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hsv becomes empty in filter_blue #36

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SpeedrunnerG55 opened this issue Mar 13, 2020 · 0 comments
Open

hsv becomes empty in filter_blue #36

SpeedrunnerG55 opened this issue Mar 13, 2020 · 0 comments

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@SpeedrunnerG55
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I printed hsv right before the cvtColor function call and found it is empty before I get the exception. however, it is not immediately empty. it becomes empty after a few times not being empty.

[]

Exception in thread EDAutopilot:
Traceback (most recent call last):
  File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.6/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/home/speed/Desktop/EDAutopilot/dev_autopilot.py", line 1303, in autopilot
    align()
  File "/home/speed/Desktop/EDAutopilot/dev_autopilot.py", line 1048, in align
    off = get_navpoint_offset()
  File "/home/speed/Desktop/EDAutopilot/dev_autopilot.py", line 827, in get_navpoint_offset
    mask_blue = filter_blue(compass_image)
  File "/home/speed/Desktop/EDAutopilot/dev_autopilot.py", line 731, in filter_blue
    hsv = cv2.cvtColor(hsv, cv2.COLOR_BGR2HSV)
cv2.error: OpenCV(4.2.0) /io/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'

I don't see anything in the function that would cause it to become empty. so I don't know what is going on
jjmcdn added a commit to jjmcdn/EDAutopilot that referenced this issue May 25, 2020
@jjmcdn
get_compass_image: Wrap in a while loop and retry if no screen data f…
2a350c8 
…ound

get_compass_image sometimes ends up with empty data in the compass_image and the screen array following the calculation trying to locate the navigation dot.  The causes an exception in filter_blue() and results in the autopilot failing. This seems to be a result of a bad screen capture providing garbage data, so if we just try again when we notice compass_image is empty, we always end up returning valid data.

ref: skai2#36

Signed-off-by: Joe MacDonald <[email protected]>
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