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体验新版 GitCode,发现更多精彩内容 >>
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81361f1d
编写于
2月 28, 2017
作者:
Y
Yuanpeng
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差异文件
Translate Provide Data.
上级
0070052d
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1
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recognize_digits/README.en.md
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recognize_digits/README.en.md
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81361f1d
...
...
@@ -264,7 +264,7 @@ Execute the following command to download [MNIST](http://yann.lecun.com/exdb/mni
|train-images-idx3-ubyte| Training images, 60,000 |
|train-labels-idx1-ubyte| Training labels, 60,000 |
|t10k-images-idx3-ubyte | Evaluation images, 10,000 |
|t10k-labels-idx1-ubyte | Evaluation labels
,
10,000 |
|t10k-labels-idx1-ubyte | Evaluation labels
,
10,000 |
Users can randomly generate 10 images with the following script (Refer to Fig. 1.)
...
...
@@ -305,6 +305,39 @@ def process(settings, filename): # settings is not used currently.
yield
{
"pixel"
:
images
[
i
,
:],
'label'
:
labels
[
i
]}
```
### Provide data for PaddlePaddle
We use python interface to convey data to system.
`mnist_provider.py`
shows a complete example for MNIST data.
```
python
# Define a py data provider
@
provider
(
input_types
=
{
'pixel'
:
dense_vector
(
28
*
28
),
'label'
:
integer_value
(
10
)})
def
process
(
settings
,
filename
):
# settings is not used currently.
# Open image file
with
open
(
filename
+
"-images-idx3-ubyte"
,
"rb"
)
as
f
:
# Read first 4 parameters. magic is data format. n is number of data, rows and cols are number of rows and columns, respectively
magic
,
n
,
rows
,
cols
=
struct
.
upack
(
">IIII"
,
f
.
read
(
16
))
# With empty string as a unit, read data one by one
images
=
np
.
fromfile
(
f
,
'ubyte'
,
count
=
n
*
rows
*
cols
).
reshape
(
n
,
rows
,
cols
).
astype
(
'float32'
)
# Normalize data of [0, 255] to [-1,1]
images
=
images
/
255.0
*
2.0
-
1.0
# Open label file
with
open
(
filename
+
"-labels-idx1-ubyte"
,
"rb"
)
as
l
:
# Read first two parameters
magic
,
n
=
struct
.
upack
(
">II"
,
l
.
read
(
8
))
# With empty string as a unit, read data one by one
labels
=
np
.
fromfile
(
l
,
'ubyte'
,
count
=
n
).
astype
(
"int"
)
for
i
in
xrange
(
n
):
yield
{
"pixel"
:
images
[
i
,
:],
'label'
:
labels
[
i
]}
```
## 模型配置说明
...
...
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