Python Manifold.do_embedding Examples

Example #1

#!/usr/bin/python

import Manifold
import ManifoldVTK
import Utils
import operator
import sys
import numpy

coords = Utils.read_point_file("./datasets/swissroll.txt")

embedded_coords, mapping = Manifold.do_embedding(coords, k=10)

coords = coords.take(mapping, axis=0)
nb_points = len(coords)

# sorting
sorted_index = list(index
                    for index, item in sorted(enumerate(embedded_coords[:, 0]),
                                              key=operator.itemgetter(1)))

colors = [(255, 255, 255) for i in range(0, nb_points)]
for i in range(0, nb_points):
    if i < nb_points / 2:
        f = float(i) / float(nb_points / 2)
        color = (0, f * 255, 255 - f * 255)
        #color = ( 0, 0, 255 )
    else:
        f = float(i - nb_points / 2) / float(nb_points / 2)
        color = (f * 255, 255 - f * 255, 0)
        #color = ( 255, 0, 0 )

Example #2

#!/usr/bin/python

import Manifold
import ManifoldPIL
import Utils
from glob import glob
import argparse

parser = argparse.ArgumentParser(usage="usage: %(prog)s directory")
parser.add_argument('image_directory',
                    metavar='image_directory',
                    help='directory of images to process')
args = parser.parse_args()

filenames = glob(args.image_directory + '/*')

coords = Utils.read_images(filenames)

embedded_coords, mapping = Manifold.do_embedding(coords, tree='spilltree')

ManifoldPIL.render2D([filenames[i] for i in mapping], embedded_coords)

Example #3

File: demo_swissroll.py Project: kevin-keraudren/MSc-code

#!/usr/bin/python

import Manifold
import ManifoldVTK
import Utils
import operator
import sys
import numpy

coords = Utils.read_point_file("./datasets/swissroll.txt")

embedded_coords, mapping = Manifold.do_embedding(coords,k=10)

coords = coords.take(mapping,axis=0)
nb_points = len(coords)
    
# sorting
sorted_index =  list( index for index, item in sorted( enumerate( embedded_coords[:,0] ),
                                                       key=operator.itemgetter(1)
                                                       ) )

colors = [(255,255,255) for i in range(0,nb_points)]
for i in range(0,nb_points):
    if i < nb_points / 2:
        f = float(i) / float(nb_points / 2)
        color = ( 0, f*255, 255 - f*255 )
        #color = ( 0, 0, 255 )
    else:
        f = float(i - nb_points / 2) / float(nb_points / 2)
        color = ( f*255, 255 - f*255, 0 )
        #color = ( 255, 0, 0 )

Example #4

File: image_manifold.py Project: kevin-keraudren/MSc-code

#!/usr/bin/python

import Manifold
import ManifoldPIL
import Utils
from glob import glob
import argparse

parser = argparse.ArgumentParser(
    usage = "usage: %(prog)s directory" )
parser.add_argument(
    'image_directory',
    metavar='image_directory',        
    help='directory of images to process' )
args = parser.parse_args()

filenames = glob(args.image_directory + '/*')

coords = Utils.read_images(filenames)

embedded_coords, mapping = Manifold.do_embedding(coords,tree='spilltree')

ManifoldPIL.render2D([ filenames[i] for i in mapping], embedded_coords)