Comparative analysis of information tendency and application features for projection mapping technologies at cultural heritage sites

With the rapid development of interactive technologies using projection mapping (PJM), these digital technologies have introduced new interpretative possibilities for the presentation of cultural heritage sites. PJM attracts more visitors with greater expectations to cultural heritage sites through its excellent visual effects and guidance capabilities. In the past decade, especially after 2015, design events have frequently introduced digital projections to cultural heritage sightseeing spots worldwide. However, this trend has also led to the emergence of many digital projection events that merely exhibit beautiful projection effects on buildings and neglect to show the history and value of the cultural heritage site. Based on this phenomenon, this study compiled and analyzed 45 related cases of PJM applications at cultural heritage sites around the world from the past 5 years. These 45 examples were studied by disassembling the projection content, analyzing the information characteristics exhibited in each projection video, and arranging the obtained data on a timeline chart for analysis. According to the data, two information characteristics of PJM at cultural heritage sites can be observed: “the relationship between projection content and heritage” and “information tendency.” The advantages and limitations of these characteristics were distinguished and suggestions for the application of PJM on cultural heritage sites were derived. These results can be used as a reference for other research studies on visitors to cultural heritage sites and improving digital interpretation and presentation designs.