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:
May. 03, 1994
Filed:
Jun. 10, 1992
Yusheng T Tsai, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A method and apparatus is disclosed for extending the dynamic range of an electronic imaging system to permit the use of lower cost, lower resolution devices to digitize and process the analog image signal generated by an electronic image sensor. Multiple images captured at different exposure levels are stored in a framestore. An electronic data processing unit then compares the pixels from the image captured at a normal exposure level to preselected exposure ranges to determine if the pixel is underexposed or overexposed. If the pixel is underexposed, the pixel is replaced with a corresponding pixel from an image captured at a higher exposure level. If the pixel is overexposed, the pixel is replaced with a corresponding pixel from an image captured at a lower exposure level. A two level optimization routine is employed, wherein median exposure valves are used to compensate for subject motion.