yolo keras preprocess_true_boxes 代码解读

import numpy as np
a=np.array(list(range(3*4*5))).reshape((3,4,5))
print('a=',a)
print('-'*36+'>')
b=a[...,0]>5
print('b=',b)
print('-'*36+'>')
print('a[0,b[0]]=',a[0,b[0]])
print('-'*36+'>')

a= [[[ 0  1  2  3  4]
  [ 5  6  7  8  9]
  [10 11 12 13 14]
  [15 16 17 18 19]]

 [[20 21 22 23 24]
  [25 26 27 28 29]
  [30 31 32 33 34]
  [35 36 37 38 39]]

 [[40 41 42 43 44]
  [45 46 47 48 49]
  [50 51 52 53 54]
  [55 56 57 58 59]]]
------------------------------------>
b= [[False False  True  True]
 [ True  True  True  True]
 [ True  True  True  True]]
------------------------------------>
a[0,b[0]]= [[10 11 12 13 14]
 [15 16 17 18 19]]
------------------------------------>