This brief presents a comprehensive introduction to feature coding, which serves as a key module for the typical object recognition pipeline. The text offers a rich blend of theory and practice while reflects the recent developments on feature coding, covering the following five aspects: (1) Review the state-of-the-art, analyzing the motivations and mathematical representations of various feature coding methods; (2) Explore how various feature coding algorithms evolve along years; (3) Summarize the main characteristics of typical feature coding algorithms and categorize them accordingly; (4) Discuss the applications of feature coding in different visual tasks, analyze the influence of some key factors in feature coding with intensive experimental studies; (5) Provide the suggestions of how to apply different feature coding methods and forecast the potential directions for future work on the topic. It is suitable for students, researchers, practitioners interested in object recognition.

Overviews all the aspects of feature coding, from motivation, mathematical representation to applications in practice Review the state-of-the-art and explore the evolvement of various algorithms Categorize the existing typical feature coding algorithms and summarize the characteristics Provide the suggestions of employing feature coding in practice and forecast potential directions of this area Supplies supplementary materials such as source codes of the algorithm framework and all related feature coding algorithms at the associated website, http://www.openpr.org.cn/index.php/All/92-Evaluation-toolkit/View-details.html Includes supplementary material: sn.pub/extras