Peking University

University of Electronic Science and Technology of China

Founder Apabi Technology Limited

Boe Technology Group Co., Ltd.

Mao Ye

Lifeng Jin

Zhi Tang

Jianbo Xu

Wei Wan

Xiaoxi Chen

Zhidong Wang

Junrui Zhang

Lijia Zhou

Xuehui Zhu

Yuanlong Wang

Shuang Du

Ce Zhu

Pengwei Li

Hongwei Guo

Guangyong Li

Yalei Zhang

Yuyang Liu

Provided are a polarization imaging apparatus, a polarization imaging method, a controller and a computer readable storage medium. The polarization imaging apparatus includes an optical rotation device, a lens device, an image sensor, an image processor, and a controller which are sequentially arranged along a ray direction of incident light. The controller is configured to control the optical rotation device to be in a first optical rotation state or a second optical rotation state, control the lens device to be in an in-focus state or an out-of-focus state, and control the image sensor to collect light passing through the optical rotation device and the lens device to obtain multiple images. The image processor is configured to obtain polarized image information according to the multiple images.

Polarization imaging apparatus, polarization imaging method, controller and storage medium

An imaging device, an imaging control method, an electronic apparatus, and a readable medium. The imaging device comprises: an image sensing assembly; a liquid crystal lens assembly provided with light control components corresponding to an image sensing component, wherein each of the light control components comprises a first liquid crystal component and a second liquid crystal component, which are arranged opposite each other, and the orientation of liquid crystal molecules in the first liquid crystal component is perpendicular to the orientation of liquid crystal molecules in the second liquid crystal component; and a processing assembly, wherein the processing assembly is respectively electrically connected to the image sensing assembly and the liquid crystal lens assembly, and is configured to adjust, according to a light receiving amount measured by the image sensing assembly, the voltage applied to the light control component.

Imaging device, control method for imaging device, electronic apparatus and non-transitory readable medium comprising first and second voltage signals applied to a liquid crystal lens assembly to adjust the focal position of a first and second linearly polarized light

A method for optimizing a second coding is provided. The method includes: Setting a quantization parameter of a start frame of a video sequence according to a range of an input quantization parameter QPof a coder; performing first coding with a simplified method, and calculating a frame-level temporal impact factor kof a current frame and a block-level temporal impact factor kof all 16&#xd7;16 pixel blocks in the current frame; restoring reference list information of the coder after the first coding is completed, and then determining whether a scene is switched; and performing the second coding by setting quantization parameters with different strategies according to whether the scene is switched.

Method for optimizing two-pass coding

An optical device includes a first electrode layer, a first alignment layer, a liquid crystal layer, a second alignment layer, and a second electrode layer being arranged in turn along a light transmission direction; wherein the first electrode layer comprises a first electrode, a second electrode, and a first impedance membrane arranged between the first electrode and the second electrode, and the first electrode and the second electrode are respectively arranged on opposite ends of the first impedance membrane; the second electrode layer has a structure similar to that of the first electrode layer. The four electrodes form a light transmission hole being shaped as a parallelogram. The present invention solves the problem that the focal length of the liquid crystal lens cannot be accurately adjusted due to the instability of the impedance of the impedance membrane of the present liquid crystal lens.

Optical device, imaging device, focus driving method, and method for moving lens center

A method and system for selecting an encoding format used for reading a target document are provided. The method comprises reading a reference document with at least one reference encoding format and determining all or some disorder code patterns obtained when reading the reference document with the reference encoding format; reading the target document with one encoding format each time; for each encoding format, comparing data generated when reading the target document with this encoding format and the determined disorder code patterns to determine disorder codes generated when reading the target document with this encoding format; counting disorder codes generated when reading the target document with each encoding format, and making a comparison to determine the encoding format used for reading the target document.

Method and system for selecting encoding format for reading target document

A method and system for key knowledge point recommendation are provided, the method comprising calculating knowledge point relationship strengths of knowledge points in a set of knowledge points; calculating weights for knowledge points according to the knowledge point relationship strengths of knowledge points in the set of knowledge points, and storing the knowledge points and weights correspondingly; determining key knowledge points according to the weights of the knowledge points and recommending the key knowledge points to a user. With this solution, knowledge point relationship strengths are obtained through calculating knowledge point relationship strengths of knowledge points in a set of knowledge points; and recommendation is given to the user for learning knowledge according to knowledge point relationship strengths, so as to help the user to learn key knowledge points selectively in a more objective and effective manner, and avoid problems of information recommendation based on fuzzy logical information recommendation technology.

Method and system for key knowledge point recommendation

The present invention provides a semantic information acquisition method and system, and corresponding keyword expansion and search methods and systems, comprising: searching for, then classifying an article; then, performing word segmentation according to the classified article to obtain the words in said category, and setting said category and words to serve as the semantic information of the keyword; also, a method and system using the semantic information acquisition method to expand a keyword, and a method and system using keyword expansion to perform a search. The described semantic information acquisition method effectively avoids the technical problems in the prior art of only being able to obtain semantic information of English vocabulary; and it also being impossible to classify semantic information based on category information. The invention is particularly suitable for searching using a keyword, searching a large number of texts, and organizing large amounts of related data and information.

Method and system of acquiring semantic information, keyword expansion and keyword search thereof

A method and system for obtaining a knowledge point implicit relationship are provided; first, establishing a knowledge point explicit relationship map according to knowledge point explicit relationship strengths; second, computing according to said knowledge point explicit relationship map a simple path set of two knowledge points; then, computing the implicit relationship strength values corresponding to each simple path in said simple path set; further, comparing the relationship strength values of the simple paths and setting as the significant implicit relationship strength value the simple path relationship strength having the largest value also greater than a preset threshold value. The described solution effectively avoids the problems of only using the relationship strengths between knowledge points and the ratio of relationship strengths to obtain the implicit relationship of knowledge points, the manner of searching for an implicit relationship being insufficiently accurate, and not performing normalization processing on the relationship strengths.

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Beijing, China

Mao Ye