Ms. Yaoyao Hu Profile

Yaoyao Hu

at Beijing Institute of Technology

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Publications (3)

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Proceedings Article | 12 March 2021 Paper

Spectral imaging microscopic system with long working distance for burn diagnosis

Yvtong Guo, Jun Chang, Yaoyao Hu, Sitong Liu, Yi Huang

Proceedings Volume 11763, 117633A (2021) https://doi.org/10.1117/12.2586527

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In order to meet the needs of modern digital medical treatment for the quantification and precision of the diagnosis of burning wound, a spectral imaging microscope with long working distance which combined with hyperspectral imaging technology and microscopic imaging technology was designed. As a non-invasive diagnostic method, spectral detection has gained more in-depth applications in clinical medicine and biometric identification. On the basis of acquiring traditional two-dimensional planar images, the spectral microscopy imaging system further obtains the spectral information of the burned area, so as to perform quantitative analysis and diagnosis of the range, depth, and type of the wound. The system uses the principle of push broom to scan the burned site, and the Offner spectral imaging system is connected to the imaging microscope objective lens. It has a long working distance of 30mm, a spectral resolution of 5nm and good imaging quality. It has a compact, lightweight and miniaturized structure. It is of great significance for the application of spectral imaging technology in clinical medicine.

Proceedings Article | 12 March 2021 Paper

Optical design of a snapshot hyperspectral imaging spectrometer for facial colour diagnosis in traditional Chinese medicine

Xuehui Zhao, Jun Chang, Yaoyao Hu, Shan Du, Dongmei Li

Proceedings Volume 11763, 1176334 (2021) https://doi.org/10.1117/12.2586485

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Colour diagnosis of traditional Chinese medicine (TCM) is the main content of “looking” inspection in the four-diagnosis methods of "looking, listening, asking and feeling the pulse". The action of light on the face is a very complex process, it is difficult to distinguish reflected light from internally reflected light by human eyes alone. In this paper, we discuss the relationship between TCM facial colour diagnosis and optics, integrate imaging spectroscopy to improve the objectified development of facial colour diagnosis in TCM. A visible band snapshot hyperspectral imaging spectrometer is designed based on a grating dispersion module. This imaging spectrometer is a snapshot system with 34° field of view and a measured spectrum from 400 nm to 680 nm. The spectral resolution reaches 3nm. The total length of the optical system is only 165mm, which can realize the miniaturization of products.

Proceedings Article | 12 March 2021 Paper

Design of compression-sensing projection measurement optical system based on digital micromirror device for spectral imaging

Yaoyao Hu, Jun Chang, Xuehui Zhao, Yue Zhong

Proceedings Volume 11763, 117632U (2021) https://doi.org/10.1117/12.2586420

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With the improvements of the spatial and spectral resolution, Compressive Sensing (CS) is applied to spectral imaging. CS-based spectral imaging reduces the requirements for data acquisition, storage and processing capabilities, while reducing the pressure of subsequent data transmission and storage. At present, the research on CS system is mostly in the stage of simulation, mainly focusing on the image algorithm. We studied the CS projection measurement optical system using Digital Micromirror Devices (DMD) as the image compression devices. We proposed a new dual-channel optical system that acquired the low-resolution coded image by DMD at both the reflection direction of +12°and -12°. We use shelf lenses to design a DMD-based dual-channel optical system and perform tolerance analysis on the optical system. The system has good tolerances, which reduces the cost of the system. Then, the dual optical path optical system was simulated and the principle prototype was built. Both obtain low-resolution coded images of two channels, which are complementary in energy. And the amount of image data is low, which are used to restore high-resolution images. This construction method can not only restore the encoded image of one channel to obtain a high-resolution spectral image, but also fuse the restored images of two channels to obtain a higher-resolution spectral image. Therefore, this construction method can be applied to spectral imaging technology.

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