Imaging method for a wide dynamic range and an imaging device fo

Details Imaging method for a wide dynamic range and an imaging device fo Imaging method for a wide dynamic range and an imaging device fo

1993-10-25

1995-10-03

Mancuso, Joseph

Television

Camera, system and detail

Combined image signal generator and general image signal...

348221, 348222, 348230, 348362, H04N 5235, H04N 557

Patent

active

054556210

ABSTRACT:
A method for producing an image with a wide dynamic range using an imaging element in which periods for accumulating charges can be varied in one field is disclosed. The method includes the steps of: reading a charge stored in the imaging element in a first period of the field as a first signal; reading a charge stored in the imaging element in a second period of the field as a second signal, the second period being different from the first period; applying a first weight to the first signal in accordance with the level of the first signal; applying a second weight to the second signal in accordance with the level of the second signal; producing a synthesized signal by synthesizing the weighted first signal and the weighted second signal; and compressing the level of the synthesized signal to a predetermined standard level.

REFERENCES:
patent: 5089890 (1992-02-01), Takayama
patent: 5138458 (1992-08-01), Nagasaki et al.
patent: 5162914 (1992-11-01), Takahashi et al.
patent: 5264944 (1993-11-01), Takemura
Otsubo, The Journal of the Institute of Television Engineers of Japan, vol. 45, No. 9, 1991, pp. 1060-1066.
Nakayama et al., The Journal of the Institute of Television Engineers of Japan, vol. 45, No. 9, 1991, pp. 1080-1088.

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