composte#  Mean image value  Ycent
              1            125    1000.940
              2            175    1002.361
              3            225    1000.367
              4            275     999.362
              5            325     999.851
              6            375    1000.100
              7            425    1000.602
              8            475    1002.949
              9            525    1005.275
             10            575    1007.760
             11            625    1010.382
             12            675    1009.849
             13            725    1006.912
             14            775    1004.450
             15            825    1001.129
             16            875    1000.239
             17            925    1000.329
             18            975    1000.383
             19           1025    1001.138
             20           1075    1001.890
             21           1125    1002.556
             22           1175    1003.987
             23           1225    1004.864
             24           1275    1005.929
             25           1325    1006.043
             26           1375    1003.863
             27           1425    1001.818
             28           1475    1001.572
             29           1525    1003.817
             30           1575    1005.106
             31           1625    1005.668
             32           1675    1005.437
             33           1725    1005.177
             34           1775    1005.417
             35           1825    1003.935
             36           1875    1001.337
             37           1925    1002.916
             38           1975    1005.623
             39           2025    1010.566
             40           2075    1012.555
             41           2125    1008.069
             42           2175    1001.941
             43           2225    1001.503
             44           2275    1002.276
             45           2325    1001.337
             46           2375    1003.081
             47           2425    1010.268
             48           2475    1011.734
             49           2525    1003.821
             50           2575    1002.335
             51           2625    1007.339
             52           2675    1011.227
             53           2725    1011.792
             54           2775    1010.734
             55           2825    1011.213
             56           2875    1007.739
             57           2925    1006.972
             58           2975    1006.384
             59           3025    1005.356
             60           3075    1002.318
             61           3125    1000.304
             62           3175    1000.421
             63           3225    1001.331
             64           3275    1001.417
             65           3325    1001.088
             66           3375    1002.181
             67           3425    1000.559
             68           3475    1000.489
             69           3525    1001.113
             70           3575    1000.359
             71           3625    1000.467
             72           3675    1000.903
             73           3725    1001.963
             74           3775    1001.831
             75           3825    1001.081
             76           3875    1001.272
             77           3925    1001.510
             78           3975    1002.609
             79           4025    1004.251
             80           4075    1006.688
             81           4125    1009.988
             82           4175    1011.963
             83           4225    1012.370
             84           4275    1011.178
             85           4325    1008.902
             86           4375    1004.732
             87           4425    1001.675
             88           4475    1001.067
             89           4525    1000.708