Video camera with white balance control having the function of inhibiting auto while balance control under a special light source or of a special object
First Claim
1. A video camera, comprising:
- a) image pickup means for forming plural color signals according to the light from an object;
b) regulation means for relative regulation of the gains of said plural color signals thereby regulating the white balance thereof;
c) control signal forming means for forming, according to color temperature information, a control signal for controlling said regulation means;
d) discrimination means for discriminating, whether said control signal is within a predetermined range; and
e) termination means for stopping the function of said control signal forming means in response to the result of discrimination by said discrimination means, and for subsequently inhibiting the function of said control signal forming means irrespective of said control signal.
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Accused Products
Abstract
In a video camera capable of regulating the white balance by relative regulation of the gains of plural color signals obtained from the light coming from an object, a control signal for controlling the white balance regulating operation is formed according to color temperature information, and the formation of the control signal is suspended according to the result of discrimination whether the control signal is within a predetermined range, whereby the time required for regulating operation is shortened. Also in case the object color is identified to contain a deviation to a particular color, the control signal is replaced by another value. In this manner the white balance control utilizing the image signal is enabled ever under a special light source for a special object.
57 Citations
20 Claims
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1. A video camera, comprising:
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a) image pickup means for forming plural color signals according to the light from an object; b) regulation means for relative regulation of the gains of said plural color signals thereby regulating the white balance thereof; c) control signal forming means for forming, according to color temperature information, a control signal for controlling said regulation means; d) discrimination means for discriminating, whether said control signal is within a predetermined range; and e) termination means for stopping the function of said control signal forming means in response to the result of discrimination by said discrimination means, and for subsequently inhibiting the function of said control signal forming means irrespective of said control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A video camera, comprising:
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a) image pickup means for forming plural color signals according to the light from an object; b) plural regulation means for respectively regulating the gains of said plural color signals; c) control signal forming means for forming plural control signals for controlling said plural regulation means, utilizing said plural color signals; d) discrimination means for discriminating whether the combination of said plural control signals belong to a predetermined group of combinations; and e) control means for substituting the values of said plural control signals with other values and stopping the function of said control signal forming means, in response to the result of discrimination by said discrimination means, said control means subsequently inhibiting the function of said control signal forming means irrespective of said control signal. - View Dependent Claims (11, 12)
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13. A video camera, comprising:
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a) image pickup means for forming plural color signals according to the light from an object; b) regulation means for relative regulation of the gains of said plural color signals thereby regulating the white balance thereof; c) control signal forming means for forming, according to color temperature information, a control signal for controlling said regulation means; d) discrimination means for detecting that the color of said object has a deviation to a particular color; and e) substitution means for substituting the value of the control signal formed by said forming means with another value, in response to the result of detection by said detection means, and for subsequently maintaining the another value irrespective of said control signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification