An image is represented by pixels, which are organized in a grid. Each pixel contains color and luminance information, limited by the image format. Common image formats include JPEG, AVIF, and PNG. AVIF can store pixel data in varying bits, while JPEG XL supports higher bit depths. The distinction between image pixels and device pixels is essential; image pixels are part of the data, while device pixels are the physical units on displays. Display technology varies, affecting how images are shown on screens.
To display an image, a device needs to get information about the colors of different parts of the image from a data source.
Pixels have a few important properties: They're arranged in a grid to form an image, and the order matters. Each pixel holds color and luminance information.
Image pixels are part of image data, while device pixels are physical pixels that depend on the display. The way device pixels work can vary.
AVIF can use 8, 10, or 12 bits to store pixel data. JPEG XL supports up to 32 bits per color channel.
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