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README.md

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+Repository for the **Partonomy-Core** benchmark introduced in [*PARTONOMY: Large Multimodal Models with Part-Level Visual Understanding*](https://arxiv.org/abs/2505.20759).
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+The `images` directory contains all images used in the **Partonomy-Core** evaluation. Evaluation questions, answer choices, and corresponding parts for each answer choice are contained in `partonomy_qa_pairs.json`. Each question-answer JSON object contains the following fields:
+- `image_path` (str): Relative path to the image corresponding to the question.
+- `image_label` (str): Label for the object in the image.
+- `question` (str): The LMM prompt used for evaluation of parts.
+- `question_type` (str): The type of question. These include *identification_with_label* (**identification**), *positive_with_label* (**intersection**), *negative_with_label* (**difference**), *whole_to_part* (**Whole-to-Part**), and *part_to_whole* (**Part-to-Whole**).
+- `answer_choices` (list[str]): The multiple choice answer choices to evaluate the model with, using each answer choice individually as the model's response to the question prompt.
+- `answer_types` (list[str]): The correctness of each answer choice in the `answer_choices` field.
+- `answer_parts` (list[list[str]]): List containing each of the part names sampled for each answer choice.
+- `segmentations` (dict): Segmentation masks for each part, where keys are the part names. Segmentation mask objects for each part can be decoded into binary masks using `pycocotools.mask.decode`.
+- `object_question` (str): Analogue of `question` LLM prompt, used for evaluation of the object label. Only present for Whole-to-Part and Part-to-Whole questions.
+- `object_answer_choices` (list[str]): Answer choices for the `object_question` prompt. Only present for Whole-to-Part and Part-to-Whole questions.
+- `object_answer_types` (list[str]): The correctness of each answer choice in the `object_answer_choices` field. Only present for Whole-to-Part and Part-to-Whole questions.
+- `object_answer_classes` (list[str]): The object class used for each answer choice in `object_answer_choices`.