week3/problem1/server.py

   1
   2 import SimpleXMLRPCServer
   3
   4 import numpy as np
   5 from scipy import signal
   6
   7 import image
   8
   9 image.outdir = 'server_data'
  10
  11 class ImageManipulation(object):
  12         def __init__(self):
  13                 self.log_index = 0
  14
  15         def __server_method(self,imagestr,fxchan):
  16                 ''' Generic server method for processing an image, marshalling, saving data products '''
  17                 x = image.unmarshal(imagestr)
  18                 image.save_image('raw%d.jpg'%(self.log_index),x)
  19
  20                 y = image.process_image(x,fxchan)
  21
  22                 image.save_image('final%d.jpg'%(self.log_index),y)
  23
  24                 self.log_index += 1
  25
  26                 return image.marshal(y)
  27
  28         def double(self,imagestr):
  29                 ''' Double size of an image by assuming image is band limited '''
  30                 def fxchan(x):
  31                         x = signal.resample(x,x.shape[0]*2,axis=0,window='boxcar')
  32                         x = signal.resample(x,x.shape[1]*2,axis=1,window='boxcar')
  33                         return x
  34
  35                 return self.__server_method(imagestr,fxchan)
  36
  37         def rot180(self,imagestr):
  38                 ''' Rotate image by 180 degrees '''
  39                 def fxchan(x):
  40                         return x[::-1]
  41
  42                 return self.__server_method(imagestr,fxchan)
  43
  44         def invert_color(self,imagestr):
  45                 ''' Flip intensities '''
  46                 def fxchan(x):
  47                         return 255 - x
  48
  49                 return self.__server_method(imagestr,fxchan)
  50
  51 host,port = "localhost",5020
  52
  53 server = SimpleXMLRPCServer.SimpleXMLRPCServer((host,port),allow_none=True)
  54 server.register_instance(ImageManipulation())
  55 server.register_multicall_functions()
  56 server.register_introspection_functions()
  57
  58 print "Server running on ",host,port
  59 server.serve_forever()
  60
  61