class lineFilter(VideoReaderProgram):
# class instance for 2 counting gates
gate = None
# line computation results
greenRate = 0
redRate = 0
# crosses counts
ingoing = 0
outgoing = 0
# when green/red rate if over threshold, first/second char passes to G/R
# third flag is i or o indicating ingoing/outgoing person
# __ means "nothing"
# G_ = someone begins to cut in "in" direction -> G_ , i
# then, we must have GR, then _R, then __ back -> +1 in
# any other combination means the person went back, or there was several persons crossing in opposite directions
# _R = someone begins to cut in "out" direction -> _R, o
# then, we must have GR, then G_, then __ back -> +1 out
lineState = "__"
dirState = "_"
# try to summarize various possibilities in a matrix
stateMachine = {
# "line,dir,newState" -> (new dirState, counter to update) (0=none, -1 = out, +1 = in)
"__,_,G_": ("i", 0), # start cross in
"__,_,_R": ("o", 0), # start cross out
"__,_,GR": ("?", 0), # start cross quickly => can't say in which direction
"G_,i,__": ("_", 0), # someone went back just before the door
"G_,i,GR": ("i", 0), # continue to cross "in"
"G_,i,_R": ("i", 1), # a mouse crosses in ?
"GR,i,G_": ("i", 0), # someone went back while thru the door
"GR,i,_R": ("i", 1), # someone ending to cross in
"GR,i,__": ("_", 1), # someone ending to cross in quickly
"_R,i,__": ("_", 0), # someone ended to cross in (already counted)
"_R,o,__": ("_", 0), # someone went back just before the door
"_R,o,GR": ("o", 0), # continue to cross "out"
"_R,o,G_": ("o",-1), # a mouse crosses out ?
"GR,o,_R": ("o", 0), # someone went back while thru the door
"GR,o,G_": ("o",-1), # someone ending to cross out
"GR,o,__": ("_",-1), # someone ending to cross out quickly
"G_,o,__": ("_", 0), # someone ended to cross out (already counted)
# approximation : if someone crosses the 2 lines quick then go back, we count it as crossing
"GR,?,G_": ("o",-1), # started cross quickly, but we detected he's going out
"GR,?,_R": ("i", 1), # started cross quickly, but we detected he's going in
}
# any color of any pixel varying of more than this value is considered as covering background
colorThreshold = 50 # TODO : add argument
# if ratio of "covering" pixels in a line is more than this threshold, we consider
# than someone is crossing it
lineThreshold = 10 # TODO : add argument
# handle mouse to redraw red and green lines
drawing = None
def mouseHandler(self, event, x, y, flags, param):
if event == cv2.EVENT_MBUTTONUP:
self.intersectPix(x, y)
elif event == cv2.EVENT_LBUTTONDOWN:
self.gate.green.setStart(x, y)
self.drawing = 'g'
elif event == cv2.EVENT_LBUTTONUP:
self.gate.green.setEnd(x, y)
self.drawing = None
print self.gate.green
elif event == cv2.EVENT_RBUTTONDOWN:
self.gate.red.setStart(x, y)
self.drawing = 'r'
elif event == cv2.EVENT_RBUTTONUP:
self.gate.red.setEnd(x, y)
self.drawing = None
print self.gate.red
elif event == cv2.EVENT_MOUSEMOVE and self.drawing is not None:
if self.drawing == 'g':
self.gate.green.setEnd(x, y)
else:
self.gate.red.setEnd(x, y)
else:
return
toDraw = self.gate.background.copy()
self.gate.redraw(toDraw)
cv2.imshow("output", toDraw)
def initialize(self):
self.gate = CountingGate(self.greenLine, self.redLine)
def firstFrameCallback(self, caller, frame):
self.gate.setBackground(frame.copy())
self.gate.redraw(frame)
caller.legendLine = 2
cv2.setMouseCallback("output", self.mouseHandler)
def intersectPix(x, y):
delta = max(abs(numpy.array(bg[y][x], dtype=numpy.int16)
- numpy.array(frame[y][x], dtype=numpy.int16)))
print x, "x", y, ":", delta
def infoCallback(self, caller, stepNumber, step):
return "{0:05d} : {1:3.0f} {2:3.0f} / i={3} o={4}".format(
caller.frameNumber,
self.greenRate, self.redRate,
self.ingoing, self.outgoing)
def inputFrameCallback(self, caller, stepNumber, step):
"""
TODO
* enumerer les points des 2 lignes dans 2 listes
- diff entre 1ere frame et courante comme dans diffThreshold
- parcourir chaque point des lignes : en deduire des listes de segments (paires d'index)
- afficher les segments obtenus (en blanc) + marquer les "taches"
- les historiser + comparer l'historique des 2 lignes
comment reperer les croisements :
- en mode horizontal (vue dessus) ? proximite des centres ?
- en mode vertical (vue de cote) ? compter combien de taches il y a entre les lignes en
partant du principe qu'il y en a 0 au depart ?
a creuser sur des exemples ...
"""
self.greenRate, self.redRate = self.gate.intersect(step['input'], self.colorThreshold)
newState = (
("G" if self.greenRate > self.lineThreshold else "_") +
("R" if self.redRate > self.lineThreshold else "_") )
if self.lineState != newState:
testCase = self.lineState + "," + self.dirState + "," + newState
if self.stateMachine.has_key(testCase):
(self.dirState, action) = self.stateMachine[testCase]
if action == 1:
self.ingoing += 1
elif action == -1:
self.outgoing += 1
else:
print "Unknown state", testCase
self.lineState = newState
self.gate.redraw(step['output'])
def initialize(self):
self.gate = CountingGate(self.greenLine, self.redLine)
