Imaging system and imaging method

Abstract

According to an aspect, there is provided an imaging system (1) for imaging of subjects. The imaging system (1) comprises: a spectral camera (2) configured to capture a spectral image of a subject (6) in a spectral capture period comprising a plurality of spectral time points, the spectral image comprising a plurality of spectral frames each captured at a wavelength of a plurality of wavelengths and each corresponding to a spectral time point of the plurality of spectral time points; a reference camera (3) configured to capture a reference image of the subject (6) in a reference capture period comprising a plurality of reference time points and corresponding to the spectral capture period, the reference image comprising a plurality of reference frames each corresponding to a reference time point of the plurality of reference time points and a spectral frame of the plurality of spectral frames; a calculation unit (4) configured to calculate a motion vector for each reference frame of a subset of the plurality of reference frames; and an alignment unit (5) configured to align the spectral frames with each other by applying each calculated motion vector to the spectral frame of the plurality of spectral frames to which it corresponds. According to other aspects, there is provided an imaging method for imaging of subjects and a computer program which, when executed on a computing device, carries out a method of imaging of subjects.

Description

technical field [0001] The technical field of the invention relates to imaging systems, eg multispectral and hyperspectral imaging systems, and imaging methods, computer programs and computer readable media. Background technique [0002] The general background of the invention is spectral imaging or spectral analysis. Spectral imaging, such as multispectral or hyperspectral imaging, provides a wealth of information that cannot be readily obtained from single or triple spectral channel (eg, RGB) imaging. The benefits of spectral imaging are even more pronounced when imaging more complex objects such as human skin. When imaging human skin, the detected backscattered light is modulated by several chromophores including hemoglobin, melanin, water, lipids, carotenoids, and bilirubin. [0003] Reflectance spectroscopy is the study of light as a function of wavelength. It finds many applications such as medical applications, material analysis and soil analysis. Reflectance spec...

AI Technical Summary

Problems solved by technology

Motion of the imaged object may mean that the series of frames will be misaligned, resulting in blurring and lower spatial contrast in the spectral image

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