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graph_plgs.py
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graph_plgs.py
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from sciapp.action import Filter, Simple
from imagepy.ipyalg.graph import sknw
import numpy as np
from numpy.linalg import norm
import networkx as nx, wx
from numba import jit
import pandas as pd
from sciapp.object import mark2shp
def graph_mark(graph):
ids = graph.nodes()
pts = [graph.nodes[i]['o'] for i in ids]
pts = {'type':'points', 'body':[(i[1], i[0]) for i in pts]}
txt = [(a,b,str(c)) for (a,b),c in zip(pts['body'], ids)]
txt = {'type':'texts', 'body':txt}
return mark2shp({'type':'layer', 'body':[pts, txt]})
class BuildGraph(Filter):
title = 'Build Graph'
note = ['8-bit', 'not_slice', 'not_channel', 'auto_snap']
#process
def run(self, ips, snap, img, para = None):
ips.data = sknw.build_sknw(img, True)
sknw.draw_graph(img, ips.data)
ips.mark = graph_mark(ips.data)
class Statistic(Simple):
title = 'Graph Statistic'
note = ['all']
def load(self, ips):
if not isinstance(ips.data, nx.MultiGraph):
self.app.alert("Please build graph!");
return False;
return True;
def run(self, ips, imgs, para = None):
edges, nodes = [], []
ntitles = ['PartID', 'NodeID', 'Degree','X', 'Y']
etitles = ['PartID', 'StartID', 'EndID', 'Length']
k, unit = ips.unit
comid = 0
# for g in nx.connected_components(ips.data):
# for idx in g.nodes():
for g in [ips.data.subgraph(c).copy() for c in nx.connected_components(ips.data)]:
for idx in g.nodes():
o = g.nodes[idx]['o']
print(idx, g.degree(idx))
nodes.append([comid, idx, g.degree(idx), round(o[1]*k,2), round(o[0]*k,2)])
for (s, e) in g.edges():
eds = g[s][e]
for i in eds:
edges.append([comid, s, e, round(eds[i]['weight']*k, 2)])
comid += 1
self.app.show_table(pd.DataFrame(nodes, columns=ntitles), ips.title+'-nodes')
self.app.show_table(pd.DataFrame(edges, columns=etitles), ips.title+'-edges')
class Sumerise(Simple):
title = 'Graph Summarise'
note = ['all']
para = {'parts':False}
view = [(bool, 'parts', 'parts')]
def load(self, ips):
if not isinstance(ips.data, nx.MultiGraph):
self.app.alert("Please build graph!");
return False;
return True;
def run(self, ips, imgs, para = None):
titles = ['PartID', 'Noeds', 'Edges', 'TotalLength', 'Density', 'AveConnect']
k, unit = ips.unit
gs = [ips.data.subgraph(c).copy() for c in nx.connected_components(ips.data)] if para['parts'] else [ips.data]
comid, datas = 0, []
for g in gs:
sl = 0
for (s, e) in g.edges():
sl += sum([i['weight'] for i in g[s][e].values()])
datas.append([comid, g.number_of_nodes(), g.number_of_edges(), round(sl*k, 2),
round(nx.density(g), 2), round(nx.average_node_connectivity(g),2)][1-para['parts']:])
comid += 1
# print('======datas=========', datas)
# print('======columns=========', titles[1-para['parts']:])
self.app.show_table(pd.DataFrame(datas, columns=titles[1-para['parts']:]), ips.title+'-graph')
class CutBranch(Filter):
title = 'Cut Branch'
note = ['8-bit', 'not_slice', 'not_channel', 'auto_snap', 'preview']
para = {'lim':10, 'rec':False}
view = [(int, 'lim', (0,1e6), 0, 'limit', 'uint'),
(bool, 'rec', 'recursion')]
def load(self, ips):
if not isinstance(ips.data, nx.MultiGraph):
self.app.alert("Please build graph!");
return False;
self.buf = ips.data
return True;
def run(self, ips, snap, img, para = None):
g = ips.data = self.buf.copy()
k, unit = ips.unit
while True:
rm = []
for i in g.nodes():
if g.degree(i)!=1:continue
s,e = list(g.edges(i))[0]
if g[s][e][0]['weight']*k<=para['lim']:
rm.append(i)
g.remove_nodes_from(rm)
if not para['rec'] or len(rm)==0:break
img *= 0
sknw.draw_graph(img, g)
def cancel(self, ips):
if 'auto_snap' in self.note:
ips.swap()
ips.update()
ips.data = self.buf
class RemoveIsolate(Filter):
title = 'Remove Isolate Node'
note = ['all', 'not_slice', 'not_channel', 'auto_snap']
def load(self, ips):
if not isinstance(ips.data, nx.MultiGraph):
self.app.alert("Please build graph!");
return False;
return True;
def run(self, ips, snap, img, para = None):
g = ips.data
for n in list(g.nodes()):
if len(g[n])==0: g.remove_node(n)
img *= 0
sknw.draw_graph(img, g)
ips.mark = graph_mark(ips.data)
class Remove2Node(Simple):
title = 'Remove 2Path Node'
note = ['all']
def load(self, ips):
if not isinstance(ips.data, nx.MultiGraph):
self.app.alert("Please build graph!");
return False;
return True;
def run(self, ips, imgs, para = None):
g = ips.data
for n in list(g.nodes()):
if len(g[n])!=2 or n in g[n]: continue
(k1, e1), (k2, e2) = g[n].items()
if isinstance(g, nx.MultiGraph):
if len(e1)!=1 or len(e2)!=1: continue
e1, e2 = e1[0], e2[0]
l1, l2 = e1['pts'], e2['pts']
d1 = norm(l1[0]-g.nodes[n]['o']) > norm(l1[-1]-g.nodes[n]['o'])
d2 = norm(l2[0]-g.nodes[n]['o']) < norm(l2[-1]-g.nodes[n]['o'])
pts = np.vstack((l1[::[-1,1][d1]], l2[::[-1,1][d2]]))
l = np.linalg.norm(pts[1:]-pts[:-1], axis=1).sum()
g.remove_node(n)
g.add_edge(k1, k2, pts=pts, weight=l)
ips.img[:] = 0
sknw.draw_graph(ips.img, g)
ips.mark = graph_mark(ips.data)
@jit(nopython=True)
def floodfill(img, x, y):
buf = np.zeros((131072,2), dtype=np.uint16)
color = img[int(y), int(x)]
img[int(y), int(x)] = 0
buf[0,0] = x; buf[0,1] = y;
cur = 0; s = 1;
while True:
xy = buf[cur]
for dx in (-1,0,1):
for dy in (-1,0,1):
cx = xy[0]+dx; cy = xy[1]+dy
if cx<0 or cx>=img.shape[1]:continue
if cy<0 or cy>=img.shape[0]:continue
if img[cy, cx]!=color:continue
img[cy, cx] = 0
buf[s,0] = cx; buf[s,1] = cy
s+=1
if s==len(buf):
buf[:len(buf)-cur] = buf[cur:]
s -= cur; cur=0
cur += 1
if cur==s:break
class CutROI(Filter):
title = 'Cut By ROI'
note = ['8-bit', 'req_roi', 'not_slice', 'not_channel', 'auto_snap', 'preview']
def run(self, ips, snap, img, para = None):
msk = ips.mask(3) * (img>0)
r,c = np.where(msk)
for x,y in zip(c,r):
if img[y,x]>0:
floodfill(img, x, y)
class ShortestPath(Simple):
title = 'Graph Shortest Path'
note = ['all']
para = {'start':0, 'end':1}
view = [(int, 'start', (0,1e8), 0, 'start', 'id'),
(int, 'end', (0,1e8), 0, 'end', 'id')]
def load(self, ips):
if not isinstance(ips.data, nx.MultiGraph):
self.app.alert("Please build graph!");
return False;
return True;
def run(self, ips, imgs, para = None):
nodes = nx.shortest_path(ips.data, source=para['start'], target=para['end'], weight='weight')
path = zip(nodes[:-1], nodes[1:])
paths = []
for s,e in path:
ps = ips.data[s][e].values()
pts = sorted([(i['weight'], i['pts']) for i in ps])
paths.append(((s,e), pts[0]))
sknw.draw_graph(ips.img, ips.data)
for i in paths:
ips.img[i[1][1][:,0], i[1][1][:,1]] = 255
data = [(a[0], a[1], b[0]) for a,b in paths]
self.app.show_table(pd.DataFrame(data, columns=['from','to','l']), 'shortest-path')
plgs = [BuildGraph, Statistic, Sumerise, '-', RemoveIsolate, Remove2Node, CutBranch, CutROI, '-', ShortestPath]