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US 8,508,804 B2Granted
Movement detection apparatus and recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorTaichi Watanabe
Life of this patent
Estimating the term…
Abstract
When at least one of first image data and second image data is captured, according to a moving speed of an object while an image sensor is capturing an image, exposure time for capturing the image is controlled to decrease a difference between object blur widths in a direction in which the object moves.
Claims16
An apparatus comprising:
- a conveyance mechanism having a rotating member configured to move an object;
- an encoder configure to detect a rotation state of the rotating member;
- a sensor configured to capture an image of a surface of the object to acquire first data and second data;
- a processing unit configured to acquire a movement state of the object by clipping a template pattern from the first data and seeking a region having a high correlation with the template pattern in the second data;
- and
- a control unit configured to control the sensor to decrease a difference between an object blur width in a direction in which the object moves in the first data and the object blur width in the second data,
- wherein the control unit controls timings for starting and stopping capturing images when the sensor captures the first data and the second data, based on detection by the encoder.
4 more elements
An apparatus comprising:
- a conveyance mechanism including a driving roller configured to move an object;
- an encoder configured to detect a rotation state of the driving roller;
- a sensor configured to capture an image of a surface of the object to acquire first data and second data;
- a processing unit configured to acquire a movement state of the object by clipping a template pattern from the first data and seeking a region having a high correlation with the template pattern in the second data;
- and
- a control unit configured to control an exposure time for capturing the image of the sensor to decrease a difference between an object blur width in a direction in which the object moves in the first data and the object blur width in the second data,
- wherein, based on the rotation state and the moving state, the control unit controls driving of the driving roller.
4 more elements
A control method comprising:
- causing a conveyance mechanism to move an object;
- causing an encoder to detect a moving state of the conveyance mechanism;
- causing a sensor to capture an image of a surface of a moving object to acquire first data and second data;
- acquiring a movement state of the object by clipping a template pattern from the first data and seeking a region having a high correlation with the template pattern in the second data;
- and
- controlling the sensor to decrease a difference between an object blur width in a direction in which the object moves in the first data and the object blur width in the second data, controlling timings for starting and stopping capturing images when the sensor captures the first data and the second data based on detection by the encoder.
3 more elements
Dependencies are inferred from the claim text.