|WikiProject Computer graphics||(Rated Stub-class)|
|WikiProject Electrical engineering|
To mention some popular chain codes, they are: Freeman Chain Code of Eight Directions1 (FCCE), Vertex Chain Code2 (VCC), Three OrThogonal symbol chain code3 (3OT) and Directional Freeman Chain Code4 (DFCC).
 H., Freeman. On the encoding of arbitrary geometric configurations, IRE Transactions on Electronic Computers EC- 10(1961) 260-268.
 E. Bribiesca, A new chain code, Pattern Recognition 32 (1999) 235–251.
 H. Sánchez-Cruz, R. M. Rodríguez-Dagnino. Compressing bi-level images by means of a 3-bit chain code. Optical Engineering. SPIE. 44 (9) 097004 (2005) 1-8.
 Y.K. Liu, B.Zalik, And efficient chain code with Huffman coding, Pattern Recogni- tion 38 (4) (2005) 553-557.