• Assetfront Repair 

      Bako, Abdi; Hamcho, Amr; Abdullah, Mustafa; Khumparov, Shamil Saidovitch (Bachelor thesis, 2021)
      Digitalisering er en viktig prosess for behandling, lagring og utveksling av data, ettersom den gjør det mulig å få tilgang til og overføre data effektivt. Som medfører til å forbedre effektiviteten og konsistensen. ...
    • Colourlab Image Database: Geometric Distortions 

      Pedersen, Marius; Amirshahi, Seyed Ali (Peer reviewed; Journal article, 2021)
      Over the years, a high number of different objective image quality metrics have been proposed. While some image quality metrics show a high correlation with subjective scores provided in different datasets, there still ...
    • Comparing the Chromatic Contrast Sensitivity in Vertical and Oblique Orientations 

      Amirshahi, Seyed Ali; Pedersen, Marius; Beghdadi, Azeddine (Journal article; Peer reviewed, 2019)
      While for many years achromatic contrast sensitivity has been widely studied by different research groups from various fields of work, the same attention has not been paid to chromatic contrast sensitivity. Due to the ...
    • A Critical Analysis on Perceptual Contrast and its Use in Visual Information Analysis and Processing 

      Beghdadi, Azeddine; Qureshi, Muhammad Ali; Amirshahi, Seyed Ali; Chetouani, Aladine; Pedersen, Marius (Peer reviewed; Journal article, 2020)
      Contrast in visible images is one of the most relevant characteristics of visual signals. Since the pioneering works performed in vision psychology and optics, different definitions have been proposed in the literature. ...
    • Do Contrast Measures Correlate? A Pilot Investigation 

      Amirshahi, Seyed Ali; Kadyrova, Altynay; Pedersen, Marius (Journal article, 2019)
    • Face Image Quality Assessment 

      Demloj, Walid; Grosberghaugen, Kjetil; Skattum, Julian Nyland; Taralrud, Hans Petter Fauchald (Bachelor thesis, 2021)
      Ytelsen på ansiktgjenkjenningssystmer er avhengig av kvaliteten på bildene for å kunne teste og trene disse systemene. For å automatisk vurdere kvaliteten på ansiktsbilder blir Face Image Quality Metrics (FIQMs) benyttet. ...
    • Future Directions in Image Quality 

      Amirshahi, Seyed Ali; Pedersen, Marius (Journal article; Peer reviewed, 2019)
      With the advancements made in the field of image processing and computer vision, the last few decades have seen an increase in studies focused on image quality assessment. While this has resulted in the introduction of ...
    • How Do Image Quality Metrics Perform on Contrast Enhanced Images? 

      Amirshahi, Seyed Ali; Kadyrova, Altynay; Pedersen, Marius (Journal article, 2019)
    • Image Quality Assessment by Comparing CNN Features between Images 

      Amirshahi, Seyed Ali; Pedersen, Marius; Yu, Stella X. (Peer reviewed; Journal article, 2016)
      Finding an objective image quality metric that matches the subjective quality has always been a challenging task. We propose a new full reference image quality metric based on features extracted from Convolutional Neural ...
    • Reviving Traditional Image Quality Metrics Using CNNs 

      Amirshahi, Seyed Ali; Pedersen, Marius; Beghdadi, Azeddine (Journal article; Peer reviewed, 2018)
      Objective Image Quality Metrics (IQMs) are introduced with the goal of modeling the perceptual quality scores given by observers to an image. In this study we use a pre-trained Convolutional Neural Network (CNN) model to ...
    • Towards a perceptual metric for video quality assessment 

      Amirshahi, Seyed Ali (Master thesis, 2010)
      In the last couple of years a huge amount of work has been shifted from works on Image Quality Assessment to Video Quality Assessment. Although some metrics have started to take the temporal aspects of videos into account ...