Mobile application for two-stage linear and nonlinear image processing

The article discusses the technology of correcting blurred type distortions on images recorded by mobile devices. The aim of the development is to provide high-quality distortion correction with minimal computational costs. We use two-stage technology. At the first stage, blind identification of linear filter parameters is performed. It is assumed that the frequency response of the filter has central symmetry and consists of segments of quadratic and exponential functions. At the second stage, parameters of nonlinear filter are determined. Both automatic and manual visual settings are provided. The program code for Android OS and the results of experiments showing the effectiveness of the developed application to eliminate distortions in images are presented.