Related Experiment Video
Updated: May 25, 2026
09:11
High-resolution Volume Imaging of Neurons by the Use of Fluorescence eXclusion Method and Dedicated Microfluidic Devices
Published on: March 26, 2018
Microgenesis of surface completion in visual objects: evidence for filling-out
Bruno G Breitmeyer1, Jane Jacob
1Department of Psychology, University of Houston, Houston, TX 77204-5022, USA. brunob@uh.edu
Vision Research
|January 17, 2012
Summary
Researchers measured how quickly object surfaces complete visually using metacontrast masking. The surface contrast filling-out speed was estimated at 36.0 degrees per second, offering insights into visual processing.
Area of Science:
- Visual neuroscience
- Perception psychology
Background:
- Surface completion is crucial for object recognition.
- Understanding the temporal dynamics of visual processing is key to object vision.
Purpose of the Study:
- To investigate the temporal dynamics of surface completion in object vision.
- To estimate the speed of the surface contrast filling-out process.
Main Methods:
- Metacontrast masking was employed to study visual perception.
- Varying stimulus onset asynchrony between target objects and masks.
Main Results:
- The estimated speed of the surface filling-out process was 36.0 degrees per second.
- Cortical filling-out speed was calculated as 0.385 m/s, aligning with cortical filling-in and V1 propagation speeds.
Conclusions:
- Surface completion in cortical space can unify filling-in and filling-out phenomena.
- Results inform computational models of object vision and visual processing speeds.
Related Concept Videos
01:21Gestalt Principles of Perception
Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
01:32Pinching-off of Coated Vesicles
Vesicle budding is orchestrated by distinct cytosolic proteins such as adaptor proteins, coat proteins, and GTPases. To initiate vesicle budding, membrane-bending proteins containing crescent-shaped BAR domains bind to the lipid heads in the bilayer and distort the membrane to form a protein-coated vesicle bud. Adaptors proteins such as AP2 for clathrin-coated vesicles can nucleate on the deformed membrane. Finally, coat proteins such as clathrin or COPI and COPII assemble into a coat forming...
01:12Theorems of Pappus and Guldinus: Problem Solving
Pappus and Guldinus's theorems are powerful mathematical principles that are used for finding the surface area and volume of composite shapes. For example, consider a cylindrical storage tank with a conical top. Finding the surface area or volume can be challenging for such complex shapes. These theorems are particularly useful in calculating the volume and surface area of such systems. Here, the cylindrical storage tank with a conical top can be broken down into two simple shapes: a cylinder...