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:
Jul. 05, 2005
Filed:
Dec. 06, 2002
Applicant:
Richard Lehman, Nashua, NH (US);
Inventor:
Richard Lehman, Nashua, NH (US);
Assignee:
Howtek Devices Corporation, Hudson, NH (US);
Primary Examiner:
Int. Cl.
CPC ...
H04N001/40 ; H04N001/04 ; H04N001/38 ; H03M001/12 ;
U.S. Cl.
CPC ...
Abstract
A digitizer having a dual exposure technique is combined with an associated LUT for each exposure. Each LUT may have a transfer function including a logarithmic operator resulting in a digitized image with improved photometric resolution and increased dynamic range. A digitizer utilizing multiple exposures at approximately equal exposure time intervals provides a noise reduction for lower optical density portions of the data medium further contributing to increased dynamic range. Associated methods are also provided.