Numpy实现Flatten

class Flatten(Layer):
    """ Turns a multidimensional matrix into two-dimensional """
    def __init__(self, input_shape=None):
        self.prev_shape = None
        self.trainable = True
        self.input_shape = input_shape

    def forward_pass(self, X, training=True):
        self.prev_shape = X.shape
        return X.reshape((X.shape[0], -1))

    def backward_pass(self, accum_grad):
        return accum_grad.reshape(self.prev_shape)

    def output_shape(self):
        return (np.prod(self.input_shape),)

  

 

  
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文章来源: wanghao.blog.csdn.net，作者：AI浩，版权归原作者所有，如需转载，请联系作者。

原文链接：wanghao.blog.csdn.net/article/details/120322308