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BVisionDedicated for the
Morris water maze test
study of effect of different compounds on spatial orientation and
memory of experimental animals
Video camera
Water poolHidden Platform
Animal (rat)
BV
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BVision
Data
Tracking System Analyzing Tools
Acquisition
Management
Visualization
Analysis
Configuration parameters
BV
Automatic creation of the video archive
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BV
• Program correction of the video path in the framegrabber.
• Minimizing load of the processor.
• Fast signal proceeding (up to 25 frames/s
• Displaying zones boundaries
Live Video
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Data structure and storage Flexible database management system.
Tracks and Experiments Stored in the Database
BV
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Arena and zones definition Automatical detection of borders of the pool and other
analyzed zones (for example, platform)
Result of Zones Detection
Restoration of the Platform Position
BV
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Object Detection Algorithm
Формальный нейрон
Framegrabber Input video signal
Program correction of the
video path
Differentiation of all the found
objects by size
Corrected video signal
Detected animal
1
Differentiation of the residual objects
according to physical reasons
2
BV
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Tracking process
BV
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Parameters
BV
• escape latency,
• accounting for time of active swimming only (with speed lower than selected threshold),
• trajectory length,
• speed,
• index of “pasive” swimming” (to characte-rize decrease of animals’ mobility),
• time in zone of interest (ZOI),
• % of tracks failed to find the platform,
• straightness index (deviation from the direct path to platform),
• cumulative and reverse cumulative distances to platform,
• angle characteristics of movement relative platform,
• Whishaw “alley” index, etc.
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Analysis of a Single Track
BV
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Zones Definitions for Analysis
BV
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Main Analysis Window
BV
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Results Visualization
BV