Image data of dtype object cannot be converted to float

This error occurs when you try to perform a mathematical operation on an array of images that are not in a numerical format, such as strings or objects.

To fix this error, you need to ensure that the image data is in a numerical format, such as float or int. You can do this by converting the image data to a numerical format using the astype() function. For example:

import numpy as np
import cv2

# Load image
img = cv2.imread('image.jpg')

# Convert image data to float
img = img.astype(np.float32)

# Perform mathematical operation on image
result = img * 2.0

In the above example, we first load the image using OpenCV's imread() function. We then convert the image data to a float format using the astype() function. Finally, we perform a multiplication operation on the image data to demonstrate that it is now in a numerical format.