Active millimeter-wave imaging systems for concealed object detection offer the possibility of much higher image contrast than passive systems, especially in indoor applications. By studying active millimeter-wave images of different test objects derived in the W band, we show that multispectral illumination is critical to the detectability of targets. We also propose to use image change detection techniques, including image differencing, normalized difference vegetation index, and principle component analysis to process the multispectral millimeter-wave images. The results demonstrate that multispectral illumination can significantly reveal the object features hidden by image artifacts and improve the appearance of the objects.
Original languageEnglish
Pages (from-to)6357-6365
Number of pages9
JournalApplied Optics
Issue number34
Publication statusPublished - 1 Dec 2008

    Research areas

  • millimeter wave imaging, multispectral imaging

ID: 1732339