Table 2. Overall parameter comparison for SegNet, U-net, and proposed path-wise U-net.

Parameters	SegNet [19]	U-net [8]	Proposed patch-wise U-net
Input size	Input image size 208×176	Input image size 256×256	Input image slice 256×256 and divided into four patch size of 128×128
Convolution operation	3×3 convolutions with stride of 1 and padding	3×3 convolutions with stride of 1 and padding	3×3 convolutions with stride of 1 and padding
Activation	ReLU transfer function	ReLU transfer function	ReLU transfer function
Max Operation	2×2 max pooling with stride of 2 and padding	2×2 max pooling with stride of 2 and padding	2×2 max pooling with stride of 2 and padding
Output	Softmax output function	Softmax output function	Softmax output function
Total operations	Total of 8 convolution operations, 2 max-pooling and 2 max-unpooling operations	Total of 15 convolution operations, 3 max-pool and 3 up-conv operations	Total of 15 convolution operations, 3 max-pool and 3 up-conv operations