Coordinate-wise monotonic transformations enable privacy-preserving age estimation with 3D face point cloud

Four elementary monotonic functions (exponential, logarithmic, square, and sine) were applied immediately after Coordinate-Wise Rank Transformation (CRT) and normalized to [-1, 1] in a coordinate-wise manner. The three circles on the radar plot correspond to the first-order Model Indistinguishability, the second-order Model Indistinguishability and the Mean Absolute Error of the exp(CRT) model (the largest among the four), from the inside out. All models could accurately and consistently estimate ages. Credit: Science China Press

In a recent publication in Science China Life Sciences, a research team led by Professor Jing-Dong Jackie Han and Ph.D. student Xinyu Yang from Peking University …

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