Image processing device, information generation device, and information generation method

Patent metadata

Field	Value
Publication number	US-10904503-B2
Application number	US-201916670239-A
Country	US
Kind code	B2
Filing date	Oct 31, 2019
Priority date	Aug 24, 2016
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A correction information generation section 50 emits measurement light having uniform intensity onto a polarized image acquisition section 20 acquiring a polarized image. Further, on the basis of a measured polarized image acquired from the polarized image acquisition section 20, the correction information generation section 50 generates variation correction information for correcting sensitivity variations caused in the measured polarized image due to difference in polarization direction, and causes a correction information storage section 30 to store the generated variation correction information. A correction processing section 40 then corrects the sensitivity variations caused in the polarized image acquired by the polarized image acquisition section 20 due to the difference in polarization direction by using the pre-generated variation correction information stored in the correction information storage section 30. Therefore, the polarized image outputted from the correction processing section 40 becomes a high-quality polarized image with, for example, its sensitivity variations corrected.

First claim

The invention claimed is:

1. An information generation device comprising:
a circuitry configured to:
emit measurement light having uniform intensity onto a polarized image acquisition section acquiring a polarized image through a flat diffusion plate; and
generate correction information for correcting sensitivity variations caused in the polarized image due to a difference in polarization direction, on a basis of the polarized image acquired by the polarized image acquisition section and on a basis of a focal length and an optical axis center of the polarized image acquisition section.

2. The information generation device according to claim 1 , wherein the circuitry emits unpolarized light as the measurement light.

3. The information generation device according to claim 1 , wherein the circuitry emits the measurement light onto the polarized image acquisition section through a spherical diffusion plate.

4. The information generation device according to claim 1 , wherein the circuitry emits the measurement light onto the polarized image acquisition section through a flat diffusion plate, and changes an orientation of the polarized image acquisition section with respect to the flat diffusion plate and then generates the correction information.

5. An information generation method comprising:
emitting measurement light having uniform intensity from a measurement light irradiation section onto a polarized image acquisition section acquiring a polarized image through a flat diffusion plate; and
generating, by a correction information generation processing section, correction information for correcting sensitivity variations caused in the polarized image due to difference in polarization direction, on a basis of the polarized image acquired by the polarized image acquisition section and on a basis of a focal length and an optical axis center of the polarized image acquisition section.

6. The information generation method according to claim 5 , wherein unpolarized light is emitted as the measurement light.

7. The information generation method according to claim 5 , wherein the measurement light is emitted onto the polarized image acquisition section through a spherical diffusion plate.

8. The information generation method according to claim 5 , wherein
the measurement light is emitted onto the polarized image acquisition section through a flat diffusion plate, and
an orientation of the polarized image acquisition section is changed with respect to the flat diffusion plate and the correction information is then generated.

Assignees

• Sony Corp

Inventors

• Kondo Yuhi
• Kaizu Shun
• Kurita Teppei
• Zhuang Tuo
• Hirasawa Yasutaka
• Lu Ying

Classifications

• H04N23/843

  Demosaicing, e.g. interpolating colour pixel values · CPC title

• H04N23/88

  for colour balance, e.g. white-balance circuits or colour temperature control · CPC title

• H04N23/60

  Control of cameras or camera modules · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/56

  provided with illuminating means · CPC title