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November 2021 Blimp Competition
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Shahrul Kamil bin Hassan
November 2021 Blimp Competition
Commits
848b9923
Commit
848b9923
authored
3 years ago
by
Zhaoliang Zheng
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Code/Ball_Detection/PyTorch_with_ESPCAM/imageTread_AT.py
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Code/Ball_Detection/PyTorch_with_ESPCAM/imageTread_AT.py
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848b9923
import
cv2
from
urllib.request
import
urlopen
,
Request
import
numpy
as
np
import
time
import
apriltag
def
nothing
(
x
):
pass
detector
=
apriltag
.
Detector
()
if
__name__
==
"
__main__
"
:
#change the IP address below according to the
#IP shown in the Serial monitor of Arduino code
# url='http://192.168.4.1/cam-hi.jpg'
# url='http://192.168.1.107/cam-hi.jpg'
url
=
'
http://192.168.4.1/cam-mid.jpg
'
# cv2.namedWindow("live transmission", cv2.WINDOW_AUTOSIZE)
cv2
.
namedWindow
(
"
live transmission
"
,
cv2
.
WINDOW_NORMAL
)
while
True
:
header
=
{
"
User-Agent
"
:
"
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36.
"
}
req
=
Request
(
url
,
headers
=
header
)
img_resp
=
urlopen
(
req
,
timeout
=
60
)
imgnp
=
np
.
array
(
bytearray
(
img_resp
.
read
()),
dtype
=
np
.
uint8
)
frame
=
cv2
.
imdecode
(
imgnp
,
-
1
)
gray_image
=
cv2
.
cvtColor
(
frame
,
cv2
.
COLOR_BGR2GRAY
)
#print(len(gray_image.shape))
h
,
w
,
_
=
frame
.
shape
results
=
detector
.
detect
(
gray_image
)
# loop over the AprilTag detection results
for
r
in
results
:
# extract the bounding box (x, y)-coordinates for the AprilTag
# and convert each of the (x, y)-coordinate pairs to integers
(
ptA
,
ptB
,
ptC
,
ptD
)
=
r
.
corners
ptB
=
(
int
(
ptB
[
0
]),
int
(
ptB
[
1
]))
ptC
=
(
int
(
ptC
[
0
]),
int
(
ptC
[
1
]))
ptD
=
(
int
(
ptD
[
0
]),
int
(
ptD
[
1
]))
ptA
=
(
int
(
ptA
[
0
]),
int
(
ptA
[
1
]))
# draw the bounding box of the AprilTag detection
cv2
.
line
(
frame
,
ptA
,
ptB
,
(
0
,
255
,
0
),
5
)
cv2
.
line
(
frame
,
ptB
,
ptC
,
(
0
,
255
,
0
),
5
)
cv2
.
line
(
frame
,
ptC
,
ptD
,
(
0
,
255
,
0
),
5
)
cv2
.
line
(
frame
,
ptD
,
ptA
,
(
0
,
255
,
0
),
5
)
# draw the center (x, y)-coordinates of the AprilTag
(
cX
,
cY
)
=
(
int
(
r
.
center
[
0
]),
int
(
r
.
center
[
1
]))
cv2
.
circle
(
frame
,
(
cX
,
cY
),
5
,
(
0
,
0
,
255
),
-
1
)
# draw the tag family on the image
tagFamily
=
r
.
tag_family
.
decode
(
"
utf-8
"
)
cv2
.
putText
(
frame
,
tagFamily
,
(
ptA
[
0
],
ptA
[
1
]
-
15
),
cv2
.
FONT_HERSHEY_SIMPLEX
,
0.5
,
(
0
,
255
,
0
),
2
)
print
(
"
[INFO] tag family: {}
"
.
format
(
tagFamily
))
# show the output image after AprilTag detection
cv2
.
imshow
(
"
Image
"
,
frame
)
key
=
cv2
.
waitKey
(
5
)
if
key
==
ord
(
'
q
'
):
break
#cv2.destroyAllWindows()
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