B V i s i o n

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)

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BVision

Data

Tracking System Analyzing Tools

Acquisition

Management

Visualization

Analysis

Configuration parameters

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Automatic creation of the video archive

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• 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

Data structure and storage Flexible database management system.

Tracks and Experiments Stored in the Database

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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

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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

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Tracking process

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Parameters

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• 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.

Analysis of a Single Track

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Zones Definitions for Analysis

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Main Analysis Window

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Results Visualization

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