Television – Camera – system and detail – With object or scene illumination
Reexamination Certificate
2005-04-26
2005-04-26
Moe, Aung (Department: 2612)
Television
Camera, system and detail
With object or scene illumination
C348S222100
Reexamination Certificate
active
06885405
ABSTRACT:
An intelligent flash system for a digital camera having components including an image optical pickup, an interface circuit, a flash unit and a processor. Upon activation of the camera, ambient lighting conditions are evaluated and if flash energy is required, a first low energy pre-flash is radiated, the reflected light received by the optical pickup having a multiplicity of pixels, and the output of the pixels converted to image intensity data by the interface circuit. The processor samples the image intensity data, weighing the center image area more heavily, and creates a histogram plot of quantity of pixels v.s. intensity, and separates the plot into a bar graph from which a determination of exposure is obtained. The histogram is then used to calculate a multiplicative scaling factor used to multiply the first flash energy to an estimate of a flash energy for correct exposure. Conditions of extreme over and under exposure result in the activation of a second flash at an adjusted energy level. The image data of the second flash is then analyzed and the exposure compared with the result of the first flash. A final determination of flash energy is then made based upon the results.
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Mehra Sumat
Steinberg Eran
Vasudev Hari
FlashPoint Technology Inc.
Moe Aung
Sawyer Law Group LLP
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