Patent ID: 11915397
Assignee: IMAGINATION TECHNOLOGIES LIMITED
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method of rendering an image of a 3-D scene, the method comprising:
rendering a noisy image;
obtaining one or more guide channels; and
for each of a plurality of local neighbourhoods:
calculating the parameters of a model that approximates the noisy image as a function of the one or more guide channels, and
applying the calculated parameters to produce a denoised image,

wherein calculating the parameters of the model comprises:
defining a first tile, defining respective first contiguous portions of the noisy image and the one or more guide channels, each comprising a first plurality of pixels;
defining a second tile, defining respective second contiguous portions of the noisy image and the one or more guide channels, each comprising a second plurality of pixels;
calculating a first outer product between each pixel in the one or more guide channels and itself; and
calculating a second outer product between each pixel in the one or more guide channels and the corresponding pixel in the noisy image,
wherein the first outer product and second outer product are calculated for pixels in the first tile either (i) before the second tile or (ii) concurrently with the second tile.