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ba361006
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practice_python_opencv
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practice_python_opencv
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CV_1_Camera.py
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practice_python_opencv
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CV_1_Camera.py
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#使用USB錄影機
import cv2
import numpy as np
cap = cv2.VideoCapture(0)#0為預設 總共可以用0~4號攝影機
# print(cap.isOpened())如果打不開可以用這段程式檢查攝影機有沒有開;True or Fulse
#cap.open()若沒有開起就跟用這行開啟
width = cap.get(cv2.CAP_PROP_FRAME_WIDTH)#取得照片的寬度
height = cap.get(cv2.CAP_PROP_FRAME_HEIGHT)#取得照片的長度
print("Image Size: %d x %d" % (width,height))#印出照片長寬
while(True):#一個無限迴圈,只是為了讓輸入的圖片串流成影片
ret, frame = cap.read() #讀取一張畫面;ret為每次攝影機傳回圖片成功與否,frame為傳回的圖片
# gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)#把照片轉灰階
cv2.imshow('output',frame)#秀出名為'output'的視窗,視窗內的串流影片為frame
if cv2.waitKey(1) & 0xFF == ord('q'): #按q關掉視窗,一定要小寫,因為是ASCII
break
cap.release() #釋放攝影機
cv2.destroyAllWindows() #關閉所有OpenCV的視窗
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