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Automatic aperture correction method

A technology of automatic aperture and correction method, which is applied in the field of image communication, can solve the problems of low reliability of correction results, not very wide applicability, and poor application of lenses, etc., to achieve shortened correction time, short correction time and high reliability high effect

Inactive Publication Date: 2014-12-10
TIANJIN TIANDY DIGITAL TECH
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  • Abstract
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Problems solved by technology

[0004] Cameras and other equipment with automatic aperture lenses, when the automatic aperture correction is performed before leaving the factory, the correction time is long, and the reliability of the correction results is not high, and the applicability is not very wide, and it is not suitable for a wide variety of lenses on the market. , at the same time, more parameters need to be set when performing aperture correction, which affects work efficiency

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Embodiment Construction

[0021] The automatic aperture correction method of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0022] Such as figure 1 As shown, the present invention provides an automatic aperture correction method.

[0023] The technical scheme that the present invention takes for solving this problem is:

[0024] The automatic aperture correction method of the present invention comprises:

[0025] Step i: first apply a 0v voltage to both ends of the auto-iris driving part, fully open the auto-iris, and close the related brightness adjustment after it stabilizes;

[0026] Step ii: At the two ends of the automatic iris driving part, gradually apply the voltage from P0 = 0v voltage, if the light does not change, then increase the driving value by P1, P2, P3...Pn until the light is obviously darkened, so as to obtain the iris stable upper limit.

[0027] Step iii: Apply the maximum voltage supported by the aperture ...

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Abstract

The invention discloses an automatic aperture correction method. A value for keeping an automatic aperture stable is a numerical value in a certain range. The method comprises the following steps: finding out an approximate upper limit value and a lower limit value in the range; obtaining a proper value for serving as a value in the stable state of the aperture in order to allow the automatic aperture to work normally. Meanwhile, the numerical value is obtained through accumulation of times and time, thereby shortening the correction time, and increasing the correction accuracy. The algorithm is suitable for most commercially-available lenses comprising automatic apertures; moreover, the method is easy and convenient to use, the correction time is short, and the correction result is high in reliability. Meanwhile, the effect in a regulating process is remarkable, and hardware problems such as failure in closing the apertures existing in certain lenses can be found.

Description

technical field [0001] The invention relates to image communication technology, in particular to an automatic aperture correction method. Background technique [0002] Cameras are usually used in situations where the illumination changes in a large range. Therefore, in order to ensure that the camera can correctly expose and form images, the aperture of the lens must be adjusted at any time to ensure that the TV image does not appear to be clipped, otherwise the bright part of the image may lose gray. The degree of gradation, or the picture is dark and noisy due to the reduction of the amount of light. However, once the camera position is fixed, it is very inconvenient to manually adjust the aperture every day. Only when the camera is equipped with an automatic aperture function (providing an interface for driving the automatic aperture lens), can the camera output The video image signal is automatically maintained at the standard state. [0003] When the automatic apertur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235
Inventor 戴林石行
Owner TIANJIN TIANDY DIGITAL TECH
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