qFiltered
DDR ¼
qUnfiltered
Experimental results illustrating the relative dynamic range improvement obtained on using the solar filter are presented in Figs. 6–8. The data was captured on an overcast day with a measured ambient light level of 4000 lux and an S9227-03 exposure time of 0.25 ms. The PDU, mounted on a static holding frame, captured reflectance levels from a uniform green test card placed 950 mm