Create build_gallery.py

deploy/python/build_gallery.py

+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import sys
+
+__dir__ = os.path.dirname(os.path.abspath(__file__))
+sys.path.append(os.path.abspath(os.path.join(__dir__, '../')))
+
+import copy
+import cv2
+import numpy as np
+from tqdm import tqdm
+
+from python.predict_rec import RecPredictor
+from vector_search import Graph_Index
+
+from utils import logger
+from utils import config
+
+
+def split_datafile(data_file, image_root, delimiter="\t"):
+    '''
+        data_file: image path and info, which can be splitted by spacer 
+        image_root: image path root
+        delimiter: delimiter 
+    '''
+    gallery_images = []
+    gallery_docs = []
+    with open(data_file) as f:
+        lines = f.readlines()
+        for i, line in enumerate(lines):
+            line = line.strip().split(delimiter)
+            image_file = os.path.join(image_root, line[0])
+            image_doc = line[1] 
+            gallery_images.append(image_file)
+            gallery_docs.append(image_doc)
+
+    return gallery_images, gallery_docs
+
+
+class GalleryBuilder(object):
+    def __init__(self, config):
+
+        self.config = config
+        self.rec_predictor = RecPredictor(config)
+        assert 'IndexProcess' in config.keys(), "Index config not found ... "
+        self.build(config['IndexProcess'])
+
+
+    def build(self, config):
+        '''
+            build index from scratch
+        '''
+        gallery_images, gallery_docs = split_datafile(config['data_file'], 
+            config['image_root'], config['delimiter'])
+
+        # extract gallery features
+        gallery_features = np.zeros([len(gallery_images), 
+            config['embedding_size']], dtype=np.float32)
+
+        for i, image_file in enumerate(tqdm(gallery_images)):
+            img = cv2.imread(image_file)[:, :, ::-1]
+            rec_feat = self.rec_predictor.predict(img)
+            gallery_features[i,:] = rec_feat
+
+        # train index 
+        self.Searcher = Graph_Index(dist_type=config['dist_type']) 
+        self.Searcher.build(gallery_vectors=gallery_features, gallery_docs=gallery_docs, 
+            pq_size=config['pq_size'], index_path=config['index_path'])
+            
+
+def main(config):
+    system_builder = GalleryBuilder(config)
+    return
+
+
+if __name__ == "__main__":
+    args = config.parse_args()
+    config = config.get_config(args.config, overrides=args.override, show=True)
+    main(config)