Upload ocr_using_qwenvl_by_ps.py

ocr_using_qwenvl_by_ps.py

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+# -*- coding: utf-8 -*-
+"""OCR_using_QwenVL_by_PS.ipynb
+
+Automatically generated by Colab.
+
+Original file is located at
+    https://colab.research.google.com/drive/1lNLVl8FzVRrSv4dMd9vXqnz8SYtKoebf
+"""
+
+# Import libraries
+import cv2
+from PIL import Image
+from transformers import AutoProcessor, Qwen2VLForConditionalGeneration
+import torch
+from byaldi import RAGMultiModalModel
+from google.colab import files
+from IPython.display import display, HTML
+import os
+import re
+
+# to detect cuda(GPU)
+device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
+print("Using device:", device)
+
+#loading models
+RAG = RAGMultiModalModel.from_pretrained("vidore/colpali", verbose=0)
+model = Qwen2VLForConditionalGeneration.from_pretrained(
+    "Qwen/Qwen2-VL-2B-Instruct",
+    torch_dtype=torch.float16,
+    device_map="auto"
+)
+processor = AutoProcessor.from_pretrained("Qwen/Qwen2-VL-2B-Instruct")
+
+torch.cuda.empty_cache()
+
+#Upload image
+# def upload_image():
+#     uploaded = files.upload()
+#     for filename in uploaded.keys():
+#         print(f'Uploaded file: {filename}')
+#         return filename
+
+# image_path = upload_image()
+
+# Preprocessing using OpenCV
+def preprocess_image(image_path):
+    image = cv2.imread(image_path)
+    if image is None:
+        raise FileNotFoundError(f"Image not found at the path: {image_path}")
+
+    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
+
+    # Maintain aspect ratio
+    height, width = gray.shape
+    if height > width:
+        new_height = 1024
+        new_width = int((width / height) * new_height)
+    else:
+        new_width = 1024
+        new_height = int((height / width) * new_width)
+
+    resized_image = cv2.resize(gray, (new_width, new_height))
+
+    blurred = cv2.GaussianBlur(resized_image, (5, 5), 0)
+    thresholded = cv2.adaptiveThreshold(blurred, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY, 11, 2)
+    denoised = cv2.fastNlMeansDenoising(thresholded, h=30)
+    pil_image = Image.fromarray(denoised)
+
+    return pil_image
+
+ # Call the function and store the result
+# pil_image = preprocess_image(image_path)
+
+# display(pil_image) # Now pil_image is accessible here
+
+#extract the text
+def extract_text(image_path):
+    try:
+        processed_image = preprocess_image(image_path)
+        messages = [
+            {"role": "user", "content": [{"type": "image"}, {"type": "text", "text": "PLease extract the both hindi and english text as they appear in the image"}]}
+        ]
+        text_prompt = processor.apply_chat_template(messages, add_generation_prompt=True)
+        inputs = processor(text=[text_prompt], images=[processed_image], padding=True, return_tensors="pt").to(device)
+        output_ids = model.generate(**inputs, max_new_tokens=1042)
+        generated_ids = [output_ids[len(input_ids):] for input_ids, output_ids in zip(inputs.input_ids, output_ids)]
+        extracted_text = processor.batch_decode(generated_ids, skip_special_tokens=True, clean_up_tokenization_spaces=True)[0]
+        return extracted_text
+    except Exception as e:
+        return f"An error occurred during text extraction: {e}"
+
+#keyword searching
+def keyword_search(extracted_text, keywords):
+    if not keywords:
+        return extracted_text, "Please enter a keyword to search and highlight."
+    keywords = [keyword.strip() for keyword in keywords.split(",") if keyword.strip()]
+
+    highlighted_text = ""
+
+    lines = extracted_text.split('\n')
+    for line in lines:
+        for keyword in keywords:
+            pattern = re.compile(re.escape(keyword), re.IGNORECASE)
+            line = pattern.sub(lambda m: f'<span style="color: red;">{m.group()}</span>', line)
+        highlighted_text += line + '\n'
+    return highlighted_text
+
+#OCR and keyword search interface
+def ocr_interface(image):
+    image_path = "temp_image.png"
+    image.save(image_path)
+    extracted_text = extract_text(image_path)
+    os.remove(image_path)
+
+    return extracted_text, ""
+def keyword_interface(extracted_text, keywords):
+    highlighted_text = keyword_search(extracted_text, keywords)
+    return highlighted_text
+