Added -seeds option to provide seeds from disk

enhance.py

@@ -47,6 +47,7 @@
 add_arg('--train-blur',         default=None, type=int,             help='Sigma value for gaussian blur preprocess.')
 add_arg('--train-noise',        default=None, type=float,           help='Radius for preprocessing gaussian blur.')
 add_arg('--train-jpeg',         default=[], nargs='+', type=int,    help='JPEG compression level & range in preproc.')
+add_arg('--seeds',              default=False, type=str,            help='File pattern to load for training seeds.')
 add_arg('--epochs',             default=10, type=int,               help='Total number of iterations in training.')
 add_arg('--epoch-size',         default=72, type=int,               help='Number of batches trained in an epoch.')
 add_arg('--save-every',         default=10, type=int,               help='Save generator after every training epoch.')
@@ -128,6 +129,28 @@ def extend(lst): return itertools.chain(lst, itertools.repeat(lst[-1]))
 
 print('{}  - Using the device `{}` for neural computation.{}\n'.format(ansi.CYAN, theano.config.device, ansi.ENDC))
 
+def confirm_pairs(list1, list2):
+    new_list1 = []
+    new_list2 = []
+    cur1 = 0
+    cur2 = 0
+    len1 = len(list1)
+    len2 = len(list2)
+    while(cur1 < len1 and cur2 < len2):
+        base1 = os.path.basename(list1[cur1])
+        base2 = os.path.basename(list2[cur2])
+        if base1 == base2:
+            new_list1.append(list1[cur1])
+            new_list2.append(list2[cur2])
+            cur1 = cur1 + 1
+            cur2 = cur2 + 1
+        elif base1 < base2:
+            # continue to look on list1, don't iterate list2
+            cur1 = cur1 + 1
+        else:
+            cur2 = cur2 + 1
+    print("List sizes went from {}, {} to {}, {}".format(len1, len2, len(new_list1), len(new_list2)))
+    return new_list1, new_list2
 
 #======================================================================================================================
 # Image Processing
@@ -143,11 +166,17 @@ def __init__(self):
 
         self.orig_buffer = np.zeros((args.buffer_size, 3, self.orig_shape, self.orig_shape), dtype=np.float32)
         self.seed_buffer = np.zeros((args.buffer_size, 3, self.seed_shape, self.seed_shape), dtype=np.float32)
-        self.files = glob.glob(args.train)
+        self.files = sorted(glob.glob(args.train))
         if len(self.files) == 0:
             error("There were no files found to train from searching for `{}`".format(args.train),
                   "  - Try putting all your images in one folder and using `--train=data/*.jpg`")
 
+        if args.seeds:
+            self.seeds = sorted(glob.glob(args.seeds))
+            self.files, self.seeds = confirm_pairs(self.files, self.seeds)
+        else:
+            self.seeds = False
+
         self.available = set(range(args.buffer_size))
         self.ready = set()
 
@@ -156,11 +185,14 @@ def __init__(self):
 
     def run(self):
         while True:
-            random.shuffle(self.files)
-            for f in self.files:
-                self.add_to_buffer(f)
+            indices = list(range(0, len(self.files)))
+            random.shuffle(indices)
+
+            for file_index in indices:
+                self.add_to_buffer(file_index)
 
-    def add_to_buffer(self, f):
+    def add_to_buffer(self, file_index):
+        f = self.files[file_index]
         filename = os.path.join(self.cwd, f)
         try:
             orig = PIL.Image.open(filename).convert('RGB')
@@ -172,14 +204,37 @@ def add_to_buffer(self, f):
         except Exception as e:
             warn('Could not load `{}` as image.'.format(filename),
                  '  - Try fixing or removing the file before next run.')
-            self.files.remove(f)
+            del self.files[file_index]
+            if self.seeds:
+                del self.seeds[file_index]
             return
 
-        seed = orig
-        if args.train_blur is not None:
-            seed = seed.filter(PIL.ImageFilter.GaussianBlur(radius=random.randint(0, args.train_blur*2)))
-        if args.zoom > 1:
-            seed = seed.resize((orig.size[0]//args.zoom, orig.size[1]//args.zoom), resample=PIL.Image.LANCZOS)
+        # determine seed
+        if self.seeds:
+            # file based seed
+            f = self.seeds[file_index]
+            filename = os.path.join(self.cwd, f)
+            try:
+                seed = PIL.Image.open(filename).convert('RGB')
+                if any(s < self.seed_shape for s in seed.size):
+                    raise ValueError('Image is too small for seed size (found {}, expected {})'.format(seed.size, self.seed_shape))
+            except Exception as e:
+                warn('Could not load `{}` as seed image.'.format(filename),
+                     '  - Try fixing or removing the file before next run. ({})'.format(e))
+                del self.files[file_index]
+                del self.seeds[file_index]
+                return
+
+        else:
+            # synthetic seed
+            seed = orig
+            # optionally blur before scaling
+            if args.train_blur is not None:
+                seed = seed.filter(PIL.ImageFilter.GaussianBlur(radius=random.randint(0, args.train_blur*2)))
+            # seed is scaled down version of original
+            if args.zoom > 1:
+                seed = seed.resize((orig.size[0]//args.zoom, orig.size[1]//args.zoom), resample=PIL.Image.LANCZOS)
+
         if len(args.train_jpeg) > 0:
             buffer, rng = io.BytesIO(), args.train_jpeg[-1] if len(args.train_jpeg) > 1 else 15
             seed.save(buffer, format='jpeg', quality=args.train_jpeg+random.randrange(-rng, +rng))