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Chapter 1. Getting Started with Photoshop CS2 > Working with Non-Squared Pixels

Working with Non-Squared Pixels

Images displayed on a computer monitor are made up of square pixels. Conversely, an image displayed on a video monitor is analog and does not involve pixel shape. Non-square pixels are the most commonly used by encoding devices for video production. When importing an image created by a square-pixel graphics program into a video editing program such as Adobe Premiere, the square pixels are automatically scaled to the non-square pixels for video encoding. This scaling results in a distorted image. By default, non-square pixel documents open with Pixel Aspect Ratio Correction enabled. This enables you to preview how the image will appear on the output device such as a video monitor, and see how it will appear when exported to an analog video device. In keeping with an ever-changing industry, Adobe added three new Pixel Aspect Ratio options: D4/D16 Standard (0.95), HDV Anamorphic (1.333), and D4/D16 Anamorphic (1.0) ().


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