The invention relates to the field of
infrared image processing, in particular to an
infrared blind pixel detection method based on temperature self-adaption and time-
frequency domain synthesis, which comprises the following steps of: traversing an
infrared image by using a sliding window to obtain gray values of pixel points around a current pixel point; carrying out
image edge judgment by using a Sobel-Otsu
algorithm based on
working temperature dynamic adjustment, and reserving a non-
image edge window to participate in blind pixel judgment; grouping pixel points in the window according to
horizontal and vertical directions; calculating the alpha filtering value of the gray scale of each group of pixels; calculating the deviation between the gray value of each pixel in the window and the alpha filtering value of the corresponding row coordinate and column coordinate group; if the deviation is greater than an adaptive threshold, setting the blind pixel as a potential blind pixel, and constructing a potential blind pixel
distribution matrix; a
time domain accumulation method for pre-screening periodic
noise based on FFT is adopted, periodic
noise interference is eliminated through
frequency domain analysis, and then high-probability blind elements are screened through
time domain accumulation; and obtaining a final blind pixel detection result. The method can effectively cope with the
working temperature change of the sensor and the
noise interference in a complex environment, and remarkably improves the accuracy and anti-interference capability of blind pixel detection.