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HICO_train2015_00000001.jpg
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HICO_train2015_00000002.jpg
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HICO_train2015_00000003.jpg
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HICO_train2015_00000004.jpg
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HICO_train2015_00000005.jpg
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HICO_train2015_00000006.jpg
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HICO_train2015_00000007.jpg
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HICO_train2015_00000008.jpg
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HICO_train2015_00000009.jpg
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HICO_train2015_00000010.jpg
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HICO_train2015_00000011.jpg
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HICO_train2015_00000012.jpg
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HICO_train2015_00000013.jpg
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HICO_train2015_00000015.jpg
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HICO_train2015_00000016.jpg
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HICO_train2015_00000017.jpg
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HICO_train2015_00000018.jpg
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HICO_train2015_00000019.jpg
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HICO_train2015_00000020.jpg
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HICO_train2015_00000021.jpg
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HICO_train2015_00000022.jpg
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HICO_train2015_00000023.jpg
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HICO_train2015_00000024.jpg
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HICO_train2015_00000025.jpg
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HICO_train2015_00000026.jpg
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HICO_train2015_00000027.jpg
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HICO_train2015_00000028.jpg
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HICO_train2015_00000029.jpg
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HICO_train2015_00000030.jpg
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HICO_train2015_00000031.jpg
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HICO_train2015_00000032.jpg
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HICO_train2015_00000033.jpg
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HICO_train2015_00000034.jpg
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HICO_train2015_00000035.jpg
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HICO_train2015_00000036.jpg
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HICO_train2015_00000037.jpg
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HICO_train2015_00000038.jpg
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HICO_train2015_00000039.jpg
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HICO_train2015_00000040.jpg
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HICO_train2015_00000041.jpg
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HICO_train2015_00000042.jpg
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HICO_train2015_00000043.jpg
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HICO_train2015_00000044.jpg
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HICO_train2015_00000045.jpg
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HICO_train2015_00000046.jpg
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HICO_train2015_00000047.jpg
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[ { "area": 46392.75, "bbox": [ 212, 76.5, 130.5, 355.5 ], "category_id": 1, "id": 224, "iscrowd": 0, "segmentation": [] }, { "area": 63274.5, "bbox": [ 37.5, 84.5, 193.5, 327 ], "category_id": 20, "id": 225, "iscr...
[ { "id": 171, "object_id": 225, "predicate_id": 26, "subject_id": 224 }, { "id": 172, "object_id": 225, "predicate_id": 64, "subject_id": 224 } ]
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HICO_train2015_00000101.jpg
[ { "area": 1664, "bbox": [ 354, 157, 26, 64 ], "category_id": 1, "id": 226, "iscrowd": 0, "segmentation": [] }, { "area": 66080.5, "bbox": [ 143.5, 101.5, 283, 233.5 ], "category_id": 9, "id": 227, "iscrowd": 0, ...
[ { "id": 173, "object_id": 227, "predicate_id": 75, "subject_id": 226 }, { "id": 174, "object_id": 227, "predicate_id": 92, "subject_id": 226 } ]
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HICO_train2015_00000102.jpg
[ { "area": 53395, "bbox": [ 454, 6, 181, 295 ], "category_id": 1, "id": 228, "iscrowd": 0, "segmentation": [] }, { "area": 8736, "bbox": [ 547, 259, 91, 96 ], "category_id": 64, "id": 229, "iscrowd": 0, "segme...
[ { "id": 175, "object_id": 229, "predicate_id": 72, "subject_id": 228 } ]
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HICO_train2015_00000103.jpg
[ { "area": 76608, "bbox": [ 2, 188, 288, 266 ], "category_id": 1, "id": 230, "iscrowd": 0, "segmentation": [] }, { "area": 79502, "bbox": [ 2, 213, 313, 254 ], "category_id": 58, "id": 231, "iscrowd": 0, "segm...
[ { "id": 176, "object_id": 231, "predicate_id": 53, "subject_id": 230 } ]
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HICO-DET (COCO format)

The HICO-DET human-object interaction benchmark (Chao et al., WACV 2018) as a scene-graph dataset in COCO format: object boxes, and each annotated interaction as a directed (person, predicate, object) relation. It is the HICO-DET data RelateAnything trains and evaluates on (the hicodet pack of maelic/OV-SGG-Bench), in the layout of maelic/PSG-coco-format and maelic/VG150-coco-format.

Statistics

Split Images Object annotations Relations
train 37 633 86 799 64 929
test 9 546 22 843 18 846

Layout

data/train-*.parquet, data/test-*.parquet   image, image_id, width, height, file_name, objects, relations
annotations/{train,test}.json               the same annotations as COCO-SGG json
categories.json                              80 object categories, 116 predicates

Boxes are COCO [x, y, width, height] in pixels. A relation's subject_id and object_id are the ids of the image's objects; predicate_id indexes rel_categories. Both splits share the category ids (the 80 COCO classes in COCO order, ids 1-80, with HICO-DET's spellings such as dining_table) and the predicate ids (alphabetical, 0-115).

from datasets import load_dataset

ds = load_dataset("maelic/HICO-DET-coco-format", split="test")
row = ds[0]
row["image"], row["objects"][0]["bbox"], row["relations"][0]

From HICO-DET to scene graphs

  • Each annotated interaction becomes one relation from the person box to the object box. The predicate is the verb's gerund (ride -> riding, sit_on -> sitting on): the 116 verbs of HICO-DET without no_interaction.
  • HICO-DET stores one person box and one object box per interaction, so the same object appears several times with slightly different coordinates. Boxes of the same category that overlap at IoU >= 0.5 (HICO-DET's own matching criterion) are merged into one object (their mean box); a relation whose two ends merge is dropped.
  • Invisible instances are skipped, and an image keeps at most 40 boxes.
  • no_interaction annotations and the image-level negative captions are not relations here; RelateAnything turns them into the explicit negatives of maelic/OV-SGG-Bench (datamix/hicodet_negatives*.json).

The conversion is training/convert_hicodet.py; this repository is built by release/build_hicodet_coco.py.

Predicates (116)

adjusting · assembling · blocking · blowing · boarding · breaking · brushing with · buying · carrying · catching · chasing · checking · cleaning · controling · cooking · cutting · cutting with · directing · dragging · dribbling · drinking with · driving · drying · eating · eating at · exiting · feeding · filling · flipping · flushing · flying · greeting · grinding · grooming · herding · hitting · holding · hopping on · hosing · hugging · hunting · inspecting · installing · jumping · kicking · kissing · lassoing · launching · licking · lifting · lighting · loading · losing · lying on · making · milking · moving · opening · operating · packing · painting · parking · paying · peeling · petting · picking · picking up · pointing · pouring · pulling · pushing · racing · reading · releasing · repairing · riding · rowing · running · sailing · scratching · serving · setting · shearing · signing · sipping · sitting at · sitting on · sliding · smelling · spining · squeezing · stabbing · standing on · standing under · sticking · stirring · stopping at · straddling · swinging · tagging · talking on · teaching · texting on · throwing · toasting · training · turning · tying · typing on · walking · washing · watching · waving · wearing · wielding · zipping

Images and license

The images are those of HICO-DET as distributed in zhimeng/hico_det; their JPEG bytes are copied unchanged. Images and annotations remain under the terms of the original HICO-DET release (project page); use them for research and cite the original work:

@inproceedings{chao2018learning,
  title     = {Learning to Detect Human-Object Interactions},
  author    = {Chao, Yu-Wei and Liu, Yunfan and Liu, Xieyang and Zeng, Huayi and Deng, Jia},
  booktitle = {IEEE Winter Conference on Applications of Computer Vision (WACV)},
  year      = {2018}
}
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