In VSC/HS, the capability to analyze a document in a wide spectrum of light at one go is known as
Hyper spectral imaging
The VSC (Video Spectral Comparator) series by Foster + Freeman is used in questioned-document examination to view documents under different wavelengths of light (UV, visible, IR) to detect alterations, obliterations and different inks.
In VSC/HS models, ‘HS’ stands for hyperspectral. Hyperspectral imaging captures a full stack of images across a wide, continuous range of wavelengths in one go, so a spectrum is recorded for every pixel of the document.
This lets the examiner compare the spectral behaviour of inks over the whole area at once and separate inks that look identical in visible light.
Super-resolution imaging improves spatial detail, 3-D imaging records surface relief such as indentations, and optical imaging is a general term; none of these specifically means recording a document over a wide spectral range in one operation.
Hence, the answer is Hyper spectral imaging.
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