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Delete ocr_extractor.py
Browse files- ocr_extractor.py +0 -139
ocr_extractor.py
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import sys
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import importlib
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from PIL import Image
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import boto3
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import os
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from doctr.io import DocumentFile
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from doctr.models import ocr_predictor
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import easyocr
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from shapely.geometry import Polygon
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from paddleocr import PaddleOCR
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import langid
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import json
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import PyPDF2
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# Check if python-bidi is installed
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if importlib.util.find_spec("bidi") is None:
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print("Error: python-bidi is not installed. Please install it using pip install python-bidi")
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sys.exit(1)
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# Initialize OCR models
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def load_models(language):
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doctr_model = ocr_predictor(pretrained=True)
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easyocr_reader = easyocr.Reader([language])
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paddleocr_reader = PaddleOCR(use_angle_cls=True, lang=language)
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return doctr_model, easyocr_reader, paddleocr_reader
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# AWS Textract client
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textract_client = boto3.client('textract', region_name='us-west-2')
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def extract_text_aws(image_bytes):
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try:
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response = textract_client.detect_document_text(Document={'Bytes': image_bytes})
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return [(item['Text'], item['Geometry']['BoundingBox'], item['Confidence'])
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for item in response['Blocks'] if item['BlockType'] == 'WORD']
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except Exception as e:
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print(f"Error in AWS Textract: {str(e)}")
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return []
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def extract_text_doctr(image_path, doctr_model):
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try:
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doc = DocumentFile.from_images(image_path)
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result = doctr_model(doc)
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return [(word.value, word.geometry, word.confidence)
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for block in result.pages[0].blocks for line in block.lines for word in line.words]
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except Exception as e:
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print(f"Error in Doctr OCR: {str(e)}")
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return []
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def extract_text_easyocr(image_path, easyocr_reader):
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try:
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result = easyocr_reader.readtext(image_path)
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return [(detection[1], detection[0], detection[2]) for detection in result]
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except Exception as e:
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print(f"Error in EasyOCR: {str(e)}")
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return []
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def extract_text_paddleocr(image_path, paddleocr_reader):
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try:
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result = paddleocr_reader.ocr(image_path, cls=True)
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return [(line[1][0], line[0], line[1][1]) for line in result[0]]
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except Exception as e:
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print(f"Error in PaddleOCR: {str(e)}")
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return []
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def bbox_to_polygon(bbox):
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if isinstance(bbox, dict): # AWS format
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return Polygon([(bbox['Left'], bbox['Top']),
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(bbox['Left']+bbox['Width'], bbox['Top']),
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(bbox['Left']+bbox['Width'], bbox['Top']+bbox['Height']),
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(bbox['Left'], bbox['Top']+bbox['Height'])])
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elif len(bbox) == 4 and all(isinstance(p, (list, tuple)) for p in bbox): # EasyOCR format
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return Polygon(bbox)
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elif len(bbox) == 2: # Doctr format
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x, y, w, h = bbox[0][0], bbox[0][1], bbox[1][0] - bbox[0][0], bbox[1][1] - bbox[0][1]
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return Polygon([(x, y), (x+w, y), (x+w, y+h), (x, y+h)])
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else:
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raise ValueError(f"Unsupported bbox format: {bbox}")
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def combine_ocr_results(results, weights):
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combined_words = []
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for method, words in results.items():
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for word, bbox, confidence in words:
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try:
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polygon = bbox_to_polygon(bbox)
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combined_words.append((word, polygon, float(confidence) * weights[method]))
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except Exception as e:
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print(f"Error processing word '{word}' from {method}: {str(e)}")
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final_words = []
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while combined_words:
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current_word = combined_words.pop(0)
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overlapping = [w for w in combined_words if current_word[1].intersects(w[1])]
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if overlapping:
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best_word = max([current_word] + overlapping, key=lambda x: x[2])
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final_words.append(best_word[0])
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for word in overlapping:
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combined_words.remove(word)
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else:
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final_words.append(current_word[0])
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return ' '.join(final_words)
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def detect_language(text):
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language, _ = langid.classify(text)
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return language
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def process_file(file_path, weights_file):
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_, file_extension = os.path.splitext(file_path)
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if file_extension.lower() == '.pdf':
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with open(file_path, 'rb') as file:
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pdf_reader = PyPDF2.PdfReader(file)
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text = ""
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for page in pdf_reader.pages:
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text += page.extract_text() + "\n"
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return text
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else: # Assume it's an image file
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with open(weights_file, 'r') as f:
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weights = json.load(f)
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with open(file_path, 'rb') as image_file:
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image_bytes = image_file.read()
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# Detect language using a sample of text from AWS Textract
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aws_results = extract_text_aws(image_bytes)
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sample_text = ' '.join([item[0] for item in aws_results[:10]])
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detected_language = detect_language(sample_text)
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doctr_model, easyocr_reader, paddleocr_reader = load_models(detected_language)
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results = {
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"aws": aws_results,
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"doctr": extract_text_doctr(file_path, doctr_model),
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"easyocr": extract_text_easyocr(file_path, easyocr_reader),
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"paddleocr": extract_text_paddleocr(file_path, paddleocr_reader),
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}
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return combine_ocr_results(results, weights)
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