np.zeros取出一行数据

在给定的代码中，np.zeros((4, 2), dtype = "float32")创建了一个4x2的全零数组，即rect。接下来，通过对pts进行一些计算，得到了一些索引值，然后将这些索引值应用到rect数组中，从而取出了一行数据。具体来说，rect代表pts中s值最小的行，rect代表pts中s值最大的行，rect代表pts中diff值最小的行，rect代表pts中diff值最大的行。所以，通过这些操作，可以取出rect数组的一行数据。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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