Video camera and image enhancing apparatus

Details Video camera and image enhancing apparatus Video camera and image enhancing apparatus

1996-12-06

1999-06-15

Garber, Wendy

Television

Camera, system and detail

Combined image signal generator and general image signal...

348252, 348625, H04N 968, H04N 5208, H04N 521

Patent

active

059127023

ABSTRACT:
A video camera and an image enhancing apparatus which can add details without deteriorating an S/N ratio near the black level are provided. The video camera is constructed by: an image pickup device for photographing an object and generating a video signal; a signal level detecting circuit for detecting a signal level of DC components of the video signal; a detail signal forming circuit for forming a detail signal to correct an outline of an image which is expressed by the video signal by extracting partial frequency components in the video signal from the video signal; a control unit for controlling the detail signal forming circuit on the basis of an output of the signal level detecting circuit in a manner such that as a signal level of the DC components is low, frequency of the detail signal to be formed by the detail signal forming circuit becomes lower; and a mixing circuit for mixing the detail signal to the video signal.

REFERENCES:
patent: 4876599 (1989-10-01), Kihara
patent: 5103299 (1992-04-01), Asaida
patent: 5255081 (1993-10-01), Miyamoto et al.
patent: 5349381 (1994-09-01), Murayama et al.
patent: 5661522 (1997-08-01), Tomizuka

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