@Searke fuck, we don't say "fuck"? what the fuck.

@acl Yo gotta reddit that shit, yo

@rm-rf. No, I did not mark the questions I'm referring to as favorites. I didn't, AFAIK, interact with them in any way.

@Pickett are you around ?

@Sektor Yes

@Pickett Im gonna be kind .. rude i guess so bear with me

@Pickett Are you in academia or private ?

@Sektor I'm a student.

@Pickett I am asking you because I wanna come to sweden and right now we have erasmus+

@Pickett And I am trying to find my place :D

@Pickett Ah, okay, do you have any idea where I can look for open positions in Sweden ?

@Pickett say medical imaging, signal analysis, etc etc

@Sektor I'm sorry, I'm afraid I don't know.

@Pickett Well, can you at least recommend an university ?

@Pickett I doesnt have to be like directly linked to those fields

Naturally I'm going to say that Chalmers University of Technology is the best university, since that's where I am, but some people say that KTH Royal Institute of Technology is just as good.

Thank you, I will start emails :D

start writing *

oh my im so clumsy today

:D

I've never visited any other university. There are some other universities with good reputations, but these two I think are the largest/most respected. I think you should consider where you want to live perhaps, in Stockholm or Gothenburg.

Well, yeah, but, first, lets see who's gonna accept me and then i will start refining

:)

@Sektor You might also take a look at what master programmes the different universities have. Their names aren't "signal processing", "medical imaging" and so on but more general like "Complex Adaptive Systems" or "Fundamental physics"

@Pickett Yeah, I was just throwing those around in case you knew someone was actually interested in those fields

@Sektor OK, here is a link. Good luck :)

@Pickett Thank you :)) !

@m_goldberg Not the question, but the tag... you have one tag marked as favourite. It should show up in the home page's sidebar on the top right

@rm-rf. OK, now I get it. I don't remember setting a favorite tag, but I found I had one. I deleted it, so all is good now.

Has anyone here every done some image processing on x-ray images?

@Pickett When I was in KTh they claimed to be at least as good :P But Chalmers got all the money when it came to Mechanics :D

@Sektor And TBH, KTh is much prettier than Chalmers: csc.kth.se/utbildning/program/sc/DSCN1239.JPG, the big trees are gone though.

I need to check a row of a matrix in a loop and was wondering if there is an alternative to this

kr = Table[RandomReal[3], {10}, {5}]
a = Table[RandomReal[300], {i, 10}]
loopbegin( update kr; Ll = Transpose@kr;
If[Total@UnitStep[Ll[[3]] - a] > 0, 1, 0] ) loopend

@Öskå what kind of processing?

I think kr[[All,3]] is not compilable and I am looking a way to use it in a compiled function.

@Öskå Damn, that is pretty. I really think of KTH and Chalmers as equals. There are other good universities too I think you'll agree, I just don't know a lot about them :)

Luleå University, Lund University and Linköping University appear to be those that are ranked as second best after Chalmers and KTH.

All in all there are about 20 universities of technology, but the rest have significantly worse scores.

@Pickett I was looking for master programs @ Lund like a year ago

@Sektor OK, that's probably a good choice too.

@Öskå I will consider both options; right now I am just looking for an open position

@Pickett Well, you have better info than me so I am taking your advice into account :D

@Öskå I did a bit of image processing recently, why ?

@Sektor meh, I just have hearsay. I don't want you to take me seriously.

@Pickett But you are living/studying there, so even though you might think you are biased you provide insider info and thats valuable :D

@blochwave @Sektor I basically have +200 xray DICOM and JPG images of my head (starting from my nose to the top of my head) and the two images are different, so I was wondering what has been done on to the DICOM images to turn into the JPG ones. DICOM on the left, JPG on the right: i.xomf.com/fsmkc.png

Then I'm considering trying a multiplanar reconstruction with these +200 images to have my wannabe 3D skull.

I'm sorry, I took the grumpy face slice of my brain :P

@Öskå very grumpy! No experience with DICOM files...when you say "different", how so?

Well, something has been done in order to transform the DICOM graphics to the JPG one. They don't really look the same, the grumpy face is much clearer on the right picture

so I'm trying to get the right image from the left one with Mathematica

But have I no idea what has been done on it

@Öskå Can you send me those 200+ images ? I have been looking for a real life data set for a long time :D :D

(sorry, missed your point about them being different). Is it a 16-bit vs 8-bit difference?

Or a log-scaling?

@Öskå If you play with the brightness and the contrast you get similar looking pictures: ImageAdjust[brainscan, {7, 0.2}]

I think it might be a matter of finding the right values...

Could be that the jpg has a log-intensity scale or something

Yes I believe these are usually scaled non-linearly

I worked in a lab that did this kind of stuff but I didn't do it personally

But @Pickett has the right idea

@Öskå Man, I have to go scan my head then ... :D

@Sektor I'm afraid that you will have to indeed :P

@Öskå That's a better example. The left one is the dicim image and the right one is the jpg.

@Öskå :D :D

Code in case you want to try it out:
Manipulate[
 GraphicsRow[{
   ImageAdjust[img, {contrast, brightness}],
   img2
   }, ImageSize -> 500],
 {contrast, 1, 50}, {brightness, 0, 1}
 ]

@Pickett mh, they are basically the same :o I tried to play with brightness and contrast this morning but I didn't have that. What are the coefficient?

@Öskå the scaling might be newintensity=log(1+oldintensity) or something

19.1 and 0.208

it crops up with Fourier transforms a lot, and I've used it for diffraction patterns.

@Pickett I played with it until 0 & 15..

:P

@blochwave that sounds complicated :p

@Öskå For the next step is it enough to just feed them to Image3D?

@Öskå Similar example in "Interactive Examples" here reference.wolfram.com/language/ref/Image3DSlices.html

@Pickett I'm not sure how to proceed yet :P I have ~+200 images with a 0.7mm between each of them, right now I'm not sure what to do with them :P

@mfvonh But I want the 3D from the images :P They do the images from the 3D

@Öskå If they are aligned I think you should be able to feed them to Image3D and it will create a 3D brain for you.

Yeah just build it with Image3D, it's straightforward

or should be anyway

haha

@mfvonh I'm not sure it's that straightforward :P And I would fancy to fill the gap between the images.. and I need to remove the background.

@Öskå Fill the gap = interpolate?

I'm not sure you need to interpolate for 7mm..

Better to just render it with what you have and then stretch the image to the appropriate size.

@Öskå Yeah I imagine you will not need to do that once you play with it. But if you needed to, you can upsample by averaging pixel values with ImageApply

Ok now I have a problem, there is no Image3D on v8, that's why I wasn't sure how to proceed :P

ack

Dinner time :) Thanks for your help guys :D Will come back later :P

@Öskå OK, take a look at this when you're back.

@Sektor The post I just mentioned uses this dataset, it appears to be the same kind of dataset as what Öskå has.

@Pickett Great ! Thanks :) !

@Pickett I knew there was something but I just couldn't find it! I even upvoted that question back in times, tack så mkt!

@Pickett But I'm still alive :P "Description: CT study of a cadaver head"

@Öskå lol

@Pickett i.xomf.com/xjkyv.png That became too easy with the link you provided :P But quite hard for my poor laptop :D

@Öskå Nice! Thanks for sharing. Very cool.

@Öskå How did you get those scans? Did you ask a doctor like, "could you email me the DICOM files?"

@Pickett ermm, I had a bike accident with a trauma so they did the scans :P

And I asked them if I could get them, they burnt a CD with all the DICOM images on it :D

@Öskå nice, I would never have thought to ask.

@Pickett Just have an accident and ask them :P Make sure that your head bleeds :P

@Öskå :D

@Öskå that is likely the most expensive CD you have ever owned

@chuy I'm glad everything was free then :P

I guess what I said in only true in the US

@chuy I guess so too :) But it's certainly the CD with the most interesting things I've ever owned :D Too bad they started at my nose :(

Can someone please try if sending mail from Mathematica through Gmail works like this? community.wolfram.com/groups/-/m/t/325255

@Szabolcs I use like this:

@Öskå pfft, that's nothing. I was an undergraduate in the building on the right of this and I did my PhD on its sister masterpiece on the left

From close up, the one on the right is actually covered in green bathroom tiles.

And I can see the window of one of my old offices on the left. It was facing a blast door on the building under the camera. This was literal: you could hear explosions from in there at random intervals (I guess it was a wind tunnel or something).

talk about curb appeal

there was also a bell-ringing society, which was basically a group of people who ring (church or tower) bells as a hobby

they did this to the bells on this, which is next to the buildings I mentioned.

That sounds like a society founded on spite

@mfvonh it's situated in south kensington, next to hyde park and the royal albert hall. The Royal Albert Hall is across the street to the green building (the Blackett Laboratory), right off the right edge of the frame. I used to smoke on its front steps between lectures

@mfvonh or too much beer during lunch

@acl I'm not sure I know the distinction

We are lucky to have a pretty nice location

the prices in that area are incredible

@mfvonh how's that better? at least we had hyde park 100m away!

Oh I didn't mean to suggest it was better

Just better than many

@mfvonh Although I admit yours is less grotesque

The picture isn't great but it's right on the lake

so what is this, Northwestern?

But yes I imagine Kensington is a bit more swank than north downtown Chicago

Yes

(and how on earth do I know that, I wonder?)

It's pretty exquisite for about 3 months out of the year

No doubt because we are the most illustrious institution human civilization has ever established. Just ask our administrators and the people who set the tuition.

@mfvonh that's the nice thing about London. The passage of the seasons is a formality. All you notice is a slight modulation in the amount of rain/day

@acl here is that same highway in less happier weather

less happy, rather

I am originally from Florida where it is much the same. It just varies between 90-100% humidity and 85-105 degrees

@mfvonh Yes well I know (knew) someone who, upon not doing terribly well at his exams, was encouraged to transfer to a "lesser" institution. That's the word they used.

@mfvonh OK yes London's a bit colder than that

@acl We are certainly a good school but I have been pretty put off by the rampant snobbiness

No snow though (although if it drops below freezing everything just closes; public transport, Heathrow, everything)

@acl That sounds like DC. I worked there for a couple of years and the slightest bit of snow tended to paralyze the city

And the federal government will send its workers home like they are elementary school students

@acl Alright you win, your place was way prettier ;o) Take a look at this ;D

There are more pictures on the same website :) gallery.re-web.eu/Sweden/Stockholm/KTH

@Öskå roughly how many students are there?

@mfvonh 15 000, and about 1600 PhD students.

Is that a large university by Swedish standards?

@mfvonh Sweden has a few large universities like that.

@mfvonh In that same city there is also Stockholm University who have 70000 students, of which 29000 study full time. 1400 are exchange students. So education is a pretty big business...

@Pickett I am always so surprised by how large some European schools are. My undergraduate was at the second largest school in the US by enrollment with 60000

I don't know how it works out though. In my undergraduate program we were only 60 people, there are about ten difference programmes. So that works out to 600. Times three years, that equals 1800 students. Add two year master students to that, that makes for another 1200 students for a total of 4000 students. So what kind of students are all the rest? We are supposed to have 11 000 students... so the numbers seem very large to me too.

Rather the 5th largest with 50000, I just misread the chart.

@mfvonh In the case of Stockholm University like I said only 29000 were full time students. The rest might just have registered for a course or two (studying language as a part time hobby or something like that.)

Oh I see. I assumed that meant at least degree-seeking

Though now that I think about it I am unsure how many degree candidates are reflected by the 50000 number

@mfvonh The US has a tradition of having private universities that compete with each other. In Sweden I think all universities but Chalmers are owned by the state, and less competition could potentially lead to larger universities I guess... but this is just speculation.

@Pickett I think that is correct. The largest schools here tend to be public.

@Öskå well I spent some time working at a place where the engineering dept looked like this

(admittedly physics was even uglier than the ones I showed earlier)

I cycled past this every morning on the way to work

and past this on the way back. All these belong to the university

@acl Did you have same sky effect? :p

@Öskå it's just a long exposure, I didn't do it on purpose actually

(and that was literally on the way home from work!)

Oooh, so you took these pics, nice :)

In Beligum "une fois"

@Öskå currently, I work in this flying building

@Öskå it's in Flanders though. They speak Flemish (Dutch) :)

@acl Ah, my bad then :P But nice building :D I just hope MPI is not related to openMPI :D

@Öskå No :) ("Max Planck Institute"), this

our cluster does not even support openMPI!

It should :p But I rather like Max Planck Insitute than openMPI :P