Image Processing Toolbox

Step 8: Extract Features from Label Matrix

Features can be extracted from the label matrix with the regionprops function. For example, we can calculate two measurements (area and orientation) and view them as a function of one another.

• stats = regionprops(wat, 'Area', 'Orientation');
  area = [stats.Area];
  orient = [stats.Orientation];
  figure, plot(area, orient, 'b*');
  title('Relationship of Particle Orientation to Area');
  xlabel('particle area (pixels)');
  ylabel('particle orientation (degrees)');
  
  
  

Step 7: Watershed Segmentation

Objects, Regions, and Feature Measurement