Artículos

 

Chromatic Correction Applied to Outdoor Images

 

Corrección cromática aplicada a imágenes de exteriores

 

Hayde Peregrina–Barreto¹, J. Gabriel Aviña–Cervantes¹, Iván R. Terol–Villalobos², José J. Rangel–Magdaleno¹, and Ana M. Herrera–Navarro³

 

¹ Universidad de Guanajuato, Guanajuato, Mexico. Correo: hperegrina@ieee.org, avina@ugto.mx, jjrangel@ieee.org

² Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Querétaro, Mexico. Correo: famter@ciateq.net.mx.

³ Universidad Autónoma de Querétaro, Querétaro, Mexico. Correo: anaherreranavarro@gmail.com.

 

Article received on 10/03/2010.
Accepted on 17/12/2010.

 

Abstract

The color of an image may be affected by many factors such as illumination, complex and multi–spectral reflections, and even the acquisition device. Especially in outdoor scenes, these conditions cannot be controlled. In order to use the information of an image, the latter must present the information as closer as possible to the original scene. Sometimes images are affected by a dominant color (cast) that changes its chromatic information. In order to avoid this effect, a color correction must be done. In this work, a novel method for correcting the color of outdoor images is proposed. This method consists in a complete improvement process of three steps: cast detection, color correction, and color improvement.

Keywords: Cast detection, color correction, chromatic adaptation, natural outdoor images, color enhancement.

 

Resumen

El color de una imagen puede ser alterado por muchos factores como iluminación, reflexiones complejas y multi–espectrales e incluso por el dispositivo de adquisición, especialmente en escenas en exteriores estas condiciones no pueden ser controladas. Con el fin de utilizar la información de una imagen, esta debe presentarse lo más cercano posible a la escena original. Algunas veces, las imágenes se ven afectadas por un color dominante (cast) que altera su información cromática. Para eliminar este efecto, se debe realizar una corrección de color. En este trabajo se presenta un novedoso método para corregir imágenes de exteriores. Este método consiste en un proceso de mejora completo de tres pasos: detección de matiz, corrección de color y mejora de color.

Palabras clave: Detección de matiz, corrección de color, adaptación cromática, imágenes naturales de exteriores, realce de color.

 

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