气球的mask-rcnn转coco的数据集，可直接使用最新的mmdetection框架去训练，测试效果好

{"images": [{"id": 0, "file_name": "34020010494_e5cb88e1c4_k.jpg", "height": 1536, "width": 2048}, {"id": 1, "file_name": "25899693952_7c8b8b9edc_k.jpg", "height": 1365, "width": 2048}, {"id": 2, "file_name": "24362039530_b151b41a52_k.jpg", "height": 2048, "width": 1536}, {"id": 3, "file_name": "18849792632_aad23ad513_k.jpg", "height": 2048, "width": 1536}, {"id": 4, "file_name": "17178818589_16e58fc1e5_k.jpg", "height": 1536, "width": 2048}, {"id": 5, "file_name": "17156759330_5af4f5a5b8_k.jpg", "height": 1363, "width": 2048}, {"id": 6, "file_name": "16435593892_2aa8118f4a_k.jpg", "height": 2048, "width": 1895}, {"id": 7, "file_name": "15717689633_5f7f78c28e_k.jpg", "height": 1536, "width": 2048}, {"id": 8, "file_name": "15331928994_d5b82eb368_k.jpg", "height": 2048, "width": 1365}, {"id": 9, "file_name": "15290896925_884ab33fd3_k.jpg", "height": 1356, "width": 2048}, {"id": 10, "file_name": "14666848163_8be8e37562_k.jpg", "height": 2048, "width": 1357}, {"id": 11, "file_name": "14321263043_b76ef054d3_k.jpg", "height": 1356, "width": 2048}, {"id": 12, "file_name": "12288446656_2c6a90e6f5_k.jpg", "height": 1835, "width": 2048}, {"id": 13, "file_name": "12288355124_5e340d3de3_k.jpg", "height": 1536, "width": 2048}, {"id": 14, "file_name": "12288043903_fe1ea17a4e_k.jpg", "height": 1594, "width": 2048}, {"id": 15, "file_name": "12037308314_e16fb3a0f7_k.jpg", "height": 1625, "width": 2048}, {"id": 16, "file_name": "10464445726_6f1e3bbe6a_k.jpg", "height": 2019, "width": 2048}, {"id": 17, "file_name": "9330497995_4cf0438cb6_k.jpg", "height": 1421, "width": 2048}, {"id": 18, "file_name": "9210739293_2b0e0d991e_k.jpg", "height": 2048, "width": 1365}, {"id": 19, "file_name": "8758393087_76fcd56bd3_k.jpg", "height": 1365, "width": 2048}, {"id": 20, "file_name": "8436015314_3a678c1005_k.jpg", "height": 1365, "width": 2048}, {"id": 21, "file_name": "7488015492_0583857ca0_k.jpg", "height": 1429, "width": 2048}, {"id": 22, "file_name": "7308740338_591f27b631_k.jpg", "height": 1536, "width": 2048}, {"id": 23, "file_name": "7178882742_f090f3ce56_k.jpg", "height": 1360, "width": 2048}, {"id": 24, "file_name": "6483318883_21facf57cd_b.jpg", "height": 683, "width": 1024}, {"id": 25, "file_name": "5674044810_2d9e2243ff_b.jpg", "height": 1024, "width": 818}, {"id": 26, "file_name": "5560377994_cb597a4af5_b.jpg", "height": 956, "width": 1024}, {"id": 27, "file_name": "5253122239_38b1e7f61c_b.jpg", "height": 768, "width": 1024}, {"id": 28, "file_name": "5178670692_63a4365c9c_b.jpg", "height": 1024, "width": 683}, {"id": 29, "file_name": "5013250607_26359229b6_b.jpg", "height": 681, "width": 1024}, {"id": 30, "file_name": "4955354786_337a598e4a_b.jpg", "height": 683, "width": 1024}, {"id": 31, "file_name": "4887227769_acd2e6127d_b.jpg", "height": 768, "width": 1024}, {"id": 32, "file_name": "4864857993_edb62f16ef_b.jpg", "height": 683, "width": 1024}, {"id": 33, "file_name": "4552737035_3a0a4105fb_b.jpg", "height": 683, "width": 1024}, {"id": 34, "file_name": "4543126482_92254ef046_b.jpg", "height": 1024, "width": 679}, {"id": 35, "file_name": "4057490235_2ffdf7d68b_b.jpg", "height": 1024, "width": 769}, {"id": 36, "file_name": "3945575930_ce99a7e98d_b.jpg", "height": 725, "width": 1024}, {"id": 37, "file_name": "3927754171_9011487133_b.jpg", "height": 681, "width": 1024}, {"id": 38, "file_name": "3646097131_e3e1215843_b.jpg", "height": 681, "width": 1024}, {"id": 39, "file_name": "3342804367_f43682bb80_b.jpg", "height": 1024, "width": 790}, {"id": 40, "file_name": "2937599387_80e7d6e050_b.jpg", "height": 685, "width": 1024}, {"id": 41, "file_name": "2685563244_b0d5f7eb67_b.jpg", "height": 683, "width": 1024}, {"id": 42, "file_name": "2385899600_94b68350af_b.jpg", "height": 576, "width": 1024}, {"id": 43, "file_name": "2354829160_3f65a6bf6f_b.jpg", "height": 681, "width": 1024}, {"id": 44, "file_name": "2311771643_f46392fcc0_b.jpg", "height": 681, "width": 1024}, {"id": 45, "file_name": "1297451346_5b92bdac08_b.jpg", "height": 1024, "width": 768}, {"id": 46, "file_name": "873768102_7d931e5fa3_b.jpg", "height": 856, "width": 1024}, {"id": 47, "file_name": "699765866_abaad7274d_b.jpg", "height": 683, "width": 1024}, {"id": 48, "file_name": "605521662_a470fef77f_b.jpg", "height": 1024, "width": 768}, {"id": 49, "file_name": "518678836_94d58e3839_b.jpg", "height": 683, "width": 1024}, {"id": 50, "file_name": "489752654_777853a0ba_b.jpg", "height": 803, "width": 1024}, {"id": 51, "file_name": "485227412_e335662bb5_b.jpg", "height": 768, "width": 1024}, {"id": 52, "file_name": "351678851_e2aeebdafd_b.jpg", "height": 1024, "width": 768}, {"id": 53, "file_name": "332344155_71be3a3b22_b.jpg", "height": 852, "width": 1024}, {"id": 54, "file_name": "321888854_3723b6f10b_b.jpg", "height": 768, "width": 1024}, {"id": 55, "file_name": "155815494_800fc9aa32_b.jpg", "height": 1024, "width": 768}, {"id": 56, "file_name": "154446334_5d41cd1375_b.jpg", "height": 768, "width": 1024}, {"id": 57, "file_name": "145053828_e0e748717c_b.jpg", "height": 768, "width": 1024}, {"id": 58, "file_name": "126700562_8e27720147_b.jpg", "height": 768, "width": 1024}, {"id": 59, "file_name": "120853323_d4788431b9_b.jpg", "height": 679, "width": 1024}, {"id": 60, "file_name": "53500107_d24b11b3c2_b.jpg", "height": 768, "width": 1024}], "annotations": [{"image_id": 0, "id": 0, "category_id": 0, "bbox": [994, 619, 451, 547], "area": 246697, "segmentation": [[1020.5, 963.5, 1000.5, 899.5, 994.5, 841.5, 1003.5, 787.5, 1023.5, 738.5, 1050.5, 700.5, 1089.5, 663.5, 1134.5, 638.5, 1190.5, 621.5, 1265.5, 619.5, 1321.5, 643.5, 1361.5, 672.5, 1403.5, 720.5, 1428.5, 765.5, 1442.5, 800.5, 1445.5, 860.5, 1441.5, 896.5, 1427.5, 942.5, 1400.5, 990.5, 1361.5, 1035.5, 1316.5, 1079.5, 1269.5, 1112.5, 1228.5, 1129.5, 1198.5, 1134.5, 1207.5, 1144.5, 1210.5, 1153.5, 1190.5, 1166.5, 1177.5, 1166.5, 1172.5, 1150.5, 1174.5, 1136.5, 1170.5, 1129.5, 1153.5, 1122.5, 1127.5, 1112.5, 1104.5, 1084.5, 1061.5, 1037.5, 1032.5, 989.5, 1020.5, 963.5]], "iscrowd": 0}, {"image_id": 1, "id": 1, "category_id": 0, "bbox": [135, 115, 676, 850], "area": 574600, "segmentation": [[586.5, 133.5, 510.5, 116.5, 441.5, 115.5, 389.5, 126.5, 331.5, 149.5, 268.5, 185.5, 196.5, 261.5, 158.5, 339.5, 135.5, 438.5, 156.5, 560.5, 210.5, 664.5, 307.5, 784.5, 403.5, 868.5, 437.5, 893.5, 443.5, 929.5, 425.5, 964.5, 448.5, 964.5, 481.5, 961.5, 506.5, 965.5, 513.5, 958.5, 503.5, 936.5, 511.5, 910.5, 502.5, 896.5, 583.5, 836.5, 669.5, 752.5, 755.5, 636.5, 800.5, 538.5, 811.5, 454.5, 803.5, 392.5, 784.5, 329.5, 755.5, 270.5, 717.5, 220.5, 668.5, 175.5, 620.5, 149.5, 586.5, 133.5]], "iscrowd": 0}, {"image_id": 2, "id": 2, "category_id": 0, "bbox": [579, 487, 341, 434], "area": 147994, "segmentation": [[621.5, 550.5, 641.5, 527.5, 670.5, 507.5, 694.5, 496.5, 723.5, 489.5, 747.5, 487.5, 772.5, 487.5, 810.5, 499.5, 837.5, 516.5, 863.5, 536.5, 882.5, 559.5, 893.5, 577.5, 906.5, 600.5, 918.5, 645.5, 920.5, 680.5, 917.5, 721.5, 911.5, 745.5, 900.5, 774.5, 883.5, 809.5, 859.5, 842.5, 830.5, 867.5, 809.5, 882.5, 786.5, 892.5, 780.5, 893.5, 775.5, 899.5, 778.5, 906.5, 778.5, 916.5, 775.5, 920.5, 768.5, 921.5, 761.5, 916.5, 757.5, 911.5, 756.5, 909.5, 758.5, 905.5, 760.5, 903.5, 762.5, 898.5, 770.5, 896.5, 772.5, 893.5, 762.5, 892.5, 745.5, 889.5, 720.5, 878.5, 702.5, 869.5, 678.5, 854.5, 659.5, 837.5, 635.5, 812.5, 611.5, 782.5, 594.5, 746.5, 586.5, 716.5, 581.5, 679.5, 579.5, 648.5, 586.5, 618.5, 596.5, 591.5, 607.5, 566.5, 621.5, 550.5]], "iscrowd": 0}, {"image_id": 3, "id": 3, "category_id": 0, "bbox": [534, 365, 337, 446], "area": 150302, "segmentation": [[618.5, 385.5, 657.5, 370.5, 688.5, 365.5, 707.5, 365.5, 741.5, 373.5, 760.5, 382.5, 779.5, 390.5, 791.5, 404.5, 820.5, 432.5, 836.5, 451.5, 844.5, 472.5, 860.5, 507.5, 868.5, 541.5, 871.5, 561.5, 871.5, 589.5, 868.5, 612.5, 864.5, 635.5, 854.5, 668.5, 840.5, 698.5, 824.5, 727.5, 809.5, 752.5, 795.5, 764.5, 778.5, 784.5, 759.5, 807.5, 741.5, 804.5, 719.5, 803.5, 699.5, 805.5, 677.5, 811.5, 664.5, 796.5, 641.5, 772.5, 623.5, 754