Proportion between the width and the height of a pixel
Not to be confused with Picture aspect ratio.
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Pixel aspect ratio 1:1Pixel aspect ratio 2:1
A Pixel aspect ratio (often abbreviated PAR) is a mathematical ratio that describes how the width of a pixel in a digital image compared to the height of that pixel.
Most digital imaging systems display an image as a grid of tiny, square pixels. However, some imaging systems, especially those that must be compatible with standard-definition television motion pictures, display an image as a grid of rectangular pixels, in which the pixel width and height are different. Pixel aspect ratio describes this difference.
Use of pixel aspect ratio mostly involves pictures pertaining to standard-definition television and some other exceptional cases. Most other imaging systems, including those that comply with SMPTE standards and practices, use square pixels.
PAR is also known as sample aspect ratio and abbreviated SAR, though it can be confused with storage aspect ratio.
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A Pixelaspectratio (often abbreviated PAR) is a mathematical ratio that describes how the width of a pixel in a digital image compared to the height...
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