1 Introduction
1.1 Brief history of human temperature measurement
1.2 Thermal imaging (thermography) technology
1.3 Mobile thermal imaging
1.4 Article Organization and Contributions

2 Physiological thermal signatures
2.1 Computational pipeline: an overview
2.2 Cardiovascular thermal signature
2.3 Perspiratory thermal signature
2.4 Respiratory thermal signature
2.5 Muscular thermal signature

3 Thermal imaging as a measure of affective states
3.1 Thermal directional change and affective states
3.2 Automated affect recognition
3.3 A summary of experimental protocol and data analysis
3.4 A summary of specifications of thermal imaging systems used in the literature

4 Challenges and opportunities
4.1 Beyond thermal directional changes: Diversifying metrics for real-world applications
4.2 ROI tracking and Ambient temperature effect
4.3 Evaluation, Datasets and Toolkits

5 Summary