Question

我想添加一些文本以显示在网络摄像头的视频上，但我似乎听不到。我之前使用Opencv在图像中添加了文本，但是视频中的方法似乎有所不同，所以我该怎么做。这是我的网络摄像头脚本：

import cv2
import numpy as np

# Create a VideoCapture object and read from input file
# If the input is the camera, pass 0 instead of the video file name
cap = cv2.VideoCapture(0)

# Check if camera opened successfully
if (cap.isOpened()== False): 
  print("Error opening video stream or file")

# Read until video is completed
while(cap.isOpened()):
  # Capture frame-by-frame
  ret, frame = cap.read()
  if ret == True:

    # Display the resulting frame
    cv2.imshow('Frame',frame)

    # Press Q on keyboard to  exit
    if cv2.waitKey(1) & 0xFF == ord('q'):
      break

  # Break the loop
  else: 
    break

# When everything done, release the video capture object
cap.release()

# Closes all the frames
cv2.destroyAllWindows()

Answer 1

看看OpenCV's docs about putText。这是我做的一个快速技巧，目的是显示一些边界框标签：

<form id='main'>

  i1: "#333", i2: "#000"<input id='i0' type='radio' name='rad'><br> i1: "#333"<input id='i1' type='radio' name='rad'> <br> i2: "#000"<input id='i2' type='radio' name='rad'> <br> {}
  <input id='i3' type='radio' name='rad'> <br>

</form>

在您的代码中应执行以下操作：

wait.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//."));

您是否以某种方式在调用imshow之后绘制了？我看不出视频的行为有何不同。

Opencv如何在视频上叠加文字

1 个答案: