Êtes-vous un étudiant de l'EPFL à la recherche d'un projet de semestre?
Travaillez avec nous sur des projets en science des données et en visualisation, et déployez votre projet sous forme d'application sur GraphSearch.
Concept
Video post-processing
Résumé
The term post-processing (or postproc for short) is used in the video/film business for quality-improvement (specifically ) methods used in video playback devices, such as stand-alone DVD-Video players; video playing software; and transcoding software. It is also commonly used in real-time 3D rendering (such as in video games) to add additional effects.
Video post-processing is the process of changing the perceived quality of a video on playback (done after the decoding process). routines such as linear interpolation, bilinear interpolation, or cubic interpolation can for example be performed when increasing the size of images; this involves either subsampling (reducing or shrinking an image) or zooming (enlarging an image). This helps reduce or hide image artifacts and flaws in the original film material. It is important to understand that post-processing always involves a trade-off between speed, smoothness and sharpness.
and multivariate interpolation:
Nearest-neighbor interpolation
linear interpolation
bilinear interpolation
cubic interpolation
bicubic interpolation
Bézier surface
Lanczos resampling
trilinear interpolation
Tricubic interpolation
SPP (Statistical-Post-Processing)
Deblocking
Deringing
Sharpen / Unsharpen (often referred to as "soften")
Requantization
Luminance alterations
Blurring / denoising
Deinterlacing
weave deinterlace method
bob deinterlace method
linear deinterlace method
yadif deinterlace method
Deflicking
2:3 pull-down / ivtc (inverse telecine) for conversion from 24 frames/s and 23.976 frames/s to 30 frames/s and 29.97 frames/s
3:2 pull-up (telecine conversion) for conversion from 30 frames/s and 29.97 frames/s to 24 frames/s and 23.976 frames/s
Additionally, post-processing is commonly used in 3D rendering, especially for video games. Instead of rendering 3D objects directly to the display, the scene is first rendered to a buffer in the memory of the video card. Pixel shaders and optionally vertex shaders are then used to apply post-processing filters to the image buffer before displaying it to the screen.
Source officielle
À propos de ce résultat
Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.
Personnes associées (1)