How is the pixel aspect ratio (PAR) defined?

The pixel aspect ratio (PAR) is defined as the ratio of width to height in an image. This measurement is crucial in the field of digital imaging and video, as it helps determine how images are displayed on screens or printed in physical formats.

In a digital context, images can have different widths and heights for their individual pixels, affecting how they are rendered. A standard pixel aspect ratio of 1:1 means that each pixel is square, with equal width and height. However, non-square pixels can exist, particularly in film and video formats, where the pixel may be taller or wider than it is high. Understanding the pixel aspect ratio ensures that images maintain their intended proportions during playback or viewing, ultimately affecting the overall quality and clarity of the visual output.

This aspect ratio plays a significant role in ensuring graphics are accurately represented, particularly when dealing with various formats and displays, making it essential knowledge for professionals working with digital media.