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July 15, 2021 07:12 pm GMT
AMD broadly detailed how FSR works in its June 2021 announcement of the technology. FSR sits within the render pipeline of a game, where an almost ready lower-resolution frame that's been rendered, tone-mapped, and anti-aliased, is processed by FSR in a two-pass process implemented as a shader, before the high-resolution output is passed on to post-processing effects that introduce noise (such as film-grain). HUD and other in-game text (such as subtitles), are natively rendered at the target (higher) resolution and applied post render. The FSR component makes two passesupscaling, and sharpening. We learn from the source code that the upscaler is based on the Lanczos algorithm, which was invented in 1979. Media PC enthusiasts will know Lanczos from MadVR, which has offered various movie upscaling algorithms in the past. AMD's implementation of Lanczos-2 is different than the originalit skips the expensive sin(), rcp() and sqrt() instructions and implements them in a faster way. AMD also added additional logic to avoid the ringing effects that are often observed on images processed with Lanczos.
Original Link: https://www.techpowerup.com/284585/amd-fidelityfx-source-code-released-updates-posted-uses-lanczos-under-the-hood
AMD FidelityFX Source Code Released & Updates Posted, Uses Lanczos under the Hood
AMD today in a blog post announced several updates to the FidelityFX Super Resolution (FSR) technology, its performance enhancement rivaling NVIDIA DLSS, which lets gamers dial up performance with minimal loss to image quality. To begin with, the company released the source code of the technology to the public under its GPUOpen initiative, under the MIT license. This makes it tremendously easy (and affordable) for game developers to implement the tech. Inspecting the source, we find that FSR relies heavily on a multi-pass Lanczos algorithm for image upscaling. Next up, we learn that close to two dozen games are already in the process of receiving FSR support. Lastly, it's announced that Unity and Unreal Engine support FSR.AMD broadly detailed how FSR works in its June 2021 announcement of the technology. FSR sits within the render pipeline of a game, where an almost ready lower-resolution frame that's been rendered, tone-mapped, and anti-aliased, is processed by FSR in a two-pass process implemented as a shader, before the high-resolution output is passed on to post-processing effects that introduce noise (such as film-grain). HUD and other in-game text (such as subtitles), are natively rendered at the target (higher) resolution and applied post render. The FSR component makes two passesupscaling, and sharpening. We learn from the source code that the upscaler is based on the Lanczos algorithm, which was invented in 1979. Media PC enthusiasts will know Lanczos from MadVR, which has offered various movie upscaling algorithms in the past. AMD's implementation of Lanczos-2 is different than the originalit skips the expensive sin(), rcp() and sqrt() instructions and implements them in a faster way. AMD also added additional logic to avoid the ringing effects that are often observed on images processed with Lanczos.
Original Link: https://www.techpowerup.com/284585/amd-fidelityfx-source-code-released-updates-posted-uses-lanczos-under-the-hood
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