Python：使用PIL库读取图像时发生AttributeError

Question

I am trying to work on a set of images using PIL library. I have no problems with importing images, but then, when I try to access size information of the first image from the list I receive an error. Function:

def loadImages(path):

    image_path = listdir(path)
    image_list = []
    for img in image_path:
        image = Image.open(path + img)
        image_list.append(image)

    return image_list

path = 'path/to/images'

images = loadImages(path)
N = len(images)
print("Number of images:", N)

w,h= Image.open(images[0]).size

And the whole error list:

  File "<ipython-input-42-502dda9bf243>", line 1, in <module>
    runfile('C:/Users/user/Desktop/mosaicing/vignetting/alphatrim_vs_distance.py', wdir='C:/Users/user/Desktop/mosaicing/vignetting')

  File "C:\Users\user\anaconda\Anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 705, in runfile
    execfile(filename, namespace)

  File "C:\Users\user\anaconda\Anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 102, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "C:/Users/user/Desktop/mosaicing/vignetting/alphatrim_vs_distance.py", line 39, in <module>
    w,h= Image.open(images[0]).size

  File "C:\Users\user\anaconda\Anaconda3\lib\site-packages\PIL\Image.py", line 2557, in open
    prefix = fp.read(16)

AttributeError: 'MpoImageFile' object has no attribute 'read'

I am working on: pillow 5.0.0 python 3.6.4

Answer 1

Looks like you are trying to open the image twice. Once in loadImage and then you try to open what Image.open returns (which is already an image) later when you do:

w,h = Image.open(images[0]).size

Because images[0] = Image.open(path + listdir(path)[0]) , you are effectively doing the following with the above line:

w,h = Image.open(Image.open(path + listdir(path)[0])).size

You should just be able to do:

w, h = images[0].size