The Method of Comparison of Seal and Outline Using Vector Data

7 February 2003 ) In this report, we propose a seal-identiˆcation method using photo-retouching software ( Adobe Photoshop ) . We devised a procedure by which one can create an outline of the image of a known seal by the ``path'' function and compare it by superimposing it over the image of the questioned seal. A Photoshop path expresses the range of an image with vector data. To examine the usefulness of this method, we evaluated the degree of precision in detecting an outline as well as the degree of distortion due to the rotation of the path, and then simulated a seal identiˆcation. The results showed that this method had a su‹cient degree of precision in iden-tifying seals. The method has two major advantages: faster and easier processing than the method by photograph and accuracy in reproducing the testing process