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PQ→KMeansでは誤差が大きくなる #11

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atksh opened this issue Jun 22, 2023 · 1 comment

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atksh commented Jun 22, 2023

annax/src/annax/index.py

Lines 177 to 180 in 566aa3e

    
           codebooks = pq(data, self.sub_dim, n_iter=self.n_iter, batch_size=self.batch_size, k=self.k) 
        
           prod_tables = calc_prod_table(codebooks) 
        
           encoded_data = encode(prep(data, self.sub_dim), codebooks) 
        
           codebook = kmeans(data, self.nlist, n_iter=self.n_iter, batch_size=self.batch_size)

kmeansかけて、そのあと、そのセントロイドからかくデータ点の距離 (residual) をquantizeするのが定石らしい。

atksh assigned tomoki0924

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atksh commented Jun 22, 2023

assinged to @tomoki0924

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