Image capturing apparatus provided with image processor

a technology of image processing and image capturing apparatus, which is applied in the direction of instruments, television systems, color signal processing circuits, etc., can solve the problems of difficult to determine the white saturation level based on this convex portion, uniform illumination, and inability to obtain suitable -characteristics
US20050024508A1Inactive Publication Date: 2005-02-03MINOLTA CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
MINOLTA CO LTD
Publication Date
2005-02-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

An image capturing apparatus capable of performing a suitable illuminance nonuniformity correction by setting a suitable γ-characteristic every block even in the case that the size of a character image projected on a sensing surface changes according to an image capturing magnification, and capable of extracting a boundary area between a white board portion and a background portion and applying a suitable image processing to this boundary area during the illuminance nonuniformity correction for a picked image, and capable of image capturing a representation such as characters drawn on a white board in such a manner that an obtained image is clear and easy to see by suitably performing an illuminance nonuniformity correction even in the case of color image capturing, and capable of detecting a regularly reflected light with high accuracy and can thereby securely prevent an error of obtaining an image of low quality by image capturing, and capable of preventing an error in flash-image capturing a representation such as characters drawn on a white board under insufficient illumination light and effectively perform an illuminance nonuniformity correction.
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Description

[0001] This application is based on patent application Nos. 9-12999, 9-13000, 9-13001, 9-13002, 9-13003, 9-13004, 9-13005, 9-13006, 9-13019, 9-13020, and 9-13021 filed in Japan, the contents of which is hereby incorporated by reference. BACKGROUND OF THE INVENTION

[0002] This invention relates to an image capturing apparatus capable of picking up a light image of an object by an image pickup device such as CCD (Charge Coupled Device) by photoelectrically converting it into an electric image and storing it in a storage medium such as a hard disk card after applying a specified image processing thereto.

[0003] There have been known electronic cameras as image capturing apparatus. Electronic cameras have, as compared with conventional cameras which record light images on silver halide film, an advantage of picking up images of satisfactory quality by suitably applying an image quality processing to the picked up images according to im age capturing purposes and types of objects since t...

Claims

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