我正在努力重塑自己的形象。其尺寸为(100100,3)。所有图像的总阵列组成(3267100,3)
def get_batch(batch_size,s="train"):
"""Create batch of n pairs, half same class, half different class"""
if s == 'train':
X = Xtrain
X= X.reshape(-1,100,100,3)
#X= X.reshape(-1,20,105,105)
categories = train_classes
else:
X = Xval
X= X.reshape(-1,100,100,3)
categories = val_classes
n_classes, n_examples, w, h, chan = X.shape
print(n_classes)
print(type(n_classes))
print(n_classes.shape)
# randomly sample several classes to use in the batch
categories = rng.choice(n_classes,size=(batch_size,),replace=False)
# initialize 2 empty arrays for the input image batch
pairs=[np.zeros((batch_size, h, w,1)) for i in range(2)]
# initialize vector for the targets
targets=np.zeros((batch_size,))
# make one half of it '1's, so 2nd half of batch has same class
targets[batch_size//2:] = 1
for i in range(batch_size):
category = categories[i]
idx_1 = rng.randint(0, n_examples)
pairs[0][i,:,:,:] = X[category, idx_1].reshape(w, h, chan)
idx_2 = rng.randint(0, n_examples)
# pick images of same class for 1st half, different for 2nd
if i >= batch_size // 2:
category_2 = category
else:
# add a random number to the category modulo n classes to ensure 2nd image has a different category
category_2 = (category + rng.randint(1,n_classes)) % n_classes
pairs[1][i,:,:,:] = X[category_2,idx_2].reshape(w, h,1)
return pairs, targets
但是,当尝试重新塑造数组pairs[0][i,:,:,:] = X[category, idx_1].reshape(w, h, chan)
时,我总是会得到一个错误,即数组大小为300的数组无法重新塑造为(100100,3)。老实说,我不明白为什么它应该是。。。
有人能帮我吗
您需要将300的数组转换为100100,3。这不可能是因为
(100*100*3)=30000
和30000 not equal to 300
只有在输出形状与输入形状具有相同数量的值时,才可以重塑形状我建议你改做
(10,10,3)
,因为(10*10*3)=300
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