Lee Jong Man, Lee Hyeon Chang, Gwon Su Yeong, Jung Dongwook, Pan Weiyuan, Cho Chul Woo, Park Kang Ryoung, Kim Hyun-Cheol, Cha Jihun
Division of Electronics and Electrical Engineering, Dongguk University, 26 Pil-dong 3-ga, Jung-gu, Seoul 100-715, Korea.
Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 305-700, Korea.
Sensors (Basel). 2015 Mar 11;15(3):5935-81. doi: 10.3390/s150305935.
Gaze tracking systems usually utilize near-infrared (NIR) lights and NIR cameras, and the performance of such systems is mainly affected by external light sources that include NIR components. This is ascribed to the production of additional (imposter) corneal specular reflection (SR) caused by the external light, which makes it difficult to discriminate between the correct SR as caused by the NIR illuminator of the gaze tracking system and the imposter SR. To overcome this problem, a new method is proposed for determining the correct SR in the presence of external light based on the relationship between the corneal SR and the pupil movable area with the relative position of the pupil and the corneal SR. The experimental results showed that the proposed method makes the gaze tracking system robust to the existence of external light.
凝视跟踪系统通常使用近红外(NIR)灯和NIR相机,此类系统的性能主要受包括NIR成分在内的外部光源影响。这归因于外部光产生的额外(虚假)角膜镜面反射(SR),这使得难以区分由凝视跟踪系统的NIR照明器引起的正确SR和虚假SR。为克服此问题,提出了一种新方法,用于基于角膜SR与瞳孔可移动区域之间的关系以及瞳孔与角膜SR的相对位置,在存在外部光的情况下确定正确的SR。实验结果表明,所提出的方法使凝视跟踪系统对外部光的存在具有鲁棒性。