Solved – runtimeWarning: overflow encountered in ubyte_scalars warning

In this article, you will learn how to solve runtimeWarning: overflow encountered in ubyte_scalars warning.

Consider the code example below which throws the same warning:

from PIL import Image
 import numpy as np
image1 = np.array(Image.open( "hello1.jpg" ))                   
image2 = np.array(Image.open( "hello2.jpg" ))                  
 temp = image1[ 1 , 1 ]-image2[ 1 , 1 ]    

the correct way of writing the above code is below:

from PIL import Image
import numpy as np
image1 = np.array(Image.open( "hello1.jpg" ))                   
image2 = np.array(Image.open( "hello2.jpg" ))                  
temp = int (image1[ 1 , 1 ])- int (image2[ 1 , 1 ])

Note: When processing an image with python, it can involve addition and subtraction between the pixel values ​​of two images. It’s also worth noting that the pixel value of the image is of the ubyte type, and the data range of the ubyte type is 0~255

You can also completely remove this warning, which isn’t the best idea to do.

to completely remove the runtimeWarning you can just add the following after importing numpy:

import numpy as np
np.seterr(over='ignore')