Imaging apparatus, image processing method, and medium

Patent metadata

Field	Value
Publication number	US-2016100146-A1
Application number	US-201514872223-A
Country	US
Kind code	A1
Filing date	Oct 1, 2015
Priority date	Oct 7, 2014
Publication date	Apr 7, 2016
Grant date	—

Abstract

An imaging apparatus acquires an image including a still image and a moving image, tracks a position of the object within an image capturing area of the image, records a luminance change within a region of the object being tracked, detects a point having a luminance change amount equal to or greater than a threshold, as a specular reflection area, calculates an object correction value, which is a color correction value of the object, based on color information of the specular reflection area, and corrects color overlap of the image based on the object correction value.

First claim

1 . An imaging apparatus, comprising:
an imaging unit configured to acquire an image including a still image and a moving image; and circuitry configured to correct color overlap of the image based on color information of specular reflection light of a light source for illuminating an object, the circuitry being further configured to, track a position of the object within an image capturing area of the image, record a luminance change within a region of the object being tracked, detect a point having a luminance change amount equal to or greater than a threshold, as a specular reflection area, calculate an object correction value, which is a color correction value of the object, based on color information of the specular reflection area, and correct color overlap of the image based on the object correction value.

2 . The imaging apparatus according to claim 1 , further comprising:
a memory configured to store, as correction data, an image previously acquired by an imaging unit, before the image of the object is captured, wherein the circuitry executes color overlap correction on the stored correction data and a still image within the image capturing area that is captured by the imaging unit.

3 . The imaging apparatus according to claim 1 ,
wherein, for detecting a specular reflection area, the circuitry previously measures angular dependency of a reflectance of a reference object, and determines the threshold based on a reflectance under a specular reflection condition and a reflectance under a diffuse reflection condition.

4 . The imaging apparatus according to claim 1 ,
wherein the circuitry calculates a background part correction value, which is a color correction value of a background part not determined to be the object, and wherein in a case in which the object correction value and the background part correction value differ from each other by a certain value or more, the circuitry executes color overlap correction only on a region being tracked, using the object correction value.

5 . The imaging apparatus according to claim 1 ,
wherein the circuitry tracks the object on the image using a differentiation technique.

6 . The imaging apparatus according to claim 1 ,
wherein the circuitry tracks the object on the image using an optical flow.

7 . A method of correcting color overlap of an image based on color information of specular reflection light of a light source for illuminating an object, the method comprising:
acquiring an image including a still image and a moving image; tracking a position of the object within an image capturing area of the image; recording a luminance change within a region of the object being tracked; detecting a point having a luminance change amount equal to or greater than a threshold, as a specular reflection area; calculating an object correction value, which is a color correction value of the object, based on color information of the specular reflection area; and correcting color overlap of the image based on the object correction value.

8 . A non-transitory recording medium which, when executed by one or more processors, cause the processors to perform a method of correcting color overlap of an image based on color information of specular reflection light of a light source for illuminating an object, the method comprising:
acquiring an image including a still image and a moving image; tracking a position of the object within an image capturing area of the image; recording a luminance change within a region of the object being tracked; detecting a point having a luminance change amount equal to or greater than a threshold, as a specular reflection area; calculating an object correction value, which is a color correction value of the object, based on color information of the specular reflection area; and correcting color overlap of the image based on the object correction value.

Assignees

• Sakai Naoki
• Ricoh Co Ltd

Inventors

• Sakai Naoki

Classifications

• H04N23/71

  Circuitry for evaluating the brightness variation · CPC title

• H04N23/88

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

• H04N23/12

  with one sensor only · CPC title

• H04N5/144 Primary

  Movement detection (for video coding H04N19/503; analysis of motion in general G06T7/20) · CPC title

• G06T2207/30241

  Trajectory · CPC title