Inventors:
Eugene D. Savoye - Concord MA
Allen M. Waxman - Newton MA
Robert K. Reich - Chelmsford MA
Barry E. Burke - Lexington MA
James A. Gregory - Sudbury MA
William H. McGonagle - Dunstable MA
Andrew H. Loomis - Chelmsford MA
Bernard B. Kosicki - Acton MA
Robert W. Mountain - Newburyport MA
Alan N. Gove - Brookline MA
David A. Fay - Somerville MA
James E. Carrick - Natick MA
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
H04N 5225
Abstract:
An imaging system is provided for imaging a scene to produce a sequence of image frames of the scene at a frame rate, R, of at least about 25 image frames per second. The system includes an optical input port, a charge-coupled imaging device, an analog signal processor, and an analog-to-digital processor (A/D). The A/D digitizes the amplified pixel signal to produce a digital image signal formatted as a sequence of image frames each of a plurality of digital pixel values and having a dynamic range of digital pixel values represented by a number of digital bits, B, where B is greater than 8. A digital image processor is provided for processing digital pixel values in the sequence of image frames to produce an output image frame sequence at the frame rate, R, representative of the imaged scene, with a latency of no more than about 1/R and a dynamic range of image frame pixel values represented by a number of digital bits, D, where D is less than B. The output image frame sequence is characterized by noise-limited resolution of at least a minimum number, N. sub. M, of line pairs per millimeter, referred to the charge-coupled imaging device pixel array, in an imaged scene as a function of illuminance of the input light impinging the charge-coupled imaging device pixels.
