SDO HMI 2014-05-12 16:00:37 UT
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!)
| group | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
| 158.78 | 695.92 | 90.43 | 392.90 | -14.72 | 227.47 | -26.13 | 116.26 | 0.4754 | 81.2 | 78.9 | |
|
previous
or next observation for the same group /
back to the solar disc SDO HMI 2014-05-12 16:00:37 UT
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!) |
| spot | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
| 0.00 | 0.90 | 0.00 | 0.45 | -8.86 | 250.40 | -3.20 | 151.84 | 0.1173 | 825.0 | 623.1 | |
| 0.00 | 0.90 | 0.00 | 0.45 | -10.26 | 248.84 | -4.76 | 147.34 | 0.1518 | 972.0 | 751.4 | |
| 0.00 | 1.34 | 0.00 | 0.67 | -8.00 | 248.02 | -5.58 | 132.46 | 0.1311 | 935.0 | 765.0 | |
| 0.00 | 1.52 | 0.00 | 0.76 | -7.12 | 248.00 | -5.60 | 126.94 | 0.1217 | -760.0 | -516.3 | |
| 0.00 | 0.90 | 0.00 | 0.45 | -8.27 | 247.49 | -6.11 | 131.41 | 0.1410 | 829.0 | 664.0 | |
| 0.00 | 1.08 | 0.00 | 0.54 | -3.81 | 247.39 | -6.20 | 98.03 | 0.1094 | 809.0 | 627.8 | |
| 0.00 | 1.08 | 0.00 | 0.54 | -8.65 | 246.00 | -7.60 | 127.35 | 0.1651 | 988.0 | 834.2 | |
| 0.00 | 0.81 | 0.00 | 0.41 | -10.54 | 242.87 | -10.73 | 125.99 | 0.2272 | 806.0 | 699.6 | |
| 0.00 | 1.88 | 0.00 | 0.96 | -8.09 | 241.39 | -12.21 | 113.41 | 0.2292 | 1134.0 | 904.5 | |
| 0.00 | 1.26 | 0.00 | 0.67 | -20.27 | 240.52 | -13.08 | 144.61 | 0.3682 | -815.0 | -628.1 | |
| 0.00 | 1.17 | 0.00 | 0.60 | -9.97 | 240.85 | -12.75 | 119.58 | 0.2511 | 874.0 | 681.5 | |
| 0.00 | 2.96 | 0.00 | 1.52 | -9.97 | 240.44 | -13.16 | 118.82 | 0.2571 | 916.0 | 711.8 | |
| 0.00 | 2.24 | 0.00 | 1.15 | -9.38 | 240.30 | -13.29 | 116.55 | 0.2547 | 787.0 | 605.1 | |
| 0.00 | 0.99 | 0.00 | 0.51 | -14.47 | 239.75 | -13.85 | 130.94 | 0.3081 | 834.0 | 652.2 | |
| 0.00 | 1.17 | 0.00 | 0.61 | -14.19 | 239.35 | -14.25 | 129.44 | 0.3103 | 797.0 | 534.6 | |
| 0.00 | 1.43 | 0.00 | 0.74 | -7.71 | 237.97 | -15.63 | 107.61 | 0.2814 | 649.0 | 552.8 | |
| 0.00 | 1.08 | 0.00 | 0.57 | -16.00 | 236.08 | -17.52 | 128.23 | 0.3700 | 756.0 | 552.8 | |
| 0.00 | 1.34 | 0.00 | 0.71 | -11.40 | 236.05 | -17.55 | 116.78 | 0.3326 | 879.0 | 660.5 | |
| 0.00 | 2.69 | 0.00 | 1.42 | -12.99 | 235.90 | -17.70 | 120.82 | 0.3464 | 1066.0 | 842.0 | |
| 0.00 | 2.69 | 0.00 | 1.46 | -19.43 | 235.25 | -18.35 | 133.94 | 0.4140 | 689.0 | 453.9 | |
| 0.00 | 1.08 | 0.00 | 0.56 | -7.95 | 235.98 | -17.62 | 106.62 | 0.3142 | 783.0 | 592.3 | |
| 0.00 | 1.52 | 0.00 | 0.79 | -6.86 | 235.99 | -17.60 | 103.21 | 0.3098 | 766.0 | 558.1 | |
| 0.00 | 0.99 | 0.00 | 0.52 | -9.55 | 235.09 | -18.51 | 110.57 | 0.3358 | 845.0 | 722.9 | |
| 0.00 | 1.61 | 0.00 | 0.85 | -9.88 | 234.91 | -18.69 | 111.33 | 0.3404 | 865.0 | 728.6 | |
| 0.00 | 1.43 | 0.00 | 0.76 | -10.09 | 234.80 | -18.80 | 111.81 | 0.3432 | 859.0 | 726.0 | |
| 4.21 | 9.05 | 2.23 | 4.80 | -11.50 | 234.51 | -19.09 | 115.27 | 0.3559 | 1053.6 | 745.1 | |
| 0.00 | 6.28 | 0.00 | 3.32 | -10.42 | 234.48 | -19.11 | 112.41 | 0.3498 | 995.0 | 724.7 | |
| 0.00 | 1.43 | 0.00 | 0.76 | -10.24 | 234.30 | -19.30 | 111.73 | 0.3516 | 846.0 | 691.6 | |
| 0.00 | 2.96 | 0.00 | 1.56 | -9.78 | 234.30 | -19.30 | 110.49 | 0.3492 | 696.0 | 665.5 | |
| 0.00 | 1.26 | 0.00 | 0.66 | -10.05 | 234.25 | -19.35 | 111.18 | 0.3514 | 685.0 | 597.9 | |
| 0.00 | 0.90 | 0.00 | 0.48 | -11.21 | 234.17 | -19.43 | 114.18 | 0.3592 | 674.0 | 548.7 | |
| 0.00 | 1.43 | 0.00 | 0.75 | -4.95 | 234.43 | -19.17 | 96.57 | 0.3308 | 901.0 | 672.6 | |
| 0.00 | 3.50 | 0.00 | 1.86 | -11.64 | 234.04 | -19.56 | 115.15 | 0.3638 | 855.0 | 579.7 | |
| 0.00 | 1.34 | 0.00 | 0.71 | -9.74 | 233.97 | -19.62 | 110.10 | 0.3540 | 761.0 | 552.6 | |
| 0.00 | 0.99 | 0.00 | 0.52 | -4.80 | 234.21 | -19.39 | 96.04 | 0.3342 | 780.0 | 621.5 | |
| 0.00 | 0.63 | 0.00 | 0.34 | -15.39 | 233.44 | -20.15 | 123.32 | 0.3992 | 735.0 | 553.7 | |
| 0.00 | 1.34 | 0.00 | 0.71 | -6.10 | 234.06 | -19.53 | 99.85 | 0.3389 | 931.0 | 724.5 | |
| 0.00 | 1.43 | 0.00 | 0.77 | -14.03 | 233.48 | -20.12 | 120.31 | 0.3883 | 907.0 | 818.5 | |
| 0.00 | 0.63 | 0.00 | 0.34 | -12.52 | 233.44 | -20.15 | 116.71 | 0.3781 | -665.0 | -549.3 | |
| 0.00 | 0.99 | 0.00 | 0.52 | -10.13 | 233.59 | -20.01 | 110.81 | 0.3619 | -689.0 | -467.6 | |
| 0.00 | 0.27 | 0.00 | 0.15 | -20.62 | 232.35 | -21.25 | 132.12 | 0.4592 | 553.0 | 553.3 | |
| 0.00 | 0.63 | 0.00 | 0.34 | -12.30 | 233.16 | -20.43 | 115.89 | 0.3808 | 844.0 | 632.4 | |
| 0.00 | 0.63 | 0.00 | 0.33 | -5.15 | 233.55 | -20.05 | 96.90 | 0.3454 | 882.0 | 800.4 | |
| 0.00 | 2.15 | 0.00 | 1.17 | -14.97 | 232.72 | -20.88 | 121.56 | 0.4058 | 568.0 | 471.5 | |
| 0.00 | 1.43 | 0.00 | 0.76 | -5.32 | 233.25 | -20.35 | 97.33 | 0.3506 | 628.0 | 493.7 | |
| 0.00 | 1.43 | 0.00 | 0.78 | -15.20 | 231.78 | -21.82 | 121.03 | 0.4203 | 738.0 | 546.9 | |
| 0.00 | 1.97 | 0.00 | 1.06 | -10.24 | 231.34 | -22.26 | 109.31 | 0.3967 | -922.0 | -786.8 | |
| 0.00 | 3.05 | 0.00 | 1.65 | -10.35 | 230.86 | -22.74 | 109.25 | 0.4044 | -742.0 | -700.2 | |
| 0.00 | 1.88 | 0.00 | 1.02 | -11.26 | 230.49 | -23.11 | 111.10 | 0.4144 | -1033.0 | -795.9 | |
| 0.00 | 0.99 | 0.00 | 0.54 | -10.22 | 230.04 | -23.56 | 108.37 | 0.4163 | -673.0 | -604.5 | |
| 38.28 | 215.86 | 21.17 | 119.40 | -14.45 | 229.52 | -24.08 | 117.26 | 0.4463 | 1227.8 | 435.2 | |
| 0.00 | 0.63 | 0.00 | 0.34 | -11.40 | 229.60 | -24.00 | 110.77 | 0.4282 | -675.0 | -605.7 | |
| 1.34 | -51.00 | 0.75 | -51.00 | -14.50 | 229.07 | -24.53 | 116.97 | 0.4529 | 827.6 | 999999 | |
| 3.68 | -51.00 | 2.04 | -51.00 | -14.37 | 228.84 | -24.76 | 116.52 | 0.4553 | 857.7 | 999999 | |
| 0.00 | 2.60 | 0.00 | 1.45 | -14.95 | 228.70 | -24.90 | 117.59 | 0.4608 | 256.0 | 407.7 | |
| 0.00 | 0.99 | 0.00 | 0.54 | -11.29 | 229.00 | -24.60 | 110.13 | 0.4366 | -849.0 | -735.1 | |
| 0.00 | 1.43 | 0.00 | 0.80 | -15.73 | 228.46 | -25.14 | 118.90 | 0.4690 | 618.0 | 517.0 | |
| 1.52 | -51.00 | 0.85 | -51.00 | -14.21 | 228.62 | -24.98 | 116.02 | 0.4574 | 667.9 | 999999 | |
| 0.00 | 1.08 | 0.00 | 0.60 | -13.07 | 228.71 | -24.88 | 113.74 | 0.4496 | -689.0 | -571.0 | |
| 7.89 | 67.50 | 4.41 | 37.91 | -14.60 | 228.19 | -25.41 | 116.46 | 0.4657 | 861.1 | 184.4 | |
| 0.00 | 1.08 | 0.00 | 0.59 | -11.19 | 228.43 | -25.17 | 109.53 | 0.4445 | -895.0 | -778.2 | |
| 16.49 | -60.00 | 9.26 | -60.00 | -14.87 | 227.77 | -25.83 | 116.67 | 0.4731 | 769.3 | 999999 | |
| 0.00 | 1.34 | 0.00 | 0.75 | -14.00 | 227.74 | -25.85 | 114.93 | 0.4685 | 261.0 | 211.2 | |
| 0.00 | 1.70 | 0.00 | 0.94 | -8.98 | 228.14 | -25.46 | 104.52 | 0.4404 | 810.0 | 663.1 | |
| 2.42 | -60.00 | 1.37 | -60.00 | -15.26 | 227.27 | -26.33 | 117.03 | 0.4823 | 526.9 | 999999 | |
| 0.00 | 1.34 | 0.00 | 0.77 | -18.66 | 226.74 | -26.86 | 122.81 | 0.5113 | 663.0 | 603.3 | |
| 0.63 | 4.03 | 0.36 | 2.31 | -17.50 | 226.76 | -26.84 | 120.77 | 0.5032 | 804.3 | 742.8 | |
| 0.00 | 1.34 | 0.00 | 0.76 | -14.48 | 226.99 | -26.61 | 115.31 | 0.4817 | -334.0 | -264.6 | |
| 0.00 | 4.03 | 0.00 | 2.26 | -12.85 | 227.15 | -26.45 | 112.19 | 0.4708 | -854.0 | -800.9 | |
| 0.00 | 1.17 | 0.00 | 0.67 | -17.58 | 226.49 | -27.11 | 120.71 | 0.5072 | 773.0 | 709.6 | |
| 0.00 | 1.08 | 0.00 | 0.60 | -11.44 | 227.20 | -26.40 | 109.32 | 0.4636 | -674.0 | -467.6 | |
| 0.00 | 1.08 | 0.00 | 0.62 | -17.27 | 226.40 | -27.20 | 120.07 | 0.5063 | 404.0 | 401.2 | |
| 0.00 | 3.85 | 0.00 | 2.16 | -12.57 | 226.94 | -26.66 | 111.48 | 0.4725 | -1009.0 | -891.3 | |
| 0.00 | 1.17 | 0.00 | 0.67 | -17.42 | 226.23 | -27.37 | 120.21 | 0.5095 | 668.0 | 584.4 | |
| 0.00 | 2.60 | 0.00 | 1.50 | -17.67 | 226.08 | -27.51 | 120.53 | 0.5130 | 677.0 | 520.6 | |
| 0.00 | 1.43 | 0.00 | 0.82 | -16.14 | 226.29 | -27.31 | 117.93 | 0.5008 | 591.0 | 501.1 | |
| 0.00 | 1.34 | 0.00 | 0.76 | -13.91 | 226.46 | -27.13 | 113.83 | 0.4859 | -918.0 | -728.7 | |
| 0.72 | 9.77 | 0.41 | 5.63 | -17.10 | 225.71 | -27.88 | 119.22 | 0.5142 | 682.8 | 554.4 | |
| 0.00 | 1.08 | 0.00 | 0.61 | -15.36 | 225.95 | -27.65 | 116.22 | 0.5008 | -930.0 | -742.2 | |
| 0.00 | 1.08 | 0.00 | 0.61 | -15.23 | 225.97 | -27.63 | 116.00 | 0.4999 | -981.0 | -712.3 | |
| 2.24 | 5.29 | 1.28 | 3.01 | -14.27 | 226.06 | -27.53 | 114.26 | 0.4934 | -1019.2 | -791.1 | |
| 0.00 | 2.24 | 0.00 | 1.27 | -12.89 | 226.21 | -27.39 | 111.66 | 0.4845 | -991.0 | -832.7 | |
| 0.00 | 1.43 | 0.00 | 0.81 | -12.61 | 226.06 | -27.53 | 111.02 | 0.4852 | -865.0 | -737.4 | |
| 0.00 | 2.24 | 0.00 | 1.28 | -15.13 | 225.70 | -27.90 | 115.63 | 0.5030 | -909.0 | -645.2 | |
| 0.36 | 4.12 | 0.20 | 2.33 | -12.45 | 225.91 | -27.69 | 110.62 | 0.4868 | -925.8 | -704.0 | |
| 2.42 | 35.68 | 1.38 | 20.29 | -13.24 | 225.67 | -27.93 | 112.03 | 0.4938 | -1055.4 | -623.9 | |
| 1.08 | 5.38 | 0.62 | 3.08 | -14.41 | 225.51 | -28.08 | 114.16 | 0.5017 | -1001.9 | -849.4 | |
| 3.85 | -86.00 | 2.20 | -86.00 | -13.58 | 225.59 | -28.01 | 112.63 | 0.4965 | -1084.6 | 999999 | |
| 2.24 | -86.00 | 1.28 | -86.00 | -13.36 | 225.55 | -28.05 | 112.19 | 0.4961 | -1072.7 | 999999 | |
| 0.36 | -87.00 | 0.21 | -87.00 | -14.57 | 225.35 | -28.25 | 114.34 | 0.5048 | -1066.2 | 999999 | |
| 0.99 | 46.08 | 0.57 | 26.55 | -15.40 | 225.12 | -28.48 | 115.72 | 0.5123 | -1024.4 | -590.3 | |
| 5.20 | -91.00 | 3.01 | -91.00 | -15.99 | 224.99 | -28.60 | 116.70 | 0.5172 | -792.8 | 999999 | |
| 10.40 | -91.00 | 6.01 | -91.00 | -15.74 | 224.96 | -28.64 | 116.23 | 0.5163 | -1001.1 | 999999 | |
| 0.00 | 6.36 | 0.00 | 3.72 | -17.70 | 224.63 | -28.96 | 119.46 | 0.5319 | -755.0 | -692.3 | |
| 0.00 | 1.97 | 0.00 | 1.14 | -16.29 | 224.87 | -28.72 | 117.17 | 0.5206 | -808.0 | -650.9 | |
| 0.00 | 0.99 | 0.00 | 0.58 | -18.16 | 224.51 | -29.08 | 120.17 | 0.5364 | -700.0 | -523.5 | |
| 0.54 | 2.06 | 0.31 | 1.19 | -14.62 | 225.02 | -28.58 | 114.23 | 0.5095 | -965.3 | -822.1 | |
| 0.45 | 1.88 | 0.26 | 1.08 | -13.73 | 225.15 | -28.45 | 112.63 | 0.5034 | -808.2 | -675.3 | |
| 0.00 | 0.99 | 0.00 | 0.56 | -12.34 | 225.29 | -28.31 | 110.05 | 0.4952 | -753.0 | -632.5 | |
| 1.26 | 3.50 | 0.73 | 2.04 | -17.41 | 224.39 | -29.20 | 118.79 | 0.5333 | -834.1 | -711.8 | |
| 0.00 | 1.17 | 0.00 | 0.68 | -17.10 | 224.45 | -29.15 | 118.29 | 0.5308 | -505.0 | -419.5 | |
| 0.00 | 2.24 | 0.00 | 1.29 | -14.71 | 224.80 | -28.80 | 114.24 | 0.5131 | -845.0 | -657.7 | |
| 0.00 | 1.61 | 0.00 | 0.92 | -12.76 | 224.88 | -28.72 | 110.64 | 0.5027 | -777.0 | -657.9 | |
| 5.02 | 21.69 | 2.90 | 12.54 | -14.42 | 224.55 | -29.05 | 113.56 | 0.5150 | -966.5 | -720.9 | |
| 0.00 | 0.36 | 0.00 | 0.21 | -18.65 | 223.80 | -29.80 | 120.46 | 0.5484 | -691.0 | -643.8 | |
| 6.10 | -104.00 | 3.53 | -104.00 | -14.63 | 224.41 | -29.19 | 113.87 | 0.5180 | -981.7 | 999999 | |
| 0.00 | 0.36 | 0.00 | 0.21 | -12.67 | 224.68 | -28.92 | 110.35 | 0.5052 | -671.0 | -605.5 | |
| 1.26 | -104.00 | 0.73 | -104.00 | -14.79 | 224.28 | -29.32 | 114.06 | 0.5205 | -834.3 | 999999 | |
| 0.00 | 1.88 | 0.00 | 1.12 | -19.20 | 223.20 | -30.39 | 120.95 | 0.5592 | -667.0 | -663.3 | |
| 0.00 | 1.26 | 0.00 | 0.72 | -10.97 | 224.42 | -29.18 | 106.95 | 0.5023 | -674.0 | -572.9 | |
| 5.11 | 7.35 | 3.06 | 4.40 | -19.55 | 222.98 | -30.62 | 121.35 | 0.5641 | -934.0 | -715.2 | |
| 0.00 | 2.69 | 0.00 | 1.56 | -14.43 | 223.79 | -29.80 | 113.13 | 0.5255 | -867.0 | -597.1 | |
| 15.24 | 23.22 | 8.90 | 13.57 | -14.89 | 223.47 | -30.13 | 113.76 | 0.5321 | -975.4 | -586.1 | |
| 0.00 | 1.43 | 0.00 | 0.84 | -15.63 | 223.13 | -30.46 | 114.86 | 0.5402 | -621.0 | -577.3 | |
| 17.48 | 68.76 | 10.40 | 40.88 | -17.30 | 222.61 | -30.98 | 117.40 | 0.5557 | 1077.9 | 379.1 | |
| 0.00 | 2.15 | 0.00 | 1.30 | -19.68 | 222.05 | -31.55 | 120.91 | 0.5764 | -793.0 | -622.0 | |
| 0.00 | 0.81 | 0.00 | 0.47 | -14.88 | 222.96 | -30.63 | 113.44 | 0.5389 | -458.0 | -357.9 | |
| 0.00 | 0.81 | 0.00 | 0.50 | -22.82 | 221.05 | -32.55 | 125.01 | 0.6077 | -673.0 | -539.1 | |
| 0.00 | 1.97 | 0.00 | 1.16 | -14.71 | 222.62 | -30.97 | 112.96 | 0.5427 | -593.0 | -460.5 | |
| 0.00 | 1.61 | 0.00 | 0.96 | -15.29 | 222.20 | -31.40 | 113.73 | 0.5511 | -754.0 | -594.0 | |
| 0.00 | 1.34 | 0.00 | 0.82 | -19.36 | 220.83 | -32.77 | 119.61 | 0.5895 | -742.0 | -572.3 | |
| 0.00 | 1.17 | 0.00 | 0.69 | -13.14 | 221.66 | -31.94 | 109.70 | 0.5493 | -581.0 | -517.3 | |
| 0.00 | 2.15 | 0.00 | 1.27 | -12.83 | 221.52 | -32.08 | 109.08 | 0.5500 | -699.0 | -645.3 | |
| 0.00 | 1.61 | 0.00 | 0.99 | -18.81 | 220.27 | -33.33 | 118.40 | 0.5935 | -693.0 | -656.2 | |
| 0.00 | 1.08 | 0.00 | 0.65 | -15.99 | 220.62 | -32.98 | 114.06 | 0.5752 | -694.0 | -578.8 | |
| 0.00 | 1.43 | 0.00 | 0.87 | -15.40 | 220.47 | -33.13 | 112.99 | 0.5745 | -598.0 | -443.2 | |
| 0.00 | 0.63 | 0.00 | 0.40 | -21.98 | 218.52 | -35.08 | 122.12 | 0.6316 | -680.0 | -622.7 | |
| 0.00 | 1.70 | 0.00 | 1.04 | -14.66 | 219.70 | -33.90 | 111.39 | 0.5817 | -648.0 | -512.2 | |
| 0.00 | 0.90 | 0.00 | 0.58 | -22.02 | 217.74 | -35.86 | 121.72 | 0.6407 | -699.0 | -612.1 | |
| 0.00 | 0.99 | 0.00 | 0.62 | -17.75 | 217.36 | -36.24 | 115.19 | 0.6244 | -518.0 | -440.5 | |
| 0.00 | 0.54 | 0.00 | 0.35 | -19.85 | 215.73 | -37.87 | 117.51 | 0.6533 | -566.0 | -496.0 | |
| 0.00 | 1.52 | 0.00 | 1.00 | -20.05 | 215.30 | -38.30 | 117.61 | 0.6593 | -652.0 | -579.1 | |
| 0.00 | 2.24 | 0.00 | 1.48 | -20.43 | 215.15 | -38.45 | 118.07 | 0.6627 | -518.0 | -468.4 | |
| 0.00 | 1.79 | 0.00 | 1.24 | -23.80 | 213.42 | -40.17 | 121.86 | 0.6973 | -593.0 | -507.4 | |
| 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. | |