Screen image observing device and method
AssigneeMinolta Co., Ltd.
InventorsTakatoshi Ishikawa, Yasushi Kobayashi, Kenji Ishibashi, Hideki Nagata
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Abstract
A screen image observing device and method provides the sensations of virtual reality to the observer and reduces, to the extent possible, the discrepancy that is perceived by the observer between the movement of the observer's head and the displayed screen image. The device has a head tracking means, which detects the movement of the observer's head, and a screen image generating means, which generates image data based upon the result of the detection performed by the head tracking means. Image data is supplied to a display means.
Claims16
A screen image observing device comprising:
- a head tracking unit for detecting movement of a head of an observer;
- a screen image generator for generating screen image data based upon a result of said detection of said head tracking unit;
- a display for displaying said screen image data from said screen image generator;
- and
- a controller for controlling a screen image generating interval, used by said screen image generator, to adjust the screen image generating interval in response to a detection of a movement of a head by said head tracking unit.
A screen image observing method, comprising the steps of:
- detecting movement of a head of an observer;
- generating screen image data during a screen image generating interval;
- displaying said screen image data generated by said generating step;
- and
- controlling said screen image generating interval in response to the result of said detecting step.
A screen image observing device comprising:
- a head tracking unit for detecting movement of a head of an observer;
- a screen image generator for generating screen image data;
- a display for displaying said screen image data based on said screen image data generated by said screen image generator;
- and
- a controller for controlling a time period, which is required for said screen image generator to generate screen image data, in response to a result of said detection of said head tracking unit.
A screen image observing device comprising:
- a head tracking unit for detecting movement of a head of an observer;
- a screen image generator for generating screen image data based upon a result of said detection of said head tracking unit;
- a display for displaying said screen image data from said screen image generator;
- and
- a controller for controlling a screen image generating interval, used by said screen image generator, to adjust the screen image generating interval in response to a detection of a movement of a head by said head tracking unit,
- wherein said controller reduces said screen image generating interval when a following formula is satisfied:
- V θ ≥ 2 Y X
- wherein:
- Vθ=an angular speed, in degrees per second, of rotational movement of the head of the observer, calculated from the result of said detection performed by said bead tracking unit;
- Y=a frame rate in frames per second;
- and
- X=number of pixels in the image, displayed by the display, in a one-degree angle of view on a retina.
A screen image observing method, comprising the steps of:
- detecting movement of a head of an observer;
- generating screen image data during a screen image generating interval,
- displaying said screen image data generated by said generating step;
- and
- controlling said screen image generating interval in response to the result of said detecting step,
- wherein said step of controlling a screen image generating interval reduces said screen image generating interval when a following formula is satisfied:
- V θ ≥ 2 Y X
- wherein:
- Vθ=an angular speed, in degrees per second, of rotational movement of the head of the observer, calculated from the result of said detection performed by said detecting step;
- Y=a frame rate in frames per second;
- and
- X=number of pixels in the image, displayed in the display step, in a one-degree angle of view on a retina.
Dependencies are inferred from the claim text.