Evaluation method for image stabilization effect of imaging apparatus, evaluation device, and program storage medium

Patent metadata

Field	Value
Publication number	US-12375807-B2
Application number	US-202218068646-A
Country	US
Kind code	B2
Filing date	Dec 20, 2022
Priority date	Jan 7, 2022
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

An evaluation method for an image stabilization effect of an imaging apparatus comprising: acquiring a first image obtained by imaging an object in a state in which the imaging apparatus is vibrated; acquiring a second image obtained by imaging the object in a state in which the imaging apparatus is stationary; and calculating an evaluation value indicating an image stabilization effect in a peripheral region of the imaging apparatus, based on a difference in blur amounts between the first image and the second image in the peripheral region deviated from the center of an optical axis.

First claim

What is claimed is:

1. An evaluation method for an image stabilization effect of an imaging apparatus,
the evaluation method comprising:
acquiring a first image obtained by imaging an object in a state in which the imaging apparatus is vibrated;
acquiring a second image obtained by imaging the object in a state in which the imaging apparatus is stationary;
calculating an evaluation value indicating an image stabilization effect in a plurality of peripheral regions of the imaging apparatus, by evaluating a difference in blur amounts between the first image and the second image in each of the peripheral regions deviated from the center of an optical axis; and
generating and displaying on a display screen in graphical format an image distinguishably indicating an image stabilization effect in the peripheral regions of the imaging apparatus and an image stabilization effect in a central region of the imaging apparatus based on the evaluation value, wherein the central region includes the center of the optical axis.

2. The evaluation method according to claim 1 ,
wherein the object includes a first pattern in which contrast in a vertical direction can be detected and a second pattern in which contrast in a horizontal direction can be detected, and
wherein, in the evaluation, the evaluation value is calculated by using a first blur amount of a first peripheral region in which the first pattern is imaged and a second blur amount of a second peripheral region in which the second pattern is imaged.

3. The evaluation method according to claim 2 ,
wherein the evaluation value includes an evaluation value with respect to a roll blur, and
wherein, in the evaluation, combining processing for combining the first blur amount and the second blur amount is performed, and the evaluation value with respect to a roll blur is calculated.

4. The evaluation method according to claim 1 ,
wherein, in the evaluation, the evaluation value is calculated by performing statistical processing on blur amounts in the peripheral regions in which the image heights from the optical axis center are the same.

5. The evaluation method according to claim 4 ,
wherein, in the evaluation, any one of the maximum value, the minimum value, the average value, and the variance of the blur amounts of the peripheral regions is calculated and the statistical processing is performed.

6. The evaluation method according to claim 1 ,
wherein the object includes a plurality of arrayed patterns, and
wherein, in the evaluation, the evaluation value is calculated based on the blurring of the object at each position in an imaging range of the imaging apparatus, and a map showing the distribution of the evaluation value indicating the image stabilization effect in the peripheral regions is generated.

7. The evaluation method according to claim 1 ,
wherein, in the evaluation, information indicating at least any one of a luminance change, a change in resolution, and a change in distortion aberration due to a difference in image height from the center of the optical axis of the imaging apparatus is output in association with information regarding the evaluation value.

8. The evaluation method according to claim 1 , further comprising:
generating and displaying, based on the calculated evaluation values, a display indicating in different colors or color intensity the comparative image stabilization effect in the peripheral regions of the imaging apparatus to the image stabilization effect in said central region of the imaging apparatus, and further indicating an area with a highest stabilization effect.

9. An evaluation device for an image stabilization effect of an imaging apparatus,
the evaluation device comprising:
a display screen; and
at least one processor, executing computer instructions stored in at least one memory, causing the device to:
operate a first acquisition unit configured to acquire a first image obtained by imaging an object in a state in which the imaging apparatus is vibrated;
operate a second acquisition unit configured to acquire a second image obtained by imaging the object in a state in which the imaging apparatus is stationary;
calculate an evaluation value indicating an image stabilization effect in a peripheral region of the imaging apparatus, based on a difference in blur amounts between the first image and the second image in the peripheral region deviated from the center of an optical axis; and
generate and transmit for display on the display screen in graphical format an image distinguishably indicating an image stabilization effect in the peripheral regions of the imaging apparatus and an image stabilization effect in a central region of the imaging apparatus based on the evaluation value, wherein the central region includes the center of the optical axis.

10. The evaluation device according to claim 9 , wherein the processor executing computer instructions causes the device to:
generate and transmit for display, based on the calculated evaluation values, a display indicating in different colors or color intensity the comparative image stabilization effect in the peripheral regions of the imaging apparatus to the image stabilization effect in said central region of the imaging apparatus, and further indicates an area with a highest stabilization effect.

11. A non-transitory storage medium, storing computer instructions that are operated by a computer processor to cause an evaluation device to perform:
acquiring a first image obtained by imaging an object in a state in which an imaging apparatus is vibrated;
acquiring a second image obtained by imaging the object in a state in which the imaging apparatus is stationary;
calculating an evaluation value indicating an image stabilization effect in a peripheral region of the imaging apparatus, based on a difference in blur amounts between the first image and the second image in the peripheral region deviated from the center of an optical axis; and
generating and transmitting for display on a display screen in graphical format an image distinguishably indicating an image stabilization effect in the peripheral regions of the imaging apparatus and an image stabilization effect in a central region of the imaging apparatus based on the evaluation value, wherein the central region includes the center of the optical axis.

12. The storage medium of claim 11 , wherein the processor executes computer instructions causing the evaluation device to perform:
generating and displaying, based on the calculated evaluation values, a display indicating in different colors or color intensity the comparative image stabilization effect in the peripheral regions of the imaging apparatus to the image stabilization effect in said central region of the imaging apparatus, and further indicating an area with a highest stabilization effect.

Assignees

• Canon Kk

Inventors

• Yasuda Ryuichiro
• Saito Junichi
• Saito Mitsuhiro
• Itagaki Shimpei
• Naito Go
• Sato Kyosuke
• Uesugi Tomomi
• Nomura Naoki

Classifications

• G06T5/70

  Denoising; Smoothing · CPC title

• G06V10/60

  relating to illumination properties, e.g. using a reflectance or lighting model · CPC title

• G06V10/758

  Involving statistics of pixels or of feature values, e.g. histogram matching · CPC title

• G06V10/761

  Proximity, similarity or dissimilarity measures · CPC title

• H04N17/002

  for television cameras · CPC title