Fig. 1. Basic flow of traceability system

Fig. 2. Hole plate standard design and CMM measurement. (a) Hole plate diagram; (b) hole point distribution; (c) CMM measurement; (d) hole plate standard

Fig. 3. CT scanning and error evaluation. (a) Geometric parameter extraction; (b) results of CT error evaluation

Fig. 4. Typical lattice structure cell. (a) Body-centered cubic; (b) regular octahedron unit; (c) dodecahedron unit

Fig. 5. Contour feature extraction. (a) CT image; (b) extraction of center point of contour

Fig. 6. Characteristic geometric skeleton generation of BCC. (a) Data structure; (b) central point acquisition; (c) center point linear fitting

Fig. 7. Feature points and center point of lattice structure. (a) Pseudo-code for feature point extraction; (b) schematic of lattice structure feature points and center point

Fig. 8. BCC lattice structure. (a) BCC lattice unit ; (b) additive manufacturing part with BCC lattice; (c) local area amplification

Fig. 9. BCC skeleton line extraction. (a) CT photo; (b) spacing ordering of 3×3 lattice elements; (c) extracted spatial skeleton line

Fig. 10. Results of BCC periodic interval detection. (a) Measurement results at upper left; (b) measurement results at upper right; (c) measurement results at lower left; (d) measurement results at lower right

Fig. 11. Comparison of experimental analysis. (a) Measurement results of profile projection; (b) measurement results of the proposed algorithm

Fig. 12. Influence of image quantity on measurement results