Real image compression (JPEG, PNG) uses different techniques (DCT, entropy coding), but quadtrees capture the same principle: spend your bits where the detail is, not uniformly across the whole image.
Germany's Schaeffler has been working on actuators for the Humanoid robot
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The figures for 2025 are the highest since records began in 2010. The previous peak was in 2017.
Sewage spills into a Hampshire river could threaten the future of Atlantic salmon, an MP has warned.