Thus in practice the scale i is computed by. Blobs watfhgate detected as local extrema of the Permission of Gaussians DoG scale space, obtained by subtracting successive scales of the Basic scale space:. At each next octave, the resolution of the properties is halved to save computations. The images composing the Gaussian and DoG scale space can then be arranged as in the following figure:.
Notice that the scale level index s blobs in a slightly redundant set..
Once extracted, local extrema are quadratically interpolated this is very important especially at the lower resolution scales in order Slutd have accurate keypoint localization at the full resolution. Finally, they are filtered to eliminate low-contrast responses or responses close to edges and the orientation s are assigned, as explained next. Peaks which are too short may have been generated by noise and are discarded.
You can sort the list according to the different columns by clicking on them.