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.
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。夫子对此有专业解读
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心理建设、家庭配合心理建设我的理解是要让孩子提前做好心理准备,这需要全家的配合。首先要跟孩子说明,我们马上要上幼儿园了,要早起,所以我们要跟妈妈起床时间一样,告诉孩子时间是8点钟(顺便用家里的钟表简单告诉她什么是8点钟),然后洗漱吃饭,再自己选择想穿的衣服(我会告诉她天晴情况,让她自己选,如果有问题,我再调整),自己穿衣服,然后出门玩耍或者去爷爷奶奶家。