Welcome to the UPF Digital Repository

Browsing Departament de Tecnologies de la Informació i les Comunicacions by Author "Kane, David"

Browsing Departament de Tecnologies de la Informació i les Comunicacions by Author "Kane, David"

Sort by: Order: Results:

  • A tone mapping operator based on neural and psychophysical models of visual perception
    Cyriac, Praveen; Bertalmío, Marcelo; Kane, David; Vazquez-Corral, Javier (Society of Photo Optical Instrumentation Engineers (SPIE), 2015)
    High dynamic range imaging techniques involve capturing and storing real world radiance values that span many orders of magnitude. However, common display devices can usually reproduce intensity ranges only up to two to ...
  • Improved high dynamic range video coding with a nonlinearity based on natural image statistics
    Sugito, Yasuko; Cyriac, Praveen; Kane, David; Bertalmío, Marcelo (International Journal of Signal Processing Systems, 2017)
    High Dynamic Range (HDR) technologies support the capture and presentation of a wider range of luminance values than conventional systems. An important element of video processing is the transfer function which should ...
  • Is there a preference for linearity when viewing natural images?
    Kane, David; Bertalmío, Marcelo (Society of Photo Optical Instrumentation Engineers (SPIE), 2015)
    The system gamma of the imaging pipeline, defined as the product of the encoding and decoding gammas, is typically greater than one and is stronger for images viewed with a dark background (e.g. cinema) than those viewed ...
  • Local denoising based on curvature smoothing can visually outperform non-local methods on photographs with actual noise
    Ghimpeteanu, Gabriela; Kane, David; Batard, Thomas; Levine, Stacey; Bertalmío, Marcelo (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    We propose a fast, local denoising method where the Euclidean curvature of the noisy image is approximated in a regularizing manner and a clean image is reconstructed from this smoothed curvature. User preference tests ...
  • Natural image statistics as a function of dynamic range
    Grimaldi, Antoine Vincent; Kane, David; Bertalmío, Marcelo (2017)
    The human visual system (HVS) has evolved to cope with the natural world. Understanding the statistical regularities in the world can help us understanding the HVS and aid the design of image processing algorithms.
  • Optimized tone curve for in-camera image processing
    Cyriac, Praveen; Kane, David; Bertalmío, Marcelo (The Society for Imaging Science and Technology (IS&T), 2016)
    The sensor values captured by a digital camera are transformed in a non-linear manner prior to quantization in order to make the quantization rate approximately proportional to the sensitivity of the human visual system. ...
  • Perceptual dynamic range for in-camera image processing.
    Cyriac, Praveen; Kane, David; Bertalmío, Marcelo (The British Machine Vision Association (BMVA), 2015)
    Digital cameras apply a non-linearity to the captured sensor values prior to quantisation. This process is known as perceptual linearisation and ensures that the quantisation rate is approximately proportional to human ...
  • A reevaluation of Whittle (1986, 1992) reveals the link between detection thresholds, discrimination thresholds, and brightness perception
    Kane, David; Bertalmío, Marcelo (Association for Research in Vision and Ophthalmology (ARVO), 2019)
    In 1986, Paul Whittle investigated the ability to discriminate between the luminance of two small patches viewed upon a uniform background. In 1992, Paul Whittle asked subjects to manipulate the luminance of a number of ...
  • Statistics of natural images as a function of dynamic range
    Grimaldi, Antoine Vincent; Kane, David; Bertalmío, Marcelo (Association for Research in Vision and Ophthalmology (ARVO), 2019)
    The statistics of real world images have been extensively investigated, but in virtually all cases using only low dynamic range image databases. The few studies that have considered high dynamic range (HDR) images ...
  • System gamma as a function of image- and monitor-dynamic range
    Kane, David; Bertalmío, Marcelo (Association for Research in Vision and Ophthalmology (ARVO), 2016)
    System gamma is the end-to-end exponent that describes the relationship between the relative luminance values at capture and the reproduced image. The system gamma preferred by subjects is known to vary with the background ...
  • The influence of lightness, and the crispening effect on the perceived contrast of textured images
    Kane, David; Bertalmío, Marcelo (The Society for Imaging Science and Technology (IS&T), 2016)
    We investigate the role of lightness perception in determining the perceived contrast of images. In particular, it is known that the background luminance of a display affects the relationship between onscreen luminance and ...
  • The role of lightness perception in determining the perceived contrast of real world scenes
    Kane, David; Bertalmío, Marcelo (The Society for Imaging Science and Technology (IS&T), 2016)
    We investigate the impact of the background luminance upon the perceived image quality of real world scenes. To do so, we generate a set of small image patches that span the full range of mean luminance values and contrasts ...
  • Vision models fine-tuned by cinema professionals for High Dynamic Range imaging in movies
    Cyriac, Praveen; Canham, Trevor; Kane, David; Bertalmío, Marcelo (Springer, 2020)
    Many challenges that deal with processing of HDR material remain very much open for the film industry, whose extremely demanding quality standards are not met by existing automatic methods. Therefore, when dealing with HDR ...

Search DSpace


Advanced Search

Browse

My Account

Compliant to Partaking