图像相减_camera

Author: makelove

ch05-视频/5.VideoPlay.py

@@ -24,7 +24,7 @@
 frame_no = 121
 cap.set(1, frame_no)  # Where frame_no is the frame you want
 ret, frame = cap.read()  # Read the frame
-cv2.imshow('frame', frame)
+cv2.imshow('frame_no'+str(frame_no), frame)
 
 FRAME_NOW = cap.get(cv2.CAP_PROP_POS_FRAMES)
 print('当前帧数', FRAME_NOW)  # 当前帧数 122.0

ch10-图像上的算术运算/图像相减_camera.py

@@ -0,0 +1,80 @@
+# -*- coding: utf-8 -*-
+# @Time    : 2017/7/24 下午5:20
+# @Author  : play4fun
+# @File    : 图像相减_camera.py
+# @Software: PyCharm
+
+"""
+图像相减_camera.py:
+"""
+
+import cv2
+import numpy as np
+
+cap = cv2.VideoCapture(0)
+ret = cap.set(3, 640)
+ret = cap.set(4, 480)
+
+
+
+cap.read()
+cap.read()
+cap.read()
+cap.read()
+cap.read()
+cap.read()
+cap.read()
+cap.read()
+cap.read()
+cap.read()
+cap.read()
+cap.read()
+'''
+cal=[cap.read()[1] for x in range(20)]
+
+#mean 直接的加减是不行的
+# bgimg0=np.mean(np.sum(cal))
+# bgimg0=np.average(cal)
+# bgimg0=np.mean(cal)
+nps1=sum(cal)
+mean1=nps1/len(cal)
+# mean1[mean1<0]=0
+# mean1[mean1>255]=255
+cv2.imshow('bgimg', mean1)
+cv2.waitKey(0)
+exit(3)
+'''
+
+frame_no=100
+# cap.set(1, frame_no)#第10帧
+ret, bgimg0 = cap.read()  # 背景
+bgimg = cv2.cvtColor(bgimg0, cv2.COLOR_BGR2GRAY)
+cv2.imshow('bgimg'+str(frame_no), bgimg0)
+
+
+while cap.isOpened():
+    ret, frame = cap.read()# TODO 图像稳定
+    cv2.imshow("frame", frame)
+    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
+
+    #
+    st = cv2.subtract(gray, bgimg)
+    # st = cv2.subtract(img1, img2)#相反
+    # st[st <= 5] = 0  # 把小于20的像素点设为0
+
+    ret, threshold = cv2.threshold(st, 50, 255, cv2.THRESH_BINARY)
+
+    #TODO 对比前几/十几帧，新放一张扑克，知道是那张
+    #等待图像稳定，不放牌后，再计算
+
+
+    cv2.imshow("subtract", st)
+    cv2.moveWindow("subtract",y=bgimg.shape[0], x=0)
+    cv2.imshow('threshold',threshold)
+    cv2.moveWindow("threshold", x=bgimg.shape[1],y=0)
+
+    key = cv2.waitKey(delay=1)
+    if key == ord("q"):
+        break
+
+cv2.destroyAllWindows()

ch41-背景减除/41.2-BackgroundSubtractorMOG.py

@@ -29,7 +29,7 @@
 
     cv2.imshow('frame', fgmask)
     k = cv2.waitKey(1) #& 0xff
-    if k == 27:
+    if k == ord('q'):
         break
 cap.release()
 cv2.destroyAllWindows()

ch41-背景减除/41.3-BackgroundSubtractorMOG2.py

@@ -28,7 +28,7 @@
 
     cv2.imshow('frame', fgmask)
     k = cv2.waitKey(30) #& 0xff
-    if k == 27:
+    if k == ord('q'):
         break
 cap.release()
 cv2.destroyAllWindows()

ch41-背景减除/41.4-morphologyEx.py

@@ -31,7 +31,7 @@
     print(counter)
 
     k = cv2.waitKey(1)  # & 0xff
-    if k == 27:
+    if k == ord('q'):
         break
 cap.release()
 cv2.destroyAllWindows()