MOJI: Enhancing Emoji Search System with Query Expansions and Emoji Recommendations

Figure 1: The MOJI system interface design.(1) The keywordemoji picker that supports query expansion (2) The emoji preview that presents emoji prediction (3) The refresh button for new suggestionsThe text-based emoji search, despite its widespread use and extensive variety of emojis, has received limited attention in terms of understanding user challenges and identifying ways to support users.In our formative study, we found the bottlenecks in textbased emoji searches, focusing on challenges in finding appropriate search keywords and user modification strategies for unsatisfying searches.Building on these findings, we introduce MOJI, an emoji entry system supporting 1) query expansion with content-relevant multi-dimensional keywords reflecting users' modification strategies and 2) emoji recommendations that belong to each search query.The comparison study demonstrated that our system reduced the time required to finalize search keywords compared to traditional text-based methods.Additionally, users achieved higher satisfaction in final emoji selections through easy attempts and modifications on search queries, without increasing the overall selection time.We also present a comparison of emoji suggestion algorithms (GPT and iOS) to support query expansion.