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bc8b6040
编写于
2月 07, 2018
作者:
W
whs
提交者:
GitHub
2月 07, 2018
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Merge pull request #618 from shiwenguo/ctc_reader
add ctc reader
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2738ca10
911e0bb3
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fluid/ocr_recognition/ctc_reader.py
fluid/ocr_recognition/ctc_reader.py
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fluid/ocr_recognition/ctc_reader.py
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bc8b6040
import
os
import
cv2
import
numpy
as
np
from
PIL
import
Image
from
paddle.v2.image
import
load_image
class
DataGenerator
(
object
):
def
__init__
(
self
):
pass
def
train_reader
(
self
,
img_root_dir
,
img_label_list
,
batchsize
):
'''
Reader interface for training.
:param img_root_dir: The root path of the image for training.
:type file_list: str
:param img_label_list: The path of the <image_name, label> file for training.
:type file_list: str
'''
img_label_lines
=
[]
if
batchsize
==
1
:
to_file
=
"tmp.txt"
cmd
=
"cat "
+
img_label_list
+
" | awk '{print $1,$2,$3,$4;}' | shuf > "
+
to_file
print
"cmd: "
+
cmd
os
.
system
(
cmd
)
print
"finish batch shuffle"
img_label_lines
=
open
(
to_file
,
'r'
).
readlines
()
else
:
to_file
=
"tmp.txt"
#cmd1: partial shuffle
cmd
=
"cat "
+
img_label_list
+
" | awk '{printf(
\"
%04d%.4f %s
\\
n
\"
, $1, rand(), $0)}' | sort | sed 1,$((1 + RANDOM % 100))d | "
#cmd2: batch merge and shuffle
cmd
+=
"awk '{printf $2
\"
\"
$3
\"
\"
$4
\"
\"
$5
\"
\"
; if(NR % "
+
str
(
batchsize
)
+
" == 0) print
\"\"
;}' | shuf | "
#cmd3: batch split
cmd
+=
"awk '{if(NF == "
+
str
(
batchsize
)
+
" * 4) {for(i = 0; i < "
+
str
(
batchsize
)
+
"; i++) print $(4*i+1)
\"
\"
$(4*i+2)
\"
\"
$(4*i+3)
\"
\"
$(4*i+4);}}' > "
+
to_file
print
"cmd: "
+
cmd
os
.
system
(
cmd
)
print
"finish batch shuffle"
img_label_lines
=
open
(
to_file
,
'r'
).
readlines
()
def
reader
():
sizes
=
len
(
img_label_lines
)
/
batchsize
for
i
in
range
(
sizes
):
result
=
[]
sz
=
[
0
,
0
]
for
j
in
range
(
batchsize
):
line
=
img_label_lines
[
i
*
batchsize
+
j
]
# h, w, img_name, labels
items
=
line
.
split
(
' '
)
label
=
[
int
(
c
)
for
c
in
items
[
-
1
].
split
(
','
)]
img
=
Image
.
open
(
os
.
path
.
join
(
img_root_dir
,
items
[
2
])).
convert
(
'L'
)
#zhuanhuidu
if
j
==
0
:
sz
=
img
.
size
img
=
img
.
resize
((
sz
[
0
],
sz
[
1
]))
img
=
np
.
array
(
img
)
-
127.5
img
=
img
[
np
.
newaxis
,
...]
result
.
append
([
img
,
label
])
yield
result
return
reader
def
test_reader
(
self
,
img_root_dir
,
img_label_list
):
'''
Reader interface for inference.
:param img_root_dir: The root path of the images for training.
:type file_list: str
:param img_label_list: The path of the <image_name, label> file for testing.
:type file_list: list
'''
def
reader
():
for
line
in
open
(
img_label_list
):
# h, w, img_name, labels
items
=
line
.
split
(
' '
)
label
=
[
int
(
c
)
for
c
in
items
[
-
1
].
split
(
','
)]
img
=
Image
.
open
(
os
.
path
.
join
(
img_root_dir
,
items
[
2
])).
convert
(
'L'
)
img
=
np
.
array
(
img
)
-
127.5
img
=
img
[
np
.
newaxis
,
...]
yield
img
,
label
return
reader
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