# -*- coding: utf-8 -*-
"""created on tue dec 27 09:32:02 2016
@author:
"""import cv2
import numpy as np
current_pos = none
tl = none
br = none
#滑鼠事件
defget_rect
(im, title='get_rect'):
# (a,b) = get_rect(im, title='get_rect')
mouse_params =
cv2.namedwindow(title)
cv2.movewindow(title, 100, 100)
defonmouse
(event, x, y, flags, param):
param['current_pos'] = (x, y)
if param['tl'] is
notnone
andnot (flags & cv2.event_flag_lbutton):
param['released_once'] = true
if flags & cv2.event_flag_lbutton:
if param['tl'] is
none:
param['tl'] = param['current_pos']
elif param['released_once']:
param['br'] = param['current_pos']
cv2.setmousecallback(title, onmouse, mouse_params)
cv2.imshow(title, im)
while mouse_params['br'] is
none:
im_draw = np.copy(im)
if mouse_params['tl'] is
notnone:
cv2.rectangle(im_draw, mouse_params['tl'],
mouse_params['current_pos'], (255, 0, 0))
cv2.imshow(title, im_draw)
_ = cv2.waitkey(10)
cv2.destroywindow(title)
tl = (min(mouse_params['tl'][0], mouse_params['br'][0]),
min(mouse_params['tl'][1], mouse_params['br'][1]))
br = (max(mouse_params['tl'][0], mouse_params['br'][0]),
max(mouse_params['tl'][1], mouse_params['br'][1]))
return (tl, br) #tl=(y1,x1), br=(y2,x2)
defreadvideo
(pathname, skipframe):
cap = cv2.videocapture(0) #讀取攝像頭
if c = 1
while(cap.isopened()):
ret, frame = cap.read()
gray = cv2.cvtcolor(frame, cv2.color_bgr2gray)
if(c>=skipframe):
mask = np.zeros(gray.shape, dtype=np.uint8) #掩碼操作，該矩陣與大小型別一致，為初始化全0畫素值，之後對其操作區域賦值為1即可
if(c==skipframe):
(a,b) = get_rect(frame, title='get_rect') #滑鼠畫矩形框
img01, img02 = frame, frame
gray01, gray02 = gray, gray
else:
img1, img2 = prev_frame, frame
gray1, gray2 = prev_frame, frame
cv2.imshow('frame', frame)
c = c + 1
prev_gray = gray
prev_frame = frame
break
cap.release()
cv2.destroyallwindows()
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