000 04473nam a22005175i 4500
001 978-3-031-02241-8
003 DE-He213
005 20240730165014.0
007 cr nn 008mamaa
008 220601s2006 sz | s |||| 0|eng d
020 _a9783031022418
_9978-3-031-02241-8
024 7 _a10.1007/978-3-031-02241-8
_2doi
050 4 _aT1-995
072 7 _aTBC
_2bicssc
072 7 _aTEC000000
_2bisacsh
072 7 _aTBC
_2thema
082 0 4 _a620
_223
100 1 _aZhang, Cha.
_eauthor.
_4aut
_4http://id.loc.gov/vocabulary/relators/aut
_987037
245 1 0 _aLight Field Sampling
_h[electronic resource] /
_cby Cha Zhang, Tsuhan Chen.
250 _a1st ed. 2006.
264 1 _aCham :
_bSpringer International Publishing :
_bImprint: Springer,
_c2006.
300 _aXCVIII, 6 p.
_bonline resource.
336 _atext
_btxt
_2rdacontent
337 _acomputer
_bc
_2rdamedia
338 _aonline resource
_bcr
_2rdacarrier
347 _atext file
_bPDF
_2rda
490 1 _aSynthesis Lectures on Image, Video, and Multimedia Processing,
_x1559-8144
505 0 _aThe Light Field -- Light Field Spectral Analysis -- Light Field Uniform Sampling -- The Freeform Sampling Framework -- Light Field Active Sampling -- The Self-Reconfigurable Camera Array -- Conclusions and Future Work.
520 _aLight field is one of the most representative image-based rendering techniques that generate novel virtual views from images instead of 3D models. The light field capture and rendering process can be considered as a procedure of sampling the light rays in the space and interpolating those in novel views. As a result, light field can be studied as a high-dimensional signal sampling problem, which has attracted a lot of research interest and become a convergence point between computer graphics and signal processing, and even computer vision. This lecture focuses on answering two questions regarding light field sampling, namely how many images are needed for a light field, and if such number is limited, where we should capture them. The book can be divided into three parts. First, we give a complete analysis on uniform sampling of IBR data. By introducing the surface plenoptic function, we are able to analyze the Fourier spectrum of non-Lambertian and occluded scenes. Given the spectrum,we also apply the generalized sampling theorem on the IBR data, which results in better rendering quality than rectangular sampling for complex scenes. Such uniform sampling analysis provides general guidelines on how the images in IBR should be taken. For instance, it shows that non-Lambertian and occluded scenes often require a higher sampling rate. Next, we describe a very general sampling framework named freeform sampling. Freeform sampling handles three kinds of problems: sample reduction, minimum sampling rate to meet an error requirement, and minimization of reconstruction error given a fixed number of samples. When the to-be-reconstructed function values are unknown, freeform sampling becomes active sampling. Algorithms of active sampling are developed for light field and show better results than the traditional uniform sampling approach. Third, we present a self-reconfigurable camera array that we developed, which features a very efficient algorithm for real-time rendering andthe ability of automatically reconfiguring the cameras to improve the rendering quality. Both are based on active sampling. Our camera array is able to render dynamic scenes interactively at high quality. To the best of our knowledge, it is the first camera array that can reconfigure the camera positions automatically.
650 0 _aEngineering.
_99405
650 0 _aElectrical engineering.
_987040
650 0 _aSignal processing.
_94052
650 1 4 _aTechnology and Engineering.
_987043
650 2 4 _aElectrical and Electronic Engineering.
_987045
650 2 4 _aSignal, Speech and Image Processing.
_931566
700 1 _aChen, Tsuhan.
_eauthor.
_4aut
_4http://id.loc.gov/vocabulary/relators/aut
_987047
710 2 _aSpringerLink (Online service)
_987048
773 0 _tSpringer Nature eBook
776 0 8 _iPrinted edition:
_z9783031011139
776 0 8 _iPrinted edition:
_z9783031033698
830 0 _aSynthesis Lectures on Image, Video, and Multimedia Processing,
_x1559-8144
_987049
856 4 0 _uhttps://doi.org/10.1007/978-3-031-02241-8
912 _aZDB-2-SXSC
942 _cEBK
999 _c86042
_d86042