我正在使用OpenCV(2.4)和Python(2.7.3)以及Thorlabs的USB摄像头(DC1545M).
我正在对视频流进行一些图像分析,我希望能够从我的视频流中更改一些摄像机参数.令人困惑的是,我能够改变一些相机属性而不是所有相机属性,我不确定我做错了什么.
这是代码,使用Python中的cv2绑定,我可以确认它运行:
import cv2
#capture from camera at location 0
cap = cv2.VideoCapture(0)
#set the width and height, and UNSUCCESSFULLY set the exposure time
cap.set(3,1280)
cap.set(4,1024)
cap.set(15, 0.1)
while True:
ret, img = cap.read()
cv2.imshow("input", img)
#cv2.imshow("thresholded", imgray*thresh2)
key = cv2.waitKey(10)
if key == 27:
break
cv2.destroyAllWindows()
cv2.VideoCapture(0).release()
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作为参考,cap.set()命令中的第一个参数引用了相机属性的枚举,如下所示:
0. CV_CAP_PROP_POS_MSEC Current position of the video file in milliseconds.
1. CV_CAP_PROP_POS_FRAMES 0-based index of the frame to be decoded/captured next.
2. CV_CAP_PROP_POS_AVI_RATIO Relative position of the video …
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