General > General Technical Chat

Illustrating the complexity of silicon (Deep zoom of a CPU)

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mawyatt:
Better lenses, better cameras, better fixtures, pixel shifting, nanometer resolutions........ ;D

https://www.closeuphotography.com

As you asymptotically approach that perfect chip image with infinite resolution  :-+

Best,

magic:
For the record, I have had good luck stitching a few IC mossaics with tens of frames fully automatically in Hugin, after messing with configuration a little.
That being said, my chips were merely a few mm² (and image quality wasn't quite the same too, but that's another matter :P)
https://www.eevblog.com/forum/projects/decapping-and-chip-documentation-howto/msg3613732/#msg3613732

SpiralElektronik:
Yeah tens of frames are no problem, thats what lead me astray. But i think youll find you get better results doing it manually once you get the steam up. I don't use the automatic features even for very small projects like this  U776HC opamp. 6 frames using a 10x objective iirc.

magic:
I'm too lazy for that ;)

CPFind gets majority of the points bang on, provided that I restrict it to searching correct image pairs and only compensating for camera movements. The points it gets wrong are typically a few px off and don't cause significant misalignment (their error contributions likely average out anyway), or they could be easily corrected manually if problems arise. That's still much less work than doing everything from scratch. It's a nice thing about Hugin that it enables mixing manual work with automation in quite arbitrary order and proportions.

mawyatt:
When you do significant depth images like we have done in the past, with multiple stitches, things become much more difficult. This is where simple lens and techniques fail due to image perspective shifts, and for good results one needs to look for more tele-centric lenses (at higher magnifications some typical lens aren't too bad tho, but requires trial and error).

As mentioned by OP SpiralElektronik, larger chips like the 486 are quite difficult, especially with depth (tilt) and require significant skill, technique and patience than smaller planar subjects, and are generally well beyond the typical hobby level efforts!!

We tried Hugin long ago, after PS failed to stitch larger image sessions, and another program (can't remember the name), but ended up using PTGui as it was the only program that actually worked on all our larger stitches. PTGui also requires significant learning curve, and much hand holding to successfully render a quality image, but can do so with proper use.

Honestly, we didn't give Hugin as much attention as we should since Rik Littlefield (author of Zerene stacking program) recommend PTGui and that's what we went with. Never tried CPFind tho, it might not have been available when we started the massive S&S efforts many years ago.

Best,

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