vgg16.py 文件源码

def compile_val(self):

        if self.verbose: print('compiling validation function...')

        import theano

        from lasagne.layers import get_output

        output_val = lasagne.layers.get_output(self.output_layer, self.x, deterministic=True)

        from lasagne.objectives import categorical_accuracy, categorical_crossentropy

        cost = categorical_crossentropy(output_val, self.y).mean()
        error = 1-categorical_accuracy(output_val, self.y, top_k=1).mean()
        error_top_5 = 1-categorical_accuracy(output_val, self.y, top_k=5).mean()

        self.val_fn=  theano.function([self.subb_ind], [cost,error,error_top_5], updates=[], 
                                          givens=[(self.x, self.shared_x_slice),
                                                  (self.y, self.shared_y_slice)]
                                                                )