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()

回溯(最近一次调用)：文件"pycam.py"，第21行，在repeat()文件"pycam.py"，第12行，在repeat c= highgui.cvWaitKey(10) NameError:全局名称'highgui‘没有定义清理摄像机。

Answer 1

新的API有相当多的变化。下面的方法将会起作用：

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()

这是一个更简单、更清晰的语法！

Answer 2

这意味着highgui并不存在。尝试这样导入：from opencv import *。

如果这不起作用，试着检查一下你的opencv安装。