Methods for edge enhancement in color images based on derivative operations

Jorge L. Flores; José A. Ferrari; Ariel Fernández; Julia R. Alonso; Gastón A. Ayubi; J. Matías Di Martino

doi:10.1117/12.935618

24 October 2012 Methods for edge enhancement in color images based on derivative operations

Jorge L. Flores, José A. Ferrari, Ariel Fernández, Julia R. Alonso, Gastón A. Ayubi, J. Matías Di Martino

Proceedings Volume 8511, Infrared Remote Sensing and Instrumentation XX; 851115 (2012) https://doi.org/10.1117/12.935618
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

We present optical methods for edge enhancement in color images using optical derivative operations (first order derivative and Laplacian operator). The proposed methods is based on the polarization properties of liquid-crystal displays (LCD) and on the capacity of digital micro mirror devices to generate a (positive) copy of the digital image used as input, and simultaneously a complementary color replica of it. In the proposed optical setup the negative and positive replicas are at the same time imagined across a plane. First we analyzed the case when the negative replica has a lateral differential displacement relative to the original one; an image with enhanced first derivatives along a specific direction is obtained. In the case when the negative replica is low-pass filtered, one obtains the Laplacian of the original image. Unlike Fourier, our proposal works with incoherent illumination and does not require precise alignment, and thus, it could be a useful tool for edge extraction/enhancement in large images in real-time applications. Validation experiments are presented.

Citation Download Citation

Jorge L. Flores, José A. Ferrari, Ariel Fernández, Julia R. Alonso, Gastón A. Ayubi, and J. Matías Di Martino "Methods for edge enhancement in color images based on derivative operations", Proc. SPIE 8511, Infrared Remote Sensing and Instrumentation XX, 851115 (24 October 2012); https://doi.org/10.1117/12.935618

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available