IMAGE-BLUR CORRECTION APPARATUS, TILT CORRECTION APPARATUS, METHOD OF CONTROLLING IMAGE-BLUR CORRECTION APPARATUS, AND METHOD OF CONTROLLING TILT CORRECTION APPARATUS

• US 20180041710A1
• Filed: 10/05/2017
• Published: 02/08/2018
• 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
• Granted Patent: US 9,924,100 B2
• Time in Patent Office: 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. 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 changing an image clipping range set within an imaging screen; and

a control unit configured to vary a ratio of a correctable range of trapezoidal distortion caused by tilting of the image-blur correction apparatus and a ratio of a first tilt-correctable range in the 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.

2. The image-blur correction apparatus according to claim 1,

wherein the designation unit designates 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, and

wherein the control unit varies the ration of the correctable range of trapezoidal distortion caused by tilting of the image-blur correction apparatus, the ratio of the first tilt-correctable range, and a ratio of a second tilt-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.

3. The image-blur 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.

4. The mage-blur correction apparatus according to claim 3,

wherein the translation-correction is executed by an optical correction by driving an imaging element or a lens constituting, an imaging optical system in addition to the electronic correction by driving of the electronic correction unit.

5. 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 axis orthogonal to the 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 changing an image clipping range set within an imaging screen; and

a control unit configured to vary a ratio of a correctable range of trapezoidal distortion caused by tilting of the image-blur correction apparatus and a ratio of a first tilt-correctable range in the 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.

6. The image-blur correction apparatus according to claim 5,

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

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

wherein the translation-correction is executed by an optical correction by driving an imaging element or a lens constituting an imaging optical system in addition to the electronic correction by driving of the electronic correction unit.

8. 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 changing an image clipping range set within an imaging screen in an electronic correction process; and

varying a ratio of a correctable range of trapezoidal distortion caused by tilting of the image-blur correction apparatus and a ratio of a first tilt-correctable range in the electronic correction process according to the level of the effect of the i age-blur correction and the level of the effect of the first tilt correction in a calculation process.

9. 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 axis orthogonal to the 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 changing an image clipping range set within an imaging screen in an electronic correction process; and

varying a ratio of a correctable range of trapezoidal distortion caused by tilting of the image-blur correction apparatus 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.