Finds features in the given image

features = obj.find(img)
features = obj.find(img, rois)

Input

• img Source image.
• rois Regions of interest. A cell array of 4-element vectors {[x y w h], ...}

Output

• features Found features. Structure containing image keypoints and descriptors with the following fields:
  • img_idx
  • img_size
  • keypoints
  • descriptors