Question

我一直在尝试运行以下代码，但它确实在运行，但我的疑问是对于cv2.Videocapture（0），0是我的内置摄像机，因此我应该在cv2.VideoCapture（）中为左和右使用什么值代码中以从相机提取左右框架。

import numpy as np
import cv2

LEFT_PATH = "capture/left/{:06d}.jpg"
RIGHT_PATH = "capture/right/{:06d}.jpg"

CAMERA_WIDTH = 1280
CAMERA_HEIGHT = 720

# TODO: Use more stable identifiers
left = cv2.VideoCapture(0)
right = cv2.VideoCapture(1)

# Increase the resolution
left.set(cv2.CAP_PROP_FRAME_WIDTH, CAMERA_WIDTH)
left.set(cv2.CAP_PROP_FRAME_HEIGHT, CAMERA_HEIGHT)
right.set(cv2.CAP_PROP_FRAME_WIDTH, CAMERA_WIDTH)
right.set(cv2.CAP_PROP_FRAME_HEIGHT, CAMERA_HEIGHT)

# Use MJPEG to avoid overloading the USB 2.0 bus at this resolution
left.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc(*"MJPG"))
right.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc(*"MJPG"))

# The distortion in the left and right edges prevents a good calibration, so
# discard the edges
CROP_WIDTH = 960
def cropHorizontal(image):
return image[:,
        int((CAMERA_WIDTH-CROP_WIDTH)/2):
        int(CROP_WIDTH+(CAMERA_WIDTH-CROP_WIDTH)/2)]

frameId = 0

# Grab both frames first, then retrieve to minimize latency between cameras
while(True):
   if not (left.grab() and right.grab()):
     print("No more frames")
     break

    _, leftFrame = left.retrieve()
    leftFrame = cropHorizontal(leftFrame)
    _, rightFrame = right.retrieve()
    rightFrame = cropHorizontal(rightFrame)

    cv2.imwrite(LEFT_PATH.format(frameId), leftFrame)
    cv2.imwrite(RIGHT_PATH.format(frameId), rightFrame)

    cv2.imshow('left', leftFrame)
    cv2.imshow('right', rightFrame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

    frameId += 1

left.release()
right.release()
cv2.destroyAllWindows()

使用立体声相机捕获左右图像时出现错误。

0 个答案: