PIL模块

from PIL import Image
from PIL import ImageEnhance

targetImg = fmImg(srcimgpath, width, height)
targetImg.save(targetimgpath, "JPEG")

def fmImg(imgPath,picwidth,picheight):
    targetImg = Image.open(imgPath)
    targetImg = transformpic(targetImg)
    targetImg = targetImg.resize((picwidth, picheight), Image.ANTIALIAS)
    return targetImg

def transformpic(img):
    enc2 = ImageEnhance.Contrast(img)
    img = enc2.enhance(1.3)
    enc = ImageEnhance.Sharpness(img)
    img = enc.enhance(1.3)
    return img

srcimg = Image.open(srcimgpath)
angle = 90
targetImg = srcimg.rotate(angle)
targetImg.save(targetimgpath, "JPEG")