def hull_speed(xy,verbose=False):
"""
>>> xy = npy.asarray([[0,0],[0,1],[1,1],[1,0]])
>>> print hull_speed(xy)
(0.25, 0.35355339059327379, 0.0625, 0.35355339059327379)
"""
hull_xy = qhull(xy)
#max dist inside hull
d = pdist(hull_xy, 'euclidean')
dmax_idx = npy.argmax(d)
#total length
tot_length = npy.sum(npy.diag(squareform(d),1))
#hull_surf
p3 = npy.mean(hull_xy,axis=0)
n_hull = hull_xy.shape[0]
hull_surf = 0.0
for k in range(n_hull):
p1 = hull_xy[k,:]
p2 = hull_xy[(k+1)%n_hull,:]
a = area_of_triangle(p1,p2,p3)
hull_surf += a
if verbose:
import matplotlib.pyplot as plt
fig = plt.figure()
ax = fig.add_subplot(111, aspect='equal')
plt.scatter(xy[:,0],xy[:,1])
plt.plot(hull_xy[:,0],hull_xy[:,1])
plt.show()
return (hull_surf/xy.shape[0],d[dmax_idx]/xy.shape[0],hull_surf/tot_length**2,d[dmax_idx]/tot_length)
def draw(self,screen):
#Raw camera feed
capture_img = self.diffp.get_curr_capture()
if self.settings.points_enable:
draw=ImageDraw.Draw(capture_img)
for point in (point for point in self.settings.points.data if None is not point):
draw.ellipse((point[0]-2,point[1]-2)+(point[0]+2,point[1]+2),outline='red',fill=True)
capture = pygame.image.fromstring(capture_img.tostring(),capture_img.size,'RGB')
capture = capture.convert()
self.raw_cam_surface.blit(capture,(0,0))
#Modified feed
capture_img = self.diffp.get_curr_capture()
if self.settings.brightness_enable:
capture_img=ImageEnhance.Brightness(capture_img).enhance(self.settings.brightness)
if self.settings.contrast_enable:
capture_img=ImageEnhance.Contrast(capture_img).enhance(self.settings.contrast)
if self.settings.threshold_enable:
capture_img=capture_img.convert('I').convert('RGB')
capture_img=capture_img.point(lambda x: [255,0][x<=self.settings.threshold])
if self.settings.points_enable:
if 4==len([point for point in self.settings.points.data if None is not point]):
points=list(self.settings.points.data)
points.sort()
capture_img=capture_img.transform(capture_img.size,Image.QUAD,self.get_points(points))
# capture_img=capture_img.filter(ImageFilter.BLUR)
# capture_img=capture_img.filter(ImageFilter.CONTOUR)
# capture_img=capture_img.filter(ImageFilter.DETAIL)
# capture_img=capture_img.filter(ImageFilter.EDGE_ENHANCE)
# capture_img=capture_img.filter(ImageFilter.EDGE_ENHANCE_MORE)
# capture_img=capture_img.filter(ImageFilter.EMBOSS)
capture_img=capture_img.filter(ImageFilter.FIND_EDGES)
capture_img=capture_img.filter(ImageFilter.SMOOTH)
# capture_img=capture_img.filter(ImageFilter.SMOOTH_MORE)
# capture_img=capture_img.filter(ImageFilter.SHARPEN)
# capture_img=capture_img.convert('L').convert('RGB')
self.capture_img = capture_img
data=list(capture_img.convert('L').getdata())
width=self.diffp.get_capture_size()[0]
height=self.diffp.get_capture_size()[1]
#capture_img.convert('L').save('test.png')
# print (data[0],data[1],data[2],data[width],data[width+1],data[width+2])
points=[[col,row] for row in xrange(1,height-1) for col in xrange(1,width-1) if 255==data[col+width*row]]
from quickhull2d import qhull
from Numeric import array
# print array(points)
# print points
new_points=[tuple(i) for i in qhull(array(points)).tolist()]
# print new_points
# print new_points
#if len(new_points)>2:
#draw=ImageDraw.Draw(capture_img)
#draw.polygon(new_points,outline='red')
capture=pygame.image.fromstring(capture_img.tostring(),capture_img.size,'RGB')
capture=capture.convert()
self.mod_cam_surface.blit(capture,(0,0))
#Invalidate the ImageMaps that show the surfaces so they will get redrawn
self.raw_cam_window.child.invalidate(pygame.Rect(0,0,self.diffp.get_capture_size()[0],self.diffp.get_capture_size()[1]))
self.mod_cam_window.child.invalidate(pygame.Rect(0,0,self.diffp.get_capture_size()[0],self.diffp.get_capture_size()[1]))
self.renderer.update()