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imported cv2 as cv #26

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imported cv2 as cv #26

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14 changes: 7 additions & 7 deletions 03-Open-Camera/cv2_capture_live_video_from_camera.py
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Original file line number Diff line number Diff line change
@@ -1,22 +1,22 @@
import cv2
import cv2 as cv

# 1.打开摄像头
capture = cv2.VideoCapture(2)
capture = cv.VideoCapture(2)

# 2.获取捕获的分辨率
width, height = capture.get(3), capture.get(4)
print(width, height)
# 以原分辨率的一倍来捕获，
# 参数1可以直接写数字，或者OpenCV符号表示
capture.set(cv2.CAP_PROP_FRAME_WIDTH, width * 2)
capture.set(cv2.CAP_PROP_FRAME_HEIGHT, height * 2)
capture.set(cv.CAP_PROP_FRAME_WIDTH, width * 2)
capture.set(cv.CAP_PROP_FRAME_HEIGHT, height * 2)

while(True):
# 获取一帧
ret, frame = capture.read()
# 将这帧转换为灰度图
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
gray = cv.cvtColor(frame, cv.COLOR_BGR2GRAY)

cv2.imshow('frame', gray)
if cv2.waitKey(1) == ord('q'):
cv.imshow('frame', gray)
if cv.waitKey(1) == ord('q'):
break