Abstract: System and method for linearization of photometric response of an imaging sensor of a multi-camera flat panel X-Ray detector. The linearization includes acquiring by the imaging sensor, during a linearization phase, at least two images related to detectable radiation radiated by a scintillator in response to X-Ray radiation generated by an X-Ray source at a field of view of the imaging sensor, wherein the intensity of the X-Ray radiation generated by the X-Ray source is different for each of the images, measuring by a light energy measurement unit, substantially simultaneously with the acquiring of each of the images, at least two corresponding levels of energy of the detectable radiation, wherein the light energy measurement unit is substantially linear at the range of operation, and calculating an inverse response function to the imaging sensor based on the images and on the corresponding levels of energy.

Abstract: A system, device and a method to perform bilateral filtering using linear convolution by way of an FFT or a recursive sequence method. Proper selection of functions for the photometric and spatial components of a bilateral filter may reduce the computational cost of the bilateral filter while preserving the bilateral filter de-noising and edge detection capabilities. Such functions may reduce the computational cost of a bilateral filter to substantially O(1).