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:
Jan. 31, 1995
Filed:
Jul. 14, 1993
Kiyosuke Suzuki, Saitama, JP;
Sony Corporation, Tokyo, JP;
Abstract
A quantizing circuit is applied to a film scanner which is adapted to read image data from a negative or positive film, and the resultant film scanner is simple in arrangement, and is advantageous in that deterioration in picture quality of the output image can be prevented, and the adjustment operation for gamma correction can be simplified. In such a quantizing circuit, an analog-to-digital conversion circuit converts an input signal into a first digital signal D1 having a predetermined first bit length, and a digital signal processing circuit converts the first digital signal into a second digital signal whose bit length is smaller in the number of bits than the first bit length. In this case, the first digital signal is converted into the second digital signal based on detected maximum, minimum and average values of the second digital signal during a preview scan.