**6. Conclusion**

The evaluations and analyses presented in this Chapter characterize the loss in perceived interpretability of motion imagery arising from various compression methods and compression rates. The findings build on previous studies (Irvine *et al.* 2007a; O'Brien *et al.* 2007). The findings are consistent with other evaluations of video compression (Gibson *et al.* 2006; Young *et al.* 2010a). Evaluation of image compression for motion imagery illustrates how interpretability-based methods can be applied to the analysis of the image chain. We present both objective image metrics and analysts' assessments of various compressed products. The results show good agreement between the two approaches. Further research is needed to validate a model-based relationship that could predict Video NIIRS loss due to compression using the objective image metrics presented here.
