Method for correcting images produced by an array of bolometers of a detector without temperature regulation, said array comprising a retina of bolometric membranes arranged in the focal plane of an optics and suspended above a substrate in which there is formed a readout circuit capable of outputting a stream of raw signal values that correspond to each bolometer in the array in relation to an observed scene, with the detector also comprising a shutter arranged between the optics and the retina? and the method involving, in an operating mode in which the ambient temperature conditions of the detector are free to change: ▪ a first step of closing the shutter and acquiring and storing in a memory of the detector: ∘ a current table of raw values corresponding to an image of the shutter by the array of bolometers; and ∘ a temperature of the detector during acquisition of said current raw value table, ▪ a second step of determining and storing, in the memory of the detector, an offset correction table for the current temperature of the detector as a function of: ∘ the current raw value table and the temperature associated thereof; and ∘ a current set of raw value tables (84 1, 84 2, 84 3, 84 M) corresponding to images of the shutter by the array of bolometers previously stored in the detector's memory and temperatures of the detector associated respectively with each of these tables (84 1, 84 2, 84 3, 84 M) at the time they were acquired, said temperatures being stored in the detector's memory; and ▪ a third step of correcting the stream of raw values by means of the offset correction table, characterised in that it involves, subsequent to the acquisition of a current raw value table, a maintenance process for maintaining of the current set of raw value tables (84 1, 84 2, 84 3, 84 M) comprising: ▪ testing a condition for replacing a table of said current set (84 1, 84 2, 84 3, 84 M) with the current raw value table; and ▪ if said condition is met, replacing the table of said current set of tables (84 1, 84 2, 84 3, 84 M) with the current raw value table and replacing the acquisition temperature of the replaced table with the acquisition temperature of the current raw values table, said test involving the determination, on the basis of at least one predetermined criterion, of whether there is a new set of tables obtained by replacing a table from the current set (84 1, 84 2, 84 3, 84 M) with the current table that is more relevant than the current set with regard to subsequent determination of the offset table. ▪ a first step of closing the shutter and acquiring and storing in a memory of the detector: ∘ a current table of raw values corresponding to an image of the shutter by the array of bolometers; and ∘ a temperature of the detector during acquisition of said current raw value table, ∘ a current table of raw values corresponding to an image of the shutter by the array of bolometers; and ∘ a temperature of the detector during acquisition of said current raw value table, ▪ a second step of determining and storing, in the memory of the detector, an offset correction table for the current temperature of the detector as a function of: ∘ the current raw value table and the temperature associated thereof; and ∘ a current set of raw value tables (84 1, 84 2, 84 3, 84 M) corresponding to images of the shutter by the array of bolometers previously stored in the detector's memory and temperatures of the detector associated respectively with each of these tables (84 1, 84 2, 84 3, 84 M) at the time they were acquired, said temperatures being stored in the detector's memory; and ∘ the current raw value table and the temperature associated thereof; and ∘ a current set of raw value tables (84 1, 84 2, 84 3, 84 M) corresponding to images of the shutter by the array of bolometers previously stored in the detector's memory and temperatures of the detector associated respectively with each of these tables (84 1, 84 2, 84 3, 84 M) at the time they were acquired, said temperatures being stored in the detector's memory; and ▪ a third step of correcting the stream of raw values by means of the offset correction table, characterised in that it involves, subsequent to the acquisition of a current raw value table, a maintenance process for maintaining of the current set of raw value tables (84 1, 84 2, 84 3, 84 M) comprising: ▪ testing a condition for replacing a table of said current set (84 1, 84 2, 84 3, 84 M) with the current raw value table; and ▪ if said condition is met, replacing the table of said current set of tables (84 1, 84 2, 84 3, 84 M) with the current raw value table and replacing the acquisition temperature of the replaced table with the acquisition temperature of the current raw values table, said test involving the determination, on the basis of at least one predetermined criterion, of whether there is a new set of tables obtained by replacing a table from the current set (84 1, 84 2, 84 3, 84 M) with the current table that is more relevant than the current set with regard to subsequent determination of the offset table.