Revista Facultad Nacional de Agronomía, Medellín
versão impressa ISSN 0304-2847
MEJIA OSPINA, Juan Camilo; PRIETO ORTIZ, Flavio Augusto e BRANCH BEDOYA, John Willian. ILLUMINATION CORRECTION FOR AERIAL AGRICULTURE IMAGES TAKEN AT LOW ALTITUDE. Rev.Fac.Nal.Agr.Medellín [online]. 2007, vol.60, n.2, pp. 4077-4104. ISSN 0304-2847.
A new method is presented in order to carry out the color corrections of aerial agriculture images taken at low altitude, in different dates, times and conditions of cloudiness. The method does not require scene targets or specific data in order to develop the correction of the actual illumination. It is based on the constancy of color technique called gamut mapping, which was adapted to take advantage of the own characteristics of the aerial images. For images captured under different conditions of illumination, the method allows its normalization for comparison purposes. It was applied to banana plantations, but it can be extended to any type of agriculture images, registered by aerial images at low altitude. It was proven and validated using synthetic images because of some difficulties found during the acquisition stage of real images.
Palavras-chave : Illumination correction; agricultural images; color constancy.