Image processing apparatus and image processing method

Patent metadata

Field	Value
Publication number	US-11445888-B2
Application number	US-202117149759-A
Country	US
Kind code	B2
Filing date	Jan 15, 2021
Priority date	Mar 13, 2020
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

An image processing apparatus includes a linear matrix operation unit configured to set a matrix coefficient in accordance with an input image signal, and perform a linear matrix operation on the image signal using the set matrix coefficient.

First claim

What is claimed is:

1. An image processing apparatus comprising:
a processor configured to
set a matrix coefficient in accordance with an input image signal, and
perform a linear matrix operation on the image signal using the set matrix coefficient, wherein

the processor including a plurality of arithmetic units each of which is configured to perform a linear matrix operation on the image signal using mutually different matrix coefficients, and
the processor further configured to
determine whether an operation result of an arithmetic unit of the plurality of arithmetic units satisfies a predetermined condition, the predetermined condition being whether a luminance calculated by using the operation result of the arithmetic unit is negative,
output the operation result of the arithmetic unit selected in accordance with a result of the determination made by the processor, and
output the image signal in a case where the image signal satisfies another predetermined condition.

2. The image processing apparatus according to claim 1 , wherein the predetermined condition is whether a luminance calculated by using the operation result of the arithmetic unit and a color difference calculated by using the operation result of the arithmetic unit satisfy predetermined conditions.

3. The image processing apparatus according to claim 1 , wherein
the processor is configured to calculate a ratio used for combining the operation results of the arithmetic units in accordance with the operation results of the arithmetic units,
combine the operation results of the arithmetic units based on the ratio calculated by the processor, and
output a combined result.

4. The image processing apparatus according to claim 1 , wherein the predetermined condition is whether the luminance calculated by using the operation result in a case where the image signal has been input to the arithmetic unit and a color difference calculated by using the operation result in a case where the image signal has been input to the arithmetic unit satisfy predetermined conditions.

5. The image processing apparatus according to claim 1 , wherein
the processor is further configured to
calculate a ratio used for combining the operation results of the arithmetic units in accordance with the image signal,
combine the operation results of the arithmetic units based on the ratio, and
output a combined result.

6. The image processing apparatus according to claim 1 , wherein the
processor is further configured to modulate a matrix coefficient of the arithmetic unit in accordance with a result of the determination made by the processor.

7. An image processing method comprising:
setting a matrix coefficient in accordance with an input image signal;
performing, with a processor, a linear matrix operation on the image signal using the set matrix coefficient, the processor including a plurality of arithmetic units each of which is configured to perform a linear matrix operation on the image signal using mutually different matrix coefficients;
determining with the processor whether an operation result of an arithmetic unit of the plurality of arithmetic units satisfies a predetermined condition, the predetermined condition being whether a luminance calculated by using the operation result of the arithmetic unit is negative;
outputting the operation result of the arithmetic unit selected in accordance with a result of the determination made by the processor; and
outputting the image signal in a case where the image signal satisfies another predetermined condition.

Assignees

• Sony Olympus Medical Solutions Inc

Inventors

• Michihata Taihei
• Myoken Hiroshi
• Mitsui Satoshi

Classifications

• H04N23/957

  Light-field or plenoptic cameras or camera modules · CPC title

• H04N23/555

  for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes · CPC title

• A61B1/000095 Primary

  for image enhancement · CPC title

• G06K15/1878

  Adjusting colours (image colour correction or control for documents in general H04N1/60) · CPC title

• A61B1/045

  Control thereof · CPC title