...A novel particle tracking method with individual particle size measurement and its application to ordering in glassy hard sphere colloids. Soft Matter 9, 1447–1457 (2013). https://dx.doi.org/10.1039/C2SM27107A (http://arxiv.org/pdf/1301.7237.pdf)
easy to use sepctrography software. allow to display spectrography curves, and to overlay severals curves. you can create firste or second derivatives from the curves, or place marks to identify peaks.
finals drawings can be saved as png or pdf files.