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Martin Manchev
osie
Commits
56f0b922
Commit
56f0b922
authored
Oct 05, 2020
by
Ivan Tyagov
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Add first OCR implementation which can track countours in image.
parent
97a4bb0b
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eggs/osie_plc/osie_ocr.py
eggs/osie_plc/osie_ocr.py
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eggs/osie_plc/osie_ocr.py
0 → 100644
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56f0b922
import
cv2
import
numpy
as
np
def
nothing
(
x
):
# any operation
pass
cap
=
cv2
.
VideoCapture
(
1
)
cv2
.
namedWindow
(
"Trackbars"
)
cv2
.
createTrackbar
(
"L-H"
,
"Trackbars"
,
0
,
180
,
nothing
)
cv2
.
createTrackbar
(
"L-S"
,
"Trackbars"
,
66
,
255
,
nothing
)
cv2
.
createTrackbar
(
"L-V"
,
"Trackbars"
,
134
,
255
,
nothing
)
cv2
.
createTrackbar
(
"U-H"
,
"Trackbars"
,
180
,
180
,
nothing
)
cv2
.
createTrackbar
(
"U-S"
,
"Trackbars"
,
255
,
255
,
nothing
)
cv2
.
createTrackbar
(
"U-V"
,
"Trackbars"
,
243
,
255
,
nothing
)
font
=
cv2
.
FONT_HERSHEY_COMPLEX
while
True
:
_
,
frame
=
cap
.
read
()
hsv
=
cv2
.
cvtColor
(
frame
,
cv2
.
COLOR_BGR2HSV
)
l_h
=
cv2
.
getTrackbarPos
(
"L-H"
,
"Trackbars"
)
l_s
=
cv2
.
getTrackbarPos
(
"L-S"
,
"Trackbars"
)
l_v
=
cv2
.
getTrackbarPos
(
"L-V"
,
"Trackbars"
)
u_h
=
cv2
.
getTrackbarPos
(
"U-H"
,
"Trackbars"
)
u_s
=
cv2
.
getTrackbarPos
(
"U-S"
,
"Trackbars"
)
u_v
=
cv2
.
getTrackbarPos
(
"U-V"
,
"Trackbars"
)
lower_red
=
np
.
array
([
l_h
,
l_s
,
l_v
])
upper_red
=
np
.
array
([
u_h
,
u_s
,
u_v
])
mask
=
cv2
.
inRange
(
hsv
,
lower_red
,
upper_red
)
kernel
=
np
.
ones
((
5
,
5
),
np
.
uint8
)
mask
=
cv2
.
erode
(
mask
,
kernel
)
# Contours detection
if
int
(
cv2
.
__version__
[
0
])
>
3
:
# Opencv 4.x.x
contours
,
_
=
cv2
.
findContours
(
mask
,
cv2
.
RETR_TREE
,
cv2
.
CHAIN_APPROX_SIMPLE
)
else
:
# Opencv 3.x.x
_
,
contours
,
_
=
cv2
.
findContours
(
mask
,
cv2
.
RETR_TREE
,
cv2
.
CHAIN_APPROX_SIMPLE
)
for
cnt
in
contours
:
area
=
cv2
.
contourArea
(
cnt
)
approx
=
cv2
.
approxPolyDP
(
cnt
,
0.02
*
cv2
.
arcLength
(
cnt
,
True
),
True
)
x
=
approx
.
ravel
()[
0
]
y
=
approx
.
ravel
()[
1
]
if
area
>
400
:
cv2
.
drawContours
(
frame
,
[
approx
],
0
,
(
0
,
0
,
0
),
5
)
if
len
(
approx
)
==
3
:
cv2
.
putText
(
frame
,
"Triangle"
,
(
x
,
y
),
font
,
1
,
(
0
,
0
,
0
))
elif
len
(
approx
)
==
4
:
cv2
.
putText
(
frame
,
"Rectangle"
,
(
x
,
y
),
font
,
1
,
(
0
,
0
,
0
))
elif
10
<
len
(
approx
)
<
20
:
cv2
.
putText
(
frame
,
"Circle"
,
(
x
,
y
),
font
,
1
,
(
0
,
0
,
0
))
cv2
.
imshow
(
"Frame"
,
frame
)
cv2
.
imshow
(
"Mask"
,
mask
)
key
=
cv2
.
waitKey
(
1
)
if
key
==
27
:
break
cap
.
release
()
cv2
.
destroyAllWindows
()
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