回答編集履歴
2
test
CHANGED
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@@ -24,6 +24,6 @@
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24
24
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x, y = (2, 2)
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27
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-
view_as_blocks(img, (x, y,
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27
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+
view_as_blocks(img, (x, y, 1)).std((3, 4, 5))
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28
28
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```
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1
修正
test
CHANGED
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@@ -1,5 +1,29 @@
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1
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+
## 1. Numpyの`.reshape()`を用いる方法
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3
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4
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1
5
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```python
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2
6
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7
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x, y = (2, 2)
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8
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3
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-
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9
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img.reshape(img.shape[0]//x, x, img.shape[1]//y, y, 3).std((1, 3))
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4
10
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```
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12
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14
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15
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## 2. Scikit-imageの`view_as_blocks()`を用いる方法
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16
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17
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19
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```python
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from skimage.util import view_as_blocks
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24
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x, y = (2, 2)
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26
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27
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view_as_blocks(img, (x, y, 3)).std((2, 3, 4))
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28
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+
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29
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```
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