EURASIP Journal on Advances in Signal Processing

Table 1 Mean, standard deviation and error standard deviation for regions A, B, and C.

From: A Level Set Filter for Speckle Reduction in SAR Images

	A Region	B Region	Vertical line of = 417
	Raw data	Raw data	Raw data
Raw image	Mean: 186.515	Mean: 102.284	Mean: 115.445
	Std: 7356.633	Std: 557.088	Std: 3807.465
	Error std: 0.000	Error std: 0.000	Error std: 0.000
Degraded image by speckle	Mean: 168.146	Mean: 96.008	Mean: 107.806
	Std: 6474.725	Std: 1063.434	Std: 3551.714
	Error std: 1694.889	Error std: 576.947	Error std: 864.951
Lee Filter	Mean: 167.054	Mean: 95.558	Mean: 106.755
	Std: 5318.111	Std: 508.609	Std: 2891.598
	Error std: 796.122	Error std: 110.071	Error std: 285.072
Enhanced Lee Filter	Mean: 170.137	Mean: 98.565	Mean: 109.898
	Std: 5490.712	Std: 521.443	Std: 2975.532
	Error std: 725.142	Error std: 85.426	Error std: 283.281
Kuan Filter	Mean: 167.667	Mean: 96.006	Mean: 107.250
	Std: 5258.601	Std: 508.466	Std: 2866.156
	Error std: 756.300	Error std: 104.209	Error std: 266.664
Frost Filter	Mean: 167.875	Mean: 95.998	Mean: 107.378
	Std: 5205.227	Std: 509.813	Std: 2849.575
	Error std: 737.993	Error std: 104.189	Error std: 253.703
Enhanced Frost Filter	Mean: 170.349	Mean: 98.752	Mean: 110.125
	Std: 5432.889	Std: 510.254	Std: 2965.519
	Error std: 705.102	Error std: 76.273	Error std: 268.414
Gamma Filter	Mean: 169.335	Mean: 97.692	Mean: 108.734
	Std: 5617.564	Std: 555.922	Std: 3026.878
	Error std: 777.002	Error std: 113.264	Error std: 326.011
Level set Filter	Mean: 181.439	Mean: 90.712	Mean: 105.244
	Std: 7673.753	Std: 841.549	Std: 4245.700
	Error std: 420.243	Error std: 323.605	Error std: 376.056

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