Image-blur correction apparatus, tilt correction apparatus, method of controlling image-blur correction apparatus, and method of controlling tilt correction apparatus

• US 9,912,868 B2
• Filed: 09/13/2016
• Issued: 03/06/2018
• Est. Priority Date: 09/15/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Wakamatsu, Nobushige
• Primary Examiner(s): OSINSKI, MICHAEL S
• Application Number:
  US15/264,072
• Publication Number:
  US 20170078577A1
• Time in Patent Office: 539 Days
• CPC Class Codes: G03B 2217/005 Blur detection
• CPC Class Codes: H04N 23/62 Control of parameters via user interfaces
• CPC Class Codes: H04N 23/6812 based on additional sensors, e.g. acceleration sensors
• CPC Class Codes: H04N 23/683 performed by a processor, e.g. controlling the readout of an image memory
• CPC Class Codes: H04N 23/6842 by controlling the scanning position, e.g. windowing
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

A tilt correction apparatus includes a manipulation unit configured to designate a level of an effect of first tilt correction of an imaging apparatus having an optical axis as a rotary axis and a level of an effect of second tilt correction of the imaging apparatus having an axis orthogonal to the optical axis as a rotary axis, an electronic correction unit configured to execute at least one of the first tilt correction and the second tilt correction by moving an image clipping range set within an imaging screen, and a calculation unit configured to vary a ratio of a first tilt-correctable range and a ratio of a second tilt-correctable range from the electronic correction unit according to the level of the effect of the first tilt correction and the level of the effect of the second tilt correction.

Claims

1. A tilt correction apparatus comprising:

a designation unit configured to designate a level of an effect of first tilt correction of an imaging apparatus having an optical axis as a rotary axis and a level of an effect of second tilt correction of the imaging apparatus having an axis orthogonal to the optical axis as a rotary axis;

an electronic correction unit configured to execute at least one of the first tilt correction and the second tilt correction by moving an image clipping range set within an imaging screen; and

a control unit configured to vary a ratio of a first tilt-correctable range and a ratio of a second tilt-correctable range in an electronic correction according to the level of the effect of the first tilt correction and the level of the effect of the second tilt correction,

wherein each unit is implemented by one or more processors, circuitry, or a combination thereof.

2. The tilt correction apparatus according to claim 1,

wherein the first tilt-correctable range is a roll-correctable range, and

wherein the second tilt-correctable range is a translation-correctable range.

3. The tilt correction apparatus according to claim 2, wherein the control unit varies the ratio of the roll-correctable range and the ratio of the translation-correctable range in the electronic correction according to a level of an effect of image blur correction, the level of the effect of the first tilt correction, and the level of the effect of the second tilt correction.

4. The tilt correction apparatus according to claim 3, wherein the control unit varies the ratio of the roll-correctable range, the ratio of the translation-correctable range, and a ratio of a rolling-shutter-distortion-correctable range in the electronic correction according to the level of the effect of the image blur correction, the level of the effect of the first tilt correction, and the level of the effect of the second tilt correction.

5. The tilt correction apparatus according to claim 4, wherein the control unit varies a ratio of a translation-rolling-shutter-distortion-correctable range and a ratio of a roll-rolling-shutter-distortion-correctable range according to the level of the effect of the image blur correction, the level of the effect of the first tilt correction, and the level of the effect of the second tilt correction.

6. An image-blur correction apparatus comprising:

a designation unit configured to designate a level of an effect of image-blur correction and a level of an effect of first tilt correction of an imaging apparatus having an optical axis as a rotary axis;

an electronic correction unit configured to execute at least one of the image-blur correction and the first tilt correction by moving an image clipping range set within an imaging screen; and

a control unit configured to vary a ratio of an image-blur-correctable range and a ratio of a first tilt-correctable range in an electronic correction according to the level of the effect of the image-blur correction and the level of the effect of the first tilt correction,

wherein each unit is implemented by one or more processors, circuitry, or a combination thereof.

7. The image-blur correction apparatus according to claim 6,

wherein the image-blur-correctable range is a translation-correctable range, and

wherein the first tilt-correctable range is a roll-correctable range.

8. The image-blur correction apparatus according to claim 7, wherein the control unit varies a ratio of the translation-correctable range and a ratio of the roll-correctable range in the electronic correction according to the level of the effect of the image-blur correction, the level of the effect of the first tilt correction, and a level of an effect of second tilt correction of the imaging apparatus having an axis orthogonal to the optical axis as a rotary axis.

9. The image-blur correction apparatus according to claim 8, wherein the control unit varies the ratio of the translation-correctable range, the ratio of the roll-correctable range, and a ratio of a rolling-shutter-distortion-correctable range in the electronic correction according to the level of the effect of the image-blur correction, the level of the effect of the first tilt correction, and the level of the effect of the second tilt correction.

10. The image-blur correction apparatus according to claim 9, wherein the control unit varies a ratio of a translation-rolling-shutter-distortion-correctable range and a ratio of a roll-rolling-shutter-distortion-correctable range according to the level of the effect of the image-blur correction, the level of the effect of the first tilt correction, and the level of the effect of the second tilt correction.

11. A method of controlling a tilt correction apparatus, the method comprising:

designating a level of an effect of first tilt correction of an imaging apparatus having an optical axis as a rotary axis and a level of an effect of second tilt correction of the imaging apparatus having an axis orthogonal to the optical axis as a rotary axis in a manipulation process;

executing at least one of the first tilt correction and the second tilt correction by moving an image clipping range set within an imaging screen in an electronic correction process; and

varying a ratio of a first tilt-correctable range and a ratio of a second tilt-correctable range in the electronic correction process according to the level of the effect of the first tilt correction and the level of the effect of the second tilt correction in a calculation process.

12. A method of controlling an image-blur correction apparatus, the method comprising:

designating a level of an effect of image-blur correction and a level of an effect of first tilt correction of an imaging apparatus having an optical axis as a rotary axis in a manipulation process;

executing at least one of the image-blur correction and the first tilt correction by moving an image clipping range set within an imaging screen in an electronic correction process; and

varying a ratio of an image-blur-correctable range and a ratio of a first tilt-correctable range in the electronic correction process according to the level of the effect of the image-blur correction and the level of the effect of the first tilt correction in a calculation process.