feat: integrate FSC-147 benchmark task (#1163)

Author: Luodian

docs/current_tasks.md

@@ -50,6 +50,7 @@ python -m lmms_eval --tasks list_with_num
 - [CountBench](https://huggingface.co/datasets/vikhyatk/CountBenchQA) (countbench)
 - [CV-Bench](https://github.com/nyu-visionx/CV-Bench) (cv_bench)
 - [DetailCaps-4870](https://github.com/foundation-multimodal-models/CAPTURE) (detailcaps)
+- [FSC-147](https://github.com/cvlab-stonybrook/LearningToCountEverything) (fsc147)
 - [Flickr30K](https://github.com/BryanPlummer/flickr30k_entities) (flickr30k)
   - Flickr30K Test (flickr30k_test)
 - [GQA](https://cs.stanford.edu/people/dorarad/gqa/index.html) (gqa)

lmms_eval/tasks/fsc147/fsc147.yaml

@@ -0,0 +1,25 @@
+dataset_path: yifehuang97/CoCount-train-fsc147
+task: fsc147
+test_split: train
+output_type: generate_until
+doc_to_visual: !function utils.fsc147_doc_to_visual
+doc_to_text: !function utils.fsc147_doc_to_text
+doc_to_target: !function utils.fsc147_doc_to_target
+generation_kwargs:
+  max_new_tokens: 32
+  temperature: 0
+  do_sample: false
+process_results: !function utils.fsc147_process_results
+metric_list:
+  - metric: fsc147_exact_match
+    aggregation: !function utils.fsc147_aggregate_exact_match
+    higher_is_better: true
+  - metric: fsc147_mae
+    aggregation: !function utils.fsc147_aggregate_mae
+    higher_is_better: false
+lmms_eval_specific_kwargs:
+  default:
+    pre_prompt: ""
+    post_prompt: "\nAnswer with only an integer."
+metadata:
+  - version: 0.0

lmms_eval/tasks/fsc147/utils.py

@@ -0,0 +1,109 @@
+import re
+from typing import Any
+
+from PIL import Image
+
+_COUNT_KEYS = ["annotated_pos_count", "pos_count", "count", "answer", "label", "gt_count", "gt_num"]
+_CAPTION_KEYS = ["pos_caption", "caption", "question", "query", "prompt", "text"]
+_IMAGE_KEYS = ["image", "img", "query_image"]
+
+
+def _to_rgb(image_obj: Any):
+    if isinstance(image_obj, Image.Image):
+        return image_obj.convert("RGB")
+    return None
+
+
+def _to_int(value: Any):
+    if value is None or isinstance(value, bool):
+        return None
+
+    if isinstance(value, (int, float)):
+        return int(round(float(value)))
+
+    text = str(value).strip().replace(",", "")
+    if not text:
+        return None
+
+    match = re.search(r"-?\d+(?:\.\d+)?", text)
+    if not match:
+        return None
+
+    try:
+        return int(round(float(match.group(0))))
+    except ValueError:
+        return None
+
+
+def _extract_count(doc: dict):
+    for key in _COUNT_KEYS:
+        count = _to_int(doc.get(key))
+        if count is not None:
+            return count
+    return None
+
+
+def _extract_caption(doc: dict) -> str:
+    for key in _CAPTION_KEYS:
+        value = doc.get(key)
+        if isinstance(value, str) and value.strip():
+            text = value.strip()
+            text = re.sub(r"^[Tt]he\s+", "", text)
+            return text.rstrip(". ")
+    return "objects"
+
+
+def fsc147_doc_to_visual(doc):
+    visuals = []
+    for key in _IMAGE_KEYS:
+        image_obj = _to_rgb(doc.get(key))
+        if image_obj is not None:
+            visuals.append(image_obj)
+            break
+    return visuals
+
+
+def fsc147_doc_to_text(doc, lmms_eval_specific_kwargs=None):
+    kwargs = lmms_eval_specific_kwargs or {}
+    pre_prompt = kwargs.get("pre_prompt", "")
+    post_prompt = kwargs.get("post_prompt", "")
+
+    object_phrase = _extract_caption(doc)
+    question = f"How many {object_phrase} are there in the image?"
+    return f"{pre_prompt}{question}{post_prompt}"
+
+
+def fsc147_doc_to_target(doc):
+    target = _extract_count(doc)
+    if target is None:
+        return ""
+    return str(target)
+
+
+def fsc147_process_results(doc, results):
+    prediction = str(results[0]).strip() if results else ""
+    target_count = _extract_count(doc)
+
+    if target_count is None:
+        return {"fsc147_exact_match": 0.0, "fsc147_mae": 0.0}
+
+    pred_count = _to_int(prediction)
+    if pred_count is None:
+        return {"fsc147_exact_match": 0.0, "fsc147_mae": float(abs(target_count))}
+
+    return {
+        "fsc147_exact_match": float(pred_count == target_count),
+        "fsc147_mae": float(abs(pred_count - target_count)),
+    }
+
+
+def fsc147_aggregate_exact_match(items):
+    if not items:
+        return 0.0
+    return sum(float(item) for item in items) / len(items)
+
+
+def fsc147_aggregate_mae(items):
+    if not items:
+        return 0.0
+    return sum(float(item) for item in items) / len(items)