Peak Picking

Mnova ElViS implements a series of peak picking algorithms which can be accessed from the Processing Ribbon and from the Dynamic processing template:

From the ribbon, you will be allowed you to use Automatic, Manual (or Manual Threshold), Peak by Peak methods of Peak Picking, to Delete all peaks in visible range and to display the peaks table.

Automatic Peak Picking

The Automatic Peak Picking option sets labels all spectral peaks in accordance with the selected options. It can be launched by simply clicking on the 'Auto Peak Picking' icon on the toolbar.

Manual Threshold

The Manual Peak Picking allows the user to set an area of the spectrum where the software will carry out the Peak Picking, by simply left clicking and dragging the mouse over the area.

Peak by Peak

The Peak by Peak option will allow you to select peaks to be labeled (unlabeled) one by one by hovering the mouse over a peak of interest and clicking on it. The procedure is very simple: just point to the peak you want to pick so that it is highlighted and then left click on the mouse.  

To pick a peak at an arbitrary position (e.g. for a non-resolved peak), press <Shift> and click.

From the Dynamic Processing Template, you can select the 'peaks direction' (upwards, downwards or both), the algorithm sensitivity (to avoid picking the noise) and the maximum number of peaks.

Sensitivity: it is basically a kind of smoothing parameter. For example, in noisy spectra, large values of this parameter will smooth the spectrum in the background so that less peaks will be detected.

The ElViS Peaks table will be displayed just by clicking on this button of the ribbon