Table 3.

Detailed structure of C-DenseNet variants.

Layers	Output Size	C-DenseNet-121(k=32)	C-DenseNet-169(k=32)	C-DenseNet-201(k=32)
Convolution	640 × 640	7 × 7 conv,stride2
Pooling	320 × 320	3 × 3max pool,stride2
Dense Block 1	320 × 320	$$\left(\begin{array}{c}1\times 1\text{\hspace{0.17em}conv}\\ 3\times 3\text{\hspace{0.17em}conv}\end{array}\right)\times 6$$
Transition Layer 1	320 × 320	1 × 1 conv
	160 × 160	2 × 2 average pool
CBAM Layer 1	160 × 160	scale × 1
Dense Block 2	160 × 160	$$\left(\begin{array}{c}1\times 1\text{\hspace{0.17em}conv}\\ 3\times 3\text{\hspace{0.17em}conv}\end{array}\right)\times 12$$
Transition Layer 2	160 × 160	1 × 1 conv
	80 × 80	2 × 2 average pool
CBAM Layer 2	80 × 80	scale × 1
Dense Block 3	80 × 80	$$\left(\begin{array}{c}1\times 1\text{\hspace{0.17em}conv}\\ 3\times 3\text{\hspace{0.17em}conv}\end{array}\right)\times 24$$	$$\left(\begin{array}{c}1\times 1\text{\hspace{0.17em}conv}\\ 3\times 3\text{\hspace{0.17em}conv}\end{array}\right)\times 32$$	$$\left(\begin{array}{c}1\times 1\text{\hspace{0.17em}conv}\\ 3\times 3\text{\hspace{0.17em}conv}\end{array}\right)\times 48$$
Transition Layer3	80 × 80	1 × 1 conv
	40 × 40	2 × 2 average pool
CBAM Layer 3	40 × 40	1 × 1scale
Dense Block 4	40 × 40	$$\left(\begin{array}{c}1\times 1\text{\hspace{0.17em}conv}\\ 3\times 3\text{\hspace{0.17em}conv}\end{array}\right)\times 16$$	$$\left(\begin{array}{c}1\times 1\text{\hspace{0.17em}conv}\\ 3\times 3\text{\hspace{0.17em}conv}\end{array}\right)\times 32$$	$$\left(\begin{array}{c}1\times 1\text{\hspace{0.17em}conv}\\ 3\times 3\text{\hspace{0.17em}conv}\end{array}\right)\times 32$$
Classification Layer	1 × 1	40 × 40 average pooling
		fully-connected, softmax