Object Size
Object Size - Related Videos
14:38
Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Cited by 11 •
2012
We describe a novel methodology for creating naturalistic 3-D objects and object categories with precisely defined feature variations. We use simulations of the biological processes of morphogenesis and phylogenesis to create novel, naturalistic virtual 3-D objects and object categories that can then be rendered as visual images or haptic objects.
10:14
Object Substitution Masking
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Visual masking is a term used by perceptual scientists to refer to a wide range of phenomena in which in an image is presented but not perceived by an observer because of the presentation of a second image. There are several different kinds of masking, many of them relatively intuitive and unsurprising. But one surprising and important type of masking is called Object Substitution Masking. It has been a focus of research in vision...
05:55
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...
10:29
Studying Dynamic Processes of Nano-sized Objects in Liquid using Scanning Transmission Electron Microscopy
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Cited by 7 •
2017
This protocol describes the operation of a liquid flow specimen holder for scanning transmission electron microscopy of AuNPs in water, as used for the observation of nanoscale dynamic processes.
01:24
Communication Objectives
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2024
Communication objectives are crucial strategic goals in marketing, serving as the backbone for promotional activities. Clear communication objectives help marketers ensure that each piece of communication serves a specific purpose, enhancing the overall impact and efficiency of their marketing efforts. Communication objectives should be SMART: specific, measurable, achievable, relevant, and time-bound. They should align with marketing goals and support brand positioning, ensuring promotional...
FAQs
The relevant dimension depends on the geometry being studied and the physical question being asked. Length can describe a linear extent, diameter can characterize a roughly circular boundary, area can represent a surface, and volume can describe three-dimensional extent. Selecting the appropriate dimension allows scientists to build a meaningful geometric model rather than treating every object as one-dimensional.
Resolution determines whether an instrument can distinguish the object's boundaries clearly enough to report a meaningful dimension. Rulers, microscopes, and imaging systems provide different ways to resolve those boundaries, so the apparent size can depend on the measurement system. This consideration becomes especially important when examining very small objects or features that are difficult to separate from their surroundings.
Comparing sizes allows scientists to examine how geometry relates to density, surface-area-to-volume relationships, and motion across different scales. These comparisons help reveal which dimensions matter in a model and whether a simplified description is appropriate. They also connect measurements of individual objects with broader physical patterns, from particle-scale systems to astronomical bodies.
A practical workflow begins by selecting the dimension that represents the object and choosing a scale or standard unit. The researcher then applies an appropriate method, such as direct comparison with a ruler or boundary resolution through microscopy or imaging. Finally, the measured dimension is reported with attention to resolution and uncertainty so its significance remains clear.
Instrument choice depends on how the object's boundaries can be observed and which dimension must be measured. A ruler supports direct comparison with a standard unit, while microscopes and imaging systems help resolve boundaries that are not readily accessible by direct inspection. Using the suitable instrument links the reported result to the object's observable geometry and measurement limits.
Object size provides a way to compare systems that range from particles to astronomical bodies while preserving meaningful geometric information. Such comparisons support models involving dimensions, density, surface-area-to-volume relationships, and motion. Reporting size together with appropriate resolution and uncertainty helps ensure that conclusions remain tied to what the measurement method can actually distinguish.