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Contrast (vision)

Index Contrast (vision)

Contrast is the difference in luminance or colour that makes an object (or its representation in an image or display) distinguishable. [1]

42 relations: Activities of daily living, Acutance, Adaptation, Alzheimer's disease, Amblyopia, Angular frequency, Band-pass filter, Brightness, Cataract, Color, Color blindness, Contrast (vision), Contrast ratio, Dynamic range, Encyclopædia Britannica, Field of view, Glaucoma, Image, Landolt C, Lateral inhibition, Luminance, Macular degeneration, Ophthalmology, Optical resolution, Optics, Optometry, Photoreceptor cell, Pixel, Radiocontrast agent, Receptive field, Retina, Retinal ganglion cell, Root mean square, Snellen chart, Spatial frequency, Stroke, The Journal of Physiology, Unsharp masking, Visual acuity, Visual perception, Visual system, Weber–Fechner law.

Activities of daily living

Activities of daily living (ADLs or ADL) is a term used in healthcare to refer to people's daily self care activities.

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Acutance

In photography, the term "acutance" describes a subjective perception of sharpness that is related to the edge contrast of an image.

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Adaptation

In biology, adaptation has three related meanings.

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Alzheimer's disease

Alzheimer's disease (AD), also referred to simply as Alzheimer's, is a chronic neurodegenerative disease that usually starts slowly and worsens over time.

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Amblyopia

Amblyopia, also called lazy eye, is a disorder of sight due to the eye and brain not working well together.

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Angular frequency

In physics, angular frequency ω (also referred to by the terms angular speed, radial frequency, circular frequency, orbital frequency, radian frequency, and pulsatance) is a scalar measure of rotation rate.

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Band-pass filter

A band-pass filter, also bandpass filter or BPF, is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.

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Brightness

Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light.

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Cataract

A cataract is a clouding of the lens in the eye which leads to a decrease in vision.

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Color

Color (American English) or colour (Commonwealth English) is the characteristic of human visual perception described through color categories, with names such as red, orange, yellow, green, blue, or purple.

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Color blindness

Color blindness, also known as color vision deficiency, is the decreased ability to see color or differences in color.

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Contrast (vision)

Contrast is the difference in luminance or colour that makes an object (or its representation in an image or display) distinguishable.

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Contrast ratio

The contrast ratio is a property of a display system, defined as the ratio of the luminance of the brightest color (white) to that of the darkest color (black) that the system is capable of producing.

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Dynamic range

Dynamic range, abbreviated DR, DNR, or DYR is the ratio between the largest and smallest values that a certain quantity can assume.

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Encyclopædia Britannica

The Encyclopædia Britannica (Latin for "British Encyclopaedia"), published by Encyclopædia Britannica, Inc., is a general knowledge English-language encyclopaedia.

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Field of view

The field of view is the extent of the observable world that is seen at any given moment.

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Glaucoma

Glaucoma is a group of eye diseases which result in damage to the optic nerve and vision loss.

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Image

An image (from imago) is an artifact that depicts visual perception, for example, a photo or a two-dimensional picture, that has a similar appearance to some subject—usually a physical object or a person, thus providing a depiction of it.

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Landolt C

A Landolt C, also known as a Japanese Vision Test, Landolt ring or Landolt broken ring, is an optotype, i.e. a standardized symbol used for testing vision.

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Lateral inhibition

In neurobiology, lateral inhibition is the capacity of an excited neuron to reduce the activity of its neighbors.

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Luminance

Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction.

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Macular degeneration

Macular degeneration, also known as age-related macular degeneration (AMD or ARMD), is a medical condition which may result in blurred or no vision in the center of the visual field.

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Ophthalmology

Ophthalmology is a branch of medicine and surgery (both methods are used) that deals with the anatomy, physiology and diseases of the eyeball and orbit.

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Optical resolution

Optical resolution describes the ability of an imaging system to resolve detail in the object that is being imaged.

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Optics

Optics is the branch of physics which involves the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it.

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Optometry

Optometry is a health care profession which involves examining the eyes and applicable visual systems for defects or abnormalities as well as the medical diagnosis and management of eye disease.

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Photoreceptor cell

A photoreceptor cell is a specialized type of neuroepithelial cell found in the retina that is capable of visual phototransduction.

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Pixel

In digital imaging, a pixel, pel, dots, or picture element is a physical point in a raster image, or the smallest addressable element in an all points addressable display device; so it is the smallest controllable element of a picture represented on the screen.

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Radiocontrast agent

Radiocontrast agents are substances used to enhance the visibility of internal structures in X-ray-based imaging techniques such as computed tomography (contrast CT), projectional radiography, and fluoroscopy.

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Receptive field

The receptive field of an individual sensory neuron is the particular region of the sensory space (e.g., the body surface, or the visual field) in which a stimulus will modify the firing of that neuron.

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Retina

The retina is the innermost, light-sensitive "coat", or layer, of shell tissue of the eye of most vertebrates and some molluscs.

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Retinal ganglion cell

A retinal ganglion cell (RGC) is a type of neuron located near the inner surface (the ganglion cell layer) of the retina of the eye.

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Root mean square

In statistics and its applications, the root mean square (abbreviated RMS or rms) is defined as the square root of the mean square (the arithmetic mean of the squares of a set of numbers).

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Snellen chart

A Snellen chart is an eye chart that can be used to measure visual acuity.

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Spatial frequency

In mathematics, physics, and engineering, spatial frequency is a characteristic of any structure that is periodic across position in space.

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Stroke

A stroke is a medical condition in which poor blood flow to the brain results in cell death.

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The Journal of Physiology

The Journal of Physiology is a biweekly peer-reviewed scientific journal that was established in 1878 and is published by Wiley-Blackwell on behalf of The Physiological Society.

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Unsharp masking

Unsharp masking (USM) is an image sharpening technique, often available in digital image processing software.

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Visual acuity

Visual acuity (VA) commonly refers to the clarity of vision.

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Visual perception

Visual perception is the ability to interpret the surrounding environment using light in the visible spectrum reflected by the objects in the environment.

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Visual system

The visual system is the part of the central nervous system which gives organisms the ability to process visual detail, as well as enabling the formation of several non-image photo response functions.

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Weber–Fechner law

The Weber–Fechner law refers to two related laws in the field of psychophysics, known as Weber's law and Fechner's law.

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Redirects here:

Color contrast, Colour contrast, Contrast (formula), Contrast sensation, Contrast sensitivity, Contrast sensitivity function, Contrast threshold, Contrast threshold function, Hard color, Image contrast, Light contrast, Michelson contrast, Soft color, Visual contrast, Weber contrast.

References

[1] https://en.wikipedia.org/wiki/Contrast_(vision)

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