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:
Feb. 17, 1998
Filed:
Jan. 23, 1996
Keiju Okabayashi, Kawasaki, JP;
Yusuke Yasukawa, Kawasaki, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
An image processing apparatus is provided which is capable of a high-speed process for obtaining a projection histogram. A digitizing unit subjects a video signal, obtained by acquiring an image of a target mark with a camera, to horizontal scanning and slicing to obtain a binary signal. A window signal output unit, coupled to the digitizing unit, outputs a window signal in accordance with a preset window area. An in-window signal output unit is connected to the outputs of the digital unit and the window signal output unit to perform a logical AND operation on the binary signal and the window signal and outputs an in-window binary signal. A histogram creating unit is coupled to the output of the in-window signal output unit to create a projection histogram by successively counting the high- and low-level states of the in-window binary signal generated as the horizontal scanning progresses. During a horizontal scanning (image scanning) corresponding to one screen, digitization of the video signal, window setting, and generation of the in-window binary signal are carried out, and further a histogram is created based on the in-window binary signal. Namely, scanning the video signal (image) once is sufficient to create a projection histogram.