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功能1：Threshold_Jpg

将图片灰度化 + 二值化 + 修改尺寸大小 + 保持图片。

功能2：test

文件txt中包含一串字符串，当遇到【换行】，需要换行操作。

# _*_ coding: utf-8 _*_import osimport cv2import numpy as npdef Threshold_Jpg(src_dir):    files = os.listdir(src_dir)    for s in files:        fileName = src_dir + '/' + s        print(fileName)        src = cv2.imread(fileName)        grayImage = cv2.cvtColor(src, cv2.COLOR_BGR2GRAY)        r, img_temp = cv2.threshold(grayImage, 200, 255, cv2.THRESH_BINARY_INV)#THRESH_BINARY_INV        img_new = cv2.resize(img_temp, (20, 20), interpolation=cv2.INTER_CUBIC)        nameNewImg = 'z'+ s        nameNewImg = nameNewImg.replace(".jpg",".png")        nameNewImg = nameNewImg.replace(".bmp", ".png")        nameNewImg = nameNewImg.replace(".jpeg", ".png")        cv2.imwrite(nameNewImg, img_new, [int(cv2.IMWRITE_JPEG_QUALITY),95]）def test():    fileobj = open('D:\\a.txt', 'r', encoding='UTF-8')    try:        strText = fileobj.read()    finally:        fileobj.close()    print(strText)    xuxin = strText.replace('【换行】', '【换行】\r\n')    print(xuxin)    with open("D:\\a2.txt", "w", encoding='UTF-8') as f:        f.write(xuxin)if __name__ == '__main__':    test()    #src_dir = './2_data/test5/1'    #Threshold_Jpg(src_dir)

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