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| import os | |
| import sys | |
| import faiss | |
| import numpy as np | |
| from sklearn.cluster import MiniBatchKMeans | |
| from multiprocessing import cpu_count | |
| # Parse command line arguments | |
| exp_dir = str(sys.argv[1]) | |
| index_algorithm = str(sys.argv[2]) | |
| try: | |
| feature_dir = os.path.join(exp_dir, f"extracted") | |
| model_name = os.path.basename(exp_dir) | |
| index_filename_added = f"{model_name}.index" | |
| index_filepath_added = os.path.join(exp_dir, index_filename_added) | |
| if os.path.exists(index_filepath_added): | |
| pass | |
| else: | |
| npys = [] | |
| listdir_res = sorted(os.listdir(feature_dir)) | |
| for name in listdir_res: | |
| file_path = os.path.join(feature_dir, name) | |
| phone = np.load(file_path) | |
| npys.append(phone) | |
| big_npy = np.concatenate(npys, axis=0) | |
| big_npy_idx = np.arange(big_npy.shape[0]) | |
| np.random.shuffle(big_npy_idx) | |
| big_npy = big_npy[big_npy_idx] | |
| if big_npy.shape[0] > 2e5 and ( | |
| index_algorithm == "Auto" or index_algorithm == "KMeans" | |
| ): | |
| big_npy = ( | |
| MiniBatchKMeans( | |
| n_clusters=10000, | |
| verbose=True, | |
| batch_size=256 * cpu_count(), | |
| compute_labels=False, | |
| init="random", | |
| ) | |
| .fit(big_npy) | |
| .cluster_centers_ | |
| ) | |
| n_ivf = min(int(16 * np.sqrt(big_npy.shape[0])), big_npy.shape[0] // 39) | |
| # index_added | |
| index_added = faiss.index_factory(768, f"IVF{n_ivf},Flat") | |
| index_ivf_added = faiss.extract_index_ivf(index_added) | |
| index_ivf_added.nprobe = 1 | |
| index_added.train(big_npy) | |
| batch_size_add = 8192 | |
| for i in range(0, big_npy.shape[0], batch_size_add): | |
| index_added.add(big_npy[i : i + batch_size_add]) | |
| faiss.write_index(index_added, index_filepath_added) | |
| print(f"Saved index file '{index_filepath_added}'") | |
| except Exception as error: | |
| print(f"An error occurred extracting the index: {error}") | |
| print( | |
| "If you are running this code in a virtual environment, make sure you have enough GPU available to generate the Index file." | |
| ) | |