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Witek information 25 glöps

• general:
• level: user
• personal:
• first name: Michal

• 4k procedural graphics Windows portrait
• Quote:

  Witek: I tried to run this at work and it got snagged by the AV :) . For IT's peace of mind, which compressor did you use? I presume Crinkler, but I'd like to be able to tell them for sure. Thanks!

  
  Yes, it's just Crinkler. No worries :)
  
  
  Quote:

  Witek: to my understanding PSNR and SSIM in "real world" use cases like this aren't that much different. Both of them are actually somewhat weak since they don't correlate that well with human visual acuity. Seems to me like the biggest shortcoming might be there, so was just wondering how much better it could look with a more specialized metric.

  
  It depends. Generally, SSIM should give more perceptual-like results and outperforms simple PSNR in most cases. Maybe if I have moved the calculations to the GPU and it would be 2 orders of magnitude faster than CPU version (which is most likely) I could experiment with different quality scores.
  
  
  Quote:

  Did your fitness function use a perceptual colourspace?

  
  For this prod, I've just used monochromatic value for calculating MSE (calculated as Y=R+2G+B).
• isokadded on the 2018-01-16 21:38:06
• 4k procedural graphics Windows portrait
• Quote:

  What hat did you use as the fitness function in your genetic algorithm? PSNR or something more specialized?

  
  Yup, just PSNR. I was experimenting with SSIM, but it was too slow to compute.
• isokadded on the 2018-01-16 02:16:23
• 1k procedural graphics Windows cornell box
• Full HD with more samples:
  
• isokadded on the 2017-08-06 21:48:16