Dodging Research for Digital Aerial Images

Abstract

Analysis two main influences of orthophoto mosaic quality, one is geometric mosaic quality and another is the colour mosaic quality. The uneven lightness distribution inside aerial image and the colour differences between aerial images are two factors which lead the colour mosaic problems. Homomorphic filter can change the distribution of lightness inside image and Wallis transform can adjust the colour difference between images. Using low frequency convolution algorithm to eliminate seam lines in mosaic orthophoto. The finally result of DOM is showing that the dodging method mentioned in this paper is useful for solving the colour problems in orthophoto mosaic.