Building a Digital Microscope with Ghost Overlay Mode

RE: Building a Digital Microscope with Ghost Overlay Mode

DAB — Mon, 02 Jan 2023 19:34:22 GMT

Nice post.

The camera looks very cool.

RE: Building a Digital Microscope with Ghost Overlay Mode

shabaz — Sun, 01 Jan 2023 16:30:18 GMT

Figured it was worth a shot with OpenCV. Here's the preliminary result!

This is a 0.5 pitch BGA chip (eMMC NAND Flash I think) pulled off an old single board computer:

RE: Building a Digital Microscope with Ghost Overlay Mode

phoenixcomm — Sat, 31 Dec 2022 23:48:48 GMT

WOW, Neat, and I still have to break out my stereo inspection microscope -- Sadly it gets so little work, still have not bothered to buy a stand for it.

RE: Building a Digital Microscope with Ghost Overlay Mode

dougw — Sat, 31 Dec 2022 21:48:47 GMT

Cool idea to use overlays to align hidden pads. It needs the image flipped as you indicated, but also might benefit from using fiducials that are on both the chip and the PCB, especially if the silkscreen is not perfect. Maybe sticking a marked transparency on the chip might work , or even just a sticking a pin along the edge of the chip.

RE: Building a Digital Microscope with Ghost Overlay Mode

genebren — Sat, 31 Dec 2022 20:17:43 GMT

This is very cool! I have really wanted a nice digital microscope (or at least and eyepiece replacement camera) to allow for easy capture of optically magnified images. The thought of adding overlays is a big bonus. The crosshairs and zooming are great features/ideas.

I added laser lines crosshairs to my lightring to make it simpler to position work into the field of view which might be a nice addition to your project.

Well done!

RE: Building a Digital Microscope with Ghost Overlay Mode

shabaz — Sat, 31 Dec 2022 19:25:08 GMT

Just thought of a very simple solution to my edge-enhancement issue! All I need to do is allow the user to draw point-to-point box on the screen when they have the chip first on the display. In other words, let the user do the edge enhancement : ) The very bright box lines will then always indicate where the chip should fit. I might implement that if the automatic edge enhancement proves problematic.

RE: Building a Digital Microscope with Ghost Overlay Mode

baldengineer — Sat, 31 Dec 2022 19:04:29 GMT

What is the camera software you are using?