National Institute of Metrology, China

Beijing Zitiao Network Technology Co., Ltd.

National Institute of Metrology

Wenli Liu

Yu Wang

Yang Li

Fei Fei Li

Lei Yang

Rui Chen

Tang Tang

Zilong Liu

Shijia Zhao

Jianping Zhu

Baoyu Hong

Zhenya Ma

Pu Zhang

Embodiments of this disclosure provide a method, electronic device, and storage medium for capturing. The method includes: in response to a triggering operation of capturing guidance with a target posture template, displaying the target posture template over a preview image displayed in a capturing page, and displaying capturing prompt information in the capturing page, wherein the target posture template is used to guide a subject to present a corresponding capturing posture, and the capturing prompt information comprises at least one of capturing angle prompt information or capturing distance prompt information; and in response to a capturing instruction, controlling a camera to capture the subject.

Method, electronic device, and storage medium for capturing a subject based on a posture template and capturing prompt information

The present invention relates to a novel objective method for assessing high contrast resolution of images based on Rayleigh criterion and a testing operating method. The novel objective method for assessing high contrast resolution of images based on Rayleigh criterion involves combining the Rayleigh criterion with regional pixel intensity profiles for simultaneous application to high contrast resolution images of CT equipment, which allows objective assessment by using the Rayleigh criterion after the drawing of the regional pixel intensity profiles; the introduction of a normalized margin and the use of a Lanczos window function for interpolation processing on original images enable a considerably practical, time-effective and operable objective assessment method that is convenient for testers to use and also easy for CT equipment operators to use. Such a method, just like a modulation transfer function (MTF) method, is capable of tracking subtle and slow changes of the high contrast resolution of CT equipment in the life cycle thereof objectively and accurately, thus allowing improvement of the use efficiency of the CT equipment in the life cycle thereof; therefore, the method is suitable for extensive popularization and application.

Objective method for assessing high contrast resolution of image based on Rayleigh criterion and testing operating method

A high-diffusion-coefficient and high-brightness light source generation device comprising: a light source module, an optical fiber bundle and an optical fiber hemisphere emitter, wherein the light source module provides the optical fiber bundle with a plane light source having the same size as an end surface of an incident end thereof, the incident end receives light emitted from the light source module, exit ends transmit the light to the optical fiber hemisphere emitter, the exit ends of the optical fiber bundle arranged on a hemispherical wall of the optical fiber hemisphere emitter in an equal solid angle manner, an end surface of each optical fiber exit end located on the same surface as the inner wall of a hemisphere, a bottom plate arranged above an opening of the optical fiber hemisphere emitter, and an opal glass window arranged at the circle center position of the bottom plate.

High-diffusion-coefficient and high-brightness light source generation device

A cylindrical model eye comprises a plano-cylindrical portion having a plano surface and a first cylindrical surface opposite to the plano surface, a sphero-cylindrical portion having a convex spherical surface and a second cylindrical surface opposite to the convex spherical surface. The second cylindrical surface mates with the first cylindrical surface, and the first cylindrical surface has substantially the same radius curvature radius as the second cylindrical surface.

Cylindrical model eye, cylindrical test device and the manufacturing method thereof

Growing community of inventors

Beijing, China

Wenli Liu