Reversible 3D polygonal grid data hiding algorithm based on segment displacement
A technology of grid data and polygons, applied in 3D modeling, image data processing, electrical digital data processing, etc., can solve the problem of weakened noise resistance and achieve high signal-to-noise ratio and strong application value
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[0032] The implementation of the present invention is divided into two processes of information hiding process and information extraction, wherein each process includes three main steps:
[0033] (1) Information hiding process
[0034] 1. Grid information processing
[0035] Given the triangular grid with the information to be hidden and its point normal vector, extract the NS information, and perform segmentation processing on the NS. For example, if h=13, k=3, the small segment is {0,1,2...8193}, Each large segment contains 8 small segments
[0036] large section
1—8
9—16
17—24
25—32
33—40
41—48
…
8185—8192
peak segment
4
13
18
30
35
44
…
8190
frequency
13
15
16
12
10
16
…
18
[0037] As shown in the above table, it can be known that the small segments 4, 13, 18, ..., 8190 are peak segments respectively, and the grid points in the range of these peak ...
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