IMAGING APPARATUS, CONTROL METHOD THEREOF, AND PROGRAM

• US 20110310283A1
• Filed: 06/01/2011
• Published: 12/22/2011
• Est. Priority Date: 06/17/2010
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Shiozaki, Tomoyuki
• Granted Patent: US 8,654,236 B2
• Time in Patent Office: Days
• US Class Current: 348/333.06
• CPC Class Codes: H04N 23/633 for displaying additional information relating to control or operation of the camera
• CPC Class Codes: H04N 23/80 Camera processing pipelines; Components thereof

Abstract

An imaging apparatus selects and extracts a longest straight line from a captured image, and superimposes the straight line on the captured image to display it by a display device. An orientation detection unit including an acceleration sensor detects a roll angle. An X axis indicating a roll angle 0° and a Y axis indicating a roll angle 90° of the acceleration sensor are superimposed on the captured image, and an original point of the X and Y axes is matched with a center value of the extracted straight line to be displayed by the display device. A user rotates, by a predetermined operation, the image until the X and Y axes match the gradient of the extracted straight line. Thus, a system control unit corrects a roll angle output value of the orientation detection unit by an amount equal to a corrected rotational angle.

Claims

1. An imaging apparatus comprising:

an imaging unit;

an orientation detection unit configured to detect an orientation of the imaging apparatus;

a display unit configured to display an image captured by the imaging unit;

a straight line extraction unit configured to extract a straight line from the image captured by the imaging unit; and

a control unit configured to change a correction value for correcting an output of the orientation detection unit based on the straight line extracted by the straight line extraction unit.

2. The imaging apparatus according to claim 1, wherein the control unit superimposes a straight line based on the output of the orientation detection unit and the straight line extracted by the straight line extraction unit on the captured image to be displayed by the display unit, and changes the correction value.

3. The imaging apparatus according to claim 2, wherein the control unit rotates, according to an operation of an operation unit, the straight line based on the output of the orientation detection unit superimposed on the captured image.

4. The imaging apparatus according to claim 2, wherein the control unit rotates the captured image according to an operation of an operation unit.

5. The imaging apparatus according to claim 1, wherein the control unit calculates a deviation angle between a gradient output from the orientation detection unit and a gradient of the straight line extracted by the straight line extraction unit, and determines the correction value so that the deviation angle is zero.

6. The imaging apparatus according to claim 5, wherein the control unit superimposes the straight line based on the output of the orientation detection unit and the straight line extracted by the straight line extraction unit on the captured image to be displayed by the display unit, and rotates the straight line based on the output of the orientation detection unit which is superimposed on the captured image so that the deviation angle is zero.

7. The imaging apparatus according to claim 5, wherein the control unit superimposes the straight line based on the output of the orientation detection unit and the straight line extracted by the straight line extraction unit on the captured image to be displayed by the display unit, and rotates the captured image so that the deviation angle is zero.

8. The imaging apparatus according to claim 1, wherein the straight line extraction unit extracts a longest linear component from the captured image.

9. The imaging apparatus according to claim 1, wherein the control unit calculates a center of the straight line extracted by the straight line extraction unit in the captured image, and superimposes the straight line based on the output of the orientation detection unit on the captured image so that the straight line extracted by the straight line extraction unit passes through the calculated center.

10. A method for controlling an imaging apparatus that includes an imaging unit, an orientation detection unit, and a display unit, the method comprising:

capturing an image by the imaging unit;

detecting an orientation of the imaging apparatus by the orientation detection unit;

displaying the captured image by the display unit;

extracting a straight line from the captured image; and

performing control to change a correction value for correcting an output of the orientation detection unit based on the straight line extracted from the captured image.

11. A program for controlling an imaging apparatus that includes an imaging unit, an orientation detection unit, and a display unit, the program comprising:

capturing an image by the imaging unit;

detecting an orientation of the imaging apparatus by the orientation detection unit;

displaying the captured image by the display unit;

extracting a straight line from the captured image; and

performing control to change a correction value for correcting an output of the orientation detection unit based on the straight line extracted from the captured image.