Figure 2
From: Wide Field-of-View Fluorescence Imaging of Coral Reefs
Fluorescence camera comparison.
Fluorescence images of the same corals taken inside a black cloth shroud that eliminated ambient light taken with(a) an unmodified standard camera and (b) a modified camera that is used for FluorIS, with the same illumination and filters. (c) Y-axis indicates pixel value comparisons of the green and red channels along the horizontal blue lines marked in (a,b), with X-axis indicating pixel count. On average, the red channel signal was 20 times larger in the image taken with the modified camera, while the green signal was stronger by a factor of 1.4 (values averaged over the entire image). Both images were taken with the same strobes, filters, strobe geometry and camera settings (ISO 640, exposure time 1/200s, f#8) and image values were normalized to be between 0 and 1. The red values are almost negligible in the standard camera, but significant in the modified one.
