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Motion-vector-based comparison of moving objects

A motion vector and motion technology, applied in the field of motion devices, can solve the problems of difficult space-time alignment, imprecise alignment, etc.

Inactive Publication Date: 2013-11-20
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Given two different representations (from different subjects), spatio-temporal alignment based on existing frames can be difficult, sometimes resulting in imprecise alignment
[0008] US7602301 and US6567536 disclose solutions for on-body sensor based motion analysis, but these solutions require additional markers and sensors applied to the body

Method used

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  • Motion-vector-based comparison of moving objects
  • Motion-vector-based comparison of moving objects
  • Motion-vector-based comparison of moving objects

Examples

Experimental program
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Embodiment Construction

[0023] The invention is now described on the basis of an embodiment in which the motion of a player or other object in a video sequence (eg a sports video) is quantitatively analyzed. More specifically, video analysis is enhanced to extract motion data. Frame alignment can be achieved even with different representations (by different subjects) of different executions of motion (eg different speeds and / or directions of motion).

[0024] figure 1 A schematic diagram showing a process flow or process chain according to a first embodiment, wherein motion vectors are calculated at each video frame using motion estimation or other techniques that can find correspondences between video frames. Motion vectors calculated at each video frame can be used to better compare motion. In a step or stage 110, motion vectors are calculated for frames of at least two video sequences. The calculated motion vectors are then used in step or stage 120 to generate and interpolate intermediate fram...

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PUM

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Abstract

The present invention proposes to analyze movements of objects in video sequences (e.g. sport videos), by performing motion estimation to determine motion vectors at each frame. With the calculated motion vectors, the movements of the object(s) (e.g. athlete(s)) can be quantitatively measured. Based on this, movements in two videos can be compared at each individual frame of the video sequence. Different approaches (e.g., color coding) can be used to visualize and compare the movements. With motion estimation, intermediate frames can also be inserted to enable better movement comparison in two given videos.

Description

technical field [0001] The present invention relates to devices and methods and systems for comparing motion in video sequences. Background technique [0002] Various enhancement techniques have been used in sports video broadcasts. Such enhancements may provide viewers with a better viewing experience. In racing, for example, video can be enhanced with graphics that identify the driver of the car and display information such as the speed of the car (obtained, for example, through a global positioning system (GPS)). A first example is a video sequence of a football match, in which a virtual offside line can be inserted, which allows the viewer to see exactly when and how a foul was committed. Another example is a video sequence of golf where yardage points, danger zones, banked fairways, and false fronts can be identified and added to the video. [0003] US7042493 and WO01 / 78050A2 disclose motion analysis systems for generating stroboscope sequences of sporting events fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/262H04N5/14G06T7/20H04N21/2343
CPCH04N5/44591A63B2220/806H04N7/014A63B24/0003H04N7/013A63B69/36H04N5/145H04N5/2625H04N21/47H04N21/4316G06T7/20H04N5/262H04N21/2343A63B2220/80
Inventor C·香A·M·G·皮特斯
Owner KONINK PHILIPS ELECTRONICS NV