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Chapter 21. PNG Format > Special Features

21.6. Special Features

You may choose to use a PNG (in that perfect world) for some of its advanced features that no other graphic offers, such as variable transparency levels and full color management systems for automatic image correction, including gamma and color balance corrections.

21.6.1. Interlacing (Progressive Display)

Like GIFs, PNGs can be encoded for interlaced display. When this option is selected, the image displays in a series of passes, the first displaying after only a portion of the file has been downloaded, and each subsequent pass increasing in detail and clarity until the whole image is rendered.


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