Results 31 to 40 of about 63,357 (302)

Edge-region grouping in figure-ground organization and depth perception. [PDF]

open access: yes, 2008
Edge-region grouping (ERG) is proposed as a unifying and previously unrecognized class of relational information that influences figure-ground organization and perceived depth across an edge. ERG occurs when the edge between two regions is differentially
Brooks, Joseph L, Palmer, Stephen E.
core   +1 more source

Agreement between distance and near minus-lens-to-blur amplitude of accommodation in pre-presbyopic subjects

open access: yesAfrican Vision and Eye Health, 2019
Background: Guidelines for predicting the amplitude of accommodation (AA) sometimes are based on measurements for the subjective push-up-to-blur method. However, the push-up-to-blur method often overestimates the accommodative response.
Mbali Z.G. Ndlovu   +4 more
doaj   +1 more source

Simulated validation and quantitative analysis of the blur of an integral image related to the pickup sampling effects [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2014
In an integral imaging (II) system, the pickup sampling effects play an important role in affecting the blur of an integral image. In this paper, the blur property of an integral image due to the pickup sampling artifacts is first analyzed.
Chen Y., Wang X., Zhang J., Zong J.
doaj   +1 more source

Perceived blur in amblyopia [PDF]

open access: yesOphthalmic and Physiological Optics, 2002
Purpose:  It is well documented that visual acuity and contrast sensitivity in amblyopia are attenuated at high spatial frequencies: this would predict that amblyopes should perceive objects as blurred because they lack high spatial frequency information necessary to adequately represent sharp edges. In a series
Anita J, Simmers   +2 more
openaire   +2 more sources

Evaluation of Blur and Gaussian Noise Degradation in Images Using Statistical Model of Natural Scene and Perceptual Image Quality Measure [PDF]

open access: yesRadioengineering, 2017
In this paper we present new method for classification of image degradation type based on Riesz transform coefficients and Blind/Referenceless Image Spatial Quality Evaluator (BRISQUE) that employs spatial coefficients.
A. Bjelopera, E. Dumic, S. Grgic
doaj  

Depth perception with gaze-contingent depth of field

open access: yes, 2014
Blur in images can create the sensation of depth because it emulates an optical property of the eye; namely, the limited depth of field created by the eye's lens. When the human eye looks at an object, this object appears sharp on the retina, but objects
Miguel A. Nacenta   +7 more
core   +1 more source

A New Full-Reference Image Quality Metric for Motion Blur Profile Characterization

open access: yesIEEE Access, 2021
Motion blur is common in images captured by handheld devices, arising from hand, device and/or object motion. To restore sharp images from the images degraded by the motion, it is extremely important to assess the quality of the captured image and its ...
Mohammad Abdullah-Al-Mamun   +2 more
doaj   +1 more source

Handling Gaussian blur without deconvolution [PDF]

open access: yes, 2022
The paper presents a new theory of invariants to Gaussian blur. Unlike earlier methods, the blur kernel may be arbitrary oriented, scaled and elongated.
Kostková, Jitka   +3 more
core   +1 more source

Le flou du temps, le temps du flou chez Michael Wesely

open access: yesFocales
This essay analyzes photographs in which the blur is the deliberate result of a very long exposure, up to several years. In this case, it is not so much the movement of the human or animal body (or of vehicles) that generates this blurring, but the ...
Marc Lenot
doaj   +1 more source

Calibration features of information-measuring systems for diagnosing technical condition based on the analysis of the mark image blurring

open access: yesИзвестия высших учебных заведений. Поволжский регион:Технические науки, 2023
Background. The necessity of creating diagnostic systems for vibro-loaded objects is shown. Contactless systems have sufficient capabilities to determine the amplitude of vibrations, it is noted that an important part of such systems is the calibration ...
Nikita S. Reuta   +4 more
doaj   +1 more source

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