In optical image processing, selective edge enhancement is important when it is preferable to emphasize some edges of an object more than others. We propose a new method for selective edge enhancement of amplitude objects using the anisotropic vortex phase mask by introducing anisotropy in a conventional vortex mask with the help of the sine function. The anisotropy is capable of edge enhancement in the selective region and in the required direction by changing the power and offset angle, respectively, of the sine function.
© 2011 Optical Society of America
Original Manuscript: April 11, 2011
Revised Manuscript: July 22, 2011
Manuscript Accepted: July 28, 2011
Published: September 15, 2011
Manoj Kumar Sharma, Joby Joseph, and Paramasivam Senthilkumaran, "Selective edge enhancement using anisotropic vortex filter," Appl. Opt. 50, 5279-5286 (2011)