Advances in spectral uplifting and reconstruction
| Název práce v češtině: | Pokroky ve spektrálním upliftingu a rekonstrukci |
|---|---|
| Název v anglickém jazyce: | Advances in spectral uplifting and reconstruction |
| Klíčová slova: | spektrálny uplifting|spektrální rendering |
| Klíčová slova anglicky: | spectral rendering|spectral uplifting|color science|image-based lighting |
| Akademický rok vypsání: | 2020/2021 |
| Typ práce: | disertační práce |
| Jazyk práce: | angličtina |
| Ústav: | Katedra softwaru a výuky informatiky (32-KSVI) |
| Vedoucí / školitel: | prof. Dr. techn. Alexander Wilkie |
| Řešitel: | skrytý - zadáno a potvrzeno stud. odd. |
| Datum přihlášení: | 01.09.2021 |
| Datum zadání: | 01.09.2021 |
| Datum potvrzení stud. oddělením: | 25.11.2021 |
| Datum a čas obhajoby: | 05.09.2025 14:00 |
| Datum odevzdání elektronické podoby: | 22.06.2025 |
| Datum odevzdání tištěné podoby: | 23.06.2025 |
| Datum proběhlé obhajoby: | 05.09.2025 |
| Oponenti: | Johannes Schudeiske |
| Laurent Belcour, Ph.D. | |
| Zásady pro vypracování |
| For the purposes of utilizing RGB-based assets in a spectral renderer, accurate conversion of RGB values to their spectral variants is a desired feature. This process is called spectral uplifting (or spectral upsampling) and although multiple methods capable of it have already been proposed, it is still not possible to synthesize spectra by example — that is, to uplift RGB values to spectra that match measurements from real surfaces. Such a process would allow artists to perform asset modeling in color space, while yielding consistent and physically plausible spectra for the input RGB values.
As a followup to this algorithm, another goal of this dissertation is to develop a framework suitable for an artist without prior knowledge about spectral information to craft reflectance and transmission spectra. This framework would give the artist a closer control of the spectral domain, which would allow a finer control of the scene appearance, including the utilization of spectral textures, under specific lighting conditions. This would also allow creation of metamers for specific illuminants. Due to its possibility to synthesize spectra by example, the framework would additionally offer the option of working with specific material classes – for example, if the artist were to paint a metal texture, suitable spectra of real metal surfaces would be selected for the uplifting process. |
| Seznam odborné literatury |
| Wenzel Jakob and Johannes Hanika
A Low-Dimensional Function Space for Efficient Spectral Upsampling Comput. Graph. Forum, 38(2), pp. 147-155, 2019. Alisa Jung and Alexander Wilkie and Johannes Hanika and Wenzel Jakob and Carsten Dachsbacher Wide Gamut Spectral Upsampling with Fluorescence Comput. Graph. Forum, 38(4), pp. 87-96, 2019. |