(-215:断言失败)cv::imread函数';cv::cvtColor';中的!_src.Empty()
问题描述
我正在尝试从图像中识别文本,然后将文本输出; 但是,此错误显示为:
回溯(最近一次呼叫): 文件"C:/Users/Benji的Beast/AppData/Local/Programs/Python/Python37-32/imageDet.py",行41,位于 print(get_string(src_path+"cont.jpg")) 文件"C:/Users/Benji的Beast/AppData/Local/Programs/Python/Python37-32/imageDet.py",行15,在GET_STRING中 img=cv2.cvtColor(img,cv2.COLOR_BGR2GRAY) cv2.error:函数‘cv::cvtColor’中的openCV(3.4.4)C:projectsopencv-pythonopencvmodulesimgprocsrccolor.cpp:181:错误:(-215:断言失败)!_src.Empty()
图像分辨率为1371x51。 我尝试将src_path上的"/"更改为"",但没有成功。 有什么想法吗?
以下是我的代码:
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。
解决方案
这表示您正在将未初始化的变量传递给
> cv2.cvtColor()
此语句后:
# Read image with opencv
img = cv2.imread(img_path)
您是否可以在传递给cv2.cvtColor()函数之前尝试打印img变量
> print(img) or print(img.shape)
确保读取图像的函数调用成功
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