Figure 4.

Four examples of original drawings (left) along with their segmented images (middle left) produced by the pre-trained model, Deep5, their corresponding velocity graphs (middle right), and the corresponding parameter values (right). The number of angles was evaluated from the number of peaks detected in the velocity graph: (a) The image is composed of two interlocking figures, both being pentagons where the number of angles for both figures was evaluated to be 5 ($p_{f1}$ and $p_{f2}$ were 100.00% and 90.71%, respectively, and both greater than 75%). (b) The image of two interlocking figures, but with only one being a pentagon (the left-side figure). The number of angles of the left-side figure was evaluated to be 5, as $p_{f1}$ was 91.5% and it was greater than 75%. For the right-side figure, the number of angles was given as 4, as the percentage $p_{f2}$ of 23.88% was less than 75% and the number of peaks detected in the velocity graph is 4. (c) The image of the right portion is a pentagon with the number of angles evaluated as 5 as $p_{f2}$ was 98.52% and it was greater than 75%. The image of the left portion was evaluated as a 4, as $p_{f1}$ was 29.10% and it was less than 75% and the number of peaks detected in the velocity graph is 4. (d) The image, composite of two figures, none of them being a pentagon. This is because the number of angles for each of the right and left-hand portions was evaluated to be a 4, since $p_{f1}$ and $p_{f2}$ were 18.18% and 0.00%, respectively, both being less than 75%. The numbers of angles in both the right and left portions were evaluated to be 4, matching the number of peaks detected in the velocity graphs for both.