000 | 04473nam a22005175i 4500 | ||
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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 |
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024 | 7 |
_a10.1007/978-3-031-02241-8 _2doi |
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050 | 4 | _aT1-995 | |
072 | 7 |
_aTBC _2bicssc |
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072 | 7 |
_aTEC000000 _2bisacsh |
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072 | 7 |
_aTBC _2thema |
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082 | 0 | 4 |
_a620 _223 |
100 | 1 |
_aZhang, Cha. _eauthor. _4aut _4http://id.loc.gov/vocabulary/relators/aut _987037 |
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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. |
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300 |
_aXCVIII, 6 p. _bonline resource. |
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336 |
_atext _btxt _2rdacontent |
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337 |
_acomputer _bc _2rdamedia |
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338 |
_aonline resource _bcr _2rdacarrier |
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_atext file _bPDF _2rda |
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490 | 1 |
_aSynthesis Lectures on Image, Video, and Multimedia Processing, _x1559-8144 |
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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 |
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650 | 0 |
_aElectrical engineering. _987040 |
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650 | 0 |
_aSignal processing. _94052 |
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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 |
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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 |