python实现彩色图转换成灰度图

from PIL import Imageimport os # 图像组成：红绿蓝 （RGB）三原色组成 亮度（255,255,255）image = "Annie1.jpg"img = Image.open(image)img_all = "素描" + imagenew = Image.new("L", img.size, 255)width, height = img.sizeimg = img.convert("L")# print(img.size)# print(img.mode) #RBG## img_get = img.getpixel((0, 0))# print(img_get) #三原色通道## img_L=img.convert('L')# print(img_L)# img_get_L=img_L.getpixel((0,0)) #换算 得到灰度值# print(img_get_L) # 定义画笔的大小Pen_size = 3# 色差扩散器Color_Diff = 6for i in range(Pen_size + 1, width - Pen_size - 1): for j in range(Pen_size + 1, height - Pen_size - 1):  # 原始的颜色  originalColor = 255  lcolor = sum([img.getpixel((i - r, j)) for r in range(Pen_size)]) // Pen_size  rcolor = sum([img.getpixel((i + r, j)) for r in range(Pen_size)]) // Pen_size   # 通道----颜料  if abs(lcolor - rcolor) > Color_Diff:   originalColor -= (255 - img.getpixel((i, j))) // 4   new.putpixel((i, j), originalColor)   ucolor = sum([img.getpixel((i, j - r)) for r in range(Pen_size)]) // Pen_size  dcolor = sum([img.getpixel((i, j + r)) for r in range(Pen_size)]) // Pen_size   # 通道----颜料  if abs(ucolor - dcolor) > Color_Diff:   originalColor -= (255 - img.getpixel((i, j))) // 4   new.putpixel((i, j), originalColor)   acolor = sum([img.getpixel((i - r, j - r)) for r in range(Pen_size)]) // Pen_size  bcolor = sum([img.getpixel((i + r, j + r)) for r in range(Pen_size)]) // Pen_size   # 通道----颜料  if abs(acolor - bcolor) > Color_Diff:   originalColor -= (255 - img.getpixel((i, j))) // 4   new.putpixel((i, j), originalColor)   qcolor = sum([img.getpixel((i + r, j - r)) for r in range(Pen_size)]) // Pen_size  wcolor = sum([img.getpixel((i - r, j + r)) for r in range(Pen_size)]) // Pen_size   # 通道----颜料  if abs(qcolor - wcolor) > Color_Diff:   originalColor -= (255 - img.getpixel((i, j))) // 4   new.putpixel((i, j), originalColor) new.save(img_all) i = os.system('mshta vbscript createobject("sapi.spvoice").speak("%s")(window.close)' % '您的图片转换好了')os.system(img_all)