A method for processing a raw image characterized by raw measurements Sp(i,j) that are associated with active bolometers Bpix_(i,j) of an imager, which bolometers are arranged in a matrix array, the imager being at an ambient temperature Tamb and furthermore comprising blind bolometers Bb_(k), the method, which is executed by a computer that is provided with a memory, comprising the following steps:
a) a step of calculating the electrical resistances RTc(i,j) and RTc(k), at the temperature Tamb, of the active and blind bolometers, respectively, from their respective electrical resistances RTr(i,j) and RTr(k) at a reference temperature Tr, said resistances being stored in the memory;
b) a step of determining the temperatures Tsc(i,j) actually measured by each of the active bolometers Bpix_(i,j) from the electrical resistances calculated in step a) and from the raw measurements Sp(i,j).