IMAGE PROCESSING APPARATUS, METHOD FOR CONTROLLING THE SAME, AND STORAGE MEDIUM

• US 20150381893A1
• Filed: 06/24/2015
• Published: 12/31/2015
• Est. Priority Date: 06/27/2014
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Miyasako, Kenichi
• Granted Patent: US 9,723,208 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04N 23/6811 based on the image signal
• 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

Abstract

An image processing apparatus comprises a first calculation unit for calculating a shake correction amount for a moving image by using a shake signal output from shake detection unit, a second calculation unit for calculating a shake correction amount for a still image by using a shake signal output from the shake detection unit, a generation unit for generating, based on a comparison result between the shake correction amount for the moving image and the shake correction amount for the still image, evaluation values serving as indices used for extracting a still image from among frame images of the moving image, and a recording unit for recording the evaluation values in association with the frame images of the moving image.

Claims

1. An image processing apparatus comprising:

a first calculation unit configured to calculate a shake correction amount for a moving image by using a shake signal output from a shake detection unit;

a second calculation unit configured to calculate a shake correction amount for a still image by using a shake signal output from the shake detection unit;

a generation unit configured to generate, based on a comparison result between the shake correction amount for the moving image and the shake correction amount for the still image, evaluation values serving as indices used for extracting a still image from among frame images of the moving image; and

a recording unit configured to record the evaluation values in association with the frame images of the moving image.

2. The image processing apparatus according to claim 1,

wherein the image processing apparatus generates an evaluation value that indicates an amount of shake on an image sensing plane of an image sensor based on a difference between the shake correction amount for the moving image and the shake correction amount for the still image.

3. The image processing apparatus according to claim 1, further comprising a display unit configured to display information on the evaluation values in association with the frame images of the moving image.

4. The image processing apparatus according to claim 1, further comprising a control unit configured to control an optical shake correction unit by using the shake correction amount for the moving image.

5. The image processing apparatus according to claim 1,

wherein the generation unit defines an amount of shake of each of the frame images as an integrated value of a difference per unit time between the shake correction amount for the moving image and the shake correction amount for the still image, and calculates the amount of shake of each of the frame images such that the integrated value increases as a change in angle of a vector of the difference per unit time between the shake correction amount for the moving image and the shake correction amount for the still image increases.

6. The image processing apparatus according to claim 1, further comprising a determination unit configured to determine whether or not panning is being performed,

wherein when the determination unit determines that panning is being performed, the generation unit calculates a panning speed based on an output from the shake detection unit, and obtains data indicating the amount of shake of each of the frame images by subtracting a motion amount of the panning from the shake correction amount for the moving image and the shake correction amount for the still image.

7. An image processing apparatus comprising:

a first calculation unit configured to calculate a shake correction amount for a moving image by using a shake signal output from a shake detection unit;

a second calculation unit configured to calculate a shake correction amount achieving a higher anti-shake performance than the shake correction amount for the moving image, by using a shake signal output from the shake detection unit;

a generation unit configured to generate, based on a comparison result between the shake correction amount for the moving image and the shake correction amount achieving a higher anti-shake performance than the shake correction amount for the moving image, evaluation values serving as indices used for extracting a still image from among frame images of the moving image; and

a recording unit configured to record the evaluation values in association with the frame images of the moving image.

8. A method for controlling an image processing apparatus, comprising:

a first calculation step of calculating a shake correction amount for a moving image by using a shake signal output from a shake detection unit;

a second calculation step of calculating a shake correction amount for a still image by using a shake signal output from the shake detection unit;

a generation step of generating, based on a comparison result between the shake correction amount for the moving image and the shake correction amount for the still image, evaluation values serving as indices used for extracting a still image from among frame images of the moving image; and

a recording step of recording the evaluation values in association with the frame images of the moving image.

10. A non-transitory computer-readable storage medium storing therein a program for causing a computer to perform the steps of the method according to claim 8.

9. A method for controlling an image processing apparatus, comprising:

a first calculation step of calculating a shake correction amount for a moving image by using a shake signal output from a shake detection unit;

a second calculation step of calculating a shake correction amount achieving a higher anti-shake performance than the shake correction amount for the moving image, by using a shake signal output from the shake detection unit;

a generation step of generating, based on a comparison result between the shake correction amount for the moving image and the shake correction amount achieving a higher anti-shake performance than the shake correction amount for the moving image, evaluation values serving as indices used for extracting a still image from among frame images of the moving image; and

a recording step of recording the evaluation values in association with the frame images of the moving image.

11. A non-transitory computer-readable storage medium storing therein a program for causing a computer to perform the steps of the method according to claim 9.