groupProj. UProj. WSCorr. UCorr. WS BLLCMPos. angler MU MP

12209 477.30 2747.36 248.90 1437.98 -15.00 244.37 3.99 192.04 0.3206 -441.6 -203.0


previous   or   next   observation for the same group / back to the solar disc

SDO HMI 2014-11-20 09:00:26 UT

No observation available
See sunspots with tool (Click here to study sunspot positions and configurations with tool using white-light and magnetogram images and polarity drawing)
(It is recommended to set high resolution on your display!)


spotProj. UProj. WSCorr. UCorr. WSBLLCMPos. angler MU MP

1 0.00 1.03 0.00 0.68 -14.14 279.13 38.75 245.75 0.6680 582.0 426.3
2 0.00 1.89 0.00 1.12 -4.87 272.82 32.44 257.60 0.5494 790.0 635.9
3 0.00 1.03 0.00 0.61 -5.14 272.77 32.38 257.10 0.5494 719.0 690.7
4 0.00 1.29 0.00 0.79 -15.13 272.93 32.55 240.62 0.5983 600.0 517.1
5 0.00 0.94 0.00 0.55 -5.35 271.45 31.07 256.19 0.5312 733.0 620.4
6 0.00 1.20 0.00 0.71 -10.65 271.47 31.09 246.82 0.5542 546.0 402.1
7 0.00 1.12 0.00 0.65 -4.12 270.83 30.45 258.26 0.5184 839.0 732.1
8 0.00 0.77 0.00 0.46 -9.73 271.06 30.68 248.14 0.5439 690.0 542.4
9 0.00 0.60 0.00 0.35 -5.21 270.44 30.05 256.02 0.5161 806.0 646.3
10 0.00 2.83 0.00 1.67 -9.91 270.76 30.38 247.65 0.5408 816.0 682.5
11 0.00 1.03 0.00 0.61 -11.28 270.88 30.49 245.37 0.5496 587.0 524.3
12 0.00 2.75 0.00 1.63 -12.28 270.86 30.47 243.67 0.5551 746.0 516.1
13 0.00 1.63 0.00 0.98 -13.64 271.01 30.62 241.57 0.5651 528.0 318.6
14 0.00 2.40 0.00 1.40 -9.08 270.12 29.74 248.71 0.5279 741.0 552.6
15 0.00 0.77 0.00 0.47 -17.52 270.93 30.54 235.53 0.5901 547.0 427.7
16 0.00 0.69 0.00 0.39 -5.96 269.11 28.73 253.94 0.4995 -661.0 -507.4
17 0.00 1.29 0.00 0.75 -12.16 269.44 29.06 242.84 0.5358 644.0 476.7
18 0.00 0.86 0.00 0.54 -20.53 270.81 30.43 231.16 0.6111 740.0 547.6
19 0.00 0.94 0.00 0.55 -10.87 268.68 28.30 244.52 0.5178 719.0 665.9
20 0.00 0.60 0.00 0.35 -9.53 268.52 28.13 246.82 0.5079 523.0 433.9
21 0.00 2.15 0.00 1.21 -7.40 267.34 26.96 250.08 0.4801 580.0 420.8
22 0.00 1.20 0.00 0.67 -5.05 267.08 26.69 254.69 0.4659 593.0 468.1
23 0.00 1.20 0.00 0.67 -5.62 267.07 26.69 253.50 0.4681 736.0 647.4
24 0.00 1.12 0.00 0.63 -6.97 267.14 26.76 250.80 0.4752 889.0 790.2
25 0.00 1.12 0.00 0.66 -15.68 268.04 27.65 235.85 0.5421 398.0 355.4
26 0.00 1.29 0.00 0.72 -7.24 267.09 26.71 250.23 0.4758 811.0 672.7
27 0.00 1.46 0.00 0.93 -24.72 269.58 29.20 224.66 0.6329 554.0 539.6
28 0.00 1.29 0.00 0.72 -6.19 266.83 26.45 252.20 0.4670 901.0 738.3
29 0.00 1.03 0.00 0.61 -17.05 267.97 27.58 233.65 0.5518 566.0 438.1
30 0.00 0.77 0.00 0.43 -5.97 266.72 26.34 252.57 0.4644 769.0 624.9
31 0.00 0.86 0.00 0.50 -15.39 267.61 27.23 235.92 0.5347 702.0 555.4
32 0.00 1.63 0.00 0.96 -15.73 267.59 27.21 235.36 0.5371 705.0 557.0
33 0.00 1.03 0.00 0.61 -17.44 267.23 26.84 232.33 0.5464 810.0 712.1
34 0.00 1.03 0.00 0.62 -20.63 266.12 25.74 226.57 0.5619 689.0 608.5
35 0.00 1.29 0.00 0.72 -10.73 264.76 24.37 241.44 0.4636 694.0 604.5
36 0.00 2.15 0.00 1.18 -7.43 264.16 23.78 247.65 0.4341 802.0 640.8
37 0.00 1.37 0.00 0.75 -6.48 262.91 22.53 248.72 0.4103 813.0 522.6
38 0.00 2.66 0.00 1.44 -7.79 262.43 22.05 245.30 0.4111 693.0 580.4
39 0.00 0.94 0.00 0.52 -10.44 262.01 21.63 239.15 0.4241 793.0 696.5
40 0.00 2.15 0.00 1.21 -16.42 262.55 22.17 228.80 0.4830 889.0 665.4
41 0.00 1.12 0.00 0.60 -6.96 261.52 21.14 246.31 0.3926 917.0 646.1
42 0.00 1.12 0.00 0.59 -1.45 261.31 20.92 260.24 0.3638 763.0 534.5
43 0.00 1.29 0.00 0.75 -20.67 262.69 22.31 222.60 0.5268 695.0 548.0
44 0.00 1.54 0.00 0.84 -10.91 261.08 20.69 237.07 0.4152 821.0 778.5
45 0.00 1.12 0.00 0.61 -13.36 261.11 20.73 232.30 0.4371 767.0 566.1
46 0.00 2.15 0.00 1.17 -11.79 260.92 20.53 235.07 0.4206 774.0 672.2
47 0.00 1.29 0.00 0.74 -20.55 261.75 21.37 221.58 0.5162 665.0 576.6
48 0.00 3.69 0.00 2.01 -12.19 260.69 20.31 234.00 0.4211 977.0 772.3
49 0.00 1.12 0.00 0.61 -11.94 260.67 20.29 234.46 0.4187 932.0 840.3
50 0.00 4.55 0.00 2.63 -21.38 261.26 20.88 219.82 0.5204 720.0 651.1
51 0.00 0.86 0.00 0.49 -20.96 261.00 20.61 220.04 0.5132 840.0 707.2
52 0.00 1.20 0.00 0.69 -21.44 260.62 20.24 218.90 0.5149 815.0 714.4
53 0.00 2.23 0.00 1.31 -23.10 260.84 20.46 217.08 0.5354 506.0 505.3
54 0.00 1.12 0.00 0.61 -13.76 259.04 18.66 228.66 0.4156 808.0 645.1
55 0.00 1.37 0.00 0.74 -12.93 258.94 18.56 230.10 0.4061 908.0 780.1
56 0.00 0.94 0.00 0.52 -17.43 258.93 18.55 222.23 0.4534 657.0 510.2
57 0.00 1.29 0.00 0.74 -22.16 258.97 18.58 215.69 0.5080 880.0 753.3
58 0.00 1.20 0.00 0.64 -11.65 256.82 16.44 229.33 0.3670 960.0 815.4
59 0.00 1.20 0.00 0.66 -17.40 257.07 16.69 219.33 0.4341 760.0 612.0
60 0.00 0.77 0.00 0.41 -11.61 256.50 16.12 228.86 0.3627 830.0 704.2
61 0.00 2.23 0.00 1.25 -20.42 256.98 16.60 214.92 0.4696 766.0 530.0
62 0.00 0.94 0.00 0.52 -16.77 256.62 16.24 219.58 0.4221 819.0 734.5
63 3.60 5.92 1.99 3.27 -18.47 256.68 16.30 217.11 0.4431 942.3 635.0
64 0.00 1.03 0.00 0.54 -9.90 256.07 15.69 231.93 0.3398 -740.0 -626.5
65 0.00 1.46 0.00 0.80 -18.40 256.35 15.97 216.65 0.4392 594.0 446.4
66 0.00 0.60 0.00 0.33 -18.28 256.34 15.96 216.81 0.4375 835.0 679.4
67 0.00 1.03 0.00 0.55 -13.81 255.79 15.41 223.19 0.3786 581.0 635.0
68 0.00 3.86 0.00 2.09 -15.89 255.88 15.49 219.70 0.4040 1095.0 898.0
69 0.00 1.54 0.00 0.85 -18.05 256.06 15.68 216.66 0.4321 928.0 747.2
70 0.00 1.72 0.00 0.93 -16.98 255.77 15.39 217.77 0.4162 739.0 519.0
71 0.00 1.29 0.00 0.74 -23.66 256.20 15.81 209.84 0.5037 665.0 580.1
72 0.00 0.94 0.00 0.50 -13.93 255.26 14.88 221.99 0.3741 -607.0 -525.1
73 0.00 2.06 0.00 1.10 -14.70 255.25 14.87 220.57 0.3832 929.0 825.1
74 0.00 1.20 0.00 0.66 -17.67 255.28 14.90 215.86 0.4200 856.0 755.0
75 0.00 0.77 0.00 0.42 -18.45 254.90 14.52 214.05 0.4265 -638.0 -520.1
76 0.00 1.80 0.00 0.97 -16.62 254.72 14.34 216.40 0.4016 -995.0 -822.0
77 0.00 1.72 0.00 0.95 -20.49 255.02 14.64 211.59 0.4538 751.0 522.4
78 0.00 2.40 0.00 1.28 -14.69 254.49 14.11 219.13 0.3752 891.0 653.3
79 0.00 1.29 0.00 0.69 -16.50 254.55 14.17 216.28 0.3984 -921.0 -759.5
80 0.34 1.03 0.19 0.56 -19.17 254.38 14.00 212.13 0.4313 -783.0 -739.4
81 0.69 1.63 0.38 0.89 -18.63 254.30 13.92 212.71 0.4236 -860.2 -718.9
82 0.00 2.32 0.00 1.22 -13.20 253.83 13.45 220.52 0.3501 -115.0 -118.0
83 0.00 1.97 0.00 1.04 -13.32 253.68 13.30 219.98 0.3500 -37.0 -21.6
84 2.06 468.71 1.09 245.81 -13.11 253.39 13.01 219.77 0.3442 749.0 465.6
85 2.92 -84.00 1.54 -84.00 -13.07 253.20 12.82 219.43 0.3418 719.2 999999
86 60.34 -84.00 31.65 -84.00 -12.70 252.56 12.18 218.73 0.3304 1536.8 999999
87 0.00 0.94 0.00 0.48 -6.67 252.32 11.93 233.18 0.2577 -717.0 -509.2
88 0.00 1.37 0.00 0.70 -6.76 252.17 11.78 232.56 0.2566 -959.0 -796.1
89 2.49 -84.00 1.30 -84.00 -12.21 252.29 11.91 219.08 0.3213 1136.0 999999
90 0.00 1.37 0.00 0.70 -7.45 252.06 11.68 230.21 0.2624 -832.0 -638.4
91 0.00 2.49 0.00 1.28 -7.18 251.96 11.58 230.79 0.2582 -682.0 -595.3
92 0.00 3.52 0.00 1.80 -7.20 251.57 11.18 229.73 0.2534 -925.0 -740.8
93 0.00 2.40 0.00 1.23 -6.84 251.32 10.93 230.21 0.2462 -833.0 -712.6
94 0.00 1.72 0.00 0.93 -19.43 251.60 11.22 206.48 0.4132 -733.0 -564.1
95 0.00 1.03 0.00 0.53 -9.76 251.00 10.61 221.26 0.2765 784.0 563.2
96 0.00 1.89 0.00 0.97 -9.90 249.78 9.40 217.51 0.2653 -745.0 -551.5
97 0.00 1.89 0.00 0.96 -7.91 249.67 9.29 222.35 0.2384 -827.0 -698.2
98 0.00 0.86 0.00 0.44 -10.23 249.58 9.19 216.15 0.2677 -882.0 -704.4
99 0.00 0.86 0.00 0.44 -10.51 249.49 9.11 215.30 0.2706 -874.0 -704.4
100 0.00 0.94 0.00 0.49 -11.26 249.27 8.89 213.06 0.2790 -936.0 -682.5
101 0.00 1.72 0.00 0.87 -8.26 248.86 8.48 218.78 0.2340 -1092.0 -860.8
102 0.00 1.63 0.00 0.82 -5.95 247.80 7.41 222.16 0.1921 -910.0 -676.8
103 0.00 2.23 0.00 1.13 -6.99 247.63 7.25 218.08 0.2040 -813.0 -594.2
104 0.00 0.86 0.00 0.44 -11.89 247.12 6.74 205.24 0.2705 -913.0 -749.3
105 0.00 1.54 0.00 0.80 -12.26 247.10 6.72 204.59 0.2759 -1099.0 -891.1
106 0.00 1.54 0.00 0.79 -12.01 245.75 5.37 200.44 0.2633 -955.0 -722.4
107 0.00 1.20 0.00 0.66 -22.42 245.54 5.16 191.27 0.4268 -681.0 -563.3
108 0.00 1.12 0.00 0.57 -11.72 244.17 3.79 195.02 0.2506 866.0 743.2
109 0.00 5.06 0.00 2.61 -13.41 243.70 3.32 191.82 0.2764 -221.0 -266.4
110 0.00 0.94 0.00 0.48 -11.11 243.59 3.20 193.38 0.2381 796.0 603.1
111 0.34 1.29 0.18 0.66 -12.06 243.51 3.12 192.19 0.2534 1170.2 1021.1
112 1.46 2026.07 0.76 1054.85 -14.55 243.47 3.09 190.26 0.2945 -1137.6 -422.2
113 0.00 2.92 0.00 1.49 -11.23 243.41 3.02 192.54 0.2394 1089.0 842.6
114 0.00 0.86 0.00 0.44 -12.27 243.39 3.00 191.57 0.2566 705.0 597.8
115 13.39 -112.00 6.95 -112.00 -14.89 243.36 2.97 189.67 0.2997 -1281.4 999999
116 3.43 -112.00 1.80 -112.00 -16.38 243.34 2.96 188.83 0.3243 836.1 999999
117 0.00 1.63 0.00 0.83 -12.12 243.29 2.91 191.34 0.2537 921.0 766.6
118 0.00 2.92 0.00 1.49 -11.42 243.26 2.87 191.78 0.2419 1023.0 853.5
119 1.89 -112.00 0.98 -112.00 -14.39 243.23 2.84 189.54 0.2912 -795.5 999999
120 0.00 1.12 0.00 0.57 -12.12 243.14 2.76 190.76 0.2532 642.0 455.4
121 2.06 -112.00 1.07 -112.00 -14.61 243.14 2.75 189.13 0.2945 -1037.8 999999
122 0.00 2.06 0.00 1.09 -18.36 243.19 2.80 187.52 0.3562 662.0 484.5
123 0.00 1.80 0.00 0.92 -11.32 243.04 2.66 191.01 0.2396 893.0 834.3
124 0.86 2.32 0.44 1.18 -11.75 242.93 2.54 190.21 0.2464 -1087.1 -757.5
125 15.62 -112.00 8.11 -112.00 -15.10 242.77 2.39 187.71 0.3018 -1148.1 999999
126 0.00 1.37 0.00 0.70 -11.08 242.74 2.36 189.96 0.2346 894.0 716.2
127 0.00 1.12 0.00 0.57 -10.93 242.71 2.33 189.94 0.2320 889.0 480.8
128 2.15 -112.00 1.10 -112.00 -12.97 242.69 2.31 188.53 0.2662 -118.4 999999
129 27.55 -112.00 14.26 -112.00 -14.51 242.52 2.14 187.16 0.2915 -1626.3 999999
130 0.43 1.63 0.22 0.83 -11.26 242.44 2.06 188.59 0.2368 922.0 804.1
131 0.00 0.51 0.00 0.26 -11.78 242.32 1.94 187.80 0.2453 -338.0 -308.7
132 15.54 -112.00 8.05 -112.00 -14.85 242.31 1.93 186.33 0.2967 -1515.0 999999
133 0.00 1.12 0.00 0.57 -11.35 242.29 1.91 187.91 0.2380 861.0 736.2
134 13.90 -112.00 7.22 -112.00 -15.16 242.25 1.87 186.02 0.3018 -1280.7 999999
135 4.38 -112.00 2.25 -112.00 -13.03 242.12 1.73 186.39 0.2660 -1258.9 999999
136 0.00 0.69 0.00 0.34 -6.91 241.88 1.50 189.30 0.1615 -853.0 -726.5
137 1.29 4.21 0.66 2.15 -11.56 241.87 1.48 186.08 0.2407 875.4 596.1
138 0.26 -112.00 0.13 -112.00 -14.67 241.85 1.47 184.88 0.2929 -1292.0 999999
139 0.00 1.37 0.00 0.70 -11.75 241.75 1.36 185.51 0.2436 568.0 493.1
140 2.15 -112.00 1.12 -112.00 -15.41 241.73 1.35 184.29 0.3051 -1179.1 999999
141 1.63 -112.00 0.85 -112.00 -15.10 241.70 1.32 184.27 0.2999 -1293.5 999999
142 0.00 1.12 0.00 0.60 -19.54 241.60 1.22 183.10 0.3728 944.0 721.5
143 4.72 -112.00 2.45 -112.00 -14.88 241.55 1.16 183.82 0.2961 -1323.1 999999
144 3.26 -112.00 1.69 -112.00 -15.26 241.49 1.10 183.54 0.3023 -1231.0 999999
145 0.00 0.94 0.00 0.48 -11.81 241.47 1.09 184.40 0.2442 616.0 356.7
146 2.06 -112.00 1.06 -112.00 -13.86 241.45 1.07 183.74 0.2789 -1248.4 999999
147 0.00 1.29 0.00 0.66 -11.93 241.32 0.94 183.76 0.2461 437.0 299.3
148 0.00 1.37 0.00 0.68 -1.78 241.32 0.93 193.14 0.0720 -804.0 -583.7
149 0.69 -112.00 0.36 -112.00 -15.38 241.30 0.92 182.93 0.3041 -1060.5 999999
150 43.86 -112.00 22.66 -112.00 -14.29 241.27 0.89 183.02 0.2860 -1451.6 999999
151 188.74 -112.00 98.81 -112.00 -16.63 241.21 0.83 182.46 0.3248 -1607.3 999999
152 0.00 1.20 0.00 0.60 -4.01 241.11 0.72 186.63 0.1098 -845.0 -582.2
153 2.57 -112.00 1.34 -112.00 -15.57 240.78 0.40 181.25 0.3069 -1127.6 999999
154 4.81 -112.00 2.48 -112.00 -14.32 240.75 0.37 181.25 0.2861 -927.0 999999
155 1.46 -112.00 0.75 -112.00 -14.54 240.66 0.27 180.92 0.2898 -901.6 999999
156 4.03 -112.00 2.10 -112.00 -16.03 240.38 -0.00 179.99 0.3146 -1225.8 999999
157 3.00 -112.00 1.57 -112.00 -15.88 240.16 -0.22 179.33 0.3121 -1189.3 999999
158 36.13 -112.00 18.72 -112.00 -14.82 240.04 -0.34 178.88 0.2944 1236.3 999999
159 0.00 1.63 0.00 0.90 -23.75 239.98 -0.40 179.16 0.4398 -846.0 -719.0
160 0.00 1.20 0.00 0.63 -18.10 239.51 -0.88 177.60 0.3492 283.0 247.8
161 0.51 5.92 0.27 3.05 -13.49 239.10 -1.28 175.42 0.2729 -655.5 -494.4
162 0.69 2.66 0.35 1.37 -14.14 239.01 -1.37 175.28 0.2839 1138.5 902.5
163 0.00 1.97 0.00 1.04 -17.28 238.98 -1.40 176.00 0.3362 -739.0 -402.3
164 0.00 0.69 0.00 0.36 -17.16 238.83 -1.55 175.53 0.3343 -588.0 -528.4
165 0.00 0.86 0.00 0.45 -16.06 238.84 -1.54 175.28 0.3162 -738.0 -629.7
166 0.00 1.63 0.00 0.85 -14.82 238.76 -1.63 174.65 0.2956 697.0 519.9
167 0.00 1.03 0.00 0.55 -19.06 238.09 -2.29 174.05 0.3664 -909.0 -765.0
168 0.00 0.86 0.00 0.48 -25.78 237.97 -2.42 175.37 0.4729 -720.0 -554.0
169 0.00 1.80 0.00 0.97 -20.98 237.17 -3.21 172.43 0.3991 -899.0 -764.4
170 0.00 0.69 0.00 0.37 -20.66 237.02 -3.37 171.95 0.3943 -627.0 -587.6
171 0.00 0.94 0.00 0.49 -13.86 237.12 -3.27 168.71 0.2837 -646.0 -482.1
172 0.00 0.51 0.00 0.26 -13.12 237.01 -3.38 167.77 0.2719 -715.0 -640.3
173 0.00 1.20 0.00 0.65 -21.43 236.77 -3.61 171.69 0.4071 -907.0 -712.5
174 0.00 2.49 0.00 1.33 -20.05 236.68 -3.70 170.91 0.3853 -749.0 -694.4
175 0.00 1.29 0.00 0.69 -20.37 236.68 -3.71 171.03 0.3905 -1108.0 -845.5
176 0.00 0.94 0.00 0.52 -22.76 236.58 -3.80 171.76 0.4286 -715.0 -570.5
177 0.00 0.43 0.00 0.23 -20.79 236.32 -4.07 170.37 0.3981 -500.0 -566.8
178 0.00 0.94 0.00 0.51 -21.11 236.24 -4.14 170.34 0.4033 -572.0 -409.5
179 0.00 0.77 0.00 0.42 -22.77 236.13 -4.26 170.80 0.4296 -681.0 -618.0
180 0.00 1.29 0.00 0.69 -19.69 236.16 -4.23 169.47 0.3812 -1006.0 -857.4
181 0.00 1.37 0.00 0.74 -19.73 235.93 -4.45 168.94 0.3824 -873.0 -752.5
182 0.00 1.12 0.00 0.59 -19.06 235.95 -4.43 168.62 0.3717 -775.0 -635.2
183 0.00 1.72 0.00 0.92 -19.86 235.68 -4.71 168.40 0.3852 -766.0 -554.2
184 0.00 1.12 0.00 0.61 -21.95 235.61 -4.77 169.32 0.4184 -750.0 -493.4
185 0.00 1.03 0.00 0.53 -12.60 235.77 -4.62 162.93 0.2687 -841.0 -598.0
186 0.00 1.37 0.00 0.71 -13.62 235.50 -4.88 163.13 0.2863 -803.0 -653.6
187 0.00 1.54 0.00 0.77 -4.82 234.80 -5.58 141.59 0.1568 -934.0 -725.0
188 0.00 1.03 0.00 0.61 -29.76 233.45 -6.93 168.81 0.5419 -537.0 -365.2
189 0.00 0.34 0.00 0.19 -24.65 233.67 -6.71 166.77 0.4660 -600.0 -652.5
190 0.00 3.26 0.00 1.86 -26.54 231.66 -8.73 164.23 0.5016 -910.0 -733.6
191 0.00 1.29 0.00 0.74 -26.34 231.27 -9.11 163.45 0.5003 -837.0 -701.1
192 0.00 2.32 0.00 1.35 -27.41 227.61 -12.77 158.32 0.5334 -825.0 -627.5
193 0.00 4.03 0.00 2.43 -22.72 215.64 -24.74 137.31 0.5715 -375.0 -290.2


  • Proj. U -  Projected umbra area in millionths of solar disc, negative values indicate
    that the umbra consists of fragmented regions which cannot be separated without losing umbral area.
    In this way several spots (intensity minima in the umbra) have a common umbra, e.g. -2 means that
    the given spot shares an umbra with spot No.2, and the common U value is indicated at spot No.2.
  • Proj. WS -  Projected whole spot area in millionths of solar disc, negative values indicate
    that several umbras have a common penumbra, e.g. -7 means that the given umbra shares
    a penumbra with umbra No.7, and the WS value is indicated at No.7.
  • Corr. U -  Corrected umbra area in millionths of solar hemisphere, for negative values see above
  • Corr. WS -  Corrected whole spot area in millionths of solar hemisphere, for negative values see above
  • B -  Heliographic latitude B; positive: North, negative: South
  • L -  Heliographic longitude L
  • LCM -  Longitudinal distance from the Sun's central meridian
  • Pos. angle -  Position angle
  • r -  Distance from the centre of Sun's disc in terms of Sun's radius
  • MU -  Mean magnetic field within the umbra contour averaged the pixel values with sign.
  • MP -  Mean magnetic field within the penumbra contour averaged the pixel values with sign.