textvqa eval script

eval_textvqa.py

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+import os
+import json
+from collections import Counter
+import numpy as np
+from PIL import Image
+from tqdm import tqdm
+import torch
+from torch.utils.data import DataLoader
+from nltk.translate.bleu_score import sentence_bleu, SmoothingFunction
+from minigpt4.common.eval_utils import (
+    prepare_texts,
+    init_model,
+    eval_parser,
+)
+from minigpt4.conversation.conversation import CONV_VISION_minigptv2
+from minigpt4.common.config import Config
+
+
+def list_of_str(arg):
+    return list(map(str, arg.split(",")))
+
+
+parser = eval_parser()
+parser.add_argument("--dataset", type=list_of_str, default='refcoco', help="dataset to evaluate")
+parser.add_argument("--res", type=float, default=100.0, help="resolution used in refcoco")
+parser.add_argument("--resample", action='store_true', help="resolution used in refcoco")
+args = parser.parse_args()
+cfg = Config(args)
+
+model, vis_processor = init_model(args)
+conv_temp = CONV_VISION_minigptv2.copy()
+conv_temp.system = ""
+model.eval()
+save_path = cfg.run_cfg.save_path
+
+os.makedirs(save_path, exist_ok=True)
+
+
+class EvalTextVQAData(torch.utils.data.Dataset):
+    def __init__(self, loaded_data, image_processor):
+        self.loaded_data = loaded_data
+        self.image_processor = image_processor
+
+    def __len__(self):
+        return len(self.loaded_data)
+
+    def __getitem__(self, idx):
+        data = self.loaded_data[idx]
+        question = data["question"]
+        question = f"[vqa] {question}"
+        image = Image.open(data["image_path"]).convert("RGB")
+        image = self.image_processor(image)
+        return image, question, data["image_id"], data["answers"]
+
+
+eval_file_path = cfg.evaluation_datasets_cfg["textvqa"]["eval_file_path"]
+img_path = cfg.evaluation_datasets_cfg["textvqa"]["img_path"]
+batch_size = cfg.evaluation_datasets_cfg["textvqa"]["batch_size"]
+max_new_tokens = cfg.evaluation_datasets_cfg["textvqa"]["max_new_tokens"]
+
+with open(eval_file_path, "r") as f:
+    train_data = json.load(f)
+
+data = []
+for item in train_data:
+    data.append(
+        {
+            "question": item["question"],
+            "image_id": item["image_id"],
+            "image_path": os.path.join(img_path, item["image_id"] + ".jpg"),
+            "answers": item["answers"],
+        }
+    )
+
+textvqa = EvalTextVQAData(data, vis_processor)
+eval_dataloader = DataLoader(textvqa, batch_size=batch_size, shuffle=False)
+
+count = 0
+total = 0
+minigpt4_predict = []
+print("Evaluating on TextVQA dataset")
+for images, texts, image_id, labels in tqdm(eval_dataloader):
+    texts = prepare_texts(
+        texts, conv_temp
+    )  # warp the texts with conversation template
+    answers = model.generate(images,
+                             texts, 
+                             max_new_tokens=max_new_tokens, 
+                             do_sample=False)
+
+    # Stack the labels to correct order (transpose)
+    labels = [list(x) for x in zip(*labels)]
+
+    for answer, labels in zip(answers, labels):
+        result = dict()
+        result["pred"] = answer.lower().replace("<unk>", "").strip()
+        result["gt"] = Counter(labels).most_common(1)[0][0]
+
+        minigpt4_predict.append(result)
+        if answer.lower() == result["gt"]:
+            count += 1
+        total += 1
+
+        # Calculate BLEU score
+        chencherry = SmoothingFunction()
+        bleu_score = sentence_bleu(
+            labels, answer, smoothing_function=chencherry.method1
+        )
+        result["bleu"] = bleu_score
+
+
+print("Saving predictions to", save_path)
+file_save_path = os.path.join(save_path, "textvqa.json")
+with open(file_save_path, "w") as f:
+    json.dump(minigpt4_predict, f)
+
+print("Top 1 Accuracy:", count / total * 100, flush=True)
+print("Average BLEU score: ",
+       np.mean([pred["bleu"] for pred in minigpt4_predict]),
+       flush=True)