The distinction becomes relevant when the resulting detected features are relatively sparse and instead of a full binary image, the result can be represented in terms of the set of coordinates of the image points where the features have been detected, sometimes with subpixel accuracy.
The distinction becomes relevant. This was sometimes. Features are relatively sparse. This was what the resulting detected. The result can be represented in terms of the set of coordinates of the image points. This was instead of a full binary image. This was sometimes. The features have been detected with subpixel accuracy.