Table 4.

Summary of the preprocessing and augmentation methods used by the papers

Paper	Resize	Flipping or rotating	Scaling or cropping	Contrast adjusting	Brightness or intensity adjusting	GAN
[3]		$✓$	$✓$
[14]	$✓$		$✓$
[15]	$✓$
[17]	$✓$	$✓$	$✓$		$✓$
[18]	$✓$
[17]		$✓$	$✓$
[21]	$✓$	$✓$	$✓$
[22]	$✓$					$✓$
[21]			$✓$			$✓$
[22]		$✓$	$✓$	$✓$
[25]	$✓$
[27]	$✓$
[28]	$✓$
[29]	$✓$
[30]	$✓$		$✓$
[31]	$✓$	$✓$	$✓$
[32]	$✓$			$✓$
[31]			$✓$
[34]	$✓$	$✓$	$✓$	$✓$	$✓$
[35]	$✓$	$✓$
[35]		$✓$	$✓$
[37]		$✓$	$✓$		$✓$
[41]	$✓$
[42]	$✓$
[43]	$✓$
[42]		$✓$	$✓$
[46]	$✓$	$✓$	$✓$
[48]	$✓$		$✓$
[49]	$✓$	$✓$
[50]	$✓$	$✓$
[49]		$✓$
[52]	$✓$	$✓$			$✓$
[51]		$✓$	$✓$		$✓$
[54]	$✓$	$✓$		$✓$
[54]		$✓$		$✓$
[59]	$✓$					$✓$
[60]	$✓$	$✓$	$✓$
[60]		$✓$
[63]	$✓$					$✓$
[62]				$✓$	$✓$
[66]	$✓$
[67]	$✓$
[68]	$✓$		$✓$
[68]			$✓$
[69]		$✓$		$✓$
[72]	$✓$			$✓$
[71]		$✓$
[74]	$✓$			$✓$
[77]	$✓$		$✓$
[76]		$✓$	$✓$
[77]		$✓$	$✓$	$✓$
[78]		$✓$	$✓$
[80]				$✓$
[82]				$✓$
[84]		$✓$
[85]		$✓$	$✓$	$✓$	$✓$
[86]		$✓$
[87]				$✓$	$✓$
[88]		$✓$
[89]		$✓$	$✓$		$✓$
[92]	$✓$	$✓$		$✓$
[92]			$✓$