Japanese Taxicab uses face recognition software to decide what kind of garbage to play on its seatback display

Rosa Golijan is a privacy engineer at Google. She snapped this photo of a seatback video display in a Japanese taxicab. The text says:
This taxi tablet is using a face recognition system with an image received by the tablet's front camera. The image data is used to estimate gender in order to deliver the most optimized content.
The gender estimation runs once at the beginning of the advertisement program and the image data is discarded immediately after the estimation processing. Neither the tablet nor the server records the data.