python - 可视化特征图: IndexError: too many indices for array

Question

在学习完本教程之后，我将尝试可视化特征图。
我的模型如下所示:

model.summary()
Model: "model_3"
__________________________________________________________________________________________________
Layer (type)                    Output Shape         Param #     Connected to                     
==================================================================================================
input_5 (InputLayer)            [(None, 224, 224, 3) 0                                            
__________________________________________________________________________________________________
efficientnet-b0 (Functional)    (None, 7, 7, 1280)   4049564     input_5[0][0]                    
__________________________________________________________________________________________________
flatten_4 (Flatten)             (None, 62720)        0           efficientnet-b0[0][0]            
__________________________________________________________________________________________________
branch_0_Dense_16000 (Dense)    (None, 256)          16056576    flatten_4[0][0]                  
__________________________________________________________________________________________________
branch_1_Dense_16000 (Dense)    (None, 256)          16056576    flatten_4[0][0]                  
__________________________________________________________________________________________________
branch_2_Dense_16000 (Dense)    (None, 256)          16056576    flatten_4[0][0]                  
__________________________________________________________________________________________________
branch_3_Dense_16000 (Dense)    (None, 256)          16056576    flatten_4[0][0]                  
__________________________________________________________________________________________________
branch_4_Dense_16000 (Dense)    (None, 256)          16056576    flatten_4[0][0]                  
__________________________________________________________________________________________________
branch_5_Dense_16000 (Dense)    (None, 256)          16056576    flatten_4[0][0]                  
__________________________________________________________________________________________________
branch_6_Dense_16000 (Dense)    (None, 256)          16056576    flatten_4[0][0]                  
__________________________________________________________________________________________________
branch_0_output (Dense)         (None, 35)           8995        branch_0_Dense_16000[0][0]       
__________________________________________________________________________________________________
branch_1_output (Dense)         (None, 35)           8995        branch_1_Dense_16000[0][0]       
__________________________________________________________________________________________________
branch_2_output (Dense)         (None, 35)           8995        branch_2_Dense_16000[0][0]       
__________________________________________________________________________________________________
branch_3_output (Dense)         (None, 35)           8995        branch_3_Dense_16000[0][0]       
__________________________________________________________________________________________________
branch_4_output (Dense)         (None, 35)           8995        branch_4_Dense_16000[0][0]       
__________________________________________________________________________________________________
branch_5_output (Dense)         (None, 35)           8995        branch_5_Dense_16000[0][0]       
__________________________________________________________________________________________________
branch_6_output (Dense)         (None, 35)           8995        branch_6_Dense_16000[0][0]       
__________________________________________________________________________________________________
concatenate_4 (Concatenate)     (None, 245)          0           branch_0_output[0][0]            
                                                                 branch_1_output[0][0]            
                                                                 branch_2_output[0][0]            
                                                                 branch_3_output[0][0]            
                                                                 branch_4_output[0][0]            
                                                                 branch_5_output[0][0]            
                                                                 branch_6_output[0][0]            
__________________________________________________________________________________________________
reshape_4 (Reshape)             (None, 7, 35)        0           concatenate_4[0][0]              
==================================================================================================
Total params: 116,508,561
Trainable params: 116,466,545
Non-trainable params: 42,016

我现在想可视化索引为10的图层: 10 branch_0_output (None, 35)

3 branch_0_Dense_16000 (None, 256)
4 branch_1_Dense_16000 (None, 256)
5 branch_2_Dense_16000 (None, 256)
6 branch_3_Dense_16000 (None, 256)
7 branch_4_Dense_16000 (None, 256)
8 branch_5_Dense_16000 (None, 256)
9 branch_6_Dense_16000 (None, 256)
10 branch_0_output (None, 35)
11 branch_1_output (None, 35)
12 branch_2_output (None, 35)
13 branch_3_output (None, 35)
14 branch_4_output (None, 35)
15 branch_5_output (None, 35)
16 branch_6_output (None, 35)

我遵循了教程中所述的代码，对图像进行了预处理，现在我想绘制此层的35个(？)特征图:
我在教程中使用了代码，并修改了平方数，这里是1，但是我尝试了几次:

# plot all 35 maps
square = 1
ix = 1
for _ in range(square):
    for _ in range(square):
        # specify subplot and turn of axis
        ax = pyplot.subplot(square, square, ix)
        ax.set_xticks([])
        ax.set_yticks([])
        # plot filter channel in grayscale
        pyplot.imshow(feature_maps[0, :, :, ix-1], cmap='gray')
        ix += 1
# show the figure
pyplot.show()

无论尝试多少电话，我都会收到以下错误消息:

---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-28-4c1f464f6978> in <module>()
      9                 ax.set_yticks([])
     10                 # plot filter channel in grayscale
---> 11                 pyplot.imshow(feature_maps[0, :, ix-1], cmap='gray')
     12                 ix += 1
     13 # show the figure

IndexError: too many indices for array

有人可以帮我修改一下吗？
非常感谢!

Answer 1

该错误在第11行显示too many indices for array。之所以发生这种情况，是因为您在要素图中错误地传递了索引。在这里，您要在正方形为1的情况下尝试在1 * 1网格中绘制35张 map 。
假设您需要绘制64映射，那么我们将使用square = 8，然后输出将是一个8 * 8的网格。