week3/problem1/client.py

   1
   2 import xmlrpclib
   3 import sys
   4
   5 import numpy as np
   6 from scipy import signal
   7
   8 import image
   9
  10 image.outdir = 'client_data'
  11
  12 imgfn = 'halfdome_from_northdome.jpg'
  13
  14 host,port = "localhost",5020
  15
  16 server = xmlrpclib.ServerProxy("http://%s:%d"%(host,port))
  17 available_methods = server.system.listMethods()
  18
  19 print available_methods
  20
  21 print server.system.methodHelp('double')
  22 print server.system.methodHelp('rot180')
  23 print server.system.methodHelp('invert_color')
  24
  25 def wrap_server(f,img):
  26         ''' Run server method f on img, marshalling and unmarshalling the img '''
  27         return image.unmarshal(f(image.marshal(img)))
  28
  29 ''' Methods to undo server methods '''
  30 def halve_image(img):
  31         ''' Inverse of double '''
  32         def fxchan(x):
  33                 x = signal.resample(x,x.shape[0]/2,axis=0,window='boxcar')
  34                 x = signal.resample(x,x.shape[1]/2,axis=1,window='boxcar')
  35                 return x
  36
  37         return image.process_image(img,fxchan)
  38
  39 def rot180(img):
  40         ''' Inverse of 180 degree rotation '''
  41         def fxchan(x):
  42                 return x[::-1]
  43
  44         return image.process_image(img,fxchan)
  45
  46 def invert_color(img):
  47         ''' Inverse of flipping intensities '''
  48         def fxchan(x):
  49                 return 255 - x
  50
  51         return image.process_image(img,fxchan)
  52
  53
  54 index = 0
  55 img = image.load_image(imgfn)
  56
  57 def runtest(srv,cli):
  58         global index
  59         image.save_image('raw%d.jpg'%index,img)
  60
  61         img_mod = wrap_server(srv,img)
  62
  63         image.save_image('mod%d.jpg'%index,img_mod)
  64
  65         img_res = cli(img_mod)
  66
  67         image.save_image('res%d.jpg'%index,img_res)
  68
  69         index += 1
  70
  71 def runtest_client(cli):
  72         global index
  73         image.save_image('raw%d.jpg'%index,img)
  74
  75         img_res = cli(img)
  76
  77         image.save_image('res%d.jpg'%index,img_res)
  78         index += 1
  79
  80 runtest(server.double,halve_image)
  81 runtest(server.rot180,rot180)
  82 runtest(server.invert_color,invert_color)
  83