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Method using pixel change to control starting and stopping of recording function of recording device

A technology of pixel change and function, applied in the field of image communication, can solve the problems of limited sensor range and high energy consumption when turned on for a long time, and achieve the effect of reducing hardware cost

Inactive Publication Date: 2013-09-18
WINGTECH COMM
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the range of action of these sensors is usually relatively limited, and the energy consumption is relatively large when turned on for a long time

Method used

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  • Method using pixel change to control starting and stopping of recording function of recording device

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Embodiment Construction

[0015] The basic principle of the video recording equipment is to image the external image in the equipment through the lens, and use the photosensitive module to convert the optical image into an electrical signal, and then transmit and store it after processing.

[0016] When we shoot an object, the light reflected on the object is collected by the camera lens to focus on the light-receiving surface of the imaging device (such as the target surface of the imaging tube), and then the light is converted into electrical energy through the imaging device, which is obtained "Video Signal". The photoelectric signal is very weak and needs to be amplified by a pre-amplification circuit, and then processed and adjusted by various circuits. The final standard signal can be sent to a recording medium such as a hard disk or tape for recording, or propagated through a communication system or sent to monitoring displayed on the device. In the prior art, the display of the standard signal...

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Abstract

The invention discloses a method using pixel change to control starting and stopping of a recording function of a recording device, relates to image communication, and especially relates to image signal processing. The method comprises the steps of sampling shot images at a certain time interval; comparing the data of the same pixel of first and second sampled images; collecting comparison results of all valid pixels to judge whether an object moves in a recording range; and starting or stopping the recording function. According to the method, the recording device automatically controls starting and stopping of the recording function; the hardware cost is reduced; the defects of the prior art are overcome; and the method especially has a realistic significance for some portable recording devices.

Description

technical field [0001] The invention relates to image communication, in particular to image signal processing. Background technique [0002] After the recording device is turned on, the camera function can usually be activated at any time. After activation, a real-time image of the outside world can be displayed on its monitor or viewfinder. Due to the limited storage space, the recording function is usually activated or deactivated by the user's manual operation. [0003] In some occasions, it is required that the video recording device can automatically start the recording function when it detects that an object is moving, and record the image in the storage medium. In order to realize this function, specific sensors are usually used in the prior art to control the start and stop of the recording function. However, the range of action of these sensors is usually relatively limited, and the energy consumption is relatively large when turned on for a long time. Contents...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04N5/76
Inventor 吴亮
Owner WINGTECH COMM
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