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29 relations: Bit, Codec, Color image, Color space, Contrast (vision), Data compression ratio, Decibel, Division by zero, Dynamic range, HSL and HSV, Image compression, Image quality, Libjpeg, Logarithm, Lossy compression, Luma (video), Mean squared error, Nanyang Technological University, Noise, Perceptual Evaluation of Video Quality, Pulse-code modulation, RGB color model, Signal, Signal-to-noise ratio, Structural similarity, Subjective video quality, Video quality, Visual masking, YCbCr.
Bit
The bit (a portmanteau of binary digit) is a basic unit of information used in computing and digital communications.
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Codec
A codec is a device or computer program for encoding or decoding a digital data stream or signal.
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Color image
A (digital) color image is a digital image that includes color information for each pixel.
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Color space
A color space is a specific organization of colors.
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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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Data compression ratio
Data compression ratio, also known as compression power, is a computer science term used to quantify the reduction in data-representation size produced by a data compression algorithm.
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Decibel
The decibel (symbol: dB) is a unit of measurement used to express the ratio of one value of a physical property to another on a logarithmic scale.
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Division by zero
In mathematics, division by zero is division where the divisor (denominator) is zero.
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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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HSL and HSV
HSL (hue, saturation, lightness) and HSV (hue, saturation, value) are two alternative representations of the RGB color model, designed in the 1970s by computer graphics researchers to more closely align with the way human vision perceives color-making attributes.
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Image compression
Image compression is a type of data compression applied to digital images, to reduce their cost for storage or transmission.
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Image quality
Image quality (often Image Quality Assessment, IQA) is a characteristic of an image that measures the perceived image degradation (typically, compared to an ideal or perfect image).
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Libjpeg
libjpeg is a free library with functions for handling the JPEG image data format.
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Logarithm
In mathematics, the logarithm is the inverse function to exponentiation.
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Lossy compression
In information technology, lossy compression or irreversible compression is the class of data encoding methods that uses inexact approximations and partial data discarding to represent the content.
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Luma (video)
In video, luma represents the brightness in an image (the "black-and-white" or achromatic portion of the image).
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Mean squared error
In statistics, the mean squared error (MSE) or mean squared deviation (MSD) of an estimator (of a procedure for estimating an unobserved quantity) measures the average of the squares of the errors—that is, the average squared difference between the estimated values and what is estimated.
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Nanyang Technological University
The Nanyang Technological University (Abbreviation: NTU) is an autonomous research university in Singapore.
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Noise
Noise is unwanted sound judged to be unpleasant, loud or disruptive to hearing.
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Perceptual Evaluation of Video Quality
PEVQ (Perceptual Evaluation of Video Quality) is an end-to-end (E2E) measurement algorithm to score the picture quality of a video presentation by means of a 5-point mean opinion score (MOS).
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Pulse-code modulation
Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals.
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RGB color model
The RGB color model is an additive color model in which red, green and blue light are added together in various ways to reproduce a broad array of colors.
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Signal
A signal as referred to in communication systems, signal processing, and electrical engineering is a function that "conveys information about the behavior or attributes of some phenomenon".
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Signal-to-noise ratio
Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.
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Structural similarity
The structural similarity (SSIM) index is a method for predicting the perceived quality of digital television and cinematic pictures, as well as other kinds of digital images and videos.
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Subjective video quality
Subjective video quality is video quality as experienced by humans.
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Video quality
Video quality is a characteristic of a video passed through a video transmission/processing system, a formal or informal measure of perceived video degradation (typically, compared to the original video).
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Visual masking
Visual masking occurs when the perception of one stimulus, called a target, is affected by the presence of another stimulus, called a mask.
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YCbCr
YCbCr, Y′CbCr, or Y Pb/Cb Pr/Cr, also written as YCBCR or Y'CBCR, is a family of color spaces used as a part of the color image pipeline in video and digital photography systems.
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PSNR.
References
[1] https://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio
