Mesh Displacement Decoding Using Normal-Direction-Only Compression
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Solution Overview
Problem
Existing mesh decoding technologies inefficiently compress displacement due to encoding components in directions orthogonal to the normal direction, despite these components having minimal impact on objective performance.
Innovation Solution
A mesh decoding device and method that encodes only the component in the normal direction of the displacement, utilizing a displacement decoding unit with components for determining encoding dimension, video decoding, inverse quantization, and inverse wavelet transform to efficiently compress the displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If components in directions orthogonal to the normal direction are encoded, then the displacement can be represented more completely, but the compression efficiency deteriorates
Solution Approach 1:
The patent extracts and encodes only the essential component of the displacement vector, which is the component in the normal direction. By taking out and encoding only this critical component while ignoring the orthogonal components, the patent achieves efficient compression without significantly compromising the displacement representation accuracy, since the normal direction component contains the most important geometric information for mesh reconstruction
Data Source
AI summary
A displacement decoding unit (205) of a mesh decoding device (200) according to the present invention includes: a displacement encoding dimension number determination unit (205A) configured to determine a displacement encoding dimension number and output a displacement encoding method; a video decoding unit (205B) configured to decode the displacement bit stream by a video codec and output the displacement video frame; a displacement reconstruction unit (205C) configured to extract and output a quantization displacement coefficient from the displacement video frame; an inverse quantization unit (205D) configured to perform inverse quantization on the quantization displacement coefficient and output a displacement coefficient having been calculated, and an inverse wavelet transform unit (205E) configured to perform inverse wavelet transform on the displacement coefficient and output the decoded displacement having been calculated.