one strip or a matrix of detectors of the charge transfer type travelling over an observed zone in which a plurality of pixels are acquired which pixels are sampled in a staggered configuration the method being characterized in that the line pitch and the column pitch of said staggered sampling are such that the image spectrum is situated mainly in a zone of the fourier plane where the modulation transfer function is meaningful and where spectrum aliasing is limited application_number US 84990297 A description fig6 shows the acquisition processing performed by two linear strips b 11 and b 12 in one possible implementation of the invention the strips b 11 and b 12 are disposed in a manner similar to the strips b 1 and b 2 they are parallel and juxtaposed and they are offset in their own length direction through a fraction of a pixel e g half a pixel i e p 2 where p is the pitch of individual detectors within a single strip the sampling time for each of the strips b 11 and b 12 is selected to be equal to 1 fc where fc is the cutoff frequency corresponding to the modulation transfer function of the equipment in practice the sampling time 1 fc and the pitch p between detectors coincides the pixel matrix obtained in this way is shown in fig7 where pixels acquired from the strip b 11 are referenced x b11 and pixels acquired from the strip b 12 are referenced x b12 as can be seen in fig7 this provides two images corresponding to the conventional acquisition pitches of 1 fc and p but offset relative to each other.