Removing periodic noise from image using Fourier transform
Just eyeballing the first image tells me that you have a very simple band pattern. They're in fact mostly horizontal (in the spatial domain). You see a clear cross in the Fourier domain. That's because most of your spatial features in that hallway are oriented horizontally and vertically. Your horizontal band similarly show up as a pair of dots above and below the origin. The bands are slightly rotated to the right, and so will the pair of dots.

You'll need to erase a very small area around these dots. But how to locate them? The easiest solution may be to take your recorded image, open it in Paint or a similar program, and paint pure black and white bars over the actual bands. Now take the FFT of this bar pattern, and you get the exact location of the two points you're looking for. It in general won't be exactly a single FFT bin, so you could fit a gaussian curve to the neighborhood of those two points, and use the opposite 1-gauss(x-xc,y-yc) as the frequency domain filter.