Resize Error

[mucmch]

Image resizing errors on Pillow v.10.4.0, while it ran smoothly in older versions (10.3.0, 9.3.0).

Sample Code

from io import BytesIO
from PIL import Image
import matplotlib.pyplot as plt
import numpy as np
from PIL.Image import Resampling


def create_test_image():
    file = BytesIO()
    image = Image.new('RGBA', size=(50, 50), color=(155, 0, 0))
    image.save(file, 'png')
    file.name = 'test.png'
    file.seek(0)
    return file


source_file = create_test_image()

fig, ax = plt.subplots()
wm = Image.open(source_file)
wm_size = np.array(wm.size)
max_size = fig.get_size_inches() * fig.dpi * 0.6  # NOQA
scaling_factor = min(max_size / wm_size)

img_size = (wm_size * scaling_factor).astype(int)
wmr = wm.resize(img_size, Resampling.LANCZOS)

Error Log

Traceback (most recent call last):
...
File "...\scratches\scratch.py", line 26, in
wmr = wm.resize(img_size, Resampling.LANCZOS)
File "...\anaconda3\envs\dev\lib\site-packages\PIL\Image.py", line 2297, in resize
if self.size == size and box == (0, 0) + self.size:
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

What are your OS, Python and Pillow versions?

• OS: Windows 11 Pro / Gitlab Servers
• Python: 3.10.8
• Pillow: 10.4.0

[radarhere]

Hi. This is a duplicate of #8195

We weren't testing for users who used NumPy and resize() in this way. The next version of Pillow will have that functionality again, thanks to #8201.

In the meantime, wm.resize(tuple(img_size), Resampling.LANCZOS) should fix your problem.

[mucmch]

Thanks for the quick feedback and sorry for the duplicate.