{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the processing procedures for OCR modules in blockchains?","a":"Image preprocessing: This stage mainly includes operations such as denoising, grayscale conversion, binaryization, and image scaling, aiming to improve  the image quality and facilitate subsequent recognition processing."}]}],"pr":"f872b55b0a9742d8c3f1a9363c1321fe54445ba9007d1d0a9983493f65168ec4"}