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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.。关于这个话题，WPS官方版本下载提供了深入分析
Source: Computational Materials Science, Volume 267，详情可参考heLLoword翻译官方下载
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