使用python从视频中识别车牌

Question

enter image description here I am running this code but it has given an error which I am trying to solve. The given code is of car plate recognition from video written in python.

The given error:-

Traceback (most recent call last):   File "Main.py", line 16, in
<module>
     plate_Original, plate_morphEx, edge = preprocessOne(plateFrame, (42,10), True)   File
 "C:\Users\Admin\Desktop\Radar\pythonEdition\Modules\Basic.py", line
 11, in preprocessOne
     plateGray = enhance(cv2.cvtColor(plateFrame, cv2.COLOR_BGR2GRAY)) cv2.error: OpenCV(4.1.2)
 C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:182:
 error: (-215:Assertion failed) !_src.empty() in function
 'cv::cvtColor'

In Main.py:-

    plate_Original, plate_morphEx, edge = preprocessOne(plateFrame, (42,10), True)

In Basic.py:-

def preprocessOne(plateFrame, se_shape, Show = False):
plateOrigin = copy.copy(plateFrame)
plateGray = enhance(cv2.cvtColor(plateFrame, cv2.COLOR_BGR2GRAY))
plateGaussian = cv2.GaussianBlur(plateGray, (5,5), 0)
plateSobel = cv2.Sobel(plateGaussian, -1, 1, 0)
h, plateThresh = cv2.threshold(plateSobel, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_OTSU)

se = cv2.getStructuringElement(cv2.MORPH_RECT, se_shape)
plateMorphEx = cv2.morphologyEx(plateThresh, cv2.MORPH_CLOSE, se)
edge = np.copy(plateThresh)

Answer 1

src.empty() in function cv::cvtColor usually means that the input file is missing. Check the path and content of the video file. Or maybe there is a problem with plateFrame in main.py . Try printing plateFrame and its shape.