python之滑动认证(图片)

from PIL import Image, ImageEnhance
from io import BytesIO

def cutImg(imgsrc):
    """
     根据坐标位置剪切图片
    :param imgsrc: 原始图片路径(str)
    :param out_img_name: 剪切输出图片路径(str)
    :param coordinate: 原始图片上的坐标(tuple) egg:(x, y, w, h) ---> x,y为矩形左上角坐标, w,h为右下角坐标
    :return:

    from PIL import Image
    from PIL import ImageEnhance
    #原始图像
    image = Image.open(‘lena.jpg‘)
    image.show()
    #亮度增强
    enh_bri = ImageEnhance.Brightness(image)
    brightness = 1.5
    image_brightened = enh_bri.enhance(brightness)
    image_brightened.show()
    #色度增强
    enh_col = ImageEnhance.Color(image)
    color = 1.5
    image_colored = enh_col.enhance(color)
    image_colored.show()
    #对比度增强
    enh_con = ImageEnhance.Contrast(image)
    contrast = 1.5
    image_contrasted = enh_con.enhance(contrast)
    image_contrasted.show()
    #锐度增强
    enh_sha = ImageEnhance.Sharpness(image)
    sharpness = 3.0
    image_sharped = enh_sha.enhance(sharpness)
    image_sharped.show()

    """




    # image.save(buffered, format="PNG")
    # img_str = base64.b64encode(buffered.getvalue())

    x=random.randint(100,260)
    y=random.randint(0,80)
    w=x+40
    h=y+40
    coordinate=(x,y,w,h)

    image = Image.open(imgsrc)
    region = image.crop(coordinate)
    region = ImageEnhance.Contrast(region).enhance(1.0)
    # region2 = ImageEnhance.Contrast(region).enhance(0.1)
    region2 = ImageEnhance.Brightness(region).enhance(0.5)
    region2.show()
    buffered = BytesIO()
    region.save(buffered, format="PNG")
    img_paste = base64.b64encode(buffered.getvalue()).decode()
    buffered.close()

    image.paste(region2, (x, y))
    buffered2 = BytesIO()
    image.save(buffered2, format="PNG")
    img_bg=base64.b64encode(buffered2.getvalue()).decode()
    buffered2.close()