Python实现可自定义大小的截屏功能

global old_x, old_y, new_x, new_y, full, hm
  if event.MessageName == "mouse left down":
    old_x, old_y = event.Position
  if event.MessageName == "mouse left up":
    new_x, new_y = event.Position

# 划屏
  if full:
    image = ImageGrab.grab((0, 0, gsm(0), gsm(1)))
  else:
    image = ImageGrab.grab((old_x, old_y, new_x, new_y))
  image.show()

# coding: utf8
# @Author: 郭 璞
# @File: capture.py
# @Time: 2017/7/24
# @Contact: 1064319632@qq.com
# @blog: http://blog.csdn.net/marksinoberg
# @Description: 根据鼠标移动进行划屏截图
import pyHook
import pythoncom
import win32gui
from PIL import Image, ImageGrab
from win32api import GetSystemMetrics as gsm
# 提前绑定鼠标位置事件
old_x, old_y = 0, 0
new_x, new_y = 0, 0
def hotkey(key=None):
  """绑定热键，开始进行划屏截图操作"""
  pass
def on_mouse_event(event):
  global old_x, old_y, new_x, new_y, full, hm
  if event.MessageName == "mouse left down":
    old_x, old_y = event.Position
  if event.MessageName == "mouse left up":
    new_x, new_y = event.Position
    # 解除事件绑定
    hm.UnhookMouse()
    hm = None
  # 划屏
  if full:
    image = ImageGrab.grab((0, 0, gsm(0), gsm(1)))
  else:
    image = ImageGrab.grab((old_x, old_y, new_x, new_y))
  image.show()
full = False
hm = None
def capture():
  hm = pyHook.HookManager()
  hm.SubscribeMouseAll(on_mouse_event)
  hm.HookMouse()
  pythoncom.PumpMessages()
capture()

# coding: utf8
# @Author: 郭 璞
# @File: similar.py
# @Time: 2017/7/23
# @Contact: 1064319632@qq.com
# @blog: http://blog.csdn.net/marksinoberg
# @Description: 两张图片相似度计算实现。
from PIL import Image
def pixel_way(img1, img2):
  image1 = Image.open(img1, 'r')
  image2 = Image.open(img2, 'r')
  return get_pixel_details(image1)==get_pixel_details(image2)
def get_pixel_details(img):
  pixels = img.load()
  r, g, b = 0, 0, 0
  counter = 0
  for x in range(img.size[0]):
    for y in range(img.size[1]):
      counter += 1
      r1, g1, b1 = pixels[x, y]
      r += r1
      g += g1
      b += b1
  return (r/counter, g/counter, b/counter)
if __name__ == '__main__':
  image1 = r'./1.png'
  image2 = r'./1.png'
  img = Image.open(image1, 'r')
  img.resize((256,256)).convert("RGB")
  print(pixel_way(image1, image2))

# coding: utf8
# @Author: 郭 璞
# @File: pixel-compare.py
# @Time: 2017/7/24
# @Contact: 1064319632@qq.com
# @blog: http://blog.csdn.net/marksinoberg
# @Description: 计算RGB值相关
from PIL import Image
from PIL import ImageDraw
im = Image.open('1.png')
im = im.convert("L")
width, height = im.size
pix = im.load()
a = [0]*256
for w in range(width):
  for h in range(height):
    p = pix[w, h]
    a[p] = a[p] + 1
x = max(a)
print(a, "---", len(a), '-----', x)
image = Image.new('RGB', (256, 256), (255, 255, 255))
draw = ImageDraw.Draw(image)
for k in range(256):
  a[k] = a[k]*200/x
  source = (k, 255)
  target = (k, 255-a[k])
  draw.line([source, target], (100, 100, 100))
image.show()