类型错误:不支持/的操作数类型:'Image' 和 'int' [英] TypeError: unsupported operand type(s) for /: 'Image' and 'int'

问题描述

我想将 PIL Image 对象转换为一个 numpy 数组.我尝试使用以下代码显示错误

I wanted to convert the PIL Image object into a numpy array. I tried using the following codes it showing an error

TypeError Traceback (most recent call last) <ipython-input-133-0898103f22f0> in <module>()
      1 image_path = 'test/28/image_05230.jpg'
----> 2 image = process_image(image_path)
      3 imshow(image)

<ipython-input-129-e036faebfd31> in process_image(image_path)
     24     # normalize
     25     print(type(image))
---> 26     image_arr = np.array(image) / 255
     27     mean = np.array([0.485, 0.456, 0.406])
     28     std_dv = np.array( [0.229, 0.224, 0.225])

TypeError: unsupported operand type(s) for /: 'Image' and 'int'

<小时>

from PIL import Image

image = Image.open(image_path)
image = np.asarray(image) / 255

我也尝试使用此代码 image = np.array(image)/255 它显示相同的错误.(代码如下)

I also tried with this code image = np.array(image) / 255 it's showing the same error. (code below)

from PIL import Image

image = Image.open(image_path)
image = np.array(image) / 255

仅当我在下面的函数中使用上述代码时才会出现此错误

This error occurs only when I used the above code in below function

def convert_pil_to_numpy_array(image_path):
    # Load Image an open the image
    from PIL import Image

    image = Image.open(image_path)
    width = image.size[0]
    height = image.size[1]

    if width > height:
      image.thumbnail((500, 256))
    else:
      image.thumbnail((256, 500))

    left_margin = (image.width - 224) / 2
    lower_margin = (image.height - 224) / 2
    upper_margin = lower_margin + 224
    right_margin = left_margin + 224

    image = image.crop((left_margin, upper_margin, right_margin, lower_margin))

    # normalize
    print(type(image))
    image_arr = np.array(image) / 255
    mean = np.array([0.485, 0.456, 0.406])
    std_dv = np.array( [0.229, 0.224, 0.225])
    image_arr = (image_arr - mean)/std_dv

    return image_arr

推荐答案

既然您已经展示了您实际使用的真实代码:

Now that you presented the real code you are actually using:

• Image.open("path.jpg") 返回
• 在你裁剪之后你会得到

• Image.open("path.jpg") returns <class 'PIL.JpegImagePlugin.JpegImageFile'>
• after your cropping you get a return of <class 'PIL.Image.Image'>

如果您检查裁剪后的图像，您可以看到它只有一个维度，第二个维度为 0:

If you inspect your cropped image, you can see it only has one dimension, the second is 0:

如果您将代码修复为:

def convert_pil_to_numpy_array(image_path):
    # Load Image an open the image
    from PIL import Image

    image = Image.open(image_path)
    width = image.size[0]
    height = image.size[1] 

    image.thumbnail((500, 256) if (width > height) else (256, 500))  

    left_margin = (image.width - 224) / 2
    upper_margin = (image.height - 224) / 2     # fixed
    lower_margin = upper_margin + 224           # fixed
    right_margin = left_margin + 224

    # fixed and renamed so you do not overwrite image all the time - helps debugging
    # now this has 2 dimensions that are non-zero
    image_crop = image.crop((left_margin, upper_margin, right_margin, lower_margin))

    # normalize
    image_arr = np.asarray(image) / 255
    mean = np.mean(image_arr)
    std_dv = np.std( image_arr )
    image_arr = (image_arr - mean)/std_dv 

    return image_crop

代码突然运行没有错误.

the code suddenly runs without errors.

这篇关于类型错误:不支持/的操作数类型:'Image' 和 'int'的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！