使用 keras load_img 函数时，matplotlib as plt 不起作用

Question

我一直在研究这个图像分类（水印检测）任务 我正在尝试加载图像文件夹

from keras.preprocessing.image import load_img
import cv2 
import matplotlib.pyplot as plt
DATADIR = 'F:\IMP.DATA\Task\Watermark_test_data'
CATEGORIES=['Watermark','No Watermark']

for category in CATEGORIES:
        path= os.path.join(DATADIR,category)#path to test folder    
        for img in os.listdir(path):
            img_array = cv2.imread(os.path.dirname(os.path.join(path,img), cv2.IMREAD_GRAYSCALE)
            plt.imshow(img_array,cmap="gray")
            plt.show(img_array)
            break
        break

img = load_img('F:/IMP.DATA/Task/Watermark_test_data/Watermark/1.jpg')
print(type(img))
print(img.format)
print(img.mode)
print(img.size)
img.show()

import numpy as np
import matplotlib.pyplot as plt
from keras.models import Sequential
from keras.layers import Dense,Dropout,Flatten
from keras.layers.convolutional import Conv2D,MaxPooling2D
from keras.utils import np_utils
from keras import backend as K
import os 
import cv2

DATADIR = 'F:\IMP.DATA\Task\Watermark_test_data'
CATEGORIES=['Watermark','No Watermark']

for category in CATEGORIES:
    path= os.path.join(DATADIR,category)#path to test folder    
    for img in os.listdir(path):
        img_array = cv2.imread(os.path.dirname(os.path.join(path,img), cv2.IMREAD_GRAYSCALE)
        plt.imshow(img_array,cmap="gray")
        plt.show(img_array)
        break
    break

我一直在使用 cv2 和 load_img 来加载图像，但在这两种情况下，我在 matplotlib 中都会出错 plt.imshow (函数) 这是我得到的错误

File "<ipython-input-51-2b07cb64d5a1>", line 11
    plt.imshow(img_array,cmap="gray")
      ^
SyntaxError: invalid syntax

我看不出语法有什么问题

Answer 1

SyntaxError 是由该行中缺少右括号引起的：

img_array = cv2.imread(os.path.dirname(os.path.join(path,img), cv2.IMREAD_GRAYSCALE)

在os.path.dirname(os.path.join(path,img)后加)即可解决。