Patents by Inventor Chiharu Sayama

Chiharu Sayama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7862172
    Abstract: A face horizontal direction measuring unit measures the angle of the face horizontal direction for a face image obtained by an imaging unit. By using information on the radius of the head and information on the shoulder position of the person obtained by the aforementioned measurement, a face vertical displacement measuring unit measures a face displacement in the vertical direction not affected by a head posture. According to the obtained displacement, the face angle in the vertical direction is decided. By using the obtained face direction, the angle of the gaze in the horizontal direction and the eyeball radius are measured. Further, a gaze vertical displacement measuring unit is provided for which measuring the pupil center position against the eyeball center position as the gaze displacement in the vertical direction. This displacement amount is used to measure the gaze angle in the vertical direction.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: January 4, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Tomoaki Yoshinaga, Shigeki Nagaya, Chiharu Sayama
  • Publication number: 20100262281
    Abstract: To obtain a high accuracy marketing analysis result, while reducing an effect of a low accuracy visual line detection processing, a storage unit of a visual line analysis apparatus stores therein, for each commodity, a basic zone including the commodity and an extended zone at least a portion of which, is overlapped with the basic zone. The basic zone and the extended zone are stored in association with each other. An attention degree calculation part of the visual line analysis apparatus compares positional information on a visual line data detected by the visual line detection part and positional information on each zone defined in a zone definition data to calculate an attention degree for each zone, aggregates attention degrees in each zone for each commodity corresponding to the each zone, calculates an attention degree data for each commodity, and stores the calculated data in the storage unit.
    Type: Application
    Filed: February 26, 2010
    Publication date: October 14, 2010
    Inventors: Yasuhiro SUZUKI, Shigeo Yuyama, Chiharu Sayama, Hideyuki Maki, Hiroshi Watanabe
  • Publication number: 20100027890
    Abstract: An eye-gaze direction calculation unit calculates the eye-gaze direction in an input facial image of a person by carrying out prescribed operation processing based on iris shape data output from an iris detection unit and face-direction measurement data output from a face-direction measurement unit. The eye-gaze direction of the facial image of the person can be measured on the basis of accurate iris shape information obtained by an iris shape detection unit. The iris and sclera regions can be estimated on the basis of the detected eyelid contour information, thereby making it possible to accurately estimate the shape of the iris.
    Type: Application
    Filed: June 10, 2009
    Publication date: February 4, 2010
    Inventors: Tomoaki YOSHINAGA, Shigeki Nagaya, Chiharu Sayama, Hideyuki Hidaka, Hiroyuki Shimokawa, Hiroshi Watanabe
  • Publication number: 20090109400
    Abstract: A face horizontal direction measuring unit measures the angle of the face horizontal direction for a face image obtained by an imaging unit. By using information on the radius of the head and information on the shoulder position of the person obtained by the aforementioned measurement, a face vertical displacement measuring unit measures a face displacement in the vertical direction not affected by a head posture. According to the obtained displacement, the face angle in the vertical direction is decided. By using the obtained face direction, the angle of the gaze in the horizontal direction and the eyeball radius are measured. Further, a gaze vertical displacement measuring unit is provided for which measuring the pupil center position against the eyeball center position as the gaze displacement in the vertical direction. This displacement amount is used to measure the gaze angle in the vertical direction.
    Type: Application
    Filed: August 25, 2008
    Publication date: April 30, 2009
    Inventors: Tomoaki Yoshinaga, Shigeki Nagaya, Chiharu Sayama