# How to debug a perspective error
# Normal logs
This is an example log.
2020-06-03 00:44:46.221 | INFO | vanish_point: ( 646, -1736)
2020-06-03 00:44:46.222 | INFO | distant_point: (-2321, -1736)
2020-06-03 00:44:46.266 | INFO | 0.235s _ Horizontal: 5 (7 inner, 3 edge)
2020-06-03 00:44:46.266 | INFO | Edges: / \ Vertical: 9 (10 inner, 3 edge)
2020-06-03 00:44:46.273 | INFO | Center grid: (3, 1)
2020-06-03 00:44:46.493 | INFO | -- -- -- -- -- 2M -- --
2020-06-03 00:44:46.501 | INFO | MY -- -- MY -- -- 3M --
2020-06-03 00:44:46.501 | INFO | -- -- FL -- -- -- -- --
2020-06-03 00:44:46.501 | INFO | -- 1L -- MY -- 2L --
# Too few grid lines
This may happens when it detected too few grid lines.
File "AzurLaneAutoScript\module\map\camera.py", line 114, in update
self.grids = Grids(self.device.image, config=self.config)
File "AzurLaneAutoScript\module\map\grids.py", line 19, in __init__
super().__init__(image, config)
File "AzurLaneAutoScript\module\map\perspective.py", line 81, in __init__
self.crossings = self.horizontal.cross(self.vertical)
File "AzurLaneAutoScript\module\map\perspective_items.py", line 170, in cross
points = np.vstack(self.cross_two_lines(self, other))
File "lib\site-packages\numpy\core\shape_base.py", line 234, in vstack
return _nx.concatenate([atleast_2d(_m) for _m in tup], 0)
File "lib\site-packages\numpy\core\shape_base.py", line 234, in <listcomp>
return _nx.concatenate([atleast_2d(_m) for _m in tup], 0)
File "AzurLaneAutoScript\module\map\perspective_items.py", line 163, in cross_two_lines
for rho1, sin1, cos1 in zip(lines1.rho, lines1.sin, lines1.cos):
AttributeError: 'Lines' object has no attribute 'rho'
File "AzurLaneAutoScript\module\map\camera.py", line 114, in update
self.grids = Grids(self.device.image, config=self.config)
File "AzurLaneAutoScript\module\map\grids.py", line 19, in __init__
super().__init__(image, config)
File "AzurLaneAutoScript\module\map\perspective.py", line 98, in __init__
self.horizontal, inner=inner_h.group(), edge=edge_h
File "AzurLaneAutoScript\module\map\perspective.py", line 352, in line_cleanse
clean = self.mid_cleanse(origin, is_horizontal=lines.is_horizontal, threshold=threshold)
File "AzurLaneAutoScript\module\map\perspective.py", line 346, in mid_cleanse
mids = convert_to_y(mids)
File "AzurLaneAutoScript\module\map\perspective.py", line 277, in convert_to_y
return Points([[x, self.config.SCREEN_CENTER[1]] for x in xs], config=self.config) \
File "AzurLaneAutoScript\module\map\perspective_items.py", line 15, in __init__
self.x, self.y = self.points.T
ValueError: not enough values to unpack (expected 2, got 0)
Try reduce the threshold of cv2.HoughLines. Default is 75.
Lower threshold means more lines.
INTERNAL_LINES_HOUGHLINES_THRESHOLD = 40
EDGE_LINES_HOUGHLINES_THRESHOLD = 40
Then you should also lower this and make a closer fit to the lines.
Lower means closer fit, ignore more wrong lines.
COINCIDENT_POINT_ENCOURAGE_DISTANCE = 1.5
# Camera outside map
File "AzurLaneAutoScript-master\module\map\camera.py", line 114, in update
self.grids = Grids(self.device.image, config=self.config)
File "AzurLaneAutoScript-master\module\map\grids.py", line 19, in __init__
super().__init__(image, config)
File "AzurLaneAutoScript-master\module\map\perspective.py", line 98, in __init__
self.horizontal, inner=inner_h.group(), edge=edge_h
File "AzurLaneAutoScript-master\module\map\perspective.py", line 383, in line_cleanse
raise PerspectiveError('Camera outside map: to the %s' % ('upper' if lines.is_horizontal else 'right'))
module.exception.PerspectiveError: Camera outside map: to the upper
Alas can not handle if camera is not focusing on any map grid, it will swipe back if catches Camera outside map. This may happens when some inner lines are detected as edge lines.
Try adjust the parameter of scipy.signal.find_peaks, the height value.
- height Lower means detect lighter lines, 255 means pure black.
- width Line width, in pixels.
- prominence Line needs to be how much darker than surrounding pixels.
- distance Minimum distance between two detected point on line.
- wlen Maximum amount of data to be processed in one time.
Know more about these parameters here (opens new window)
INTERNAL_LINES_FIND_PEAKS_PARAMETERS = {
'height': (150, 255 - 24),
'width': (0.9, 10),
'prominence': 10,
'distance': 35,
}
EDGE_LINES_FIND_PEAKS_PARAMETERS = {
'height': (255 - 24, 255),
'prominence': 10,
'distance': 50,
'width': (0, 10),
'wlen': 1000
}
# Coincident point unexpected
2020-05-31 20:04:47.397 | INFO | Horizontal coincident point unexpected: [-92.817316 141.99589405]
2020-05-31 20:04:48.509 | INFO | Vertical coincident point unexpected: [-692.01967461 141.68981244]
Try adjust the initial value of coincident point. if 141.99589405 is in (129 - 3, 129 + 3), it shut up.
But remember, an incorrect value will ruin everything in map detection, it usually works fine with these logs show up.
MID_DIFF_RANGE_H = (129 - 3, 129 + 3)
MID_DIFF_RANGE_V = (129 - 3, 129 + 3)