[Python] Invalid Argument Error During Image Normalization Process

I've tried making my image variable a raw string, but no matter what, I still get an invalid argument error. I know my image paths are correct, and I know they use slashes but I thought os.path.join meant converting to a raw string wasn't necessary. At this point, I'm confused as to what to do.

# Path to images root folder
images_path = "ADNI1Complete 1Yr 1.5T"

# Function to normalize an image
def normalize_image(image_path):
try:
# Load image
nifti_image = nib.load(image_path)
image_data = nifti_image.get_fdata()

# Normalize image
img_min = image_data.min()
img_max = image_data.max()
normalized_image = (image_data - img_min) / (img_max - img_min)

# Save normalized image
nifti_image = nib.Nifti1Image(normalized_image, nifti_image.affine, nifti_image.header)
nib.save(nifti_image, image_path)
except Exception as e:
print(f"Error processing {image_path}: {e}")


# Normalize all the images
for root, dirs, files in os.walk(images_path):
for file in files:
if file.endswith(".nii"):
image_path = os.path.join(root, file)
normalize_image(image_path)

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