1,721,000 research outputs found
Gamut Mapping With Blended Scaling and Clamping
No full textA colour processor for mapping an image from source to destination colour gamuts includes an input for receiving a source image having a plurality of source colour points expressed according to the source gamut; a colour characterizer configured to, for each source colour point in the source image, determine a position of intersection of a curve with the boundary of the destination gamut; and a gamut mapper configured to, for each source colour point in the source image: if the source colour point lies inside the destination gamut, apply a first translation factor to translate the source colour point to a destination colour point within a first range of values; or if the source colour point lies outside the destination gamut, apply a second translation factor, different than the first translation factor, to translate the source colour point to a destination colour point within a second range of value
Method and apparatus for removing visible artefacts in video images
No full textA method and apparatus are provided for removing regularly occurring visible artefacts in decompressed video images. Firstly a decompressed video signal is received. This is filtered frame by frame to extract data related to the artefacts. The thus extracted data is then processed in a neural network processor which has been trained to identify the artefacts in order to produce data identifying their locations. The video signal is then corrected to reduce the effect of the thus identified artefacts
De-interlacing of video data
No full textA method and apparatus are provided for converting an interlaced video signal to a non-interlaced video signal. For each pixel in each missing line of a video field in a video signal, correlation data is derived for each of a set of possible interpolations to be used in reconstructing pixels in each missing line (12). A correlation is selected (14) corresponding to the interpolation scheme likely to give the best result for a missing pixel, and an interpolation scheme selected (16) in dependence on the selected correlation. The pixel in the missing line is then interpolated (18). The step of deriving correlation data uses both the field containing the missing line and adjacent fields
Conversion of video data from interlaced to non-interlaced format
No full textA method and apparatus are provided for converting an interlaced video signal to a progressive scan signal. For each pixel in each missing line of a video field in a video signal to be converted correlation data is derived for each of a set of possible interpolations between adjacent pixels to be used in reconstructing a missing pixel. A confidence measure is derived from the correlation data (28) and adjustment data for correlation data is selected (30). The correlation data is then adjusted with the adjustment data (34) and on the resultant data a determination is made (34) as to which interpolation scheme is most likely to produce an accurate missing pixel. The missing pixel is then interpolated (38) using the selected interpolation scheme
De-interlacing of video data
No full textA method for converting an interlaced video signal to a non-interlaced video signal, comprising, for each pixel in each missing line of a video field in the interlaced video signal: deriving a correlation data set comprising correlation data for each of a plurality of possible interpolation schemes to be used in reconstructing the pixel; dividing each correlation data set into a plurality of correlation data zones; selecting an interpolation scheme from each correlation data zone; reconstructing the pixel using a blend of the selected interpolation schemes, wherein the blend for each pixel subsequent to a first pixel is determined based on the result of a comparison between the selected interpolation schemes and based on the blend used for a preceding pixel
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Sentir-pensando. Liana Borghi: una bio-bibliografia in fieri
No full textRicostruzione cronologica della produzione teorica e dell'attivismo politico di Liana Borghi, dal 1976 al 2021
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