python - Opencv:使用 python 导入 highgui

Question

使用以下代码:

import cv

cv.NamedWindow("w1", cv.CV_WINDOW_AUTOSIZE)
camera_index = 0
capture = cv.CaptureFromCAM(camera_index)

def repeat():
  global capture #declare as globals since we are assigning to them now
  global camera_index
  frame = cv.QueryFrame(capture)
  cv.ShowImage("w1", frame)
  c = highgui.cvWaitKey(10)
  if(c=="n"): #in "n" key is pressed while the popup window is in focus
    camera_index += 1 #try the next camera index
    capture = cv.CaptureFromCAM(camera_index)
    if not capture: #if the next camera index didn't work, reset to 0.
        camera_index = 0
        capture = cv.CaptureFromCAM(camera_index)

while True:
    repeat()

追溯(最近的调用最后): 文件“pycam.py”，第 21 行，位于 重复() 重复文件“pycam.py”，第 12 行 c = highgui.cvWaitKey(10)NameError:未定义全局名称“highgui”清理相机。

Answer 1

新的 API 发生了很多变化。以下将起作用:

import cv

cv.NamedWindow("w1", cv.CV_WINDOW_AUTOSIZE)
camera_index = 0
capture = cv.CaptureFromCAM(camera_index)

def repeat():
  global capture #declare as globals since we are assigning to them now
  global camera_index
  frame = cv.QueryFrame(capture)
  cv.ShowImage("w1", frame)
  c = cv.WaitKey(10)
  if(c=="n"): #in "n" key is pressed while the popup window is in focus
    camera_index += 1 #try the next camera index
    capture = cv.CaptureFromCAM(camera_index)
    if not capture: #if the next camera index didn't work, reset to 0.
        camera_index = 0
        capture = cv.CaptureFromCAM(camera_index)

while True:
    repeat()

这是一种更简单、更清晰的语法!