1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
#-*- coding:utf-8 -*-
from PIL import Image
import Queue
import time
#只是玩玩就硬编码了..
ext = png
imageName = p.%s % ext
saveName = {0:05d}.{1}
#用PIL库载入图片
im = Image.open(imageName)
im = im.convert(RGB)
print im.format, im.size, im.mode
pix = im.load()
size = im.size
half = 256 >> 1
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
green = (0, 255, 0)
blue = (0, 0, 255)
yellow = (255, 255, 0)
fillColor = red
lineColor = yellow
colors = [red, green, blue, yellow, (0, 223, 248), (223, 8, 248), (255, 2, 146)]
cLen = len(colors)
#起点,终点
startPoint = [400, 984]
endPoint = [398, 25]
fa = [0] * size[0] * size[1]
def changeImage():
'''
将图片转换为二值图
'''
x, y = size
for i in xrange(x):
for j in xrange(y):
r, g, b = pix[i, j]
if r > half and g > half and b > half:
pix[i, j] = white
else:
pix[i, j] = black
#================================================================#
#BFS
def getNeighbor(point):
x, y = point
return [[x, y + 1], [x + 1, y], [x, y - 1], [x - 1, y]]
def inBounds(point, size):
x, y = point
sx, sy = size
if x < 0 or y < 0 or x >= sx or y >= sy:
return False
return True
def isWhite(point):
x, y = point
if pix[x, y] == white:
return True
return False
def bfs(start, end):
count = no = 0
q = [[start]]
while len(q):
path = q.pop(0);
p = path[-1]
if p[0] == end[0] and p[1] == end[1]:
im.save(saveName.format(no, ext))
no += 1
for pa in path:
pix[pa[0], pa[1]] = pix[pa[0], pa[1] - 1] = pix[pa[0], pa[1] - 2] = lineColor
count += 1
if not count % 200:
im.save(saveName.format(no, ext))
no += 1
no += 1
im.save(saveName.format(no, ext))
return path
for ne in getNeighbor(p):
if inBounds(ne, size) and isWhite(ne):
newPath = list(path)
newPath.append(ne)
q.append(newPath)
pix[ne[0], ne[1]] = fillColor
if not count % 10000:
im.save(saveName.format(no, ext))
no += 1
count += 1
return None
#================================================================#
#Astar
def getValue(point, end):
'''
启发函数
'''
return abs(point[0] - end[0]) + abs(point[1] - end[1])
def aStar(start, end):
fillColor = green
lineColor = black
count = no = 0
Q = Queue.PriorityQueue()
Q.put([0,[start]])
while(Q.qsize()):
q = Q.get()
path = q[-1]
p = path[-1]
if p[0] == end[0] and p[1] == end[1]:
im.save(saveName.format(no, ext))
no += 1
for pa in path:
pix[pa[0], pa[1]] = pix[pa[0], pa[1] - 1] = pix[pa[0], pa[1] - 2] = lineColor
count += 1
if not count % 200:
im.save(saveName.format(no, ext))
no += 1
im.save(saveName.format(no, ext))
return path
for ne in getNeighbor(p):
if inBounds(ne, size) and isWhite(ne):
newPath = list(path)
newPath.append(ne)
newList = [getValue(p, end) + len(newPath), newPath]
Q.put(newList)
pix[ne[0], ne[1]] = fillColor
if not count % 10000:
im.save(saveName.format(no, ext))
no += 1
count += 1
return None
#================================================================#
#并查集
def getID(x, y):
return x * size[0] + y
def ufInit(size):
for i in range(size[0]):
for j in range(size[1]):
fa[getID(i, j)] = getID(i, j)
def ufFind(v):
if v != fa[v]:
fa[v] = ufFind(fa[v])
return fa[v]
return fa[v]
def ufUnion(x, y):
x = ufFind(x)
y = ufFind(y)
if x == y: return
fa[x] = y
def connectivity():
fillColor = yellow
no = count = now = 0
d = {}
x_range = (5, 792)
y_range = (22, 986)
ufInit(size)
for x in range(x_range[0], x_range[1]):
for y in range(y_range[0], y_range[1]):
if pix[x, y] != black:
if pix[x - 1, y] == black and pix[x, y - 1] == black:
pass
elif pix[x - 1, y] == white and pix[x, y - 1] == black:
ufUnion(getID(x - 1, y), getID(x, y))
elif pix[x - 1, y] == black and pix[x, y - 1] == white:
ufUnion(getID(x, y - 1), getID(x, y))
else:
ufUnion(getID(x - 1, y), getID(x, y - 1))
ufUnion(getID(x, y), getID(x - 1, y))
for x in range(x_range[0], x_range[1]):
for y in range(y_range[0], y_range[1]):
count += 1
if pix[x, y] != black:
father = ufFind(getID(x,y))
if father not in d:
d[father] = colors[now % cLen]
now += 1
pix[x, y] = d[father]
if not count % 15000:
im.save(saveName.format(no, ext))
no += 1
im.save(saveName.format(no, ext))
#================================================================#
t1 = time.time()
changeImage()
#bfs(startPoint, endPoint)
#aStar(startPoint, endPoint)
connectivity()
t2 = time.time()
print t2- t1
|
