Search found 8 matches

by Brigadir
Mon Oct 20, 2014 9:10 pm
Forum: General Development
Topic: Path tracing accumulation artifacts
Replies: 13
Views: 9561

Re: Path tracing accumulation artifacts

Ingenious, you are right, thanks a lot!
It was quantization error. I have implemented a trivial random and then floyd dithering and it solved the problem a bit. However, a perfect solution requires more efforts. Probably it is needed to port a OpenImageIO library.
by Brigadir
Sun Oct 19, 2014 8:56 pm
Forum: General Development
Topic: Path tracing accumulation artifacts
Replies: 13
Views: 9561

Re: Path tracing accumulation artifacts

Just add that applied gamma is 2.2
by Brigadir
Sun Oct 19, 2014 8:43 pm
Forum: General Development
Topic: Path tracing accumulation artifacts
Replies: 13
Views: 9561

Re: Path tracing accumulation artifacts

it is the same with different resolution and then upscaling and downscaling the final result. The sample index doesn't matter at all, since there are just 512*512 samples, and each time they are updated (actually 15000 times each). The artifacts follow the light intensity distribution across the wal...
by Brigadir
Sun Oct 19, 2014 8:13 pm
Forum: General Development
Topic: Path tracing accumulation artifacts
Replies: 13
Views: 9561

Re: Path tracing accumulation artifacts

this is irrelevant calc, double type is used.
by Brigadir
Sun Oct 19, 2014 7:54 pm
Forum: General Development
Topic: Path tracing accumulation artifacts
Replies: 13
Views: 9561

Re: Path tracing accumulation artifacts

the resolution doesn't matter, it is 512x512 rendered and displayed. Other renderers for the same scene produce correct results
by Brigadir
Sun Oct 19, 2014 7:27 pm
Forum: General Development
Topic: Path tracing accumulation artifacts
Replies: 13
Views: 9561

Path tracing accumulation artifacts

Hello guys, Thanks for organizing this valuable forum! Please, see the image - it is a path traced accumulated image with 15000 samples per pixel. Each pixel color has the structure {double r, double g, double b}. At each PT pass these are accumulated: pixel.r += pass.r, pixel.g += pass.g, etc. When...
by Brigadir
Wed Dec 12, 2012 8:18 am
Forum: General Development
Topic: How to display HDR image?
Replies: 1
Views: 2306

How to display HDR image?

http://graphics.ucsd.edu/~iman/BDPT/Mirage%20v.2.0%20BDPT%20MIS%20FINAL%201024s.png There is a path traced image such as this one. It is rendered with a path tracer where for each pixel we hold RGB values: float3 ColorAcc[resolution] float weightSum[resolution] ... ColorAcc[pixel_id] += w * color; ...
by Brigadir
Mon May 14, 2012 11:44 am
Forum: Links & Papers
Topic: Improving Data Locality for Efficient In-Core Path Tracing
Replies: 14
Views: 17294

Re: Improving Data Locality for Efficient In-Core Path Traci

Please, can you send/PM me this paper?

Go to advanced search