Registration by dot-pattern of dual-array sensor

Abstract

This research aims to register luminescence images obtained in a pressure-sensitive paint (PSP) measurement by using PSP and temperature-sensitive paint (TSP) dots in the dual-array sensor as markers. This reduces measurement error caused by position difference between obtained images in a PSP measurement without any additional markers. In this research, pressure and temperature distributions caused by a jet impingement was measured the dual-array sensor. We detected geometric centers of each PSP and TSP dot, interpolated the dot images, and registered the interpolated PSP and TSP images by the projective transformation. Obtained pressure distribution by this method qualitatively well agreed with the distribution which was interpolated after calculating each pressure value at each dot position.