Pythonで画像に対する文字認識　その１（EasyOCR、Node-RED）

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画像パスを取得\nresults = reader.readtext(image_path, detail=0)  # detail=0 で文字のみ取得\n\n# 文字列として出力\nfor text in results:\n    print(f\"{text}\\n\", end='')\n","continuous":false,"x":2190,"y":5540,"wires":[["73522a73e80f97ef"]]},{"id":"ac97631b10166266","type":"change","z":"22eb2b8f4786695c","name":"","rules":[{"t":"delete","p":"payload","pt":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":2010,"y":5540,"wires":[["48a5f9b42fe1b4b6","ae8ae8f4453c7652"]]},{"id":"45ff17b9119baf32","type":"ui-text","z":"22eb2b8f4786695c","group":"5b61894784d153dc","order":4,"width":0,"height":0,"name":"","label":"Detected","format":"{{msg.payload}}","layout":"col-center","style":false,"font":"","fontSize":16,"color":"#717171","wrapText":true,"className":"","x":2340,"y":5580,"wires":[]},{"id":"d1d9632cd29dcefb","type":"ui-button","z":"22eb2b8f4786695c","group":"5b61894784d153dc","name":"","label":"button","order":3,"width":0,"height":0,"emulateClick":false,"tooltip":"","color":"","bgcolor":"","className":"","icon":"","iconPosition":"left","payload":"","payloadType":"str","topic":"topic","topicType":"msg","buttonColor":"","textColor":"","iconColor":"","enableClick":true,"enablePointerdown":false,"pointerdownPayload":"","pointerdownPayloadType":"str","enablePointerup":false,"pointerupPayload":"","pointerupPayloadType":"str","x":2190,"y":5620,"wires":[["45ff17b9119baf32"]]},{"id":"ae8ae8f4453c7652","type":"venv","z":"22eb2b8f4786695c","venvconfig":"015784e9e3e0310a","name":"","code":"import easyocr\nimport cv2\nimport numpy as np\n\n# 画像の前処理関数\ndef preprocess_image(image_path):\n    # 画像を読み込む\n    image = cv2.imread(image_path)\n\n    # グレースケールに変換\n    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)\n\n    # ノイズ除去\n    gray = cv2.fastNlMeansDenoising(gray, None, 30, 7, 21)\n\n    # 二値化（しきい値処理）\n    _, binary_image = cv2.threshold(gray, 150, 255, cv2.THRESH_BINARY)\n\n    # サイズ変更（拡大）\n    resized_image = cv2.resize(binary_image, None, fx=1.5, fy=1.5, interpolation=cv2.INTER_CUBIC)\n\n    # 前処理した画像を返す\n    return resized_image\n\n# EasyOCRのリーダー（GPU使用）\nreader = easyocr.Reader(['ja', 'en'], gpu=True)\n\n# 画像ファイルのOCR処理\nimage_path = msg['file']['name']  # 画像パスを取得\n\n# 前処理を施した画像を取得\npreprocessed_image = preprocess_image(image_path)\n\n# 前処理後の画像を一時的に保存してOCR処理を行う（後で削除することも可能）\npreprocessed_image_path = 'processed_image.jpg'\ncv2.imwrite(preprocessed_image_path, preprocessed_image)\n\n# OCR処理を行う\nresults = reader.readtext(preprocessed_image_path, detail=0)  # detail=0 で文字のみ取得\n\n# 文字列として出力\nfor text in results:\n    print(f\"{text}\\n\", end='')\n","continuous":false,"x":2190,"y":5660,"wires":[["25ab6b29149609cb","45ff17b9119baf32"]]},{"id":"25ab6b29149609cb","type":"debug","z":"22eb2b8f4786695c","name":"debug 504","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":2350,"y":5660,"wires":[]},{"id":"5b61894784d153dc","type":"ui-group","name":"EasyOCR","page":"42252fd6f309916f","width":"6","height":"1","order":2,"showTitle":true,"className":"","visible":"true","disabled":"false","groupType":"default"},{"id":"015784e9e3e0310a","type":"venv-config","venvname":"AI","version":"3.10"},{"id":"42252fd6f309916f","type":"ui-page","name":"Detection","ui":"ba89d595c555beb9","path":"/page3","icon":"home","layout":"grid","theme":"e2c9a4f37a42314e","breakpoints":[{"name":"Default","px":"0","cols":"3"},{"name":"Tablet","px":"576","cols":"6"},{"name":"Small Desktop","px":"768","cols":"9"},{"name":"Desktop","px":"1024","cols":"12"}],"order":3,"className":"","visible":"true","disabled":"false"},{"id":"ba89d595c555beb9","type":"ui-base","name":"My Dashboard","path":"/dashboard","appIcon":"","includeClientData":true,"acceptsClientConfig":["ui-notification","ui-control"],"showPathInSidebar":false,"headerContent":"page","navigationStyle":"default","titleBarStyle":"default","showReconnectNotification":true,"notificationDisplayTime":"1","showDisconnectNotification":true},{"id":"e2c9a4f37a42314e","type":"ui-theme","name":"Default Theme","colors":{"surface":"#ffffff","primary":"#0094CE","bgPage":"#eeeeee","groupBg":"#ffffff","groupOutline":"#cccccc"},"sizes":{"density":"default","pagePadding":"12px","groupGap":"12px","groupBorderRadius":"4px","widgetGap":"12px"}}]

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