Reflections such as glint are only seen over a small angular range around the Bi-directional Reflectance Difference Function (BRDF) specular lobe. When modelling a target for input to detection codes it is essential that these types of reflection are modelled accurately as they can have a significant impact on detection range. This paper investigates the use of CameoSim to model the glint effects from 3-D curved shapes in the 3-5µm band. Methods investigated to increase accuracy are: increasing the number of facets, using vertex averaging and the use of true geometry to successfully model IR glint effects. Conclusions are drawn as to the way forward for high fidelity modelling.
For a variety of training and simulation purposes even photo-realistic synthetic imagery is inadequate because of the impact of subtle effects on the eye and on other sensors. It is essential that the synthetic imagery is a physically accurate representation of the real-world and captures all the inherent variability of different backgrounds. CAMEO-SIM has been developed to meet these requirements. Recent work has improved the atmospheric modelling and thermal shadow simulation. In addition, novel concepts to introduce the three-dimensional spatial and spectral variability required are under consideration. It is essential that the fidelity of the imagery generated is evaluated, to ensure that it is 'fit for purpose'. Therefore a toolset, FIRE, has been developed. This toolset can assess metrics such as 'clutter level' within the image. A range of validation studies have been undertaken throughout the development of CAMEO-SIM. This paper will give an overview of the current capabilities of CAMEO-SIM and describe planned developments. The validation work will be reviewed, especially the recent work on thermal modelling and analysis using FIRE.