ROI histogram

nordicICE can display ROI data as ROI histograms; i.e. sorting the data in each ROI into multiple groups (bins) and plotting the number of pixels in the ROI belonging to a given bin.

• Main Menu: Measure->ROI->View->ROI Histogram Ctrl+H

By default, the data is sorted into 10 bins (i.e. 10 groups from the lowest to the highest pixel value in the ROI). The number of bins can be dynamically changed to any number as described in “ ROI Histogram options ”. As for the ROI Intensity curve, the current ROI can be frozen using the Hold Curve function. This will keep the current histogram for the ROI unaltered, and subsequent changes in the ROI will generate a new histogram next to the old one. The histogram can be displayed either as a bar chart of a line chart (see below). The histogram data can also be saved to the clipboard:

• ROI Histogram Menu: Edit->Copy Data

This command copies the histogram data as a ‘;’ delimited text file with two columns and number of rows equal to the number of bins set in the Number of bins option. The first column contains the mean pixel intensity for the bin and the second column contains the number of pixels in the bin.

• ROI Histogram Menu: Edit->Copy Figure

This copies the entire ROI Histogram figure to the clipboard.

The ROI Histogram window showing the histogram for a single ROI as a bar chart (left) or line chart (right)

Tips:

• You can paste the Histogram data into a text file in e.g. notepad, and save it as a .csv file for later use.

Related topics:

ROI Histogram options