公开(公告)号：US11487360B1

公开(公告)日：2022-11-01

申请号：US17562652

申请日：2021-12-27

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Yu-Ying Lan ,  Jui-Feng Huang

IPC: G06F3/01 ,  G06V40/16 ,  G06V40/18

Abstract: A gaze tracking method includes the following steps. Firstly, a to-be-analyzed facial image is captured. Then, whether the to-be-analyzed facial image conforms to a customized 3D face model is determined If not, a customized 3D face model of the to-be-analyzed facial image is created. If yes, an eye area image of the to-be-analyzed facial image is obtained. Then, according to the customized 3D face model and the to-be-analyzed facial image, head posture information is obtained. Then, an eye camera coordinate value referenced to a camera coordinate system is obtained. Then, the eye camera coordinate value is converted into an eye frame coordinate value referenced to a display frame coordinate system. Then, according to the eye frame coordinate value, the head posture information and an eyeball radius, an eyeball center point coordinate value is obtained, and accordingly a gaze coordinate value is obtained.

公开(公告)号：US10481281B2

公开(公告)日：2019-11-19

申请号：US15853871

申请日：2017-12-25

Applicant: Industrial Technology Research Institute

Inventor： Jui-Feng Huang ,  Chiun-Lung Tsai ,  Chen-Shiun Chou

IPC: G01T1/24 ,  H01L27/146 ,  H04N5/32

Abstract: A radiation image detector with automatic exposure detection includes a high voltage circuit unit for providing an operation bias. An image sensing panel includes semiconductor multi-layer structure, receives the operation bias and senses an incident X-ray, and produces holes and electrons. The holes produce positive charges for forming an image. An automatic exposure detector is coupled to the high voltage circuit unit to transfer the operation bias and detects variation pattern with time of a voltage signal or a current signal induced by the electrons to determine an onset time or a cessation time for exposure. A control unit couples to the high voltage circuit unit, the image sensing panel, and the automatic exposure detector and configured to perform system control, including obtaining an image signal from the image sensing panel. An imaging unit couples to the control unit to process the image signal and display and store the image.

公开(公告)号：US20190187304A1

公开(公告)日：2019-06-20

申请号：US15853871

申请日：2017-12-25

Applicant: Industrial Technology Research Institute

Inventor： Jui-Feng Huang ,  Chiun-Lung Tsai ,  Chen-Shiun Chou

IPC: G01T1/24 ,  H01L27/146

Abstract: A radiation image detector with automatic exposure detection includes a high voltage circuit unit for providing an operation bias. An image sensing panel includes semiconductor multi-layer structure, receives the operation bias and senses an incident X-ray, and produces holes and electrons. The holes produce positive charges for forming an image. An automatic exposure detector is coupled to the high voltage circuit unit to transfer the operation bias and detects variation pattern with time of a voltage signal or a current signal induced by the electrons to determine an onset time or a cessation time for exposure. A control unit couples to the high voltage circuit unit, the image sensing panel, and the automatic exposure detector and configured to perform system control, including obtaining an image signal from the image sensing panel. An imaging unit couples to the control unit to process the image signal and display and store the image.