RSpec has an advanced feature for processing your spectral image captures, you can split the spectral video into individual BMP frames, then it lets you pick which frames you want to keep and makes a new video from those new frames.

The results are a much cleaner and more precise spectral image as I will show you with my absorption scan of Holmium oxide below.

This is the raw data from RSpec showing the calibrated absorption peaks after processing 46 frames out of a total of 68. 

The plot above shows both an original image capture with frame processing and the 2nd scan with frame processing, the difference is very clear and a lot more information can be squeezed out of your data.

I wanted to include this 3rd plot because I used my polarizing lens, opened @ 90%

Before dividing the sample by the reference