Digital Image Analysis and Pattern Recognition of the Artistic Expression and Evolution of Lotus Patterns in Goguryeo Murals in Ji'an

Ancient Chinese murals have a splendid history in ancient times, experiencing thousands of years and countless dynasties. There have been artistic classics such as Dunhuang murals that are still applauded, and the murals of Goguryeo in Ji'an are also impressive. Through systematically combing and analyzing the lotus pattern in the Goguryeo murals in Ji'an, this paper reveals the artistic expression, style changes, and cultural factors behind the lotus pattern in different historical periods. It is found that the lotus pattern in the Goguryeo period not only showed an evolution trend from simplicity to complexity and from realism to abstraction in form but also reflected the profound transformation from nature worship to Buddhist belief to royal power symbolism in meaning. However, due to the age of the murals and the interference of natural climate and artificial damage, most of the murals have been damaged, falling off, cracks, and other pathological problems, which need to be protected urgently. Therefore, the combination of mural restoration and computer technology, the use of digital technology, vision and pattern recognition technology, the restoration of mural images for automated pattern recognition and analysis of mural paintings to assist in virtual restoration, not only for artificial restoration to provide an important and practical significance of the value of the reference, but also after the restoration of the mural paintings for the digitization of long-term preservation.