1. A method of correcting, in a camera with a detector and opto-mechanical scanning, faults in the digital image of even- and odd-parity frames where the frames contain fixed points of the image arranged in lines and represented by digital values obtained by converting analog values output by the detector, comprising the steps of: aiming the camera at a scene; destructuring the image of the scene, for a given lapse of time, by making inconsistent changes to the camera settings including modifying the focus of the camera and modifying a direction of the camera line of sight; acquiring, during the given lapse of time when the image of the scene is destructed, m, where m is a positive integer, frames with a same parity to calculate a mean frame in which each point within the mean frame has approximately the mean value of the digital values of corresponding points in the m frame; memorizing a correction frame in which the value of each point corresponds to the value of corresponding points in the mean frame to within a given constant value; adjusting the camera settings to correctly observe the scene; and subtracting, for each point in the correctly observed scene, the memorized value of the corresponding point from the correction frame.