Method loadDctHash

testutil/image_hash.go:227–239

loadDctHash reads a DCT hash from a reader

(r io.Reader)

// loadDctHash reads a DCT hash from a reader
func (h *ImageHash) loadDctHash(r io.Reader) error {
	var length uint16
	if err := binary.Read(r, binary.LittleEndian, &length); err != nil {
		return fmt.Errorf("failed to read DCT hash length: %w", err)
	}

	h.dctHash = make([]float32, length)
	if err := binary.Read(r, binary.LittleEndian, h.dctHash); err != nil {
		return fmt.Errorf("failed to read DCT hash values: %w", err)
	}

	return nil
}

// dctHashDistance calculates the distance between two DCT hashes
func (h *ImageHash) dctHashDistance(other *ImageHash) float32 {