3 ms·

> The wide-field of view image reconstruction takes 10 mins on a desktop computer with a GTX 1080Ti graphics card and a i7-8700k CPU to reconstruct an image wit

by m4x 5y ago

> The wide-field of view image reconstruction takes 10 mins on a desktop computer with a GTX 1080Ti graphics card and a i7-8700k CPU to reconstruct an image with 100 by 100 raw pixels That's an impressive amount of computation per pixel

nojokes 5y ago
It is but this is also fairly ancient system. More modern systems should be able to shrink time needed for computation - also research facilities may have access to a cluster.
- robotresearcher 5y ago
  I looked it up. GTX1080Ti is 4 years old.
  - LeifCarrotson 5y ago
    Same 4-year age for the i7-8700k. It's true that it's about half as fast as a modern Ryzen 7 5800X or brand-new Intel i7-11700K, and if you could get a new Nvidia 3080 or AMD RX 6900-XT they'd have a similar doubling in speed, but it's not ancient. Regardless, does the difference between 5 minutes or 10 minutes for 10,000 pixels really matter? It still means that you're running on the order of a hundred thousand operations per pixel; what can you possibly need to do that requires that much processing?
    - andbberger 5y ago
      I haven't read this paper, but extrapolating from my experience working with other super-resolution scopes: reconstruction. Instead of measuring the pixels directly, you measure some projection of them and then have to solve an inference problem to recover the image.
    - lostmyoldone 5y ago
      It's probably doing some equivalent of solving a hard inverse problem approximately using numeric method, likely with as lest as many unknowns per pixel as the image, in a noisy domain, and with an expensive cost function for the optimization. Not saying they are doing exactly that, but something in that realm/scale. 100kOps per pixel is really not that much in those kind of problems.
  - akiselev 5y ago
    It's not ancient by any means, but it is a mobile GPU - I've got a GTX 1080 Ti on my Thinkpad X1 Extreme.
    - CaptainMarvel 5y ago
      A 1080 Ti is not a mobile GPU. Mobile GPUs have the “m” suffix. You just happen to have a (probably underclocked) desktop GPU in your laptop.

by m4x 5y ago

nojokes 5y ago

It is but this is also fairly ancient system. More modern systems should be able to shrink time needed for computation - also research facilities may have access to a cluster.

robotresearcher 5y ago
I looked it up. GTX1080Ti is 4 years old.
- LeifCarrotson 5y ago
  Same 4-year age for the i7-8700k. It's true that it's about half as fast as a modern Ryzen 7 5800X or brand-new Intel i7-11700K, and if you could get a new Nvidia 3080 or AMD RX 6900-XT they'd have a similar doubling in speed, but it's not ancient. Regardless, does the difference between 5 minutes or 10 minutes for 10,000 pixels really matter? It still means that you're running on the order of a hundred thousand operations per pixel; what can you possibly need to do that requires that much processing?
  - andbberger 5y ago
    I haven't read this paper, but extrapolating from my experience working with other super-resolution scopes: reconstruction. Instead of measuring the pixels directly, you measure some projection of them and then have to solve an inference problem to recover the image.
  - lostmyoldone 5y ago
    It's probably doing some equivalent of solving a hard inverse problem approximately using numeric method, likely with as lest as many unknowns per pixel as the image, in a noisy domain, and with an expensive cost function for the optimization. Not saying they are doing exactly that, but something in that realm/scale. 100kOps per pixel is really not that much in those kind of problems.
- akiselev 5y ago
  It's not ancient by any means, but it is a mobile GPU - I've got a GTX 1080 Ti on my Thinkpad X1 Extreme.
  - CaptainMarvel 5y ago
    A 1080 Ti is not a mobile GPU. Mobile GPUs have the “m” suffix. You just happen to have a (probably underclocked) desktop GPU in your laptop.