COLOR ESTIMATION SYSTEM AND COLOR ESTIMATION METHOD - Olympus Endo Technology America Inc.

Title:

COLOR ESTIMATION SYSTEM AND COLOR ESTIMATION METHOD

Document Type and Number:

Japanese Patent JP3960989

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To estimate a color with high precision when estimating the color of a subject using the spectral sensitivity characteristics of a camera measured in advance.
SOLUTION: The color estimation system comprises an image photographing unit 10 for photographing a color chart of which the spectral reflectance is known and the subject of which the spectral reflectance is unknown by a color image photographing device, a color-chart selection unit 18 for designating what color chart is used at the time of color-chart photographing, a color-chart spectral reflectance database 20 which stores spectral reflectance information of a plurality of color charts, and an image processing unit 22 for estimating the spectral reflectance or the color of the subject from a color image signal obtained by photographing the subject by the image photographing unit 10 using a signal value of the image of the color chart photographed by the image photographing unit 10, the spectral reflectance information of the color chart acquired from the color-chart spectral reflectance database 20 on the basis of the information on the color chart designated by the color-chart selection unit 18, and the spectral sensitivity characteristics of the color image photographing device.

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Inventors:

Takeyuki Aido
Toru Wada
Hironobu Komiya

Application Number:

JP2004210049A

Publication Date:

August 15, 2007

Filing Date:

July 16, 2004

Export Citation:

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Assignee:

Olympus Endo Technology America Inc.

International Classes:

G01J3/46; G01J3/52

Domestic Patent References:

JP10260109A
JP5223642A
JP2000152269A
JP2001299448A

Attorney, Agent or Firm:

Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto

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