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Registered Member #3271
Joined: Mon Oct 04 2010, 02:29AM
Location: Canada
Posts: 159
Thanks Linas.
I am taking a slightly different appoach using a module based system ( independent clock, stepper driver, photo and flash and "all done send pix to pc" trigger) each module sending or receiving the proper triggers with the uP aggregating signals and the logic to interface with the PC.
My application is also different being visible light photos not x-ray.
Anyone here has experience with OSCAR and its interface with Scilab (since Mathlab is too expensive, for me at least)
Registered Member #540
Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
Linas wrote ...
<video> First test. 1h imaging time. X ray machine was able to hold it :) 250W input and 3,2s exposition. now trying to reconstruct
That's really cool! It's great that you got it all working. If you used your camera for taking the pictures, did you shield it or did there seem to be no damage to the CCD? Could you do a TV flyback with a capacitor in it just cause?
Linas wrote ...
for now i don't know how to print integer like: int j; j=3; PrintToLCD(j); For now just can print string
Can you make the int a string by concatenating a string onto it with the "+" operator?
Registered Member #1143
Joined: Sun Nov 25 2007, 04:55PM
Location: Vilnius, Lithuania
Posts: 721
Myke wrote ...
Linas wrote ...
for now i don't know how to print integer like: int j; j=3; PrintToLCD(j); For now just can print string
Can you make the int a string by concatenating a string onto it with the "+" operator?
i used switch and printing case as string, also made function for switch so i can send number, that function divide it and send it like string, and because cursor is advancing, i had no problem to print number. Now i have nice working user UI for this, i can set lot of parameters at start, and then just press start :)
Registered Member #3271
Joined: Mon Oct 04 2010, 02:29AM
Location: Canada
Posts: 159
Linas wrote ...
First test. 1h imaging time. X ray machine was able to hold it :) 250W input and 3,2s exposition. now trying to reconstruct
Very nice. I'll be interested in the post processing for the reconstruction you end up using. I am trying to get a test scanner with visible light (EGG flash and DLSR camera) to work out the processing interface and get a feel on how long it will take and how many pictures do I need for a given spatial resolution.
Registered Member #514
Joined: Sun Feb 11 2007, 12:27AM
Location: Somewhere in Pirkanmaa, Finland
Posts: 295
The first time I saw this thread I thought that it couldn't be done, and now I just wanted to stop by and congratulate you on proving me wrong! Is there no limit to what a simple hobbyist can achieve?
Registered Member #1143
Joined: Sun Nov 25 2007, 04:55PM
Location: Vilnius, Lithuania
Posts: 721
Here is first reconstruction using entirely MatLab program: Still, need to work out on picture capture quality and alignments :) (it's very low resolution reconstruction. on axis is pixels)
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HomeMade CT [update_first _3D_pictures]
It's great that you got it all working.
