1956-D RPM #1 Lincoln Cent Mintmark Detail

[rmpsrpms]

 

[thedeadpoint]

Unbelievable! How did you take those pics?

[Art1.2]

Great shots of a great coin. Well done.

[rmpsrpms]

Here's a 1951 D/S OMM#1

[Art1.2]

Very nice.

[rmpsrpms]

Here's a 1949-S Lincoln Cent DDO#3 presented with a couple of techniques.

Unprocessed image using 5x magnification, 25-stack of images:




Unprocessed image using 10x magnification, 36-stack of images:




3D processed 10x image but looking straight on to compare with unprocessed:




3D processed 10x image looking at 45-deg from 9:00:




3D processed 10x image looking at 45-deg from 2:00




I think this technique is useful to help visualize these kind of variety details in a similar way to viewing then with a microscope, at least the way I view them. I'm not so sure the 3D versions of these is all that useful, but some may like them. I find them kind of gimmicky, and while they can be sort of cool they don't offer any more information than the 2-D perspective views above. If you disagree, let me know. It's not too hard to include 3D versions of these.

Ray

[thedeadpoint]

That's amazing. How do you compose the 3D pics?

[rmpsrpms]

That's amazing. How do you compose the 3D pics?

 

The process is the same as focus stacking, ie taking a series of photos at different focus planes and then using software to create a composite image using only the in-focus parts. There are several software packages that will do this such as Zerene Stacker, Helicon Focus, even Photoshop. The software creates a "depth map" as it moves through the stack of images, so it knows the relative depth of the in-focus parts it includes in the final image, and can then use this depth map to create variable-angle perspective representations of the image.

[thedeadpoint]

So you're not actually changing the angle of the object (coin) or the subject (camera) - the program is extrapolating from the varying depths of focus what the different angles would look like.

[rmpsrpms]

So you're not actually changing the angle of the object (coin) or the subject (camera) - the program is extrapolating from the varying depths of focus what the different angles would look like.

 

That's correct. All done with software. It would be extremely tough to get this level of clarity with a tilted coin. The stack depths would be excessive and the result would likely not be very good.

[thedeadpoint]

Fascinating! Thank you for sharing! I look forward to more from you