cv2.error: OpenCV(4.5.2) .error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'

Question

import cv2 #for image processing
import easygui #to open the filebox
import numpy as np #to store image
import imageio #to read image stored at particular path

import sys
import matplotlib.pyplot as plt
import os
import tkinter as tk
from tkinter import filedialog
from tkinter import *
from PIL import ImageTk, Image



top=tk.Tk()
top.geometry('400x400')
top.title('Cartoonify Your Image !')
top.configure(background='white')
label=Label(top,background='#CDCDCD', font=('calibri',20,'bold'))

def upload():
    ImagePath=easygui.fileopenbox()
    cartoonify(ImagePath)


def cartoonify(ImagePath):
    
    # read the image
    originalmage = cv2.imread(ImagePath)
    
    originalmage = cv2.cvtColor(originalmage, cv2.COLOR_BGR2RGB)
    #print(image)  # image is stored in form of numbers

cv2.error: OpenCV(4.5.2) C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-vi271kac\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'

Answer 1

Check the image address again. This usually happens when the image is not loaded correctly in any way. Try giving the address directly; something like "C:\\test.jpg"

import cv2
im = cv2.imread("WRONG IMAGE ADDRESS.jpg", 1)
im = cv2.cvtColor(im, cv2.COLOR_RGB2GRAY)

---

Update
You can also get the current folder path of your script and load your image from that.
Imagine your files structure are like this:

--RootProject
  |-img.jpg
  |-script.py

Then you can also do something like this:

script.py

    import cv2
    import sys
    im = cv2.imread(sys.path[0]+"/img.jpg", 1)
    im = cv2.cvtColor(im, cv2.COLOR_RGB2GRAY)