Interference radar unwrapping reference point automatic selection method and selection device

The invention relates to an interference radar unwrapping reference point automatic selection method and device, and the method comprises the steps: calculating the phase derivative variance of each interferogram, and carrying out the binarization of the phase derivative variance, and obtaining a plurality of binary phase derivative variance maps; setting a first sliding window in each binarized phase derivative variance map; selecting a stable region from the plurality of binarized phase derivative variance maps according to the proportion of stable pixels in each first window and the average coherence of the first pixels; setting a second sliding window in a stable area corresponding to the coherence coefficient graph; selecting a target window according to the second pixel average coherence, and obtaining a reference pixel in the target window and a value of the reference pixel; when it is judged that the value of the reference pixel meets the preset condition, the reference pixel serves as a phase unwrapp