Hi, I just discovered Lux (on an M1 mac) – great work, thanks!
Any hope of supporting more projections? I regularly use panini projections for wide panoramas which now cause Lux to exit ungracefully. Mikko On Monday, February 13, 2023 at 11:13:16 AM UTC+2 kfj wrote: > Dear all! > > After a fair amount of testing and tweaking, I am now happy with my > rendering back-end using the highway SIMD library. Vc, which I have used > for intel CPUs until now, has better support for older CPUs: it offers > dedicated AVX (without the '2') support and the 'fallback' mode is > faster than when I use it with highway - but such CPUs are becoming > increasingly rare and using lux with them is no fun, anyway. What tips > the scale for me is AVX512 support. Vc does not produce actual AVX512 > instructions, instead it falls back to emitting AVX2 instructions, so > there is not much to be gained in the rendering code which relies on the > SIMD library - some other code which relies on autovectorization may > benefit, but that's not so relevant. highway, on the other side, *does > support AVX512*, and a friend of mine who has a CPU with AVX512 has run > a test of the Vc version against the highway version of the code. The > performance gain was more than 50%! > > The binaries on my download page are all done with Vc (except for the > macOS ARM64 build, which also uses highway because Vc does not produce > native ARM NEON code). For those of you who have AVX512 on a windows > machine, I now offer a lux-portable ZIP compiled with the highway > backend, so you can see what a difference the SIMD backend makes! It > would be nice if this binary could see a bit of testing, just to be sure > the change of SIMD backend does not introduce unwanted behaviour which > has escaped my scrutiny! I am considering switching to the highway > backend altogether with the next lux version. Please find the ZIP file > here: > > > https://bitbucket.org/kfj/pv/downloads/lux_for_windows_1.1.5_portable_with_highway.zip > > Apart from AVX512, this build supports the fallback ISA (no SIMD), > SSE4.2 and AVX2. The console output will tell you which CPU was detected. > > Kay > > > -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to hugin-ptx+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/2f9e6d88-acdc-404b-8b17-d728c3657eb1n%40googlegroups.com.
