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Contrast (vision)

About: Contrast (vision) is a research topic. Over the lifetime, 10379 publications have been published within this topic receiving 221480 citations.


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Journal ArticleDOI
TL;DR: Investigating how these regions are modulated by two common variables in reading found that increasing word length increases the demands on both local feature and global shape processing, but increasing visual contrast increases the demanding on local feature processing while decreasing the demand on global shapeprocessing.
Abstract: Previous studies have shown differential responses in the fusiform and lingual gyri during reading and suggested that the former is engaged in processing local features of visual stimuli and the latter is engaged in global shape processing. We used positron emission tomography in order to investigate how these regions are modulated by two common variables in reading: word length (three, six and nine letters) and perceptive similarity to the background (high and low contrast). Increasing both word length and visual contrast had a positive monotonic effect on activation in the bilateral fusiform. However, in the lingual gyrus, activation increased with increasing word length but decreased with increasing contrast. On the basis of previous studies, we suggest that (i) increasing word length increases the demands on both local feature and global shape processing, but (ii) increasing visual contrast increases the demands on local feature processing while decreasing the demands on global shape processing.

234 citations

Journal ArticleDOI
TL;DR: It was found that training substantially improved visual acuity and contrast-sensitivity functions in the amblyopic eyes of all the observers in Groups I and II, although no significant performance improvement was observed in Group III.

234 citations

Journal ArticleDOI
TL;DR: This work presents a new contrast enhancing color to grayscale conversion algorithm which works in real-time and has the advantages of continuous mapping, global consistency, andgrayscale preservation, as well as predictable luminance, saturation, and hue ordering properties.

233 citations

Journal ArticleDOI
TL;DR: An oriented DOG (ODOG) model is introduced which differs from the DOG model in that the filters are anisotropic and their outputs are pooled nonlinearly and argues strongly that the induced brightness phenomena of SBC, GI, the White effect and the Todorovic demonstration, primarily reflect early-stage cortical filtering operations in the visual system.

233 citations

Journal ArticleDOI
TL;DR: The detectability of compound gratings containing two sinusoidal components was compared to that of each component alone and the results are consistent with models postulating several sizes of receptive fields at each position in the visual field but not with model postulating only one size at each positions.

233 citations


Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
20231,864
20223,760
2021413
2020329
2019354