Alibaba Group Holding Limited

Alipay Labs (Singapore) Pte. Ltd.

Zhejiang Dahua Technology Co., Ltd.

Zhejiang Sci-Tech University

Advanced New Technologies Co., Ltd.

Yan Xu

Mian Huang

Jiangbo Huang

Li Yang

Jianhua Xiang

Wenkai Zhou

Wenzhen Yang

Xinli Wu

Lili Chen

Panfei Zhu

The present invention discloses a layered electro-magnetic refreshable braille display device and braille reader. The layered electro-magnetic refreshable braille display device includes three layers of braille display modules and a touch panel. Each braille display module includes 5 plates and a plurality of tactile pin driving mechanisms for driving the 'up' and 'down' of the braille dots. One or more lines of braille cells are arranged on the touch panel. Each line of braille cells displays a plurality of braille characters. A microprocessor is connected to a braille translation module, a voice playing module and an interaction controller respectively, wherein the interaction controller is connected to the braille display device, to form the braille reader. This device can display one or more lines of braille characters by relying on the electro-magnetic principle. It boasts real-time refreshing of the braille, synchronization of braille display and voice playing.

Layered electro-magnetic refreshable braille display device and braille reader

Disclosed are computer-implemented methods, non-transitory computer-readable media, and systems for face anti-spoofing. One computer-implemented method includes receiving, by a server and from a user device, a plurality of images of a user face, each of the plurality of images corresponding to a facial expression performed by a user in response to each interaction challenge of a plurality of interaction challenges. The plurality of images are concatenated into a concatenated image. A convolutional neural network (CNN) classifier is used to obtain a confidence score for the concatenated image. A liveness of the user face is determined based on a comparison of the confidence score and a threshold value.

Methods and devices for face anti-spoofing

Disclosed are computer-implemented methods, non-transitory computer-readable media, and systems for authentication. One computer-implemented method includes obtaining a first image, where the first image is an image of an identification (ID) document captured when the ID document is tilted at a first angle relative to a projected light source. A second image is obtained, where the second image is an image of the ID document captured when the ID document is tilted at a second angle relative to the projected light source. The ID document is authenticated based on identification of a first illuminated region and a second illuminated region, where the first illuminated region is associated with the first image and the second illuminated region is associated with the second image, and a comparison between a first position of the first illuminated region and a second position of the second illuminated region.

Authentication method and system

Disclosed are computer-implemented methods, non-transitory computer-readable media, and systems for image processing. One computer-implemented method includes determining a rotated angle of an identification (ID) document image, where the rotated angle corresponds to an angle between a bottom edge of the ID document image and an x-axis. The ID document image is rotated based on the rotated angle, where an angle is defined between the bottom edge of the rotated ID document image and the x-axis, and where a value of the angle is within a predefined range. Image regression is performed on the rotated ID document image to obtain coordinates of four corner points of the rotated ID document image. Image alignment is performed on the rotated ID document image based on the coordinates of four corner points of the rotated ID document image.

Image processing method and system

A method for generating a video synopsis may include: segmenting a video file into a plurality of video fragments. The method may also include extracting moving object information from the video fragment based on a distributed computing method and determining a plurality of index files based on the moving object information. The method may further include combining the plurality of index files and generating a video synopsis based on the moving object information and the combined index file.

Methods and systems for video synopsis

An identity authentication method is provided. The method comprises receiving request information transmitted by an online terminal device for determining neighbor network devices and determining at least one neighbor network device of the online terminal device according to the request information, identifying at least one credible neighbor network device of the online terminal device from the at least one neighbor network device and identifying at least one weighted neighbor network device of the online terminal device from the at least one neighbor network device, and computing a credibility score of the online terminal device according to a number of the credible neighbor network device and a number of the weighted neighbor network device, generating authentication notification information according to the credibility score, the authentication notification information indicating whether the online terminal device passes identity authentication, and transmitting the authentication notification information to the online terminal device.

Methods, apparatus, and systems for identity authentication

A data communication method includes: receiving a plugin execution instruction transmitted by a server according to a first channel, the plugin execution instruction being used to instruct to operate a target plugin; according to the plugin execution instruction, calling the target plugin to operate, and feeding back operation result data to the server via the first channel for processing, such that the server feeds back a processing result to a browser. The present disclosure realizes the compatibility of plugins with various browsers.

Growing community of inventors

Hangzhou, China

Yan Xu