To perform the Acquisition of Samples

Acquiring Samples to analyze:

  • type in the Name of the Sample to be acquired;
  • click on Sampling Factor and select a value (from 1 to 10). The Sampling Factor (fa) defines the interval, in number of pixels, that the pixels in the image will be resampled. If fa=2 that means for every 2 lines and 2 columns (a 2 x 2 pixel region) one pixel will be used in the statistics calculations;
  • define the Acquisition mode: Cursor or Coordinates;
  • if Cursor: press the Zoom Cursor ( ) and click over some point in the image (upper left point), move the mouse to the right and below (as if performing a zoom), and click again (thus defining the lower right point) to define the area on the image from which you want to extract the sample;
  • if Coord. (Image Coordinates): type in the values for the Sample Coordinates (line, column). Position (0,0) corresponding to the upper left corner of the image:

    Start: X0 Y0, End : X1 Y1;

  • click on Acquire. Note that a rectangle shows the acquired sample.

The name of the sample define above will be presented in the Samples list. The sample coordinates will be used if the acquisition was done by the cursor. Repeat the procedures above to acquire any other samples.

To delete a sample:

  • select a sample in the Samples list;
  • click on the button Delete besides the list