66 lines
1.2 KiB
Go
66 lines
1.2 KiB
Go
package entity
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import (
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"encoding/json"
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"strings"
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"github.com/photoprism/photoprism/pkg/clusters"
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)
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type Embedding = []float64
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// Embeddings represents an embedding cluster.
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type Embeddings = []Embedding
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// EmbeddingsMidpoint returns the embeddings vector midpoint.
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func EmbeddingsMidpoint(m Embeddings) (result Embedding, radius float64, count int) {
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count = len(m)
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for i, emb := range m {
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if i == 0 {
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result = emb
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continue
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}
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if len(m[i]) != len(m[i-1]) {
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continue
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}
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for j, val := range result {
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result[j] = (val + emb[j]) / 2
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}
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if d := clusters.EuclideanDistance(result, emb); d > radius {
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radius = d + 0.01
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}
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}
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return result, radius, count
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}
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// UnmarshalEmbeddings parses face embedding JSON.
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func UnmarshalEmbeddings(s string) (result Embeddings) {
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if !strings.HasPrefix(s, "[[") {
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return nil
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}
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if err := json.Unmarshal([]byte(s), &result); err != nil {
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log.Errorf("faces: %s", err)
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}
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return result
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}
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// UnmarshalEmbedding parses a single face embedding JSON.
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func UnmarshalEmbedding(s string) (result Embedding) {
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if !strings.HasPrefix(s, "[") {
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return nil
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}
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if err := json.Unmarshal([]byte(s), &result); err != nil {
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log.Errorf("faces: %s", err)
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}
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return result
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}
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