1 INTRODUCTION  
2 TAXONOMY  
2.1 Image Metrics  
2.2 Text-Image Alignment Metrics  
2.3 Types of Quality Measures  
3 METRICS  
3.1 Embedding-based Metrics  
3.2 Content-based Metrics  
3.3 Image-based Metrics  
4 OPTIMIZATION  
4.1 Fine-tuning Image Generators  
4.2 Training Free Optimization  
5 CHALLENGES  
6 GUIDELINES  
6.1 Select Metrics Based on Relevant Characteristics  
6.2 Select Appropriate Evaluation Prompts  
6.3 Normalize Prompts  
6.4 Set Model Parameters  
6.5 Measure Performance  
7 CONCLUSION