假设一个长度维68的二维数组
[[710 230]
[712 252]
[716 276]
[727 297]
[740 318]
[754 341]
[768 365]
[783 384]
[805 391]
[833 387]
[862 371]
[886 351]
[908 327]
[923 301]
[928 271]
[930 241]
[931 210]
[706 207]
[713 199]
[726 200]
[741 204]
[755 210]
[792 206]
[813 198]
[835 193]
[857 193]
[879 198]
[774 226]
[772 245]
[768 265]
[765 285]
[756 290]
[765 294]
[775 298]
[788 293]
[801 290]
[726 225]
[734 221]
[746 222]
[757 227]
[746 229]
[734 229]
[815 226]
[826 219]
[840 219]
[854 222]
[842 228]
[827 228]
[759 317]
[764 315]
[772 316]
[782 319]
[795 317]
[818 318]
[841 319]
[820 338]
[798 346]
[785 346]
[773 343]
[765 333]
[765 318]
[773 323]
[783 325]
[796 325]
[834 320]
[796 330]
[783 330]
[773 327]
[159 227]
[159 254]
[160 282]
[163 308]
[172 332]
[188 355]
[209 375]
[231 390]
[256 396]
[280 393]
[300 379]
[317 361]
[334 340]
[347 317]
[353 292]
[357 267]
[359 242]
[196 225]
[213 217]
[231 216]
[249 220]
[266 226]
[302 224]
[317 220]
[331 218]
[344 220]
[352 227]
[284 251]
[284 270]
[284 289]
[283 308]
[256 314]
[268 317]
[279 321]
[290 317]
[299 313]
[218 250]
[231 247]
[244 248]
[253 254]
[242 257]
[229 256]
[305 254]
[316 248]
[327 248]
[337 251]
[328 258]
[316 258]
[236 342]
[250 336]
[264 335]
[274 337]
[284 335]
[294 337]
[300 343]
[292 354]
[282 360]
[271 361]
[260 360]
[248 355]
[242 342]
[263 342]
[273 343]
[283 342]
[294 344]
[283 347]
[272 348]
[262 347]]
max_x = max(array, key=lambda x: x[0])
max_y = max(array, key=lambda x: x[1])
min_x = min(array, key=lambda x: x[0])
min_y = min(array, key=lambda x: x[1])
然后再取索引
max_x = max(landmarks_reshape, key=lambda x: x[0])[0]
max_y = max(landmarks_reshape, key=lambda x: x[1])[1]
min_x = min(landmarks_reshape, key=lambda x: x[0])[0]
min_y = min(landmarks_reshape, key=lambda x: x[1])[1]