Edge Tracking Length

Edge Tracking Length is a geometric measure of the distance over which a boundary, interface, or moving biological feature is followed in experimental data. In bioengineering, it is typically determined by detecting an edge in microscopy or sensor images, linking its position across pixels or successive frames, and summing the resulting boundary segments or trajectory. This measurement can quantify cell migration, tissue deformation, vessel geometry, wound closure, and flow-driven interfaces in microfluidic systems. Reliable edge tracking supports image-based modeling and comparison of biological dynamics, while changes in tracking length can reveal altered motility, growth, remodeling, or mechanical responses.

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Education

JoVE Science Education - Psychology

Multiple Object Tracking

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2023

Source: Laboratory of Jonathan Flombaum—Johns Hopkins University In a staggeringly complex and engaging world, it is crucial to selectively process some stimuli at the expense of others. Experimental psychologists call this ability attention. Specifically, visual attention refers to the ability to selectively process aspects of a visual scene. Many paradigms used to study visual attention involve brief, punctuated, and repeated trials. However, everyday situations often place sustained demands...

Research

JoVE Journal - Neuroscience

C. elegans Tracking and Behavioral Measurement

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Cited by 14 •

2012

We have developed a video-rate tracking microscope system that can record and quantify C. elegans behavior at high resolution and high speeds. We have also developed computational methods to reduce the dimensionality of the worm images to a fundamental set of measurements that completely describe the shape of the worm.

Flow Visualization in a Water Tunnel: Observing the Leading-edge Vortex Over a Delta Wing

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2023

Source: Jose Roberto Moreto, Gustaaf Jacobs and Xiaofeng Liu, Department of Aerospace Engineering, San Diego State University, San Diego, California The delta wing, shown in Figure 1D, is a popular design in high-speed airplanes due to its superb performance in transonic and supersonic flight regimes. This type of wing has a small aspect ratio and high sweep angle, which reduces drag at high subsonic, transonic and supersonic flight regimes. The aspect ratio is defined as the wing span divided...

Eye Tracking in Cognitive Experiments

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2023

Eye tracking as the name suggests involves tracking of eye-movements. It is a non-invasive, sensitive tool that quantifies and measures eye-movements to describe an individuals' cognitive state. An eye-movement between two fixation points is called a saccade, which is one of the fastest motor movements in our body. By observing the profiles of these eye movements, scientists can better understand neural deficits in patients with cognitive impairments. In this video, we will first look at an...

Research

JoVE Journal - Medicine
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Eye Tracking Young Children with Autism

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Cited by 93 •

2012

Eye tracking has long been used to study gaze patterns in typically-developing individuals, but recent technological advancements have made its use with clinical populations, including autism, more feasible. While eye-tracking young children with autism can offer insight into early symptom manifestations, it involves methodological challenges. Suggestions for best practices are provided.

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