by RocketRon » Sat Apr 13, 2019 4:07 am
Chris Peterson wrote: ↑Fri Apr 12, 2019 1:16 pm
There are a dozen links in the caption and subsequent pages of discussion here to sites that explain, at all different levels of detail, how this image was made, what wavelength was used, how interferometry works, what the different parts of the image are showing us and why they look the way they do as a consequence of general relativity. There are also superb and easily used resources like Wikipedia where you can quickly look up concepts like "reddening" and see what they mean.
Sure there are.
But perhaps I didn't make it clear enough, its the methodolgy behind this ALGORITHM that is of interest here.
There is no detailed discussion anywhere ? of this algorithm, in any significant detail. ??
And surely that is important.
BBC News showed a brief glimpse of the 'sky map' raw data (for want of a better word) produced by this project,
and it looked like random blotches with a few stray curved looking patches scattered about.
The algorithm that pulled this into the shown neat donut image was indeed fortuitious ?
And worthy of some scrutiny, in detail...
Sure, others have used similar techniques.
Have they published specific details of their algorithms, or do we just take it on blind faith.
Peer review is supposed to be how it works, and the scientific method is to question everything,
especially if its not obvious how they pulled a rabbit out of the hat.
https://www.ted.com/talks/katie_bouman_ ... _look_like
btw, I've just heard someone in the TV media who should know better refer to this as a 'photograph',
so the glimmer of fake news is just around the corner...
Chris Peterson wrote: ↑Fri Apr 12, 2019 1:16 pm
BTW, this is hardly the first image produced this way, or the first one to be featured on APOD. A number of images have been shown which were created by radio telescope arrays, and they all use similar processing, because the method is straightforward and based on well understood math and optics. The exceptional thing about this image was the technology that increased the spatial resolution, and the consequences of this particular observation in terms of strengthening support for GR.
[quote="Chris Peterson" post_id=291404 time=1555074969 user_id=117706]
There are a dozen links in the caption and subsequent pages of discussion here to sites that explain, at all different levels of detail, how this image was made, what wavelength was used, how interferometry works, what the different parts of the image are showing us and why they look the way they do as a consequence of general relativity. There are also superb and easily used resources like Wikipedia where you can quickly look up concepts like "reddening" and see what they mean.
[/quote]
Sure there are.
But perhaps I didn't make it clear enough, its the methodolgy behind this ALGORITHM that is of interest here.
There is no detailed discussion anywhere ? of this algorithm, in any significant detail. ??
And surely that is important.
BBC News showed a brief glimpse of the 'sky map' raw data (for want of a better word) produced by this project,
and it looked like random blotches with a few stray curved looking patches scattered about.
The algorithm that pulled this into the shown neat donut image was indeed fortuitious ?
And worthy of some scrutiny, in detail...
Sure, others have used similar techniques.
Have they published specific details of their algorithms, or do we just take it on blind faith.
Peer review is supposed to be how it works, and the scientific method is to question everything,
especially if its not obvious how they pulled a rabbit out of the hat.
https://www.ted.com/talks/katie_bouman_what_does_a_black_hole_look_like
btw, I've just heard someone in the TV media who should know better refer to this as a 'photograph',
so the glimmer of fake news is just around the corner...
[quote="Chris Peterson" post_id=291404 time=1555074969 user_id=117706]
BTW, this is hardly the first image produced this way, or the first one to be featured on APOD. A number of images have been shown which were created by radio telescope arrays, and they all use similar processing, because the method is straightforward and based on well understood math and optics. The exceptional thing about this image was the technology that increased the spatial resolution, and the consequences of this particular observation in terms of strengthening support for GR. [/quote]