A low threshold preserves detail (more leaf nodes, less compression). A high threshold merges aggressively (fewer leaves, more compression, but the image gets blocky). The grid overlay shows the quadtree structure: large cells in uniform areas, small cells where detail is preserved.
Aston Martin said: "Having undertaken at the start of 2025 a process to make organisational adjustments to ensure the business was appropriately resourced for its future plans, we had to take the difficult decision at the end of 2025 to implement further changes.
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高端电动两轮车市场的 “增量空间”，值得商榷。中泰证券测算的 “一线 + 新一线城市年销量增量 660 万台”，建立在 45% 渗透率的理想假设之上，但现实是，北京、上海等特大城市公共交通体系完善，两轮车渗透率天花板仅 40%-50%，且九号已占据高端市场半壁江山，向上的增长空间几近枯竭。而新一线城市因地形、地方政策、公共交通配套的差异，两轮车保有量存在显著方差，并非单纯依靠产品升级就能实现市场渗透，九号的拓店计划在重庆、成都等低渗透率城市已遭遇明显的水土不服。
But some question whether this expensive technology is worth it.
Urgent research needed to tackle AI threats, says Google AI boss