{ "table_of_contents": [ { "title": "Diffusion Models: A Comprehensive Survey of Methods and Applications", "heading_level": null, "page_id": 0, "polygon": [ [ 72.18112742900848, 94.39459228515625 ], [ 470.0069274902344, 94.39459228515625 ], [ 470.0069274902344, 106.91470527648926 ], [ 72.18112742900848, 106.91470527648926 ] ] }, { "title": "ACM Reference Format:", "heading_level": null, "page_id": 0, "polygon": [ [ 73.14600372314453, 422.7341613769531 ], [ 160.62805116176605, 421.49034547805786 ], [ 160.13963317871094, 430.7042541503906 ], [ 73.14600372314453, 431.02292490005493 ] ] }, { "title": "Contents", "heading_level": null, "page_id": 1, "polygon": [ [ 304.7472528219223, 98.2744140625 ], [ 343.90753173828125, 98.10079747438431 ], [ 343.90753173828125, 107.2408447265625 ], [ 304.7472528219223, 108.4187046289444 ] ] }, { "title": "1 INTRODUCTION", "heading_level": null, "page_id": 2, "polygon": [ [ 73.37678647041321, 572.7346229553223 ], [ 157.8774425983429, 571.1877479553223 ], 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