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Control point smoothing method based on preceding deviation

A control point and smoothing technology, which is applied in special data processing applications, instruments, multi-channel program devices, etc., can solve the problems that the dead-reckoning prediction accuracy needs to be improved, and achieve the effect of improving prediction accuracy and good perception effect

Inactive Publication Date: 2008-09-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prediction accuracy of Dead-reckoning under this application still needs to be improved

Method used

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  • Control point smoothing method based on preceding deviation
  • Control point smoothing method based on preceding deviation
  • Control point smoothing method based on preceding deviation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] The specific implementation process of the control point smoothing method based on the previous deviation is as follows.

[0041] 1) Record the movement position of the remote control point in each millisecond within the last N seconds;

[0042] For example, location data within the last 2 seconds may be recorded.

[0043] 2) When network jitter occurs, in order to predict the moving position of the control point, first calculate the current velocity of the control point in the X direction and Y direction, using aveVelocity X and aveVelocity Y To represent; the approximate speed is through the nearest T last The position coordinates at the moment (X last , Y last ) and M milliseconds ago T flag The location coordinates (X flag , Y flag ) to calculate;

[0044] aveVelocit y X = ( X ...

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Abstract

The disclosed dynamic adjust and smooth method for control point based on former deviation improves the Dead-reckoning method by using not only target speed and acceleration, but also former deviation. This invention increases prediction precision, makes up the imperfect effect by network jitter, and shows well perception effect.

Description

technical field [0001] The invention relates to the field of computer-supported collaborative work, in particular to a method for smoothing control points based on previous deviations. Background technique [0002] One of the outstanding achievements of mankind in the 20th century, computer technology has brought human society into the information age. With the continuous deepening of the informationization process, the integration of communication technology, computer and network technology has created a new research field - Computer Supported Cooperative Work CSCW (Computer Supported Cooperative Work). [0003] When co-designers are working together, monitoring the trajectory of remote control points can better help users understand and predict the intentions of other designers. Showing the change process of remote pattern objects is a valuable means to support collaborative work. However, networks often suffer from erratic delays, also known as jitter, which can lead to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00G06F9/46
Inventor 陈纯卜佳俊杨建旭姜波
Owner ZHEJIANG UNIV