Advertisement

Topics

Ultra-rapid object categorization in real-world scenes with top-down manipulations.

08:00 EDT 10th April 2019 | BioPortfolio

Summary of "Ultra-rapid object categorization in real-world scenes with top-down manipulations."

Humans are able to achieve visual object recognition rapidly and effortlessly. Object categorization is commonly believed to be achieved by interaction between bottom-up and top-down cognitive processing. In the ultra-rapid categorization scenario where the stimuli appear briefly and response time is limited, it is assumed that a first sweep of feedforward information is sufficient to discriminate whether or not an object is present in a scene. However, whether and how feedback/top-down processing is involved in such a brief duration remains an open question. To this end, here, we would like to examine how different top-down manipulations, such as category level, category type and real-world size, interact in ultra-rapid categorization. We have constructed a dataset comprising real-world scene images with a built-in measurement of target object display size. Based on this set of images, we have measured ultra-rapid object categorization performance by human subjects. Standard feedforward computational models representing scene features and a state-of-the-art object detection model were employed for auxiliary investigation. The results showed the influences from 1) animacy (animal, vehicle, food), 2) level of abstraction (people, sport), and 3) real-world size (four target size levels) on ultra-rapid categorization processes. This had an impact to support the involvement of top-down processing when rapidly categorizing certain objects, such as sport at a fine grained level. Our work on human vs. model comparisons also shed light on possible collaboration and integration of the two that may be of interest to both experimental and computational vision researches. All the collected images and behavioral data as well as code and models are publicly available at https://osf.io/mqwjz/.

Affiliation

Journal Details

This article was published in the following journal.

Name: PloS one
ISSN: 1932-6203
Pages: e0214444

Links

DeepDyve research library

PubMed Articles [13119 Associated PubMed Articles listed on BioPortfolio]

Eye-movement behaviours when viewing real-world pain-related images.

Pain-related cues are evolutionarily primed to capture attention, although evidence of attentional biases towards pain-related information is mixed in healthy individuals. The present study explores w...

Local contour symmetry facilitates scene categorization.

People are able to rapidly categorize briefly flashed images of real-world environments, even when they are reduced to line drawings. This setting allows for the study of time-limited perceptual group...

Decisional space modulates visual categorization - Evidence from saccadic reaction times.

Manual and saccadic reaction times (SRTs) have been used to determine the minimum time required for different types of visual categorizations. Such studies have demonstrated extremely rapid detection ...

Pigeons Spontaneously Form Three-Dimensional Shape Categories.

We explored the pigeon's representation of the shape of simple three-dimensional objects (geons) rotated in depth (four views each of four geons). Pigeons assigned to the Categorization group had to r...

VSSA-NET: Vertical Spatial Sequence Attention Network for Traffic Sign Detection.

Although traffic sign detection has been studied for years and great progress has been made with the rise of deep learning technique, there are still many problems remaining to be addressed. For compl...

Clinical Trials [4572 Associated Clinical Trials listed on BioPortfolio]

The Development of Categorization

It is commonly believed that objects in the world can be categorized in at least three different ways or levels. The three levels are basic, superordinate, and subordinate. Previously it ...

Identification and Research of Impacts of Social Categorization Process in Nurse Triage (SOCIAL SORTING)

Social Sorting is a: non interventional, observational, qualitative and multicenter research. It investigates three French emergency units in three French centers (UH of Angers, H of Le Ma...

sTep dOWn Inhalers in the reAl woRlD

To establish the feasibility of stopping inhaled steroids and switching or maintaining dual bronchodilation in one visit - in the real world, for people with COPD.

Ultra Rapid Culture Independent Detection of High-Priority Carbapenem Resistant Enterobacteriaceae Directly From Blood

The purpose of this study is to develop a new and very rapid diagnostic test for identifying a certain type of bacteria called Enterobacteriaceae in blood. Rapid identification of bacteria...

Brain Bases of Natural Scenes's Visual Perception of Natural Scenes

Using the available data from psychophysics, cellular electrophysiology and functionnal neuroanatomy of visual pathway, current models of visual recognition suppose that the perception of ...

Medical and Biotech [MESH] Definitions

Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.

A highly customized interactive medium or program that allows individuals to learn and practice real world activities in an accurate, realistic, safe and secure environment.

A system using beamed and reflected radio signals to and from an object in such a way that range, bearing, and other characteristics of the object may be determined.

The act of "taking account" of an object or state of affairs. It does not imply assessment of nor attention to the qualities or nature of the object.

The making of a radiograph of an object or tissue by recording on a photographic plate the radiation emitted by radioactive material within the object. (Dorland, 27th ed)

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Relevant Topic

Antiretroviral therapy
Standard antiretroviral therapy (ART) consists of the combination of at least three antiretroviral (ARV) drugs to maximally suppress the HIV virus and stop the progression of HIV disease. Huge reductions have been seen in rates of death and suffering whe...


Searches Linking to this Article