Image and Data Analysis Techniques

This chapter describes image and data analysis techniques for PSP and TSP. For quantitative measurements, cameras should be calibrated to establish the accurate relationship between the image plane and the 3D object space (Euclidean space) and then map data in images onto a surface grid in the object space. Analytical camera calibration techniques, especially the Direct Linear Transformation (DLT) and an optimization calibration method, are discussed. For PSP and TSP measurements, an ideal camera should have a linear response to the luminescent radiance. A simple effective technique is described to determine the radiometric response function of a camera. The self-illumination of PSP and TSP may cause a significant error near a conjuncture of surfaces when a strong exchange of the radiative energy occurs between neighboring surfaces. The numerical methods for correcting the self-illumination are described and the errors associated with the self-illumination are estimated.

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