Electronic still camera for generating long time exposure by add

Details Electronic still camera for generating long time exposure by add Electronic still camera for generating long time exposure by add

1983-08-16

1986-09-30

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 41, 358211, 358212, 358221, 358909, H04N 9077, H04N 5228, H04N 530, H04N 904

Patent

active

046149660

ABSTRACT:
An image recording apparatus includes a solid state image pickup; an A/D converter for converting a one-frame analog image signal from the solid-state image pickup to a one-frame digital image signal; and a recorder coupled to the A/D converter for accumulating a plurality of one-frame digital image signals which are intermittently and successively picked up by the image pickup and output from the A/D converter to form a single one-frame digital image signal, and for recording the single one-frame digital image signal. The recorder includes a memory for storing the single one-frame digital image signal. An adder is provided for adding the one-frame digital image signal produced from the A/D converter and a single one-frame digital signal produced from the memory, and for writing the addition results into the memory. A detector is coupled to an output of the adder for detecting a minimum value of the single one-frame digital image signal, and a subtracter is provided for subtracting the minimum value from the single one-frame digital image signal read out from the memory.

REFERENCES:
patent: 4131919 (1978-12-01), Lloyd et al.
patent: 4415937 (1983-11-01), Nishizawa et al.
patent: 4503466 (1985-03-01), Ryan
Sapirstein, R. L., "Improving Low-Illumination Video", NASA Tech. Briefs, Spring 1979, p. 18.

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