我正在尝试从图像中识别文本,然后输出文本; 然而,这个错误吐出:
Traceback (most recent call last): File "C:/Users/Benji's Beast/AppData/Local/Programs/Python/Python37-32/imageDet.py", line 41, in print(get_string(src_path + "cont.jpg") ) File "C:/Users/Benji's Beast/AppData/Local/Programs/Python/Python37-32/imageDet.py", line 15, in get_string img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) cv2.error: OpenCV(3.4.4) C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:181: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
图像分辨率为 1371x51。 我曾尝试将 src_path 上的“/”更改为“\”,但这没有用。 有什么想法吗?
这是我的代码:
import cv2
import numpy as np
import pytesseract
from PIL import Image
from pytesseract import image_to_string
# Path of working folder on Disk
src_path = "C:/Users/Benji's Beast/Desktop/image.PNG"
def get_string(img_path):
# Read image with opencv
img = cv2.imread(img_path)
# Convert to gray
img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
# Apply dilation and erosion to remove some noise
kernel = np.ones((1, 1), np.uint8)
img = cv2.dilate(img, kernel, iterations=1)
img = cv2.erode(img, kernel, iterations=1)
# Write image after removed noise
cv2.imwrite(src_path + "removed_noise.png", img)
# Apply threshold to get image with only black and white
#img = cv2.adaptiveThreshold(img, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY, 31, 2)
# Write the image after apply opencv to do some ...
cv2.imwrite(src_path + "thres.png", img)
# Recognize text with tesseract for python
result = pytesseract.image_to_string(Image.open(src_path + "thres.png"))
# Remove template file
#os.remove(temp)
return result
print('--- Start recognize text from image ---')
print(get_string(src_path + "cont.jpg") )
print("------ Done -------")
我不知道如何解决这个问题, 谢谢。
最佳答案
这意味着您正在将未初始化的变量传递给
> cv2.cvtColor()
在这条语句之后:
# Read image with opencv
img = cv2.imread(img_path)
你能尝试在传递给 cv2.cvtColor() 函数之前打印 img 变量吗
> print(img) or print(img.shape)
确保读取图像的函数调用成功
关于python - (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor' with cv::imread,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53926657/