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Method for rapidly predicting frame space of aerophotographic traffic video

An inter-frame prediction and traffic technology, which is applied in the fields of video coding and traffic monitoring, can solve problems such as high computational complexity and moving object detection, and achieve the effect of reducing the amount of calculation, keeping it basically unchanged, and reducing the time-consuming effect of inter-frame prediction

Inactive Publication Date: 2010-01-06
BEIHANG UNIV
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Problems solved by technology

This compression method can obtain better image quality than the video compression standard under the same compression ratio, but its disadvantage is that moving object detection is required before compression, and the computational complexity is high

Method used

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  • Method for rapidly predicting frame space of aerophotographic traffic video
  • Method for rapidly predicting frame space of aerophotographic traffic video
  • Method for rapidly predicting frame space of aerophotographic traffic video

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Embodiment Construction

[0031] Such as figure 1 Shown, the present invention comprises the steps:

[0032] Step 100, collecting image frame sequences, judging whether the current frame to be processed is the first frame of the image frame sequence, if it is the first frame, execute step 200, otherwise, execute step 300;

[0033] Step 200, do not perform region segmentation, use traditional intra-frame coding for the current frame, and complete one-frame coding;

[0034] Step 300, determine the search starting point of global motion estimation, and perform global motion estimation on the current frame, and obtain the global motion vector of the current frame and the best matching time frame difference;

[0035] Step 400, by comparing the best matching time frame difference with the preset threshold, it is judged whether a scene switch occurs in the current frame, if a scene switch occurs, perform step 200, otherwise, perform step 500;

[0036] Step 500, segment the frame without scene switching into...

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Abstract

Aerial photography communication video fast inter-frame prediction method comprises: the step, collecting an image frame sequence, judging whether the frame to be processed currently is a first frame; if yes, performing the step 200; or, performing the step 300; the step 200, using an inter-frame code without area division; the step 300, determining a search start point of global motion estimation, and undergoing global motion estimation for current frame, obtaining global motion vector and the current frame and time frame difference of optimum matching; the step 400, comparing the time frame difference of optimum matching with a predetermined threshold value, judging whether the current frame has scene switch; if yes, performing the step 200, or, performing the step 500; the step 500, undergoing prediction coding for the frame without scene switch, cutting the frame into a background area and a motion area; the step 600, undergoing motion estimation for the current frame with macro-block as an unit, and undergoing inter-frame prediction coding based on division of background and motion areas. The invention reduces inter-frame prediction time consumption and remains quality of reconstructed image and code rate unchanged substantially.

Description

technical field [0001] The invention relates to a video coding method suitable for space-based traffic monitoring, in particular to a fast inter-frame prediction method based on background and motion region segmentation, belonging to the fields of traffic monitoring and video coding. Background technique [0002] With the intensification of urban traffic congestion in recent years, traditional road-based traffic monitoring equipment has gradually exposed its inherent shortcomings such as narrow monitoring range and lack of control over macro information. [0003] In response to these defects, the United States and some developed countries in Europe (Spain, France, etc.) began to explore and study the aerial surveillance technology of road traffic situation in the 1990s. This technology uses the air-based platform to carry video sensors to realize ground traffic situation monitoring. It has the advantages of large monitoring range and flexible maneuverability. It can obtain t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/32G06T7/20G08G1/01H04N19/57H04N19/593
Inventor 罗喜伶施健勇陈煦阳
Owner BEIHANG UNIV
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