Currently, most image merger routines are judged on the enhanced appearance of the hybrid imagery that they create. Little or no quantitative analysis is given which represents a technique's ability to preserve the radiometry of the hybrid imagery. For this reason, a quantitative analysis of six multi-resolution, multitemporal, multi-sensor, multispectral image merger routines was performed. These techniques were designed to incorporate the high resolution spatial information of a panchromatic image with the spectral information of a low resolution multispectral image. The panchromatic imagery came from the French satellite Systeme Pour l'Observation de la Terre (SPOT) and the multispectral imagery came from the NASA Landsat Thematic Mapper (TM). This study served as a quantitative test of three commonly used merger techniques (intensity-hue-saturation (IHS) transformation method, principal component method, and high-pass filter technique) and three merger techniques developed by the Digital Image Processing and Remote Sensing (DIRS) laboratory at RIT (ratio method, extended regression method, and global regression method). These routines were judged on the basis of their radiometric integrity and their dependent and independent classification accuracies. Statistical analysis of these metrics showed that the DIRS global coefficient routine provided the best enhancements of the multispectral imagery for the scenes and testing metrics selected.

Library of Congress Subject Headings

Image processing; Remote sensing

Publication Date


Document Type


Department, Program, or Center

Chester F. Carlson Center for Imaging Science (COS)


Schott, John

Advisor/Committee Member

Salvaggio, Carl

Advisor/Committee Member

Fairchild, Mark


Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: TA1632 .B728 1990


RIT – Main Campus