1
Theodore A Camus, Thomas A Chmielewski Jr: Image subtraction to remove ambient illumination. Sensar, Buchanan Ingersoll P C, February 1, 2000: US06021210 (68 worldwide citation)

In a method of image subtraction a series of frames of a subject are taken using a video camera The subject is illuminated in a manner so that illumination is alternately on then off for successive fields within the image frame. A single frame is grabbed and an absolute difference between the odd fi ...


2
Camus Theodore A, Chmielewski Thomas A Jr: Image subtraction to remove ambient illumination. Sensar, ALSTADT Lynn J, June 10, 1999: WO/1999/029102

In a method of image subtraction a series of frames of a subject are taken using a video camera. The subject is illuminated in a manner so that illumination is alternately on, then off for successive fields within the image frame. A single frame is grabbed and an absolute difference between the odd ...



Click the thumbnails below to visualize the patent trend.