如何从生成器中获取字典输出，该生成器输出带有用于自定义 keras 图像生成器的字典的数组

Posted 2023-02-23

【中文标题】如何从生成器中获取字典输出，该生成器输出带有用于自定义 keras 图像生成器的字典的数组

【英文标题】：How to get the dictionary output from a generator, which outputs an array with a dictionary for custom keras image generator

【发布时间】：2020-09-12 00:52:05

【问题描述】：

我有一个定制的生成器来输出多个值进行预测。我试图让值对应于给定的图像，但没有成功。这是我的输出：

e(array([[[[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]],

     [[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]],

     [[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]],

     ...,

     [[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]],

     [[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]],

     [[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]]],


    [[[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]],

     [[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]],

     [[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]],

     ...,

     [[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]],

     [[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]],

     [[0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.],
      ...,
      [0., 0., 0.],
      [0., 0., 0.],
      [0., 0., 0.]]]], dtype=float16),
 'HourTime': array([0.3848, 0.2375], dtype=float16),
  'MinTime': array([0.633, 0.862], dtype=float16),
  'SecTime': array([0.967, 0.717], dtype=float16))

我的输出来自我的生成器：

input_Size = 128
x,y,xrange,yrange = [136,150,47,47]
def ImGenA(directory, files_Loc, Hour, Min, Sec, batch_size):
    while True:
        batch_paths  = imgId = np.random.choice(a = files_Loc.index, size=batch_size)
        batch_input  = []
        batch_Hr     = []    
        batch_Min    = []
        batch_Sec    = []
        for i in batch_paths:
            img1 = cv2.imread(os.path.join(directory,files_Loc[i]))
            img1 = ndimage.rotate(img1, 210)
            img1 = cv2.resize (img1, (input_Size,input_Size))

            batch_input+=[img1/255]
            batch_Hr += [Hour[i]]
            batch_Min += [Min[i]]
            batch_Sec += [Sec[i]]

            batch_x = np.array(batch_input, dtype='float16')
            batch_y1 = np.array(batch_Hr, dtype='float16')
            batch_y2 = np.array(batch_Min, dtype='float16')
            batch_y3 = np.array(batch_Sec, dtype='float16')
        yield( batch_x, 'HourTime' : batch_y1, 'MinTime': batch_y2, 'SecTime': batch_y3)


    genA = ImGenA(directory=folder, files_Loc= train['ImageLoc'], Hour = train['HrPer'], Min = train['MinPer'], Sec = train['SecPer'],batch_size=2)
    b=next(genA)
    b[0][0] #provides image at position 0, but how do I find the Y output 'HourTime' at the same position?

我在从生成器运行的保存输出中提取“HourTime”时遇到了困难。抱歉，我假设以前有人问过这个问题，但我不确定我怎么找不到答案。

【参考方案1】：

这很简单，一旦你开始工作。

b[1]['HourTime'][0]

为位置 0 提供字典中的“HourTime”。 IE。 0.3848