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US 8,264,554 B2Granted
Imaging apparatus and method of obtaining a roll angle of the imaging apparatus, and correcting detected roll angle
AssigneeRicoh Company, Ltd.
InventorAtsushi Matsutani
Life of this patent
Estimating the term…
Abstract
An imaging apparatus includes an image pickup device, a device that obtains an image from the image pickup device, a sensor that detects a roll angle of the sensor, wherein the sensor detects a reference roll angle of the sensor when the imaging apparatus is disposed at a predetermined roll angle, a device that calculates a reference roll angle of the image pickup device by using a reference image from the image pickup device when the imaging apparatus is disposed at the predetermined roll angle and a device that corrects a roll angle of the sensor by calculating a relative roll angle from the reference roll angle of the image pickup device and the reference roll angle of the sensor.
Claims7
An imaging apparatus, comprising:
- an image pickup device;
- a device that obtains an image from the image pickup device;
- an acceleration sensor that detects a roll angle of the acceleration sensor, wherein the acceleration sensor detects a reference roll angle when the imaging apparatus is disposed at a horizontal position, a longitudinal photographing of +90 degrees, and a longitudinal photographing of −90 degrees, respectively;
- a device that calculates a reference roll angle of the image pickup device by using a reference image from the image pickup device when the imaging apparatus is disposed at the horizontal position, the longitudinal photographing of +90 degrees, and the longitudinal photographing of −90 degrees, respectively;
- a device that calculates a first difference as a first relative roll angle between the reference roll angle of the image pickup device when the imaging apparatus is disposed at the horizontal position and the reference roll angle of the sensor when the imaging apparatus is disposed at the horizontal position, a second difference as a second relative roll angle between the reference roll angle of the image pickup device when the imaging apparatus is disposed at the longitudinal photographing of +90 degrees and the reference roll angle of the sensor when the imaging apparatus is disposed at the longitudinal photographing of +90 degrees, and a third difference as a third relative roll angle between the reference roll angle of the image pickup device when the imaging apparatus is disposed at the longitudinal photographing of −90 degrees and the reference roll angle of the sensor when the imaging apparatus is disposed at the longitudinal photographing of −90 degrees;
- and
- a device that corrects the detected roll angle of the acceleration sensor by using one of the first, second and third relative roll angles.
4 more elements
A method of obtaining a roll angle of an imaging apparatus, comprising:
- providing the imaging apparatus with an image pickup device;
- a device that obtains an image from the image pickup device;
- an acceleration sensor that detects a roll angle of the acceleration sensor, wherein the acceleration sensor detects a reference roll angle when the imaging apparatus is disposed at a horizontal position, a longitudinal photographing of +90 degrees, and a longitudinal photographing of −90 degrees, respectively;
- a device that calculates a reference roll angle of the image pickup device by using a reference image from the image pickup device when the imaging apparatus is disposed at the horizontal position, the longitudinal photographing of +90 degrees, and the longitudinal photographing of −90 degrees, respectively;
- a device that calculates a first difference as a first relative roll angle between the reference roll angle of the image pickup device when the imaging apparatus is disposed at the horizontal position and the reference roll angle of the sensor when the imaging apparatus is disposed at the horizontal position, a second difference as a second relative roll angle between the reference roll angle of the image pickup device when the imaging apparatus is disposed at the longitudinal photographing of +90 degrees and the reference roll angle of the sensor when the imaging apparatus is disposed at the longitudinal photographing of +90 degrees, and a third difference as a third relative roll angle between the reference roll angle of the image pickup device when the imaging apparatus is disposed at the longitudinal photographing of −90 degrees and the reference roll angle of the sensor when the imaging apparatus is disposed at the longitudinal photographing of −90 degrees;
- and a device that corrects the detected roll angle of the acceleration sensor by using one of the first, second and third relative roll angles;
- obtaining an image from the image pickup device;
- detecting a roll angle of the sensor;
- calculating the reference roll angles of the image pickup device;
- and
- correcting the roll angle of the sensor.
8 more elements
Dependencies are inferred from the claim text.