Imaging apparatus, and image blur correcting method of imaging apparatus

• US 10,110,819 B2
• Filed: 09/28/2016
• Issued: 10/23/2018
• Est. Priority Date: 09/29/2015
• Status: Active Grant

• Current Assignee: OM Digital Solutions Corporation
• Original Assignee: Olympus Corporation
• Inventors: Tsuchiya, Hitoshi
• Primary Examiner(s): Haliyur, Padma
• Application Number:
  US15/278,784
• Publication Number:
  US 20170094175A1
• Time in Patent Office: 755 Days
• CPC Class Codes: H04N 23/631 Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
• CPC Class Codes: H04N 23/663 for controlling interchangeable camera parts based on electronic image sensor signals
• CPC Class Codes: H04N 23/6812 based on additional sensors, e.g. acceleration sensors
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position
• CPC Class Codes: H04N 23/69 Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
• CPC Class Codes: H04N 5/2628 Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 5/911 for the suppression of noise H04N5/932 takes precedence

Abstract

An imaging apparatus according to one embodiment comprises an imaging element, a photographing optical system, a blur detecting section, a blur correcting section, an imaging control section, and a projection converting section. The blur detecting section detects an image moving amount of a subject image. The blur correcting section adjusts a positional relation between the subject image and an imaging plane of the The imaging element on the basis of the image moving amount. The imaging control section acquires an equidistant projection image corresponding to the subject image by the imaging element. The projection converting section converts the equidistant projection image into an image of a different projection system.

Claims

1. An imaging apparatus comprising:

an imaging element comprising an imaging plane in which pixels to convert light into electric signals are arranged;

a photographing optical system that forms a subject image of equidistant projection on the imaging plane; and

a processor executing instructions to implement;

a blur detecting section that detects an image moving amount of the subject image;

a blur correcting section that adjusts a positional relation between the subject image and the imaging plane on the basis of the image moving amount;

an imaging control section that acquires an equidistant projection image corresponding to the subject image by the imaging element; and

a projection converting section that converts the equidistant projection image into an image of a different system;

wherein the blur correcting section moves the imaging plane on the basis of the image moving amount, and

the projection converting section has an optical axis center converting section that converts a position of an optical axis center of the photographing optical system into a center of a field angle in the equidistant projection image on the basis of a moving amount of the imaging plane, and the projection converting section defines the center of the field angle of the image converted by the optical axis center converting section as an axis to perform central protection generation, thereby converting the equidistant projection image into a central projection image.

3. The imaging apparatus according to claim 1,

wherein the projection converting section judges whether or not to convert the equidistant projection image into the image of the different projection system on the basis of optical characteristics of the photographing optical system.

4. The imaging apparatus according to claim 3,

wherein the projection converting section converts the equidistant projection image into the image of the different projection system on the basis of optical characteristics of the photographing optical system, in a case of converting the equidistant projection image into the image of the different projection system.

5. The imaging apparatus according to claim 3,

wherein the photographing optical system comprises a memory that stores optical characteristic information indicating the optical characteristics of the photographing optical system,

the processor executing instructions to further implement:

an acquiring section that acquires the optical characteristic information from the memory of the photographing optical system,

wherein the projection converting section judges whether or not to convert the equidistant projection image into the image of the different projection system on the basis of the optical characteristic information acquired by the acquiring section.

6. The imaging apparatus according to claim 5,

wherein the optical characteristic information includes information to calculate a diagonal field angle of the equidistant projection image, and information to judge the projection system of the photographing optical system.

7. The imaging apparatus according to claim 1,

wherein the blur detecting section further detects an image rotating amount of the subject and

the blur correcting section rotates the imaging plane on the basis of the image rotating amount.

2. An imaging apparatus comprising:

an imaging element comprising an imaging plane in which pixels to convert light into electric signals are arranged;

a photographing optical system that forms a subject image of equidistant projection on the imaging plane; and

a processor executing instructions to implement;

an imaging control section that acquires an equidistant projection image corresponding to the subject image by the imaging element;

a blur detecting section that detects an image moving amount of the subject image;

a blur correcting section that specifies an effective region in the equidistant projection image on the basis of the image moving amount;

a projection converting section that converts, into an image of a different projection system, an image corresponding to the effective region of the equidistant projection image which is specified by the blur correcting section;

wherein the blur correcting section moves the effective region on the basis of the image moving amount, and

the projection converting section has an optical axis center converting section that converts a position of an optical axis center of the photographing optical system into a center of a field angle in the equidistant projection image on the basis of a moving amount of the effective region, and the projection converting section defines the optical axis center converted by the optical axis center converting section as an axis to perform conversion into a central projection image.

8. The imaging apparatus according to claim 2,

wherein the blur detecting section further detects an image rotating amount of the subject image, and

the blur correcting section rotates the equidistant projection image on the basis of the image rotating amount, and specifies the effective region in the equidistant projection image rotated on the basis of the image moving amount.

9. The imaging apparatus according to claim 2,

wherein the projection converting section judges whether or not to convert the equidistant projection image into the image of the different projection system on the basis of optical characteristics of the photographing optical system.

10. The imaging apparatus according to claim 9,

wherein the projection converting section converts the equidistant projection image into the image of the different projection system on the basis of the optical characteristics of the photographing optical system, in a case of converting the equidistant projection image into the image of the different projection system.

11. The imaging apparatus according to claim 9,

wherein the photographing optical system comprises a memory that stores optical characteristic information indicating the optical characteristics of the photographing optical system,

the processor executing instructions to further implement:

an acquiring section that acquires the optical characteristic information from the memory of the photographing optical system,

wherein the projection converting section judges whether or not to convert the equidistant projection image into the image of the different projection system on the basis of the optical characteristic information acquired by the acquiring section.

12. The imaging apparatus according to claim 11,

wherein the optical characteristic information includes information to calculate a diagonal field angle of the equidistant projection image, and information to judge the projection system of the photographing optical system.

13. An image blur correcting method in an imaging apparatus comprising an imaging element comprising an imaging plane in which pixels to convert light into electric signals are arranged, and a photographing optical system that forms a subject image of equidistant projection on the imaging plane, the method comprising:

detecting an image moving amount of the subject image;

adjusting a positional relation between the subject image and the imaging plane by moving the imaging plane on the basis of the image moving amount;

acquiring an equidistant projection image corresponding to the subject image by the imaging element;

converting a position of an optical axis center of the photographing optical system into a center of a field angle in the equidistant projection image on the basis of a moving amount of the imaging plane; and

defining the center of the field angle of the converted image as an axis to perform central projection generation, thereby converting the equidistant projection image into a central projection image.

15. The image blur correcting method according to claim 13, comprising:

further detecting an image rotating amount of the subject image; and

rotating the imaging plane on the basis of the image rotating amount.

14. An image blur correcting method in an imaging apparatus comprising an imaging element including an imaging plane in which pixels to convert light into electric signals are arranged, and a photographing optical system that forms a subject image of equidistant projection on the imaging plane, the method comprising:

acquiring an equidistant projection image corresponding to the subject image of the equidistant projection by the imaging element;

detecting an image moving amount of the subject image;

moving an effective region in the equidistant projection image on the basis of the image moving amount;

converting a position of an optical axis center of the photographing optical system into a center of a field angle in the equidistant projection image on the basis of a moving amount of the effective region; and

defining the converted optical axis center as an axis to perform conversion an image corresponding to the effective region of the equidistant projection image into a central projection image.

16. The image blur correcting method according to claim 14, comprising:

further detecting an image rotating amount of the subject image; and

rotating the equidistant projection image on the basis of the image rotating amount, and specifying the effective region in the equidistant projection image rotated on the basis of the image moving amount.