mawyatt Loc: Clearwater, Florida

This is my first major attempt at serious chip image stitching. The final image was reduced to ~16k by 12k pixels and flattened from over 2GB to over 1GB. It took 16 (actually 19) separate 400 image stitches to complete and I’ve been working on it for 2 weeks now!!

I use my modified surplus THK rail and a modified Nikon 200mm F4 Q old broken film lens with a Mitutoyo infinity corrected objective lens. Camera body was a Nikon D500 DX. I use the DX because of the slightly higher pixel density than the D800, and the modified Nikon 200mm with objective lens will vignette on the FX full frame sensor

Early on I found I was getting banding within the ~400 stacked images similar to what I had seen long ago and traced to JPEG compression, but I am using 16 bit TIFF format for that very reason. I found that my strobes were not aways providing uniform output, at least that'€™s what I thought. I'€™m using separate RF receivers on each strobe that are triggered from the camera. I decided to also engage the optical trigger that fires the strobe when it "sees" another flash, thinking this could help synchronize all the strobes and provide a "harder"€ trigger command (lots of reasons why this might help with these cheap strobes). Sure enough it eliminated the banding I was seeing during stacking sessions!!

Anyway, I still have lots of work to do and try an improve with more sessions & chips.

But I'm on my way to a 20K by 15K pixel massive chip image, and maybe even 30K by 20K. Here’s the very low resolution JPEG, the standard JPEG is a 100MB!!

Mike

Test Chip in IBM 8WL SiGe BiCMOS

(Download)

EnglishBrenda Loc: Kent, England

Wow, that looks a lot of work but you seem to have a good result.

mawyatt Loc: Clearwater, Florida

Yes it is a lot of work, the results are getting better. These chips aren't the same as insects because of the highly reflective tiny spherical mirror solder balls (60~100 microns), the reflective chip surface and highly precise repeated orthogonal patterns. All this makes capturing, stacking and stitching images very difficult, and lighting becomes a nightmare!!

Anyway, I've paid my dunce dues and now trying to move forward.

Best,

Mike

raymondh Loc: Walker, MI

Impressive!

mawyatt Loc: Clearwater, Florida

I've loaded the higher resolution JPEG (97MB) on Nikon Image Space (NIS). Others on another forum are having trouble and getting errors from NIS, hopefully that's not the case here.

https://nis.nikonimagespace.com/html/myphoto/en/view/albums/albums/0l5sw6500000n9lpg8o106h7vv2/photos?sortBy=shotDate&sortOrder=asc

Please take a look (it's a big file and can take some time to load).

Best,

Mike

mawyatt Loc: Clearwater, Florida

Just got another conformation of this not working, so it seems you may need to be a NIS member to view images.

mawyatt Loc: Clearwater, Florida

Saul on another forum solved my problem, so this link should work!!

http://img.gg/qQxNYMJ

Best,

Mark Sturtevant Loc: Grand Blanc, MI

Very impressive! Nice work.

mawyatt Loc: Clearwater, Florida

Here's a link you can download the images from and zoom in.

http://img.gg/yZNjmZ2

Best,

PaulBa Loc: Cardiff, Wales

Wow ............