PURPOSE To evaluate postoperative metamorphopsia in macula-off rhegmatogenous retinal detachment (RRD) and its association with visual function, vision related quality of life, and optical coherence tomography (OCT) findings. METHODS 45 patients with primary macula-off RRD were included. At 12 months postoperatively, data on metamorphopsia using sine amsler charts (SAC), best corrected visual...

A subset of caudate neurons fires before cues that instruct the monkey what he should do. To test the hypothesis that the anticipatory activity of such neurons depends on the context of stimulus-reward mapping, we examined their activity while the monkeys performed a memory-guided saccade task in which either the position or the color of a cue indicated presence or absence of reward. Some neuro...

Since the visual appearance of food and other biological products is a major factor in the judgment of quality, visual inspection is an important part of quality control in these industries. This inspection has historically been performed by use of the only “tool” available, the human eye. The processaccompanying data acquisition, automatic evaluation and direct control of the ambient condition...

visibility is an important factor of environmental quality that has various influences on the quality of neighborhood. this paper aimed to find the relationship between urban form and visual quality. a public space with a spatial configuration in one of bushehr city's neighborhoods was selected as the case study. bushehr city is surrounded by urban development and the sea. compact urban sp...

The rationale, formulae, and examples for assessing the color inconstancy of consumer digital cameras are pre­ sented. Its use is appropriate for evaluating the color/neutral balance precision of consumer digital camera systems with respect to illumination quality; specifically for a given rendering intent such as sRGB or ROMM. Adopting the ∆E94* color difference measure, an extended color inco...

This paper proposes a gamut mapping algorithm based on color space division for color reproduction of cross media. As each color device has a limited range of producible colors, the reproduced colors on a destination device are different from those of the original device. In order to reduce the color difference between those devices, the proposed method divides the whole gamut into parabolic sh...

Image enhancement is aimed to improve image quality by maximizing the information content in the input image. In this article a PSO based hue preserving color image enhancement technique is proposed. The process is as follows. Image enhancement is considered as an optimization problem and particle swarm optimization (PSO) is used to solve it. The quality of the intensity image is improved by a ...

Automated visual inspection of industrial textile printing has the potential to increase the overall print quality. In this article, we investigate whether all printed colors can be detected by CCD cameras and determine the color measurement precision.Occurring deviations in color values of homogenouesly colored textile patches are explained by the dichromatic reflection model. An extra clue is...

Past work demonstrated how monochromatic visual stimuli could be faithfully encoded and decoded under Nyquist-type rate conditions. Color visual stimuli were then traditionally encoded and decoded in multiple separate monochromatic channels. The brain, however, appears to mix information about color channels at the earliest stages of the visual system, including the retina itself. If informatio...

A real-time visual proces:sing theory is used to analyze real and illusory contour formation, contour and :brightness interactions, neon color spreading, complementary color induction, and filling-in of discounted illuminants and s<;otomas. The theory also physically interprets and generalizes Land's retinex theory. These phenomena are traced to adaptive processes that overcome limitations of v...