The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 2017
Filed:
Oct. 21, 2013
Mitsubishi Electric Corporation, Tokyo, JP;
Yuka Tsuda, Tokyo, JP;
Nobuhiko Yamagishi, Tokyo, JP;
Toshiyuki Shimizu, Tokyo, JP;
Takashi Hatakenaka, Tokyo, JP;
Junko Shinohara, Tokyo, JP;
Hironobu Yasui, Tokyo, JP;
Tomonori Fukuta, Tokyo, JP;
Isao Otsuka, Tokyo, JP;
Yoshiaki Kato, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An image processing device includes: a calculator that calculates a gray scale histogram for each color component of an image signal; a calculator that calculates, for each color component, a maximum and a minimum of classes having a frequency greater than zero in the gray scale histogram; a determiner that generates, for each color component, a histogram having classes each having an absolute difference value between the frequencies of adjacent classes in the gray scale histogram, and compares the absolute difference values in the histograms with a value to determine, from the presence or absence of an absolute difference value exceeding the value, an image type of the image; a generator that generates a gray scale correction curve from the calculated maximum and minimum for each color component; and a corrector that performs gray scale correction on the image signal using the gray scale correction curve.