Method for analysing an object, comprising the following steps: a) irradiating the object using a radiation source, said source emitting ionizing electromagnetic radiation that propagates to the object; b) obtaining a spectrum ( Sp i) of radiation transmitted by the object using a radiation detector (20 i) belonging to a detecting device, the obtained spectrum comprising a plurality of elementary channels (h), each elementary channel being associated with one energy band ( δE ( h)); c) based on the obtained spectrum ( Sp i), forming a binned spectrum ( Sp' i) made up of a plurality of channels (k), called binning channels, at least one binning channel being obtained by binning, according to a predetermined binning criterion, a plurality of elementary channels (h), the value of the binned spectrum ( Sp' i ( k)) in each binning channel (k) being dependent on the value of the spectrum ( Sp i ( h)) obtained in step b), in each elementary channel ( h) thus binned; d) selecting a basis ( B i K) comprising basis vectors ( V n K) each term ( V n K) of which represents an attenuation of the ionizing electromagnetic radiation in an energy range (Δ E ( k)) associated with each binning channel (k); e) obtaining coordinates ( α i, n) of an attenuation, corresponding to the binned spectrum (Sp') formed in step c), in the basis ( B i K) selected in step d); f) estimating a characteristic of the object depending on the coordinates ( α i, n) obtained in step e); the method being characterized in that the detecting device comprises a plurality of radiation detectors (20 i, 20 j) that are adjacent to one another, steps b) to e) being implemented for each radiation detector, such that: - each step c) is implemented considering the same binning criterion; - in step e), the attenuation corresponding to at least two binned spectra ( Sp ' i, Sp' j) obtained by two different detectors, respectively, is decomposed into the same number of coordinates in two different bases ( B i K, B j K); - in step f), a characteristic of the object is estimated based on the coordinates obtained in each step e). a) irradiating the object using a radiation source, said source emitting ionizing electromagnetic radiation that propagates to the object; b) obtaining a spectrum ( Sp i) of radiation transmitted by the object using a radiation detector (20 i) belonging to a detecting device, the obtained spectrum comprising a plurality of elementary channels (h), each elementary channel being associated with one energy band ( δE ( h)); c) based on the obtained spectrum ( Sp i), forming a binned spectrum ( Sp' i) made up of a plurality of channels (k), called binning channels, at least one binning channel being obtained by binning, according to a predetermined binning criterion, a plurality of elementary channels (h), the value of the binned spectrum ( Sp' i ( k)) in each binning channel (k) being dependent on the value of the spectrum ( Sp i ( h)) obtained in step b), in each elementary channel ( h) thus binned; d) selecting a basis ( B i K) comprising basis vectors ( V n K) each term ( V n K) of which represents an attenuation of the ionizing electromagnetic radiation in an energy range (Δ E ( k)) associated with each binning channel (k); e) obtaining coordinates ( α i, n) of an attenuation, corresponding to the binned spectrum (Sp') formed in step c), in the basis ( B i K) selected in step d); f) estimating a characteristic of the object depending on the coordinates ( α i, n) obtained in step e); - each step c) is implemented considering the same binning criterion; - in step e), the attenuation corresponding to at least two binned spectra ( Sp ' i, Sp' j) obtained by two different detectors, respectively, is decomposed into the same number of coordinates in two different bases ( B i K, B j K); - in step f), a characteristic of the object is estimated based on the coordinates obtained in each step e).