How to resize an image and convert it to byte array

Assume that the API that you work, like the AWS Rekognition, takes as input images in a byte format with a size limit. Thus, you may need to resize the image and then to convert it to a byte array. Let’s see how we can do it:

from PIL import Image
import io


photo = 'my_image.jpg'

#open the image
img = Image.open(photo, mode='r')

# resize the image
img = img.resize((300,300))
    
byteIO = io.BytesIO()
img.save(byteIO, format='PNG')
byteArr = byteIO.getvalue()