| 摘要 |
The change detection device (1) of the present invention inputs at least two SAR image sets (501) each holding at least information indicative of a reflection intensity and a phase so as to be associated with each of pixels corresponding to a resolution cell within a field of vision for image capturing including a specific region. The information is generated from observation data formed of four basic polarization pairs, i.e. HH, HV, VH and VV polarization pairs observed by a synthetic aperture radar at generally the same time. The change detection device (1) determines a polarization pair (502) whose reflection intensity is not less than a predetermined value or the highest with respect to each of target pixels by using at least one SAR image set among input SAR image sets, and measures displacement (503) at a spot corresponding to the target pixel based on a determined polarization pair and an input SAR image set. |
