update build_gallery and add android demo index support

deploy/python/build_gallery.py

@@ -12,16 +12,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import os
+import pickle
 
 import cv2
 import faiss
 import numpy as np
-from tqdm import tqdm
-import pickle
-
-from paddleclas.deploy.utils import logger, config
-from paddleclas.deploy.python.predict_rec import RecPredictor
 from paddleclas.deploy.python.predict_rec import RecPredictor
+from paddleclas.deploy.utils import config, logger
+from tqdm import tqdm
 
 
 def split_datafile(data_file, image_root, delimiter="\t"):
@@ -53,6 +51,7 @@ class GalleryBuilder(object):
         self.rec_predictor = RecPredictor(config)
         assert 'IndexProcess' in config.keys(), "Index config not found ... "
         self.build(config['IndexProcess'])
+        self.android_demo = config["Global"].get("android_demo", False)
 
     def build(self, config):
         '''
@@ -70,10 +69,88 @@ class GalleryBuilder(object):
             "new", "remove", "append"
         ], "Only append, remove and new operation are supported"
 
+        if self.android_demo:
+            self._create_index_for_android_demo(config, gallery_features, gallery_docs)
+            return
+
         # vector.index: faiss index file
         # id_map.pkl: use this file to map id to image_doc
+        index, ids = None, None
         if operation_method in ["remove", "append"]:
-            # if remove or append, vector.index and id_map.pkl must exist
+            # if remove or append, load vector.index and id_map.pkl
+            index, ids = self._load_index()
+        else:
+            index_method, index, ids = self._create_index(config)
+        if index_method == "HNSW32":
+            logger.warning(
+                "The HNSW32 method dose not support 'remove' operation")
+
+        if operation_method != "remove":
+            # calculate id for new data
+            index, ids = self._add_gallery(index, ids, gallery_features, gallery_docs)
+        else:
+            if index_method == "HNSW32":
+                raise RuntimeError(
+                    "The index_method: HNSW32 dose not support 'remove' operation"
+                )
+            # remove ids in id_map, remove index data in faiss index
+            index, ids = self._rm_id_in_galllery(index, ids, gallery_docs)
+
+        # store faiss index file and id_map file
+        self._save_gallery(config, index, ids)
+
+    def _create_index_for_android_demo(self, config, gallery_features, gallery_docs):
+        if not os.path.exists(config["index_dir"]):
+            os.makedirs(config["index_dir"], exist_ok=True)
+        #build index
+        index = faiss.IndexFlatIP(config["embedding_size"])
+        ids = {}
+
+        # calculate id for new data
+        ids_now = (
+            np.arange(0, len(gallery_images))).astype(np.int64)
+
+        index.add(gallery_features)
+
+        for i, d in zip(list(ids_now), gallery_docs):
+            ids[i] = d
+        self._save_gallery(config, index, ids)
+
+    def _extract_features(self, gallery_images, config):
+        # extract gallery features
+        if config["dist_type"] == "hamming":
+            gallery_features = np.zeros(
+                [len(gallery_images), config['embedding_size'] // 8],
+                dtype=np.uint8)
+        else:
+            gallery_features = np.zeros(
+                [len(gallery_images), config['embedding_size']],
+                dtype=np.float32)
+
+        #construct batch imgs and do inference
+        batch_size = config.get("batch_size", 32)
+        batch_img = []
+        for i, image_file in enumerate(tqdm(gallery_images)):
+            img = cv2.imread(image_file)
+            if img is None:
+                logger.error("img empty, please check {}".format(image_file))
+                exit()
+            img = img[:, :, ::-1]
+            batch_img.append(img)
+
+            if (i + 1) % batch_size == 0:
+                rec_feat = self.rec_predictor.predict(batch_img)
+                gallery_features[i - batch_size + 1:i + 1, :] = rec_feat
+                batch_img = []
+
+        if len(batch_img) > 0:
+            rec_feat = self.rec_predictor.predict(batch_img)
+            gallery_features[-len(batch_img):, :] = rec_feat
+            batch_img = []
+
+        return gallery_features
+
+    def _load_index(self, config):
         assert os.path.join(
             config["index_dir"], "vector.index"
         ), "The vector.index dose not exist in {} when 'index_operation' is not None".format(
@@ -89,7 +166,9 @@ class GalleryBuilder(object):
             ids = pickle.load(fd)
         assert index.ntotal == len(ids.keys(
         )), "data number in index is not equal in in id_map"
-        else:
+        return index, ids
+
+    def _create_index(self, config):
         if not os.path.exists(config["index_dir"]):
             os.makedirs(config["index_dir"], exist_ok=True)
         index_method = config.get("index_method", "HNSW32")
@@ -116,16 +195,12 @@ class GalleryBuilder(object):
                                         index_method, dist_type)
             index = faiss.IndexIDMap2(index)
         ids = {}
+        return index_method, index, ids
 
-        if config["index_method"] == "HNSW32":
-            logger.warning(
-                "The HNSW32 method dose not support 'remove' operation")
-
-        if operation_method != "remove":
-            # calculate id for new data
+    def _add_gallery(self, index, ids, gallery_features, gallery_docs):
         start_id = max(ids.keys()) + 1 if ids else 0
         ids_now = (
-                np.arange(0, len(gallery_images)) + start_id).astype(np.int64)
+            np.arange(0, len(gallery_docs)) + start_id).astype(np.int64)
 
         # only train when new index file
         if operation_method == "new":
@@ -139,12 +214,9 @@ class GalleryBuilder(object):
 
         for i, d in zip(list(ids_now), gallery_docs):
             ids[i] = d
-        else:
-            if config["index_method"] == "HNSW32":
-                raise RuntimeError(
-                    "The index_method: HNSW32 dose not support 'remove' operation"
-                )
-            # remove ids in id_map, remove index data in faiss index
+        return index, ids
+
+    def _rm_id_in_galllery(self, index, ids, gallery_docs)
         remove_ids = list(
             filter(lambda k: ids.get(k) in gallery_docs, ids.keys()))
         remove_ids = np.asarray(remove_ids)
@@ -152,7 +224,9 @@ class GalleryBuilder(object):
         for k in remove_ids:
             del ids[k]
 
-        # store faiss index file and id_map file
+        return index, ids
+
+    def _save_gallery(self, config, index, ids):
         if config["dist_type"] == "hamming":
             faiss.write_index_binary(
                 index, os.path.join(config["index_dir"], "vector.index"))
@@ -163,40 +237,6 @@ class GalleryBuilder(object):
         with open(os.path.join(config["index_dir"], "id_map.pkl"), 'wb') as fd:
             pickle.dump(ids, fd)
 
-    def _extract_features(self, gallery_images, config):
-        # extract gallery features
-        if config["dist_type"] == "hamming":
-            gallery_features = np.zeros(
-                [len(gallery_images), config['embedding_size'] // 8],
-                dtype=np.uint8)
-        else:
-            gallery_features = np.zeros(
-                [len(gallery_images), config['embedding_size']],
-                dtype=np.float32)
-
-        #construct batch imgs and do inference
-        batch_size = config.get("batch_size", 32)
-        batch_img = []
-        for i, image_file in enumerate(tqdm(gallery_images)):
-            img = cv2.imread(image_file)
-            if img is None:
-                logger.error("img empty, please check {}".format(image_file))
-                exit()
-            img = img[:, :, ::-1]
-            batch_img.append(img)
-
-            if (i + 1) % batch_size == 0:
-                rec_feat = self.rec_predictor.predict(batch_img)
-                gallery_features[i - batch_size + 1:i + 1, :] = rec_feat
-                batch_img = []
-
-        if len(batch_img) > 0:
-            rec_feat = self.rec_predictor.predict(batch_img)
-            gallery_features[-len(batch_img):, :] = rec_feat
-            batch_img = []
-
-        return gallery_features
-
 
 def main(config):
     GalleryBuilder(config)