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Mobile detection method and device

A motion detection device and technology for motion detection, which can be applied to parts and electrical components of TVs and color TVs, and can solve problems such as high cost and complicated motion compensation methods

Inactive Publication Date: 2011-10-12
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, motion compensation is complex and costly, and is only suitable for high-end applications

Method used

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  • Mobile detection method and device
  • Mobile detection method and device
  • Mobile detection method and device

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Embodiment Construction

[0046] Please refer to figure 2 , figure 2 It is a schematic diagram of a movement detection device 20 of the present invention. The movement detection device 20 is used in a video processing system to detect the movement degree of a current picture, and includes input terminals 21 and 22, a time difference calculation unit 23, a space difference calculation unit 24, and a displacement estimation unit 25. The input terminals 21 and 22 are used to receive a previous frame f(t-1) and a current frame f(t), respectively. The previous picture f(t-1) is preferably the previous picture of the current picture f(t), but in other embodiments, it may also be one of the previous pictures of the current picture f(t) , Not limited to this. The time difference calculation unit 23 is coupled to the input terminals 21 and 22, and is used to calculate the difference between the pixel value of a target pixel in the current frame f(t) and the previous frame f(t-1) to determine a time pixel valu...

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Abstract

The invention relates to a mobile detection method comprising the following steps of: receiving a previous image and a current image; computing the pixel value difference of a target pixel in the current image and the previous image to judge a time pixel value difference; respectively computing the pixel value difference of the target pixel and surrounding pixels of the target pixel in the previous image and the current image to judge a space pixel value difference; and dividing the space pixel value difference by the time pixel value difference to judge a displacement value of the target pixel.

Description

Technical field [0001] The present invention relates to a movement detection method and device, in particular to a movement detection method and device for estimating the degree of movement of a target pixel through temporal pixel value differences and spatial pixel value differences. Background technique [0002] Video may produce noise in various situations such as capture, recording, and transmission, which will affect the effect of its subsequent processing. Therefore, noise cancellation is a very important task in video processing. Generally speaking, methods for eliminating noise are divided into spatial noise reduction (Spatial Noise Reduction) and temporal noise reduction (Temporal Noise Reduction). On a still picture, purely using correlation in the time domain to filter out noise will retain more image details than using spatial image characteristics; on the contrary, on a moving picture, use correlation in the time domain To filter out the noise, it will cause an aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/14H04N5/21
Inventor 李东信蒋俊成
Owner NOVATEK MICROELECTRONICS CORP
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