Python GeomUtils.strokeLength方法代码示例

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
    def onStrokeAdded( self, stroke ):
        #If it's a closed figure, it is its own wall
        rtm_logger.debug("Stroke Added")
        newWallDict = {'closed': False, 'matches': {}}
        ep1 = stroke.Points[0]
        ep2 = stroke.Points[-1]
        strokeLen = GeomUtils.strokeLength(stroke)

        addToWalls = True
        if GeomUtils.pointDistanceSquared(ep1.X, ep1.Y, ep2.X, ep2.Y) < (strokeLen  * 0.05) ** 2:
            rtm_logger.debug("Closed stroke")
            newWallDict['closed'] = True

        rtm_logger.debug("Adding stroke as possible future wall")
        self.wallInfo[stroke] = newWallDict
        #self.linkStrokesTogether()

        for testStroke, wallDict in self.wallInfo.items():
            gran = min(len(stroke.Points), len(testStroke.Points))
            if wallDict['closed'] and GeomUtils.strokeContainsStroke(testStroke, stroke, granularity = gran):
                outStk = testStroke
                inStk = stroke
            elif newWallDict['closed'] and GeomUtils.strokeContainsStroke(stroke, testStroke, granularity = gran):
                outStk = stroke
                inStk = testStroke
            else:
                continue

            rtm_logger.debug("Found containment with another stroke")
            rtAnno = RaceTrackAnnotation(rightwalls = [outStk], leftwalls = [inStk]) 
            BoardSingleton().AnnotateStrokes([stroke, testStroke], rtAnno)
            del(self.wallInfo[testStroke])
            addToWalls = False
            break

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
    def _matchHeadtoTail(self, head = None, tail = None, point = None):
        """Input head stroke or tail stroke. If head is specified, match it to a tail. If tail is specified, match it to a head.
           Parameter 'point' should be the tip if head is specified, the end-point if tail is specified.
           Returns a list of tuples: (tip, head_stroke) if tail is specified, (endpoint, tail_stroke) if head is specified."""
        retlist = []
        if point is None:
            return retlist

            
        if head is not None and tail is None: #Head is specified, find the tail
            tip = point
            ep1, ep2 = head.Points[0], head.Points[-1]
            headBreadth = GeomUtils.pointDistance(ep1.X, ep1.Y, ep2.X, ep2.Y)
            for endpoint, tailStroke in self._endpoints:
                if GeomUtils.strokeLength(head) < GeomUtils.strokeLength(tailStroke) \
                and _isPointWithHead(endpoint, head, tip): #Make sure the proportions aren't totally off
                    logger.debug("Head stroke has a tail close and within cone")
                    pointingLength = len(tailStroke.Points) / 5
                    #headToTail
                    if endpoint == tailStroke.Points[0]:
                        linept1, linept2 = tailStroke.Points[pointingLength], endpoint
                    elif endpoint== tailStroke.Points[-1]:
                        linept1, linept2 = tailStroke.Points[-pointingLength], endpoint
                    pointsTo = GeomUtils.linePointsTowards(linept1, linept2, tip, headBreadth)
                    if pointsTo:
                        retlist.append( (endpoint, tailStroke) )

        elif tail is not None and head is None: #Find the head
            endpoint = point
            pointingLength = len(tail.Points) / 5
            #headToTail
            if endpoint == tail.Points[0]:
                linept1, linept2 = tail.Points[pointingLength], endpoint
            elif endpoint== tail.Points[-1]:
                linept1, linept2 = tail.Points[-pointingLength], endpoint

            for tip, headStroke in self._arrowHeads:
                ep1, ep2 = headStroke.Points[0], headStroke.Points[-1]
                headBreadth = GeomUtils.pointDistance(ep1.X, ep1.Y, ep2.X, ep2.Y)
                if GeomUtils.strokeLength(headStroke) < GeomUtils.strokeLength(tail) \
                and _isPointWithHead(endpoint, headStroke, tip):
                    logger.debug("Tail stroke is close and within cone of an arrowhead")
                    pointsTo = GeomUtils.linePointsTowards(linept1, linept2, tip, headBreadth)
                    if pointsTo:
                        retlist.append( (tip, headStroke) )
        return retlist

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
    def onStrokeAdded(self, stroke):
        "Tags 1's and 0's as letters (TextAnnotation)"
        closedDistRatio = 0.22
        circularityThresh_0 = 0.80
        circularityThresh_1 = 0.20
        strokeLen = max(GeomUtils.strokeLength(stroke), 1)
        normDist = max(3, strokeLen / 5)
        head, tail = stroke.Points[0], stroke.Points[-1]

        endDist = GeomUtils.pointDistance(head.X, head.Y, tail.X, tail.Y)
        #If the endpoints are 1/thresh apart, actually close the thing
        isClosedShape = GeomUtils.pointDistanceSquared(head.X, head.Y, tail.X, tail.Y) \
                        < (strokeLen * closedDistRatio) ** 2

        if isClosedShape: #Close the shape back up
            s_norm = GeomUtils.strokeNormalizeSpacing( Stroke(stroke.Points + [stroke.Points[0]]) , normDist ) 
        else:
            s_norm = GeomUtils.strokeNormalizeSpacing( stroke , normDist ) 
        curvatures = GeomUtils.strokeGetPointsCurvature(s_norm)
        circularity = GeomUtils.strokeCircularity( s_norm ) 

        if isClosedShape and circularity > circularityThresh_0:
            height = stroke.BoundTopLeft.Y - stroke.BoundBottomRight.Y
            oAnnotation = TextAnnotation("0", height)
            l_logger.debug("Annotating %s with %s" % ( stroke, oAnnotation))
            BoardSingleton().AnnotateStrokes( [stroke],  oAnnotation)
            l_logger.debug(" Afterward: %s.annotations is %s" % ( stroke, stroke.Annotations))

        elif len(stroke.Points) >= 2 \
            and max(curvatures) < 0.5 \
            and circularity < circularityThresh_1:
                if stroke.Points[0].X < stroke.Points[-1].X + strokeLen / 2.0 \
                and stroke.Points[0].X > stroke.Points[-1].X - strokeLen / 2.0:
                    height = stroke.BoundTopLeft.Y - stroke.BoundBottomRight.Y
                    oneAnnotation = TextAnnotation("1", height)
                    l_logger.debug("Annotating %s with %s" % ( stroke, oneAnnotation.text))
                    BoardSingleton().AnnotateStrokes( [stroke],  oneAnnotation)
                    l_logger.debug(" Afterward: %s.annotations is %s" % ( stroke, stroke.Annotations))
                elif stroke.Points[0].Y < stroke.Points[-1].Y + strokeLen / 2.0 \
                and stroke.Points[0].Y > stroke.Points[-1].Y - strokeLen / 2.0:
                    width = stroke.BoundBottomRight.X - stroke.BoundTopLeft.X 
                    dashAnnotation = TextAnnotation("-", width * 1.5) #Treat the dash's (boosted) width as its scale 
                    l_logger.debug("Annotating %s with %s" % ( stroke, dashAnnotation.text))
                    BoardSingleton().AnnotateStrokes( [stroke],  dashAnnotation)
        else:
            if not isClosedShape:
                l_logger.debug("0: Not a closed shape")
            if not (circularity > circularityThresh_0):
                l_logger.debug("0: Not circular enough: %s" % (circularity))
            if not len(stroke.Points) >= 2:
                l_logger.debug("1: Not enough points")
            if not (circularity < circularityThresh_1):
                l_logger.debug("1: Too circular")
            if not (max(curvatures) < 0.5):
                l_logger.debug("1: Max curvature too big %s" % max(curvatures))
            if not ( stroke.Points[0].X < stroke.Points[-1].X + strokeLen / 3 \
               and   stroke.Points[0].X > stroke.Points[-1].X - strokeLen / 3):
                l_logger.debug("1: Not vertical enough: \nX1 %s, \nX2 %s, \nLen %s" % (stroke.Points[0].X, stroke.Points[-1].X, strokeLen))

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
    def onAnnotationAdded( self, strokes, annotation ):
        "Checks to see if an equals sign has been added"
        
        # Find the midpoints         
        ul,br = GeomUtils.strokelistBoundingBox( strokes )
        midpointY = (ul.Y + br.Y) / 2
        midpointX = (ul.X + br.X) / 2
        strokeLen = GeomUtils.strokeLength(strokes[0])

        for a in self.possibleAnnotations:
            s = a.Strokes[0]
            prevStrokeLen = GeomUtils.strokeLength(s)

            # test the the two segments are of similar length
            lengthRange = 0.4
            if prevStrokeLen * (1-lengthRange) < strokeLen < prevStrokeLen * (1+lengthRange):
                pass # were the right length
            else: # not the right length, so lets start again
                continue

            ul,br = GeomUtils.strokelistBoundingBox( [s] )
            prevMidpointY = (ul.Y + br.Y) / 2
            prevMidpointX = (ul.X + br.X) / 2

            # Test that the two segments are close enough horizontally
            if GeomUtils.pointDistance(midpointX, 0, prevMidpointX, 0) < prevStrokeLen * 0.4:
                pass # there are close enough horizontally
            else: # we start again
                continue

            # Test that the two segments are close enough vertically
            if GeomUtils.pointDistance(0,midpointY, 0, prevMidpointY) < prevStrokeLen * 0.5:
                pass # there are close enough vertically
            else: # we start again
                continue

            # we found a match
            self.possibleAnnotations.remove(a)
            self.getBoard().AnnotateStrokes( strokes + [s],  EqualsAnnotation(1))
            return


        # no match was found, add to the list of possible
        self.possibleAnnotations.append(annotation)
        return

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
    def onStrokeAdded( self, stroke ):
        "Watches for Strokes with Circularity > threshold to Annotate"
        # need at least 6 points to be a circle
	if GeomUtils.strokeLength(stroke) < 6:
            logger.debug("Too small, not a circle (size %s)" %  GeomUtils.strokeLength(stroke) )
            return
	s_norm = GeomUtils.strokeNormalizeSpacing( stroke, 20 ) 
	s_chop = GeomUtils.strokeChopEnds( s_norm, 0.20 ) 
        circ_norm = GeomUtils.strokeCircularity( s_norm ) 
        circ_chop = GeomUtils.strokeCircularity( s_chop ) 

        #logger.debug( "stroke: %s"% ([str(p) for p in s_norm.Points] ) )
        #logger.debug( "potential circles (%f,%f) <> %f"% (circ_norm, circ_chop, self.threshold ) )

        if( circ_norm>self.threshold or circ_chop>self.threshold):
            cen = stroke.Center
            avgDist = GeomUtils.averageDistance( cen, stroke.Points )
            logger.debug("Circle found")
            anno = CircleAnnotation( circ_norm, cen, avgDist )
            BoardSingleton().AnnotateStrokes( [stroke],  anno)

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
    def onStrokeAdded( self, stroke ):
        "Watches for Strokes with Circularity > threshold to Annotate"
        # need at least 6 points to be a circle
	if stroke.length()<6:
            return
        strokeLen = GeomUtils.strokeLength(stroke)
        distCutoff = NodeMarker.CLOSED_DIST_THRESH * (strokeLen ** 2)
	#s_norm = GeomUtils.strokeNormalizeSpacing( stroke, 20 ) 
        ep1 = stroke.Points[0]
        ep2 = stroke.Points[-1]

        epDist = GeomUtils.pointDistanceSquared(ep1.X, ep1.Y, ep2.X, ep2.Y)
        if epDist <= distCutoff:
            avgDist = GeomUtils.averageDistance( stroke.Center, stroke.Points )
            self.getBoard().AnnotateStrokes([stroke], DiGraphNodeAnnotation(0, stroke.Center, avgDist))
        else:
            node_log.debug("Not a node: endpoint distance %s > %s" % (epDist, distCutoff))

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
def _isArrowHead(stroke, matcher):
    
    numPts = 11
    sNorm = GeomUtils.strokeNormalizeSpacing(stroke, numpoints = numPts)
    curvatures = GeomUtils.strokeGetPointsCurvature(sNorm)
    maxCurv = max(curvatures)
    maxCurvIdx = curvatures.index(maxCurv)
    #Make sure the max curvature is roughly in the middle of the stroke before even bothering
    #   with more complicated checks
    if maxCurvIdx > (numPts / 5.0) and maxCurvIdx < ( 4 * numPts / 5.0): 
        strkLen = GeomUtils.strokeLength(stroke)
        arrowHeadStroke = GeomUtils.strokeNormalizeSpacing(Stroke([sNorm.Points[0], sNorm.Points[maxCurvIdx], sNorm.Points[-1]]), numpoints = strkLen) #What would the approximated arrowhead look like?
        origStroke = GeomUtils.strokeNormalizeSpacing(stroke, numpoints = strkLen)
        approxAcc = GeomUtils.strokeDTWDist(sNorm, arrowHeadStroke)
        #logger.debug("Stroke approximates arrowhead with %s accuracy" % (approxAcc))

        return approxAcc < 500000
        #_isArrowHead_Template(stroke, matcher) or _isArrowHead_Template(Stroke(list(reversed(stroke.Points))), matcher)
    
    return False

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
    def tagBox(self, stroke):

        endPointDistPct = 0.10 #How close (as % of length) the points have to be to each other
        boxApproxThresh = 50000 #The DTW distance between the stroke and how it best fits a box
        stkLen = GeomUtils.strokeLength(stroke)
        ep1, ep2 = stroke.Points[0], stroke.Points[-1]
        epDistSqr = GeomUtils.pointDistanceSquared(ep1.X, ep1.Y, ep2.X, ep2.Y)
        if  epDistSqr > (endPointDistPct * stkLen) ** 2:
            print "Endpoints aren't close enough to be a box"
            return
        overshoot = max(1, len(stroke.Points)/10)
        norm_stroke = GeomUtils.strokeSmooth(GeomUtils.strokeNormalizeSpacing(Stroke(stroke.Points + stroke.Points[0:overshoot]), numpoints = 70))
        #D.strokeCurvatureHistogram(norm_stroke)
        curvatures = GeomUtils.strokeGetPointsCurvature(norm_stroke)
        corners = set([])
        curvatures_cpy = list(curvatures)
        while len(corners) < 4:
            crnr_idx = curvatures_cpy.index(max(curvatures_cpy))
            crnr = curvatures_cpy[crnr_idx] * 57.295
            for nBor in range(crnr_idx -2, crnr_idx + 3):
                if nBor < len(curvatures_cpy) and nBor > 0:
                    curvatures_cpy[nBor] = 0
            if crnr > 0: #30 and crnr < 150:
                #Have a curvature, and we haven't already classified its immed neighbors as a corner
                corners.add(crnr_idx)
            else:
                break
        if len(corners) != 4:
            return
        else:
            c_list = [norm_stroke.Points[c_idx] for c_idx in sorted(list(corners))]
            cornerStroke = Stroke(c_list + c_list[:2])
            boxStroke = GeomUtils.strokeNormalizeSpacing(Stroke(c_list + [c_list[0]]))
            origStroke = GeomUtils.strokeNormalizeSpacing(Stroke(stroke.Points + [stroke.Points[0]]))
            approxAcc = GeomUtils.strokeDTWDist(boxStroke, origStroke)
            print "Box approximates original with %s accuracy" % (approxAcc)
            if approxAcc < boxApproxThresh:
                self.getBoard().AnnotateStrokes([stroke], BoxAnnotation(c_list))

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
    def _matchHeadtoTail(self, head = None, tail = None, point = None):
        """Input head stroke or tail stroke. If head is specified, match it to a tail. If tail is specified, match it to a head.
           Parameter 'point' should be the tip if head is specified, the end-point if tail is specified.
           Returns a list of tuples: (tip, head_stroke) if tail is specified, (endpoint, tail_stroke) if head is specified."""
        retlist = []
        if point is None:
            return retlist

            
        headStroke = head
        tailStroke = tail

        if headStroke is not None and tail is None: #Head is specified, find the tail
            tip = point
            ep1, ep2 = headStroke.Points[0], headStroke.Points[-1]
            headBreadth = GeomUtils.pointDistance(ep1.X, ep1.Y, ep2.X, ep2.Y)
            for endpoint, origStk, tailStroke in self._endpoints:
                pointingLength = len(tailStroke.Points) / 10
                if endpoint == tailStroke.Points[0]: #Treat as drawn head2tail
                    tailpoints = tailStroke.Points
                    linept1, linept2 = tailStroke.Points[pointingLength], endpoint
                elif endpoint== tailStroke.Points[-1]: #Treat as drawn tail2head
                    tailpoints = list(reversed(tailStroke.Points))
                    linept1, linept2 = tailStroke.Points[-(pointingLength+1)], endpoint

                headLen = GeomUtils.strokeLength(headStroke) 
                tailLen = GeomUtils.strokeLength(tailStroke)
                pointWithHead = _isPointWithHead(tailpoints, headStroke, tip)
                if headLen < tailLen * 2 \
                and pointWithHead:
                    logger.debug("Head stroke has a tail close and within cone")
                    #headToTail
                    pointsTo = GeomUtils.linePointsTowards(linept1, linept2, tip, headBreadth)
                    if pointsTo:
                        logger.debug("  Tail points to head")
                        retlist.append( (endpoint, origStk) )
                    else:
                        logger.debug("  Tail does NOT point to head")
                else:
                    if headLen < tailLen * 2:
                        logger.debug("  Head stroke scale is okay for this arrowhead")
                    else:
                        logger.debug("  Head stroke scale is BAD for this arrowhead")
                        logger.debug("  Head Len: %s, tail Len: %s" % (headLen, tailLen))
                    if not pointWithHead:
                        logger.debug("  Head stroke is NOT close or within cone of an arrowhead\n")
                    else:
                        logger.debug("  Head stroke is close and within cone of an arrowhead\n")

        elif tailStroke is not None and headStroke is None: #Find the head
            endpoint = point
            pointingLength = len(tailStroke.Points) / 10

            if endpoint == tailStroke.Points[0]: #Treat as drawn head2tail
                tailpoints = tailStroke.Points
                linept1, linept2 = tailStroke.Points[pointingLength], endpoint
            elif endpoint== tailStroke.Points[-1]: #Treat as drawn tail2head
                tailpoints = list(reversed(tailStroke.Points))
                linept1, linept2 = tailStroke.Points[-pointingLength], endpoint

            for tip, origStk, headStroke in self._arrowHeads:
                ep1, ep2 = headStroke.Points[0], headStroke.Points[-1]
                headBreadth = GeomUtils.pointDistance(ep1.X, ep1.Y, ep2.X, ep2.Y)
                headLen = GeomUtils.strokeLength(headStroke) 
                tailLen = GeomUtils.strokeLength(tailStroke)
                pointWithHead = _isPointWithHead(tailpoints, headStroke, tip)
                if headLen < tailLen * 2\
                and pointWithHead:
                    logger.debug("Tail stroke is close and within cone of an arrowhead")
                    pointsTo = GeomUtils.linePointsTowards(linept1, linept2, tip, headBreadth)
                    if pointsTo:
                        logger.debug("  Tail points to head")
                        retlist.append( (tip, origStk) )
                    else:
                        logger.debug("  Tail does NOT point to head")
                else:
                    if headLen < tailLen * 2:
                        logger.debug("  Tail stroke scale is okay for this arrowhead")
                    else:
                        logger.debug("  Tail stroke scale is BAD for this arrowhead")
                        logger.debug("  Head Len: %s, tail Len: %s" % (headLen, tailLen))

                    if not pointWithHead:
                        logger.debug("  Tail stroke is NOT close or within cone of an arrowhead\n")
                    else:
                        logger.debug("  Tail stroke is close and within cone of an arrowhead\n")
                        
        return retlist

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
    def onStrokeAdded( self, stroke ):
        "Watches for Strokes that look like an arrow to Annotate"
        smoothedStroke = GeomUtils.strokeSmooth(stroke)
        ep1 = stroke.Points[0]
        ep2 = stroke.Points[-1]
        #ep1 = smoothedStroke.Points[0]
        #ep2 = smoothedStroke.Points[-1]
        isArrowHead = False
        #GeomUtils.ellipseAxisRatio(stroke)


        #Match single-stroke arrows
        #DISABLED
        logger.debug("**Warning: Single-stroke arrows disabled**")
        tip, tail = None, None
        tip, tail = _isSingleStrokeArrow(smoothedStroke)
        #if tip is None or tail is None:
            #revpts = list(smoothedStroke.Points)
            #revpts.reverse()
            #tip, tail = _isSingleStrokeArrow(Stroke(revpts))
        
        if  tip is not None and tail is not None:
            isArrowHead = False
            anno = ArrowAnnotation( tip, tail, headstroke= stroke, tailstroke = stroke )
            self.getBoard().AnnotateStrokes( [stroke],  anno)
        #/DISABLED
        else:
            if _isArrowHead(smoothedStroke, self.arrowHeadMatcher):
                logger.debug(" ARROWHEAD")
                #head = smoothedStroke
                head = stroke
                isArrowHead = True

                #                * (tip-point)
                #              o   o
                #             o      o
                #            o         o
                #          o            o
                
                #Get the endpoints/tip point as max curvature
                strokeNorm = GeomUtils.strokeNormalizeSpacing(smoothedStroke, numpoints = 7)
                curvatures = GeomUtils.strokeGetPointsCurvature(strokeNorm)
                ptIdx = curvatures.index(max(curvatures))
                tip = strokeNorm.Points[ptIdx] #Middle is the point of max curvature

                #Match it to any tails we have 
                matchedTails = self._matchHeadtoTail(head = stroke, point = tip)
                for headpoint, tail in matchedTails:
                    #Orient the tail correctly
                    if tail.Points[0] == headpoint:
                        endpoint = tail.Points[-1]
                        direction = 'head2tail'
                    elif tail.Points[-1] == headpoint:
                        endpoint = tail.Points[0]
                        direction = 'tail2head'

                    logger.debug("Stroke is head of arrow, drawn %s" % (direction))
                    anno = ArrowAnnotation(tip, endpoint, headstroke = stroke, tailstroke = tail, direction = direction)
                    self.getBoard().AnnotateStrokes([head, tail],anno)
        
        #Match it like a tail even if we think it's an arrowhead. Oh ambiguity!
        matchedHeads = self._matchHeadtoTail(tail = stroke, point = ep1)
        tail = stroke
        for tip, head in matchedHeads:
            logger.debug("Stroke is tail of arrow, drawn head2tail")
            anno = ArrowAnnotation(tip, ep2, headstroke = head, tailstroke = tail, direction='head2tail') #Arrow is from the back endpoint to the tip of the arrowhead
            self.getBoard().AnnotateStrokes([head, tail],anno)
            
        matchedHeads = self._matchHeadtoTail(tail = stroke, point = ep2)
        for tip, head in matchedHeads:
            logger.debug("Stroke is tail of arrow, drawn tail2head")
            anno = ArrowAnnotation(tip, ep1, headstroke = head, tailstroke =tail, direction='tail2head')
            self.getBoard().AnnotateStrokes([head, tail],anno)
        
        #Add this stroke to the pool for future evaluation
        sNorm = GeomUtils.strokeNormalizeSpacing(stroke, numpoints = max(GeomUtils.strokeLength(stroke) / 3, 1))
        self._endpoints.append( (ep1, stroke, sNorm) )
        self._endpoints.append( (ep2, stroke, sNorm) )
        if isArrowHead:
            self._arrowHeads.append( (tip, stroke, sNorm) )

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
    def onAnnotationAdded( self, strokes, annotation ):
        "Checks to see if an multiply sign has been added"

        # Find the midpoints         
        ul,br = GeomUtils.strokelistBoundingBox( strokes )
        midpointY = (ul.Y + br.Y) / 2
        midpointX = (ul.X + br.X) / 2
        strokeLen = GeomUtils.strokeLength(strokes[0])

        if annotation.isType(DirectedLine.BT_LineAnnotation):
            possibleAnnotations = self.possibleAnnotations_TB
            otherPossibleAnnotations = self.possibleAnnotations_BT
        elif annotation.isType(DirectedLine.TB_LineAnnotation):
            possibleAnnotations = self.possibleAnnotations_BT
            otherPossibleAnnotations = self.possibleAnnotations_TB

        print len(possibleAnnotations)

        for a in possibleAnnotations:
            s = a.Strokes[0]
            prevStrokeLen = GeomUtils.strokeLength(s)

            # test the the two segments are of similar length
            lengthRange = 0.4
            if prevStrokeLen * (1-lengthRange) < strokeLen < prevStrokeLen * (1+lengthRange):
                pass # were the right length
            else: # not the right length, so lets start again
                continue

            ul,br = GeomUtils.strokelistBoundingBox( [s] )
            prevMidpointY = (ul.Y + br.Y) / 2
            prevMidpointX = (ul.X + br.X) / 2

            # Test that the two segments are close enough horizontally
            if GeomUtils.pointDistance(midpointX, 0, prevMidpointX, 0) < prevStrokeLen * 0.25:
                pass # there are close enough horizontally
            else: # we start again
                continue

            # Test that the two segments are close enough vertically
            if GeomUtils.pointDistance(0,midpointY, 0, prevMidpointY) < prevStrokeLen * 0.25:
                pass # there are close enough vertically
            else: # we start again
                continue

            # we found a match
            possibleAnnotations.remove(a)

            annos = s.findAnnotations()

            annos += self.getBoard().FindAnnotations(strokelist = strokes)

            for i in annos:
                self.getBoard().RemoveAnnotation(i)

            ul,br = GeomUtils.strokelistBoundingBox( strokes + [s] )
            height = ul.Y - br.Y
            self.getBoard().AnnotateStrokes( strokes + [s],  MultAnnotation(height))
            return


        # no match was found, add to the list of possible
        otherPossibleAnnotations.append(annotation)
        return

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
def traceStroke(stroke):
    """Take in a true stroke with timing data, bitmap it and
    then trace the data for it"""
    #logger.debug("Stripping Timing Information from Stroke")
    #logger.debug("Stroke in, %s points" % len(stroke.Points))
    strokeLen = GeomUtils.strokeLength(stroke)
    sNorm = GeomUtils.strokeNormalizeSpacing(stroke, int(len(stroke.Points) * 1.5)) #Normalize to ten pixel spacing
    graph = {}
    #Graph structure looks like 
    #   { <point (x, y)> : {'kids' : <set of Points>, 'thickness' : <number>} }
    #Find self intersections
    intersections = {}
    for i in range(len(sNorm.Points) - 1):
        seg1 = (sNorm.Points[i], sNorm.Points[i+1])
        for j in range(i+1, len(sNorm.Points) - 1 ):
            seg2 = (sNorm.Points[j], sNorm.Points[j+1])
            cross = GeomUtils.getLinesIntersection( seg1, seg2)
            #Create a new node at the intersection
            if cross != None \
                and cross != seg1[0] \
                and cross != seg2[0]:
                    crossPt = (cross.X, cross.Y)
                    intDict = intersections.setdefault(crossPt, {'kids' : set(), 'thickness' : 1})
                    for pt in seg1 + seg2: #Add the segment endpoints as kids
                        coords = (int(pt.X), int(pt.Y))
                        if coords != crossPt:
                            intDict['kids'].add(coords)
            
    prevPt = None
    #for i in range(1, len(sNorm.Points)):
    for pt in sNorm.Points:
        curPt = (int(pt.X), int(pt.Y))
        if prevPt != None:
            #prevPt = (pt.X, pt.Y)
            graph[curPt] = {'kids' : set([prevPt]), 'thickness':1}
            graph[prevPt]['kids'].add(curPt)
        else:
            graph[curPt] = {'kids' : set(), 'thickness' :1 }
        prevPt = curPt
    for pt, ptDict in intersections.items():
        for k in graph.get(pt, {'kids' : []})['kids']:
            ptDict['kids'].add(k)
            graph[k]['kids'].add(pt)
        for k in ptDict['kids']:
            graph[k]['kids'].add(pt)
        graph[pt] = ptDict
    strokeList = ImageStrokeConverter.graphToStrokes(graph)
    if len(strokeList) > 1:
        #logger.debug("Stroke tracing split into multiple strokes")
        strokeList.sort(key=(lambda s: -len(s.points)))

    retPts = []
    
    if len(strokeList) > 0:
        for pt in strokeList[0].points:
            #logger.debug("Adding point %s" % (str(pt)))
            retPts.append(Point(pt[0], pt[1]))

    #logger.debug("Stroke out, %s points" % len(retPts))
    retStroke = Stroke(retPts)
    #saver = StrokeStorage.StrokeStorage()
    #saver.saveStrokes([stroke, retStroke])
    return retStroke

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
def generateFeatureVector(stroke):
    finalVector = {}
    finalVector['len'] = GeomUtils.strokeLength(stroke)
    sNorm = GeomUtils.strokeNormalizeSpacing( stroke, max(finalVector['len'] / 4.0, 1) )
    finalVector['orientations'] = GeomUtils.pointListOrientationHistogram(sNorm.Points)
    return finalVector

# 需要导入模块: from Utils import GeomUtils [as 别名]
# 或者: from Utils.GeomUtils import strokeLength [as 别名]
def _scoreStrokesForLetter(strokelist, letter):
    """Get the confidence score for a group of strokes matching a letter, normalized [0.0-1.0]"""
    retConfidence = 0.0
    #Recognition thresholds
    closedDistRatio = 0.22
    circularityThresh_0 = 0.80
    circularityThresh_1 = 0.20
    maxStraightCurvature = 0.6
    strokesBB = GeomUtils.strokelistBoundingBox(strokelist)

    if len(strokelist) == 0:
        return 0.0

    #The case of a single point
    if strokesBB[0].X == strokesBB[1].X and strokesBB[0].Y == strokesBB[1].Y:
        return 0.0

    #Recognize a zero
    if letter.upper() == "0":
        stroke = strokelist[0]
        strokeLen = max(GeomUtils.strokeLength(stroke), 1)
        normDist = max(3, strokeLen / 5) #granularity of point spacing -- at least 3
        head, tail = stroke.Points[0], stroke.Points[-1]

        endDist = GeomUtils.pointDistance(head.X, head.Y, tail.X, tail.Y)
        #If the endpoints are 1/thresh apart, actually close the thing
        isClosedShape = GeomUtils.pointDistanceSquared(head.X, head.Y, tail.X, tail.Y) \
                        < ( (strokeLen * closedDistRatio) ** 2 )

        if isClosedShape: #Close the shape back up
            s_norm = GeomUtils.strokeNormalizeSpacing( Stroke(stroke.Points + [stroke.Points[0]]) , normDist ) 
        else:
            s_norm = GeomUtils.strokeNormalizeSpacing( stroke , normDist ) 
        #curvatures = GeomUtils.strokeGetPointsCurvature(s_norm)
        circularity = GeomUtils.strokeCircularity( s_norm ) 

        if isClosedShape:
            retConfidence += 0.5
        if circularity > circularityThresh_0:
            retConfidence += 0.5
        return retConfidence
    #Recognize a one
    elif letter.upper() == "1":
        stroke = strokelist[0]
        strokeLen = max(GeomUtils.strokeLength(stroke), 1)
        normDist = max(3, strokeLen / 5) #granularity of point spacing -- at least 3
        s_norm = GeomUtils.strokeNormalizeSpacing( stroke , normDist ) 

        circularity = GeomUtils.strokeCircularity( s_norm ) 
        curvatures = GeomUtils.strokeGetPointsCurvature(s_norm)
        if max(curvatures) < maxStraightCurvature:
            retConfidence += 0.30
        if circularity < circularityThresh_1:
            retConfidence += 0.5
            if stroke.Points[0].X < stroke.Points[-1].X + strokeLen / 2.0 \
            and stroke.Points[0].X > stroke.Points[-1].X - strokeLen / 2.0:
                retConfidence += 0.2
        return retConfidence
    #Recognize a dash
    elif letter.upper() == "-":
        stroke = strokelist[0]
        strokeLen = max(GeomUtils.strokeLength(stroke), 1)
        normDist = max(3, strokeLen / 5) #granularity of point spacing -- at least 3
        s_norm = GeomUtils.strokeNormalizeSpacing( stroke , normDist ) 

        circularity = GeomUtils.strokeCircularity( s_norm ) 
        curvatures = GeomUtils.strokeGetPointsCurvature(s_norm)
        if max(curvatures) < maxStraightCurvature:
            retConfidence += 0.30
        if circularity < circularityThresh_1:
            retConfidence += 0.5
            if stroke.Points[0].Y < stroke.Points[-1].Y + strokeLen / 2.0 \
            and stroke.Points[0].Y > stroke.Points[-1].Y - strokeLen / 2.0:
                retConfidence += 0.2
        return retConfidence
    else:
        return 0.0