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Image Analysis

Image-processing-apparatus-and-method-for-converting-data-dependent-on-a-first-illuminating-light-into-data-dependent-on-a-second-illuminating-light

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Image processing apparatus and method for converting data dependent on a first illuminating light into data dependent on a second illuminating light

Details

Inventors: Shiraiwa, Yoshinobu; Mizuno, Toshiyuki; Ohsaki, Yumiko;
Assignee: Canon Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Brier; Jeffery A.
Assistant Examiner:
Attorney, Agent or Firm: Fitzpatrick, Cella, Harper & Scinto

An image processing method converts data dependent on a first illuminating light into data dependent on a second illuminating light by, storing conversion conditions for plural illuminating light sources of different color rendering properties, generating data indicating the proportion of synthesis of the stored conversion conditions of the plural light sources, corresponding to the second illuminating light, generating a first conversion condition from the stored conversion conditions for the plural illuminating light sources according to the data indicating the proportion of synthesis, generating a second conversion condition for color temperature conversion based on color temperature information from the second illuminating light, and converting data dependent on the first illuminating light into data dependent on the second illuminating light using the first and second conversion conditions.

DETAILED DESCRIPTION An object of the present invention is to obtain data under desired illumination in a simple manner with a limited memory capacity.
The above-mentioned object can be attained, according to the present invention, by an image processing method for converting data dependent on a first illuminating light into data dependent on a second illuminating light, the method comprising steps of storing conversion data for plural illuminating lights of different characteristics, generating data corresponding to the second illuminating light and indicating the proportion of synthesis of the plural illuminating lights of the different characteristics, and converting the data dependent on the first illuminating light into those dependent on the second illuminating light, based on the conversion data of the plural illuminating lights of different characteristics and on the data indicating the proportion of synthesis.
Another object of the present invention is to compensate the appearance of the color of the displayed image regardless of the observing environment.
Still another object of the present invention is to provide a user interface allowing easy setting of the correction for the ambient light.
The above-mentioned objects can be attained, according to the present invention, by an image processing method comprising steps of: setting a coefficient indicating the ambient illuminating light characteristics according a manual instruction; entering image data dependent on an input device; and effecting correction for the ambient light on the entered image data based on the input device, a display device and the ambient illuminating light characteristics coefficient, thereby achieving conversion to image data dependent on the display device.
Still other objects of the present invention, and the features thereof, will become fully apparent from the following description which is to be taken in conjunction with the attached drawings.

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