Change detection method for intensity VHF wavelength-resolution SAR images

• This paper presents the proposal of a new change detection method for intensity VHF wavelength-resolution images. High-Amplitude pixels are related to the presence of strong scatterers, resulting in high detection probability performance. However, the number of false alarms tends to be high too. In this initial study, difference images are considered to reduce the influence of the strong scatterers that are not related to targets, i.e., present in both surveillance and reference images. The proposed change detection method is based on a likelihood-ratio test, where the tested hypothesis is the bivariate exponential distribution. The derivation of the proposed likelihood test is presented. Finally, the proposed change detection method is assessed considering data measured with the CARABAS II VHF UWB SAR system. Preliminary results show that the proposed method is efficient in detecting positive changes. © 2021 SPIE.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

Nyckelord

CARABAS II

Change detection method

Intensity images

VHF UWB SAR

Synthetic aperture radar

CARABAS

Change detection

Detection methods

SAR Images

UWB SAR

Wavelength resolution

Radar imaging

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