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Binary Phase Shaping and SHG Contrast Ratios

Journal of Applied Mathematics and Physics
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Articulation: Brightness, Apparent Illumination, and Contrast Ratios

Perception, 2002
Luminance edges in the environment can be due to regions that differ in reflectance or in illumination. In three experiments, we varied the spatial organization of 10 achromatic (simulated) surfaces so that some arrangements were consistent with an ecologically valid and parsimonious interpretation of 5 surfaces under two different illuminants.
James A, Schirillo, Steven K, Shevell
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Acoustooptical device with extremely high contrast ratio

Applied Optics, 1983
A double-path arrangement with two separate beams passing through the crystal of an AO modulator is proposed in order to significantly increase the static contrast ratio of the system. The different components of light leakage affecting the contrast ratio are considered theoretically. The experiments with a new AO arrangement are described.
A, Men, M, Rosenberg
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A contrast ratio constraint on stereo matching

Proceedings of the Royal Society of London. Series B: Biological Sciences, 1995
Stereopsis employs differences in the location of features in the two eyes to reconstruct their relative depths. Computational models largely ignore the contrast of these features; they simply require them to be visible in each eye and to possess the same contrast polarity.
H S, Smallman, S P, McKee
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Ultrahigh-contrast-ratio silicon Fano diode

Physical Review A, 2012
We report a distinguished mechanism of using two interaction-free (uncoupled) cavities to realize an all-optical silicon diode with an extremely high contrast ratio. In contrast to existing examples of all-optical diodes, our unidirectional transmission results from mimicking Fano resonance in a compact and finite silicon waveguide.
Ding, W., Luk'Yanchuk, B., Qiu, C.-W.
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Grayscale contrast enhancement based on greyscale-based contrast-to-noise ratio

Medical Imaging 2021: Image Perception, Observer Performance, and Technology Assessment, 2021
Subjective reading is still the majority way in current medical image diagnostics, and the visualization effect of images is one important factor which may affect the reading performance or diagnostic quality. In computed tomography (CT), CT numbers are converted into greyscale images by the display window settings.
Wei Zhou, Yi Tian, Xiaolu Cai, Zhenyu Fei   +3 more
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Contrast Ratio Quantification During Visualization of Microvasculature

2018
Visualization and monitoring of capillary loops in dermis and mucosa are of interest for a number of clinical applications, such as capillaroscopy, early cancer, or shock detection. For historical reasons, an unaided eye is still a primary aide to diagnostics in visual examinations for many medical specializations. However, the ability to make an early
G, Saiko, A, Douplik
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