20181025第35期博士沙龙学术报告信息

主办：电子工程系

时间：2018年10月25日（星期四）下午 2:00
地点：理6-220

报告人1：骆开庆

题目： 基于头戴式相机的室外头动追踪
Title：Outdoor head tracking using head-mounted camera

内容摘要：
 
    偏盲和半空间忽视症病人等视觉有缺陷的病人的注视点分析，使人们能够分析病人病情状况以及相关康复或者治疗手段后的效果。人的注视点是由眼动和头动共同作用的结果。自行开发一套用于室外行走行为研究的移动注视点记录系统，通过商用的眼动记录仪得到了眼动数据，如何获得准确可靠的头动信息成为需要解决的问题。本研究采用orb-slam方法对单目相机拍摄的视频进行分析，尝试从中提取出病人在实际马路上行走时头部转动三位信息。从初步的实验结果来看，能够与IMU传感器获取的数据基本吻合，但仍存在一定问题，需进一步探究。

Abstract：
    The gaze point analysis of visually impaired patients, such as hemianopia and half-space neglect, enables people to analyze the patient's condition and the effects of related rehabilitation or treatment. The gaze point of a person is the result of a combination of eye movements and head movements. A self-developed mobile gaze point recording system for outdoor walking behavior study has obtained eye movement data through a commercial eye track recorder. How to obtain accurate and reliable head movement information has become a problem to be solved. In this study, the orb-slam method was used to analyze the video taken by the monocular camera, and the three-dimensional information of the head rotation when the patient walked on the actual road was extracted. From the preliminary experimental results, it can basically match the data obtained by the IMU sensor, but there are still some problems that need to be further explored.

报告人2：熊爱民

题目： 基于智能手机的血红蛋白漫反射光谱测量光谱仪
Title：SMARTPHONE BASED OPTICAL SPECTROMETER FOR DIFFUSIVE REFLECTANCE SPECTROSCOPIC MEASUREMENT OF HEMOGLOBIN

内容摘要：

    报告设计一个微型的可见近红外G-菲涅尔光谱仪，包括完整的光谱仪系统，设计经过用于操作控制的MICROUSB端口连接检测硬件与智能手机。智能手机光谱仪能够在400 nm至1000 nm的波长范围内，实现分辨率5 nm。系统进一步研究漫反射方法，使用智能手机光谱仪的光谱系统并证明了其在血红蛋白测定组织模型的模拟实验中，平均误差为9.2%。在血红蛋白浓度测量上，与商用台式机相比，分光计智能手机G-菲涅耳光谱仪和漫反射光谱系统可以有发展机会和前景，如癌症筛查

Abstract：
    We report a miniature, visible to near infrared G-Fresnel spectrometer that contains a complete
spectrograph system, including the detection hardware and connects with a smartphone through a microUSB port for operational control. The smartphone spectrometer is able to achieve a resolution of ~5 nm in a wavelength range from 400 nm to 1000 nm. We further developed a diffuse reflectance spectroscopy system using the smartphone spectrometer and demonstrated the capability of hemoglobin measurement. Proof of concept studies of tissue phantoms yielded a mean error of 9.2% on hemoglobin concentration measurement, comparable to that obtained with a commercial benchtop spectrometer. The smartphone G-Fresnel spectrometer and the diffuse reflectance spectroscopy system can potentially enable new point-of-care opportunities, such as cancer screening.