AttributeError：'module'对象没有属性'QueryFrame'

I am trying to test to decode a qr code real time using python and openCV 3.0.But now I am getting an error message on my terminal. I tried to search on the internet but I still unable to solve it. Can I know whats the error.

我正在尝试使用python和openCV 3.0进行测试以实时解码qr代码。但现在我在终端上收到错误消息。我试图在互联网上搜索,但我仍然无法解决它。我能知道这个错误吗?

This is my Python code:

这是我的Python代码:

import cv2 as cv

import zbar

def scanner_procces(frame,set_zbar):    
    set_width = 100.0 / 100
    set_height = 90.0 / 100

    coord_x = int(frame.width * (1 - set_width)/2)
    coord_y = int(frame.height * (1 - set_height)/2)
    width = int(frame.width * set_width)
    height = int(frame.height * set_height)

    get_sub = cv.GetSubRect(frame, (coord_x+1, coord_y+1, width-1, height-1))

    cv.Rectangle(frame, (coord_x, coord_y), (coord_x + width, coord_y + height), (255,0,0))

    cm_im = cv.CreateImage((get_sub.width, get_sub.height), cv.IPL_DEPTH_8U, 1)
    cv.ConvertImage(get_sub, cm_im)
    image = zbar.Image(cm_im.width, cm_im.height, 'Y800', cm_im.tostring())

    set_zbar.scan(image)
    for symbol in image:
            print '\033[1;32mResult : %s symbol "%s" \033[1;m' % (symbol.type,symbol.data)

    cv.ShowImage("webcam", frame)
    cv.WaitKey(10)


if __name__ == "__main__":

    cv.namedWindow("webcam", cv.WINDOW_AUTOSIZE)
    capture = cv.VideoCapture(0)
    set_zbar = zbar.ImageScanner()
    while True:
        frame = cv.QueryFrame(capture)
        scanner_procces(frame,set_zbar)

This is the error code:

这是错误代码:

AttributeError: 'module' object has no attribute 'QueryFrame'

This is the traceback message:

这是回溯消息:

init done 
opengl support available 
 select timeout
Traceback (most recent call last):
  File "realtimetestwebcam.py", line 38, in <module>
    scanner_procces(frame,set_zbar)
  File "realtimetestwebcam.py", line 9, in scanner_procces
    coord_x = int(frame.width * (1 - set_width)/2)
AttributeError: 'numpy.ndarray' object has no attribute 'width'

Is it the error because of the opencv version? Thank you.

这是因为opencv版本的错误吗?谢谢。

2 个解决方案

#1

When you use cv2 you should use

当你使用cv2时,你应该使用

cv2.VideoCapture.read

instead of QueryFrame. For more info see here.
You can try this code

而不是QueryFrame。有关详情,请参阅此处。您可以尝试此代码

capture = cv.VideoCapture(0)
set_zbar = zbar.ImageScanner()
while True:
    _,frame = capture.read()

Updated

This error message

此错误消息

AttributeError: 'numpy.ndarray' object has no attribute 'width'

AttributeError:'numpy.ndarray'对象没有属性'width'

you get because that changed the format of the return value. With cv frame was an object with some type, and with cv2 frame is np.ndarray. Instead of width attr you can get its dimensions with shape method. Migration from cv to cv2 is not simple process and requires rewriting of a part of the code.

你得到因为它改变了返回值的格式。 cv框架是一个具有某种类型的对象,而cv2框架是np.ndarray。您可以使用shape方法获取其尺寸,而不是width attr。从cv迁移到cv2并不是一个简单的过程,需要重写部分代码。

#2

I solved it by installing the python-opencv package

我通过安装python-opencv包解决了这个问题

sudo apt-get install python-opencv

That solved my whole problem. Thanks to kvorobiev for helping me all the way.

这解决了我的整个问题。感谢kvorobiev一直帮助我。

#1