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Mineral PhotographyHigh definition photo

29th Jan 2012 12:13 UTCAccount Closed

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

http://www.alpinismeetmineraux.fr/mineralogie/macro/supermacro/supermacro395.jpg
http://www.alpinismeetmineraux.fr/mineralogie/macro/supermacro/supermacro396.jpg

29th Jan 2012 14:00 UTCHarjo Neutkens Manager

Fred,

Very impressive! Mes felicitations.

30th Jan 2012 02:52 UTCEugene & Sharon Cisneros Expert

Frederic,


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.


Gene

30th Jan 2012 03:23 UTCAccount Closed

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.


Fred

30th Jan 2012 06:54 UTCHarald Schillhammer Expert

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?


Cheers

30th Jan 2012 15:30 UTCJeff Weissman Expert

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 - http://www.mindat.org/photo-438777.html

30th Jan 2012 16:24 UTCAccount Closed

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.


Fred

30th Jan 2012 20:40 UTCAccount Closed

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

http://www.alpinismeetmineraux.fr/mineralogie/macro/supermacro/supermacro397.jpg

30th Jan 2012 23:55 UTCEugene & Sharon Cisneros Expert

Gentlemen,


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. http://skysurvey.org/


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.


Gene

31st Jan 2012 02:30 UTCKeith A. Peregrine 🌟

What beauty! Frederic and Matteo both of you are artists!!!


Keith

31st Jan 2012 19:28 UTCAccount Closed

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

http://www.alpinismeetmineraux.fr/mineralogie/macro/supermacro/supermacro399.jpg

1st Feb 2012 10:18 UTCChristian Auer 🌟 Expert

Just saw your zoomable rutile Frederic, thats absolutely amazing!

Great job and thanks for sharing!

1st Feb 2012 20:40 UTCAccount Closed

Thanks Christian,


last image 40 Mpix ( and 6 photos stacked)

photo for zooming

http://www.alpinismeetmineraux.fr/mineralogie/macro/supermacro/supermacro401.jpg

1st Feb 2012 21:00 UTCHarjo Neutkens Manager

Le Sagenite est vraiment superbe!

2nd Feb 2012 08:36 UTCChristian Auer 🌟 Expert

Back to topic: Frederic, if you have some spare time then goto a forum where you see experts from whom Harald was talking

http://www.photomacrography.net/forum/


If you search for "stitching" you will find some great ideas like http://www.photomacrography.net/forum/viewtopic.php?t=15322&highlight=stitching


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

2nd Feb 2012 23:54 UTCDebbie Woolf Manager

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.


Debbie

3rd Feb 2012 07:32 UTCAccount Closed

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.

5th Feb 2012 20:27 UTCAccount Closed

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
http://www.alpinismeetmineraux.fr/mineralogie/macro/supermacro/supermacro404.jpg

27th Mar 2012 19:52 UTCAccount Closed

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.

27th Mar 2012 21:51 UTCAccount Closed

Here new photo with the new tube....


difference ?


azurite

http://www.alpinismeetmineraux.fr/mineralogie/macro/supermacro/supermacro457.jpg

30th Mar 2012 16:20 UTCEugene & Sharon Cisneros Expert

Frederic,


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.


Gene

30th Mar 2012 17:46 UTCHarald Schillhammer Expert

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.


Cheers

30th Mar 2012 19:52 UTCAccount Closed

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 !

31st Mar 2012 08:05 UTCHarald Schillhammer Expert

Ah yes, I'm sorry. I didn't take the panorama into account.

31st Mar 2012 10:20 UTCUwe Ludwig

Thank you, Frederic. It’s always a great enjoyment to make a journey through the crystal landscape.


Uwe Ludwig

15th Apr 2012 00:31 UTCAccount Closed

Last generation of HD photo


Big here (42 Mpix)
Image zoomable


and small too
http://www.alpinismeetmineraux.fr/mineralogie/macro/supermacro/supermacro555.jpg

29th Apr 2012 17:54 UTCAccount Closed

I use this technic often now.


An other example here :


small image and a link for the big




Big image here

http://www.alpinismeetmineraux.fr/mineralogie/macro/supermacro/supermacro645.jpg

30th Apr 2012 03:12 UTCRock Currier Expert

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.

9th May 2012 13:23 UTCAccount Closed

Yes,


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.

http://www.mindat.org/xpic.php?fname=0804151001336565431.jpg

28th Jun 2012 17:27 UTCAccount Closed

And last.... this compilation is a 100 Mpixel photo. Good trip :). Size is 60 mm of FOV

A trip in a small world

29th Jun 2012 08:51 UTCRoger Curry

Stunning images Frédéric. Please post more, magnificent work!

Regards,

Rog
 
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