FIELD: data processing.
SUBSTANCE: invention relates to the field of digital image processing and concerns a method for compensating the geometric noise of infrared images from sensors with a vertical arrangement of photosensitive elements. Method consists in receiving the radiation flux and subtracting from the brightness array of pixels of the input image of the array compensated constant components of the signals from the photosensitive elements. Array of constant component signals from photosensitive elements is obtained as a result of recurrent averaging of the brightness of pixels in a set of frames. In each frame, the rows are randomly rearranged, the variance of the brightness gradient is estimated in the recurrently averaged frame in the row direction, and compared with its previous maximum value. If this value is exceeded, the recurrent averaged frame is recorded to the memory, divided into low-frequency and high-frequency components, the high-frequency component is stored in memory and subtracted from the current frame. If the value is not exceeded, the previously stored high-frequency component is subtracted from the current frame.
EFFECT: technical result consists in forming a calibration frame with uniform brightness, regardless of the brightness distribution of the observed scene.
1 cl, 10 dwg
