1、opencv相机参数列表
enum VideoCaptureProperties { CAP_PROP_POS_MSEC =0, //!< Current position of the video file in milliseconds. CAP_PROP_POS_FRAMES =1, //!< 0-based index of the frame to be decoded/captured next. CAP_PROP_POS_AVI_RATIO =2, //!< Relative position of the video file: 0=start of the film, 1=end of the film. CAP_PROP_FRAME_WIDTH =3, //!< Width of the frames in the video stream. CAP_PROP_FRAME_HEIGHT =4, //!< Height of the frames in the video stream. CAP_PROP_FPS =5, //!< Frame rate. CAP_PROP_FOURCC =6, //!< 4-character code of codec. see VideoWriter::fourcc . CAP_PROP_FRAME_COUNT =7, //!< Number of frames in the video file. CAP_PROP_FORMAT =8, //!< Format of the %Mat objects returned by VideoCapture::retrieve(). CAP_PROP_MODE =9, //!< Backend-specific value indicating the current capture mode. CAP_PROP_BRIGHTNESS =10, //!< Brightness of the image (only for those cameras that support). CAP_PROP_CONTRAST =11, //!< Contrast of the image (only for cameras). CAP_PROP_SATURATION =12, //!< Saturation of the image (only for cameras). CAP_PROP_HUE =13, //!< Hue of the image (only for cameras). CAP_PROP_GAIN =14, //!< Gain of the image (only for those cameras that support). CAP_PROP_EXPOSURE =15, //!< Exposure (only for those cameras that support). CAP_PROP_CONVERT_RGB =16, //!< Boolean flags indicating whether images should be converted to RGB. CAP_PROP_WHITE_BALANCE_BLUE_U =17, //!< Currently unsupported. CAP_PROP_RECTIFICATION =18, //!< Rectification flag for stereo cameras (note: only supported by DC1394 v 2.x backend currently). CAP_PROP_MONOCHROME =19, CAP_PROP_SHARPNESS =20, CAP_PROP_AUTO_EXPOSURE =21, //!< DC1394: exposure control done by camera, user can adjust reference level using this feature. CAP_PROP_GAMMA =22, CAP_PROP_TEMPERATURE =23, CAP_PROP_TRIGGER =24, CAP_PROP_TRIGGER_DELAY =25, CAP_PROP_WHITE_BALANCE_RED_V =26, CAP_PROP_ZOOM =27, CAP_PROP_FOCUS =28, CAP_PROP_GUID =29, CAP_PROP_ISO_SPEED =30, CAP_PROP_BACKLIGHT =32, CAP_PROP_PAN =33, CAP_PROP_TILT =34, CAP_PROP_ROLL =35, CAP_PROP_IRIS =36, CAP_PROP_SETTINGS =37, //!< Pop up video/camera filter dialog (note: only supported by DSHOW backend currently. The property value is ignored) CAP_PROP_BUFFERSIZE =38, CAP_PROP_AUTOFOCUS =39 };2、修改及读取相机参数，修改用cap.set，读取用cap.get
python示例：
import cv2 #选择摄像头号，一般从 0 开始 cap = cv2.VideoCapture(0) #先设置参数，然后读取参数 cap.set(3,1280) cap.set(4,1024) cap.set(15, -7) print("width={}".format(cap.get(3))) print("height={}".format(cap.get(4))) print("exposure={}".format(cap.get(15))) while True: ret, img = cap.read() cv2.imshow("input", img) # 按 ESC 键退出 key = cv2.waitKey(10) if key == 27: break cv2.destroyAllWindows() cv2.VideoCapture(0).release()
