US 7,095,424 B2Granted

Image display apparatus and method, and storage medium

AssigneeCanon Kabushiki Kaisha

InventorsKiyohide Satoh, Mahoro Anabuki

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Abstract

An image display apparatus calculating correction information to correct measured values of an orientation sensor includes an orientation sensor that senses orientation of a viewpoint and outputs measured values, a correction unit for correcting the measured values by using correction information, and a generation unit for generating a virtual image based on the corrected measured values. A display unit displays the generated virtual image, and a calculation unit calculates the corrected information. The calculation unit obtains the measured values of the sensor at the point of when the virtual image is displayed at an appropriate position, generates the correction information from the measured values and predetermined orientation information, and generates the virtual image based on orientation information relating to the viewpoint obtained using the measured values of the orientation sensor and the correction information.

Claims8

Dependent claims

An image display apparatus for calculating correction information to correct measured values of an orientation sensor, said apparatus comprising:

an orientation sensor that senses orientation of a viewpoint and outputs measured values of the orientation;
a correction unit that corrects the measured values by using correction information;
a generation unit that generates a virtual image based on the corrected measured values;
a display unit that displays the generated virtual image;
and
a calculation unit that calculates the correction information,
wherein said calculation unit
obtains the measured values of said sensor at the point of when the virtual image, which is generated based on predetermined orientation information, is displayed in an appropriate position,
generates the correction information from the measured values and the predetermined orientation information,
obtains a user's instruction to modify the correction information, according to the displayed virtual image which is generated based on the measured values of the orientation sensor and the correction information, and
modifies the generated correction information in response to the user's instruction,
wherein said calculation unit modifies the generated correction information to maintain a relationship between a first angle of rotation and a second angle of rotation according to the generated correction information,
with the first angle relating to an azimuth at an orientation of said sensor in a vision coordinate system, and the second angle relating to an azimuth at an orientation of a sensor coordinate system in a world coordinate system and wherein,
said display unit displays the image with the modified generated correction information.

11 more elements

An information processing method for generating correction information for correcting a measured value of an orientation sensor, wherein the measured value is used for generating a virtual image in response to a view orientation of a user, said method comprising the steps of:

inputting the user's instruction to indicate that a virtual image, which is generated based on predetermined orientation information, is displayed in an appropriate position;
obtaining measured values based on the user's instruction;
generating the correction information from the measured values and the predetermined orientation;
obtaining a user's instruction to modify the correction information, according to the displayed virtual image which is generated based on the measured values of the orientation sensor and the correction information,
modifying the generated correction information in response to the user's instruction, and
modifying the generated correction information to maintain a relationship between a first angle of rotation and a second angle of rotation according to the generated correction information,
with the first angle relating to an azimuth at an orientation of the sensor in a vision coordinate system, and the second angle relating to an azimuth at an orientation of a sensor coordinate system in a world coordinate system, and
displaying the image with the modified generated correction information.

5 more elements

Dependencies are inferred from the claim text.