Visible 3D-model Watermarking Algorithm for 3D-Printing Based on Bitmap Fonts

Changchun Yan ； Guoyou Zhang ； Anhong Wang ； Li Liu ； Chin-Chen Chang

《International Journal of Network Security》 23卷1期 (2021/01) Pp. 172-179

https://doi.org/10.6633/IJNS.202101_23(1).19

摘要

The copyright protection of 3D model data is becoming more and more important with the development of the open Internet and 3D-priting. We propose a visible 3D-model watermarking algorithm for 3D-printing based on bitmap fonts to overcome the shortcoming that the current 3D model watermarking is visible only on a computer. First, bitmap fonts were used as input watermarking information. Then, the smooth region of the 3D model is subdivided selectively and projected onto a 2D plane based on the bitmap font. Next, the watermarking information is embedded into the 2D plane, and the corresponding region is projected onto the original meshes. Then, the watermark is embedded with a certain intensity so that it is still visible after the 3D-printing of the model. The results of experiments showed that the watermarking information including Chinese characters, English letters, and numbers is visible on the printed entities and that it is robust to common attacks.

關鍵字

Bitmap Font ； Three-Dimensional Model ； 3D-Printing ； Visible Watermark