Browsing NTNU Open by Author "Deborah, Hilda"
Now showing items 1-20 of 23
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Application of spectral statistics to surface defect detection
Deborah, Hilda; Richard, Noel; Hardeberg, Jon Yngve (Journal article; Peer reviewed, 2019)The development of a spectral difference-based statistical processing of hyperspectral images is provided in this article. Kullback-Leibler pseudo-divergence function, which was specifically developed for the metrological ... -
Assessment Protocols and Comparison of Ordering Relations for Spectral Image Processing
Deborah, Hilda; Richard, Noël; Hardeberg, Jon Yngve; Fernandez Maloigne, Christine (Journal article; Peer reviewed, 2018)Recent developments in hyperspectral sensors allow us to obtain high spectral and spatial resolutions that are close to the optical and physical structures of acquired surfaces. Consequently, hyperspectral imaging is used ... -
Creating RGB Images from Hyperspectral Images Using a Color Matching Function
Magnusson, Magnus; Sigurdsson, Jakob; Armansson, Sveinn Eirikur; Ülfarsson, Magnús Ö; Deborah, Hilda; Sveinsson, Johannes R. (Peer reviewed; Journal article, 2021)Hyperspectral images (HSI) are composed of hundreds of spectral bands, covering a broad range of the electromagnetic spectrum. However, images can only be visualized using three spectral channels for red, green, and blue ... -
Estimating the Color Palette of Ortelius' Atlas: A case study of hyperspectral imaging for rapid pigment screening
Deborah, Hilda; Palandri, Chiara; Oretti, Giulia (Journal article; Peer reviewed, 2023)The map collection, Kartsenteret, of the National Library of Norway is conducting a pilot study of its collection of approximately 150,000 maps. This collection covers a 500-year map and color history. Aiming to study the ... -
Evaluation of Text Legibility in Alternative Imaging Approaches to Microfiche Digitization
Deborah, Hilda; Mandal, Dipendra Jee (Peer reviewed; Journal article, 2021)Microfiche was a common format used in microforms reproductions of documents, extensively used for archival storage before the move to digital formats. While contemporary documents are still available for digitization, ... -
Evaluation of the Quality Indicators in Dehazed Images: Color, Contrast, Naturalness, and Visual Pleasingness
Rahadianti, Laksmita; Azizah, Aruni Yasmin; Deborah, Hilda (Peer reviewed; Journal article, 2021)Hazy images suffer from low quality due to blurring, veiling effects, and low contrast. To improve their visibility, dehazing methods attempt to restore them to their corresponding clear scenes, often by focusing more on ... -
An Experiment-based Comparative Analysis of Pigment Classification Algorithms using Hyperspectral Imaging
Mandal, Dipendra Jee; Pedersen, Marius; George, Sony; Deborah, Hilda; Boust, Clotilde (Peer reviewed; Journal article, 2023) -
Extrusion Planner
Søvik, Emma Sofie; Trøan, Jesper; Tveiten, Kristian; Tuv, Nils Olav (Bachelor thesis, 2021)Teknologi er i konstant endring, og det er viktig for selskapene å holde seg oppdatert på disse endringene for å rykke videre i bransjen. Spesielt moderne programvare forbedres raskt, og det er viktig å oppgradere gammel ... -
Fully Constrained Least Squares Linear Spectral Unmixing of The Scream (Verso, 1893)
Deborah, Hilda; Ulfarsson, Magnus Orn; Sigurdsson, Jakob (Peer reviewed; Journal article, 2021)Taking insights from the remote sensing field, in the recent decade, the advantages of hyperspectral imaging technology has been exploited for painting conservation. The estimation of pigment proportion in painting is a ... -
Hyperspectral Imaging Analyses of Cleaning Tests on Edvard Munch's Monumental Aula Paintings
Cutajar, Jan Dariusz; Babini, Agnese; Deborah, Hilda; Hardeberg, Jon Yngve; Joseph, Edith; Frøysaker, Tine (Peer reviewed; Journal article, 2022)The development of innovative applications of imaging technologies for monitoring change in cultural heritage objects is central to the CHANGE-ITN project. Within this framework, the authors’ ongoing work targets the ... -
Hyperspectral Pigment Dataset
Deborah, Hilda (Peer reviewed; Journal article, 2022)Hyperspectral imaging has the potential of delivering highly accurate results due to its high spatial and spectral resolutions. However, to ensure relevant and highly accurate end results, the processing steps need to go ... -
Ink bleed-through removal of historical manuscripts based on hyperspectral imaging
Rocha, Cristian da Costa; Deborah, Hilda; Hardeberg, Jon Yngve (Journal article; Peer reviewed, 2018)Old manuscripts can be degraded by different reasons over time. The ink bleed-through from the back side of the page is a common problem which compromises the readability and the aesthetics of the document. Unsupervised ... -
Measurement pipeline for accurate in-situ measurements of museum artwork using hyperspectral imaging
Mangi, Sanam Nisar (Master thesis, 2022)Conservators and researchers recognized the need to study and digitally document the colored artwork that makes up our cultural heritage. These digital documents are then utilised for various applications of preservations, ... -
A metrological spectral difference space for the statistical modelling of hyperspectral images
Deborah, Hilda; Richard, Noël; Ülfarsson, Magnús Ö; Benediktsson, Jón Atli; Hardeberg, Jon Yngve (Chapter, 2019)Answering to metrological constraints typically required in the context of industrial and medical applications, a spectral difference space is introduced in this work. In this space, an acquired hyperspectral data is treated ... -
Morphological Texture Description For Hyperspectral Images: Pattern Spectrum
Deborah, Hilda; Richard, Noël (Peer reviewed; Journal article, 2021)A metrological extension of morphological granulometry for the hyperspectral domain is introduced in this work. This development is enabled by the latest study of a suitable ordering relation for hyperspectral images. With ... -
Museum Visitor Experiences Based on Hyperspectral Image Data
Löchtefeld, Markus; Papachristos, Eleftherios; Deborah, Hilda (Chapter, 2023) -
Spectral Imaging of Ink Behind Glass: A Preliminary Investigation of the Colorimetric Shift
Deborah, Hilda; Marketou, Ariadne Kostomitsopoulou (Journal article, 2023)Transparent glass frames are often used to exhibit, handle, and store ancient manuscripts (folia or fragments) across museums, libraries, and collections. Once the manuscripts are carefully sealed (glazed), the process of ... -
Spectral-divergence based pigment discrimination and mapping: A case study on The Scream (1893) by Edvard Munch
Deborah, Hilda; George, Sony; Hardeberg, Jon Yngve (Journal article; Peer reviewed, 2019)An important application of imaging spectroscopy or hyperspectral imaging is the classification or discrimination of pigments based on the obtained spectral reflectance information. As opposed to being a point-analysis ... -
Subjective Quality Evaluation of Alternative Imaging Techniques for Microfiche Digitization
Mandal, Dipendra Jee; Deborah, Hilda; Pedersen, Marius (Journal article; Peer reviewed, 2023)Before the advent of digital formats, microfiche, a type of microform, was widely utilized for archiving and preserving historical documents. As a result, numerous historical collections and documents can only be found in ... -
Texture Stationarity Evaluation with Local Wavelet Spectrum
Conni, Michele; Deborah, Hilda (Chapter, 2020)In texture analysis, stationarity is a fundamental property. There are various ways to evaluate if a texture image is stationary or not. One of the most recent and effective of these is a standard test based on non-decimated ...