In this paper we present a perceptual distortion mea sure that predicts image integrity far better than mean squared error This perceptual distortion measure is based on a model of human visual processing that ts empirical measurements of the psychophysics of spatial pattern de tection The model of human visual processing proposed involves two major components a steerable pyramid trans form and...

We present a new technique to register an object model with an observed image. Our technique uses the model to establish an image-to-model correspondence and, therefore, to facilitate the registration process. The model guides and constrains the matching process in order to reduce the inherent complexity of the problem and to increase the robustness and eeciency of the solution. We begin by rou...

Subjects examined image pairs consisting of an original and a reproduction created using either JPEG compression or digital halftoning. Subjects marked locations on the reproduction that differed detectably from the original. We refer to the distribution of error marks by the subjects as image distortion maps. The empirically obtained image distortion maps are compared to the visible difference...

one of the problems in the ground-based circular synthetic aperture radar is the dependence of the azimuth resolution to the antenna rotation radius and operational limitation of increasing it. to enhance the image quality in azimuth, model-based image formation through three methods: matched filter, inverse filter and optimum filter is suggested and analyzed. for the purpose of comparison, thr...

This paper introduces an intermediate virtual representation, called ideal fisheye image, which obeys the ideal simple projection without camera distortion. By using a look-up-table from the ideal fisheye image to the input fisheye image with distortion, a view-direction-free perspective display can be generated fast in comparison with the method of solving a set of nonlinear equations of camer...