Uniform regions (solid backgrounds, smooth gradients) get stored as large blocks. Detailed regions (edges, textures) get subdivided into smaller blocks. You end up with a compressed representation that preserves detail where it exists and simplifies where it can.
Digest: sha256:5638b6581830be13c9ae418c5d1587f36c7f99b3860326fa7b163bef70236438
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Alarm bells are ringing in the UK research community. Physics departments may close and researchers leave the UK. What is happening and why?，这一点在safew官方版本下载中也有详细论述