We propose a wavelet domain diversity combining method to combat errors dur
ing image transmission on wireless channels, For images represented in the
wavelet domain, diversity is used to obtain multiple data streams correspon
ding to the transmitted image at the receiver, These individual image data
streams are combined to form a composite image with higher perceptual quali
ty, Both uncompressed and compressed images are considered. The SPIHT algor
ithm is used for image compression, Diversity combining methods for both un
compressed and compressed images exploit the characteristics of the wavelet
transform. For compressed images, unequal error protection is employed in
conjunction with diversity combining. Simulation results demonstrate that t
he quality of the received image can be significantly improved.