Beijing Sankuai Online Technology Co., Ltd

Institute of Radiation Medicine, Academy of Military Medical Sciences, Pla.

Liping Kang

Hao Chen

Jie Zhang

Yang Zhao

Yue Gao

Baiping Ma

Chengqi Xiong

Yuwen Cong

Dawei Tan

The present application provides an image feature acquisition method and a corresponding apparatus. According to an example of the method, a classification model may be trained by using preset classes of training images, and similar image pairs may be determined based on the training images; classification results from the classification model are tested by using verification images to determine nonsimilar image pairs; and the classification model is optimized based on the similar image pairs and the nonsimilar image pairs. In this way, the optimized classification model may be used to acquire image features.

Image feature acquisition

An image retrieval method is provided. According to an example of the method, based on a first image feature of an image to be retrieved, a binary feature of the image to be retrieved may be determined, and an information entropy code of the image to be retrieved may be further determined based on the binary feature of the image to be retrieved. Then, based on the information entropy code of the image to be retrieved, images similar to the image to be retrieved may be retrieved in a preset image library.

Image retrieval

A method for preparation of Timosaponin BII, which uses Chinese traditional medicine Rhizoma Anemarrhenae or fresh rhizoma or fibrous root ofBge. as raw material, and comprises isolation of Timosaponin BII by one or more processes selected from solvent extraction, resin adsorption, polyamide chromatography, reversed phase column chromatography, Sephadex LH-20 column chromatography, etc, combining with conventional drying method such as reduced pressure drying, freeze drying, spray drying, and so on. Timosaponin BII obtained by the present method is of over 90% purity, and the method is simple, practicable and suitable for industrial production.

Process for preparation of timosaponin B II

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Beijing, China

Liping Kang