PAR,DAR和SAR

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AR都是Aspect Ratio的首字母缩写,表示不同方向的比例。

DAR,Display AR,显示宽高比,比如16:9;

PAR其实和SAR是一样的,P表示Pixel,S表示Sample,都是指一个像素点。一般PAR和SAR都是1:1,表示pixel是一个小小的正方形。

三者的关系:PAR x SAR = DAR

Pixel Aspect Ratio

A pixel is a pixel, it is a small block of color information. However, some playback devices have different shaped pixels than others. Computer monitors have square pixels and hence everything that is designed for display on a monitor should have a PAR of 1. TVs however have ‘rectangular pixels’ which have a different PAR depending on the format (NTSC or PAL).

本文链接:https://cs.pynote.net/ag/image/202204171/

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