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Realistic three-dimensional grid compression method

A technology of three-dimensional grid and compression method, which is applied in the directions of image data processing, instrumentation, calculation, etc., can solve the problems that the efficiency needs to be improved, and achieve the effect of improving efficiency and improving compression efficiency

Inactive Publication Date: 2016-07-06
BEIJING UNIV OF TECH
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  • Application Information

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Problems solved by technology

However, since traditional normal image compression requires three images, the efficiency of this type of compression method for compressing normal images needs to be improved

Method used

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  • Realistic three-dimensional grid compression method
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  • Realistic three-dimensional grid compression method

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Embodiment Construction

[0017] The realistic three-dimensional mesh compression method includes an encoding stage and a decoding stage;

[0018] The original input data is the original geometric image GI, the original θ′-angle image I θ′ and the original φ-angle image I φ , the encoding phase consists of:

[0019] (1) Downsampling smooth geometric images;

[0020] (2) Predict the angle image by decoding the reconstructed geometric image;

[0021] The decoding phase includes:

[0022] (3) Decode and upsample the above geometric image to obtain the reconstructed geometric image

[0023] (4) pass Predict the θ-angle image, φ-angle image and θ′-angle image, get the predicted and

[0024] (5) Decoding residual and and added to the predicted and Get the reconstructed θ′-angle image and the reconstructed φ-angle image

[0025] (6) use The estimated side information acts on Finally get the reconstructed angle image and

[0026] Since three images are required for traditiona...

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Abstract

The invention discloses a realistic three-dimensional grid compression method, which can improve the efficiency of normal image compression so as to effectively improve the compression efficiency of a realistic three-dimensional grid. The method comprises an encoding stage and a decoding stage. Original input data are an original geometric image GI, an original theta'-angle image I theta' and an original phi-angle image I phi. The encoding stage comprises the steps of (1) down-sampling a smooth geometric image; and (2) predicting an angle image through a decoded and reconstructed geometric image. The decoding stage comprises the steps of (3) decoding and uploading the geometric image to obtain a reconstructed image GI; (4) predicting a theta-angle image, a phi-angle image and a theta'-angle image through the GI to obtain I theta, I phi and I theta'; (5) decoding residual errors delta I theta' and delta I phi, and adding the decoded residual errors to the predicted I theta' and I phi so as to obtain a reconstructed theta'-angle image I theta' and a reconstructed phi-angle image I phi; and (6) acting on the I theta' by utilizing estimated edge information of the I theta to finally obtain reconstructed angle images I theta and I phi.

Description

technical field [0001] The invention belongs to the technical field of data compression, and in particular relates to a realistic three-dimensional grid compression method. Background technique [0002] Realistic 3D mesh is a geometric mesh with normal rendering generated by 3D modeling technology, which is composed of geometric data, normal data and other attribute data of 3D model. With the rapid development of computer graphics technology, 3D grids are more and more used in scientific exploration, engineering design, simulation games and other fields. The requirements for the realism and accuracy of 3D grids are also increasing day by day in these applications. However, as an important factor for mesh realistic rendering, normal data contains too much detail information, which seriously affects the efficiency of compression. Therefore, how to efficiently compress and transmit 3D meshes with normal data has become an important and popular topic in a bandwidth-limited netw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00
CPCG06T9/00
Inventor 施云惠高原丁文鹏尹宝才
Owner BEIJING UNIV OF TECH