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High definition photo

Posted by Account Closed  
Account Closed January 29, 2012 12:13PM
For people who do not see the pictures in the French part, I show you some examples of high-definition images. The first is a small picture of the order of 50 Mpix and the next in the order of 75 Mpix. The images are highly compressed ... but the size is right.

image 01

image 02

and 2 small images of these links

Edited 2 time(s). Last edit at 01/30/2012 04:25PM by Frédéric Hède.
Harjo Neutkens January 29, 2012 02:00PM
Very impressive! Mes felicitations.

Edited 1 time(s). Last edit at 01/29/2012 02:00PM by Harjo Neutkens.
Mineralogical Research Company January 30, 2012 02:52AM

Excellent work! You have taken mineral photography one step further along its evolutionary path.

If I am not mistaken, you have accomplished a method that I have only thought about. I am assuming that this is a stitched together composite of numerous multi-focus stacks.

Account Closed January 30, 2012 03:23AM
Hi Gene !

That's right, it's this method.

No limitation in x,y and Z axis.

For the moment i try with my 4x objective but new test with others objectives in some days.

Harald Schillhammer January 30, 2012 06:54AM
Hm, I thought I replied to this yesterday but something must have gone wrong.
Anyway, my question has been answered already (because Gene asked the same).

Very nice results.

However, I have an additional question: do you move the camera setup or the subject? The best method would be to move the camera but with the lens staying in position - then stitching is a piece of cake. The only problem is that you have to use a lens with a large enough image circle.
I have always wanted to try that but I would need another kind of bellows for that, one with a shift option.
I guess you use an xy-stage to move either the entire set-up or the subject, right?


Jeff Weissman January 30, 2012 03:30PM
Frédéric is doing panoramic merge of sets of focus stacked images, with deep stacks in the Z-direction, and not just focus stacking, with incredible results. I have tried similar with less deep stacks, but I am limited by the resolution of my camera body, as in my not as sharp as I would like example here -

Edited 1 time(s). Last edit at 02/02/2012 11:28PM by Debbie Woolf.
Account Closed January 30, 2012 04:24PM
Hello Harry,

In my case it is the mineral that moves. For now they are testing because I have to also work depending on the capabilities of the software (Photomerge)

I use an XYZ stage with a stroke of 40 mm in all directions. The first objective is a Nikon CFI 4X achromatic. The base image has a field of view 3.5 mm. I'll try to see with others objectives. Image with this objective is 15 mm. My work is done with a bridge not a reflex.

This method is easily appliable for subjects up to 2 mm field to keep a sufficient resolution.

But this method is also applicable to larger issues and I will try quickly in this case.


Edited 1 time(s). Last edit at 02/02/2012 11:29PM by Debbie Woolf.
Account Closed January 30, 2012 08:40PM
A small try with a DCR 250, not expensive but interessant close-up.... not a very big image. First with this objective.

image with dcr 250

I think than now, all people can built great image with inexpensive material.

And the size for internet

Edited 4 time(s). Last edit at 02/02/2012 11:30PM by Debbie Woolf.
Mineralogical Research Company January 30, 2012 11:55PM

I believe that the defining difference between Matteo's images and Frederic's images is in the total pixel size of the final images. Of course there is no need to make 75MP images to show on a 2MP computer monitor, but those who wish to print large photos for display, or other purposes, are condemned to use huge files. Another case for super resolution images is that even on a computer monitor, you can display a non-micro image and then have the capability of zooming in to see micro details that would not be visible in the wider field of view.

For example, a 15000X5000 pixels (75MP) would make a high quality print of 50" x 17" (127cm x 42cm), A single 18MP image, from a APS-C sensor, would be approximately 5184 x 3456 pixels and would yield a high quality print of 17.2" x 11.5" (43.7cm X 29.3cm). If displayed on a monitor, there would be a difference in available zoom factor of ~3 between these file sizes. So, depending on the final result desired, bigger can be better.

The trend towards super resolution images is becoming popular in various scientific disciplines. One amateur astronomer has created an image of the sky that is 5000 MP in size and is a composite of over 37000 images! It allows one to see the whole sky and then zoom in to see very fine detail.

This is the way that science goes.... Stop long enough to see what you have done and be left in the dust. So, I admire those who push the limits. That said, I believe that both Frederic, Matteo and others are on the cutting edge. I can only aspire to refining my capabilities to these levels.

Keith A. Peregrine January 31, 2012 02:30AM
What beauty! Frederic and Matteo both of you are artists!!!

Account Closed January 31, 2012 07:28PM
Hello !

Here an other example (unperfect, for the moment i see the best method). 4 image for this construction... Just DCR 250 and xyz stage

image zoomable

And small image
Christian Auer February 01, 2012 10:18AM
Just saw your zoomable rutile Frederic, thats absolutely amazing!
Great job and thanks for sharing!
Account Closed February 01, 2012 08:40PM
Thanks Christian,

last image 40 Mpix ( and 6 photos stacked)

photo for zooming
Harjo Neutkens February 01, 2012 09:00PM
Le Sagenite est vraiment superbe!

Edited 1 time(s). Last edit at 02/01/2012 09:00PM by Harjo Neutkens.
Christian Auer February 02, 2012 08:36AM
Back to topic: Frederic, if you have some spare time then goto a forum where you see experts from whom Harald was talking

If you search for "stitching" you will find some great ideas like

I wish you good luck with your phantastic work. Unfortunately my time is too limited to do the same.

Edited 1 time(s). Last edit at 02/02/2012 11:42PM by Debbie Woolf.
Debbie Woolf February 02, 2012 11:54PM
It's unfortunate this discussion went in the wrong direction !

I have edited & deleted non-relevant comments to the topic Fred started.

I'm sorry if that happens to be a post you made but I needed to bring some order into this great topic.

Account Closed February 03, 2012 07:32AM
New photo in some days i hope ;). Standard work is waiting me. I search also an objective for make photo between 4x and DCR 250....

Stage xyz could be find in ebay also.
Account Closed February 05, 2012 08:27PM
New photo for zooming..... Size is 64 Mpix. Built with 9 stacked-photo. Zoom x12, DCR 250.

Big here
Big image with zooming

small here
Account Closed March 27, 2012 06:52PM
I'm working about the second generation of these photographs. Quality and sharpness is better (really). I have now two lens tube.... Result tonight for the first construction.
Account Closed March 27, 2012 08:51PM
Here new photo with the new tube....

difference ?

Mineralogical Research Company March 30, 2012 03:20PM

Your persistence has been richly rewarded and your last contribution is simply superb! Keep up the good work and please post your future results, as I'm sure they will be of interest to all who follow this topic.

Harald Schillhammer March 30, 2012 04:46PM
Hm, I wonder. 11mm FOV with a 4X objective means that the extension (tube length) must be very short. What kind of tube lens (focal length) did you use for that last azurite photo?
If I use a 5X objective with my tube lens (focal length 200mm) at an extension of 160mm I get a FOV of ca. 7 mm. Anything much shorter than that and the image suffers from vignetting and loss of resolution, especially in the corners. Ideally, for a 4X objective, I would expect a FOV of about 8mm for peak performance.
I know that the Nikon CFI Plans have quite a tolerance for extensions deviating from the design length and the problems that might occur are difficult to judge in your image because the in-focus parts are rather centered.

It would be interesting if you could make a photo with identical set-up but choosing a specimen with much finer detail that covers the entire frame. This would really reveal any short-comings.



Edited 1 time(s). Last edit at 03/30/2012 04:51PM by Harald Schillhammer.
Account Closed March 30, 2012 06:52PM
11 mm with 4 images. I work with a panoramic tehnic. With my 100 mm tube lens, maximal FOV is 6 mm with my system.

I try with my 2x objective (new ! Find in china.... less expensive than mitutoyo but i can said result seems very good).

Result fastly.

Thanks for all Gene and everybody !

Edited 1 time(s). Last edit at 03/30/2012 06:53PM by Frédéric Hède.
Harald Schillhammer March 31, 2012 07:05AM
Ah yes, I'm sorry. I didn't take the panorama into account.

Uwe Ludwig March 31, 2012 09:20AM
Thank you, Frederic. It’s always a great enjoyment to make a journey through the crystal landscape.

Uwe Ludwig
Account Closed April 14, 2012 11:31PM
Last generation of HD photo

Big here (42 Mpix)
Image zoomable

and small too
Account Closed April 29, 2012 04:54PM
I use this technic often now.

An other example here :

small image and a link for the big

Big image here

Edited 1 time(s). Last edit at 04/29/2012 04:54PM by Frédéric Hède.
Rock Currier April 30, 2012 02:12AM
When you know the localities pretty much for sure you should consider uploading them to our general gallery where they won't get buried under all the new message board entries that will eventually bury them.

Rock Currier
Crystals not pistols.
Account Closed May 09, 2012 12:23PM

most of them are on mindat.

This specimen have been built with panoramic technic, she is small here but quality is very high.... Click on and quality is better but far of the original.

Edited 2 time(s). Last edit at 05/09/2012 12:25PM by Frédéric Hède.
Account Closed June 28, 2012 04:27PM
And last.... this compilation is a 100 Mpixel photo. Good trip :). Size is 60 mm of FOV

A trip in a small world
Roger Curry June 29, 2012 07:51AM
Stunning images Frédéric. Please post more, magnificent work!
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