1. A method for characterizing a source of electromagnetic or ionizing radiation having a criterion j, the method comprising: impinging the electromagnetic or ionizing radiation onto a detector having at least two polarization electrodes, including an anode and a cathode; generating electrical signals based on said impinging under effect of an interaction of said radiation in said detector, each interaction being characterized by a set of n parameters i=(x 1. .. x n ) on the basis of measurements of said electric signals; using a processor to: determine an n dimensions measurements histogram X, said measurements histogram X comprising terms X(i), the value of each term X(i) corresponding to the number of detected interactions with a set of parameters i, for each term X(i) of coordinates i within said measurements histogram X, determine an acceptance probability P(S j /X i ), indicating the probability of a source meeting said criterion j when an interaction with parameters i is detected, and convert said measurements histogram X to a corrected histogram by using said each acceptance probability P(S j /X i ) as weighting factors with respect to each term X(i) of said measurements histogram X; and generating an image characterizing said source based on the corrected histogram; wherein said acceptance probability P(S j /X i ) is calculated during a calibration phase, said calibration phase including: the acquisition of a first calibration histogram P(X/S j ), said first calibration histogram recording interactions measured as the detector is irradiated with a calibration source S, said calibration source meeting criterion j, the acquisition of a second calibration histogram P(X), said second calibration histogram recording interactions measured as the detector is irradiated with a calibration source S meeting the criterion j with a probability P(S), wherein the calibration phase includes moving the calibration source in front of the detector for obtaining one of the calibration histograms, and/or interposing an intermediate medium between the calibration source and the detector for obtaining one of the calibration histograms, and wherein said acceptance probability P(S j /X i ) being derived from said first calibration histogram P(X/S j ) and said second calibration histogram P(X) considering the values P(X i /S j ) and P(X i ) of each first and second histogram at coordinates i.