate distortion optimization
  • Three-dimensional model attribute image simplification method and device based on rate distortion optimization
  • Three-dimensional model attribute image simplification method and device based on rate distortion optimization

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Embodiment 1

[0042] According to the present embodiment, a method embodiment of a method for simplifying a three-dimensional model attribute image based on rate-distortion optimization is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be implemented in a set of computer-executable instructions such as a set of computer-executable instructions. is performed in a computer system and, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that herein.

[0043] The method embodiments provided in this embodiment may be executed in a mobile terminal, a computer terminal, a server, or a similar computing device. figure 1 A block diagram of the hardware structure of a computing device for implementing a rate-distortion optimization-based 3D model attribute image simplification method is shown. like figure 1 As shown, a computing device may include one or more p...

Embodiment 2

[0091] Figure 8 The apparatus 500 for simplifying a three-dimensional model attribute image based on rate-distortion optimization according to the first aspect of this embodiment is shown, and the apparatus 500 corresponds to the method according to the first aspect of Embodiment 1. refer to Figure 8 As shown, the apparatus 500 includes:

[0092] a rate-distortion module 510, configured to acquire a three-dimensional model attribute image, equally divide the entire attribute image into multiple image blocks, and determine the rate-distortion curve of each image block;

[0093] A downsampling rate calculation module 520, configured to optimize and solve the downsampling rate of each image block by using the Lagrangian multiplier method under a given limit of the total number of pixels according to the rate-distortion curve of each image block; and

[0094] The interpolation module 530 is configured to downsample the corresponding image block using bicubic interpolation acco...

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Abstract

The invention discloses a three-dimensional model attribute image simplification method and device based on rate distortion optimization. The method comprises the following steps: acquiring a three-dimensional model attribute image, equally dividing the whole attribute image into a plurality of image blocks, and determining a rate distortion curve of each image block; according to the rate distortion curve of each image block, under the limit of a given total number of pixels, using a Lagrange multiplier method to optimize and solve the down-sampling rate of each image block; and performing down-sampling on the corresponding image block by using bicubic interpolation according to the down-sampling rate of each image block to obtain a simplified attribute image. According to the method, the down-sampling rates of different areas of the attribute image are optimally determined, so that the simplified three-dimensional model with attributes is close to an original model as much as possible in appearance. The optimization process is not only based on the features of the 2D attribute image, but also considers the geometric features of the original and simplified 3D models and parameterization from the model surface to the attribute image. The attribute simplification method provided by the invention has universality.

Description

technical field [0001] The present application relates to the technical field of image processing, and in particular, to a method and device for simplifying a three-dimensional model attribute image based on rate-distortion optimization. Background technique [0002] Three-dimensional (3D) models are more and more widely used in computer-aided engineering (CAE), three-dimensional games, digital cities and many other fields. In addition to geometry and topology data, a 3D model often also has other attribute data. For example, related to computer simulation in CAE, there may be attribute data such as displacement, stress, temperature, and pressure; related to 3D rendering, there may be attribute data such as normal, material, and texture. In the field of computer simulation, attribute data such as displacement, stress, temperature, and pressure are often presented as color shading maps on the surface of the 3D model. This is similar to texture images used in 3D model render...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T15/00G06T15/04
CPCG06T17/00G06T15/005G06T15/04
Inventor 李维正彭京亮
Owner 北京云境智仿信息技术有限公司
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