--- a/transformations/pipeline.py	Wed Feb 03 16:42:59 2010 -0500
+++ b/transformations/pipeline.py	Wed Feb 03 17:08:27 2010 -0500
@@ -1,57 +1,208 @@
+#!/usr/bin/python
+# coding: utf-8
+
 from __future__ import with_statement
 
-import sys, os
+import sys, os, getopt
 import numpy
 import filetensor as ft
 import random
 
-BATCH_SIZE = 100
+# This is intended to be run as a GIMP script
+from gimpfu import *
 
-#import <modules> and stuff them in mods below
+DEBUG = True
+BATCH_SIZE = 100
+DEFAULT_NIST_PATH = '/data/lisa/data/nist/by_class/all/all_train_data.ft'
+ARGS_FILE = os.environ['PIPELINE_ARGS_TMPFILE']
+
+if DEBUG:
+    import pylab
+    pylab.ion()
 
-mods = []
+#from add_background_image import AddBackground
+#from affine_transform import AffineTransformation
+#from PoivreSel import PoivreSel
+from thick import Thick
+#from BruitGauss import BruitGauss
+#from gimp_script import GIMPTransformation
+#from Rature import Rature
+#from contrast Contrast
+from local_elastic_distortions import LocalElasticDistorter
+from slant import Slant
+
+MODULE_INSTANCES = [Thick(), LocalElasticDistorter(), Slant()]
 
-# DANGER: HIGH VOLTAGE -- DO NOT EDIT BELOW THIS LINE
-# -----------------------------------------------------------
+class Pipeline():
+    def __init__(self, modules, num_batches, batch_size, image_size=(32,32)):
+        self.modules = modules
+        self.num_batches = num_batches
+        self.batch_size = batch_size
+        self.num_params_stored = 0
+        self.image_size = image_size
+
+        self.init_memory()
+
+    def init_num_params_stored(self):
+        # just a dummy call to regenerate_parameters() to get the
+        # real number of params (only those which are stored)
+        self.num_params_stored = 0
+        for m in self.modules:
+            self.num_params_stored += len(m.regenerate_parameters(0.0))
+
+    def init_memory(self):
+        self.init_num_params_stored()
 
-outf = sys.argv[1]
-paramsf = sys.argv[2]
-dataf = '/data/lisa/data/nist/by_class/all/all_train_data.ft'
-if len(sys.argv) >= 4:
-    dataf = sys.argv[3]
+        total = (self.num_batches + 1) * self.batch_size
+        num_px = self.image_size[0] * self.image_size[1]
+
+        self.res_data = numpy.empty((total, num_px))
+        self.params = numpy.empty((total, self.num_params_stored))
+
+    def run(self, batch_iterator, complexity_iterator):
+        img_size = self.image_size
+
+        for batch_no, batch in enumerate(batch_iterator):
+            complexity = complexity_iterator.next()
+
+            assert len(batch) == self.batch_size
+
+            for img_no, img in enumerate(batch):
+                sys.stdout.flush()
+                global_idx = batch_no*self.batch_size + img_no
+
+                img = img.reshape(img_size)
 
-train_data = open(dataf, 'rb')
+                param_idx = 0
+                for mod in self.modules:
+                    # This used to be done _per batch_,
+                    # ie. out of the "for img" loop                   
+                    p = mod.regenerate_parameters(complexity)
+                    self.params[global_idx, param_idx:param_idx+len(p)] = p
+                    param_idx += len(p)
 
-dim = tuple(ft._read_header(train_data)[3])
+                    img = mod.transform_image(img)
+
+                self.res_data[global_idx] = \
+                        img.reshape((img_size[0] * img_size[1],))*255
 
-res_data = numpy.empty(dim, dtype=numpy.int8)
+                pylab.imshow(img)
+                pylab.draw()
+
+    def write_output(self, output_file_path, params_output_file_path):
+        with open(output_file_path, 'wb') as f:
+            ft.write(f, self.res_data)
 
-all_settings = ['complexity']
+        numpy.save(params_output_file_path, self.params)
+                
+
+##############################################################################
+# COMPLEXITY ITERATORS
+# They're called once every batch, to get the complexity to use for that batch
+# they must be infinite (should never throw StopIteration when calling next())
 
-for mod in mods:
-    all_settings += mod.get_settings_names()
+# probability of generating 0 complexity, otherwise
+# uniform over 0.0-max_complexity
+def range_complexity_iterator(probability_zero, max_complexity):
+    assert max_complexity <= 1.0
+    n = numpy.random.uniform(0.0, 1.0)
+    while True:
+        if n < probability_zero:
+            yield 0.0
+        else:
+            yield numpy.random.uniform(0.0, max_complexity)
+
+##############################################################################
+# DATA ITERATORS
+# They can be used to interleave different data sources etc.
+
+class NistData():
+    def __init__(self, ):
+        nist_path = DEFAULT_NIST_PATH
+        self.train_data = open(nist_path, 'rb')
+        self.dim = tuple(ft._read_header(self.train_data)[3])
 
-params = numpy.empty(((dim[0]/BATCH_SIZE)+1, len(all_settings)))
+def just_nist_iterator(nist, batch_size, stop_after=None):
+    for i in xrange(0, nist.dim[0], batch_size):
+        nist.train_data.seek(0)
+        yield ft.read(nist.train_data, slice(i, i+batch_size)).astype(numpy.float32)/255
+
+        if not stop_after is None and i >= stop_after:
+            break
+
+##############################################################################
+# MAIN
+
+def usage():
+    print '''
+Usage: run_pipeline.sh [-m ...] [-z ...] [-o ...] [-p ...]
+    -m, --max-complexity: max complexity to generate for a batch
+    -z, --probability-zero: probability of using complexity=0 for a batch
+    -o, --output-file: full path to file to use for output of images
+    -p, --params-output-file: path to file to output params to
+    '''
+
+# See run_pipeline.py
+def get_argv():
+    with open(ARGS_FILE) as f:
+        args = [l.rstrip() for l in f.readlines()]
+    return args
 
-for i in xrange(0, dim[0], BATCH_SIZE):
-    train_data.seek(0)
-    imgs = ft.read(train_data, slice(i, i+BATCH_SIZE)).astype(numpy.float32)/255
-    
-    complexity = random.random()
-    p = i/BATCH_SIZE
-    j = 1
-    for mod in mods:
-        par = mod.regenerate_parameters(complexity)
-        params[p, j:j+len(par)] = par
-        j += len(par)
-    
-    for k in range(imgs.shape[0]):
-        c = imgs[k].reshape((32, 32))
-        for mod in mods:
-            c = mod.transform_image(c)
-        res_data[i+k] = c.reshape((1024,))*255
+# Might be called locally or through dbidispatch. In all cases it should be
+# passed to the GIMP executable to be able to use GIMP filters.
+# Ex: 
+def main():
+    max_complexity = 0.5 # default
+    probability_zero = 0.1 # default
+    output_file_path = None
+    params_output_file_path = None
+    stop_after = None
 
-with open(outf, 'wb') as f:
-    ft.write(f, res_data)
+    try:
+        opts, args = getopt.getopt(get_argv(), "m:z:o:p:s:", ["max-complexity=", "probability-zero=", "output-file=", "params-output-file=", "stop-after="])
+    except getopt.GetoptError, err:
+        # print help information and exit:
+        print str(err) # will print something like "option -a not recognized"
+        usage()
+        sys.exit(2)
+    output = None
+    verbose = False
+    for o, a in opts:
+        if o in ('-m', '--max-complexity'):
+            max_complexity = float(a)
+            assert max_complexity >= 0.0 and max_complexity <= 1.0
+        elif o in ("-z", "--probability-zero"):
+            probability_zero = float(a)
+            assert probability_zero >= 0.0 and probability_zero <= 1.0
+        elif o in ("-o", "--output-file"):
+            output_file_path = a
+        elif o in ('-p', "--params-output-file"):
+            params_output_file_path = a
+        elif o in ('-s', "--stop-after"):
+            stop_after = int(a)
+        else:
+            assert False, "unhandled option"
 
-numpy.save(paramsf, params)
+    if output_file_path == None or params_output_file_path == None:
+        print "Must specify both output files."
+        print
+        usage()
+        sys.exit(2)
+
+    nist = NistData()
+    num_batches = nist.dim[0]/BATCH_SIZE
+    if stop_after:
+        num_batches = stop_after
+    pl = Pipeline(modules=MODULE_INSTANCES, num_batches=num_batches, batch_size=BATCH_SIZE, image_size=(32,32))
+    cpx_it = range_complexity_iterator(probability_zero, max_complexity)
+    batch_it = just_nist_iterator(nist, BATCH_SIZE, stop_after)
+
+    pl.run(batch_it, cpx_it)
+    pl.write_output(output_file_path, params_output_file_path)
+
+main()
+
+pdb.gimp_quit(0)
+pylab.ioff()
+pylab.show()
+