def line_loss(self, x, t, k=3):
#print(x.data.type)
lx = x - F.max_pooling_2d(x, k, 1, 1)
lt = t - F.max_pooling_2d(t, k, 1, 1)
return 2 * F.mean_absolute_error(lx, lt)
# 0 for dataset
# 1 for fake
# G_p_rough: output of Generator (paired rough sketch)
# p_line: paired line art
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