Day and night mode switching method of CCD camera

A mode conversion and camera technology, applied in photography, image communication, color TV parts, etc., can solve the problem of uncontrollable sensitivity and achieve the effect of making up for the blank that cannot adjust the gain value

Inactive Publication Date: 2014-07-30
SHENZHEN HUANGHE DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, using a photoresistor to control the day and night conversion, its sensitivity is uncontrollable

Method used

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  • Day and night mode switching method of CCD camera
  • Day and night mode switching method of CCD camera
  • Day and night mode switching method of CCD camera

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Embodiment Construction

[0033] Such as figure 1 As shown, the present invention discloses a method for switching between day and night modes of a CCD camera, which includes the following steps: In step S1, the real-time gain value and the real-time shutter speed value are read. In step S2, it is judged whether the gain value in step S1 is greater than the preset threshold value, and if it is greater than the preset threshold value, then step S3 is executed; otherwise, step S1 is executed. In step S3, control the CCD camera to switch to night mode. In step S4, when the infrared lamp is turned on, read the real-time shutter speed value and the real-time gain value again, and use the shutter speed value read at this time as a reference shutter speed value, and use the gain value read at this time as a reference gain value. In step S5, it is judged whether the reference gain value is greater than the set value, if it is greater than the set value, then execute the step of judging the gain value, otherw...

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Abstract

The invention provides a method for switching between day and night modes of a CCD camera. The beneficial effect of the present invention is that the present invention controls the day-night conversion by replacing the photoresistor with a million CCD video detection technology inside the program. The sensor of the camera itself can transmit the gain value to the back end, that is, the program, and use this gain value to judge the external brightness information. When the brightness is high, the gain value is small, and when the brightness is low, the gain value is large. Therefore, when the light is dark, it needs to be increased. Gain to increase brightness. Conversely, when the gain value is large, it means that the light is very dark, thus controlling the day and night conversion mode of the camera. This makes up for the gap that the gain value cannot be adjusted by the photoresistor and avoids some misjudgments of the photoresistor and repeated switching due to brightness changes caused by turning on and off the infrared lamp.

Description

technical field [0001] The invention relates to a method for switching camera working modes, in particular to a method for switching day and night modes of a CCD camera. Background technique [0002] At present, most infrared cameras use photoresistors to control the opening and closing of infrared lights. Photoresistors are very sensitive to light, and their resistance varies greatly under different light intensity. Infrared cameras use photoresistors as infrared light switches. For example, when the light is strong, the resistance of the photoresistor is very small. For a control circuit, it is turned on. Using the turn-on performance to control a switch to turn it off, the infrared lamp does not work; and vice versa. This is exactly what makes the IR lights off during the day and on at night. [0003] Since the photoresistor is an electronic component, its service life is limited. When it works for a long time, its sensitivity will also decrease, and under the influence ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232G03B15/05
Inventor 周波陈永刚
Owner SHENZHEN HUANGHE DIGITAL TECH
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