Device for correcting the tone of color pictures recorded by a v

Details Device for correcting the tone of color pictures recorded by a v Device for correcting the tone of color pictures recorded by a v

1996-08-09

1999-07-20

Ho, Tuan

Television

Camera, system and detail

Combined image signal generator and general image signal...

348 45, 348649, H04N 973

Patent

active

059262133

ABSTRACT:
The invention relates to a device for correcting the tone of color pictures recorded by a video camera, in particular an endoscope camera. A control device, which may also be part of a digital video camera, comprises a memory for storing a table which indicates a characteristic adjusting curve for tone correction values. The control device may further comprise an interface for inputting one or more characteristic adjusting curves according to the field of application of the device according to the invention. A simple rotary transducer which is connected via a lead to a control device serves as the input medium for the tone correction. After activating an automatic white balancing by way of a key connected to the control device, the correction values lies at the white point. The white point is always located on the adjusting curve and serves as a starting point. On operation of the rotary transducer, the tone correction is activated, and the control device reads out the value of the characteristic adjusting curve corresponding to the position of the rotary transducer from the look-up table stored in the memory. The point located on the adjusting curve after carrying out the correction remains also after switching off the control device an is only set to zero on renewed white balancing.

REFERENCES:
patent: 4951134 (1990-08-01), Nakasima et al.
patent: 5111281 (1992-05-01), Sekiguchi
patent: 5574513 (1996-11-01), Topper
patent: 5677741 (1997-10-01), Yui

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