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Comments on Gigapan: Corcovado 67GP (first stitch)

Gigapan Comments (47)

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  1. Luiz Velho

    Luiz Velho (August 22, 2010, 01:25PM )

    Reflections on the Limits of Resolution in Digital Photography - www.visgraf.impa.br/Data/RefBib/PS _PDF/rlp10/resolution-limits-aug2010.pdf Will open in
a new tab or window

  2. Stoney Vintson

    Stoney Vintson (July 31, 2010, 01:15PM )

    Those are probably the most similar lenses that were available. You can buy a CF adapter to use V series lenses on an H series body. I would use a Zeiss V series lens with a CF adapter on an H series body. Personally I want to use Contax 645 bodies and Zeiss lenses with P65 backs. Though I may be able to get two PhaseOne bodies ( made by Mamiya ) for PhaseOne which concentrates on making great digital backs.

  3. Bradford Bohonus

    Bradford Bohonus (July 31, 2010, 12:16PM )

    @Castillonis, yes I realize why the two cameras- rather it's the two lenses of two different focal lengths that were used simultaneously that puzzles me I guess.

  4. Stoney Vintson

    Stoney Vintson (July 31, 2010, 10:28AM )

    They used more than one camera in order to reduce mismatches between photographs due to a subject that moves. ( The 150mm Hasselblad is not as good as the 120mm macro or the 300mm ) I have used a prototype that can hold six point and shoot cameras. I have been told by Holger that Clauss has an imager that can hold four Canon 500mm f/4.0 lenses. Lionel from Kolor said that it can hold two 600mm f/4.0 lenses. I have used the Canon 500mm f/4.0 and it is an excellent lens. Though a PhaseOne p65 digital back and a telephoto would be better. Especially the increase in dynamic range and lower noise. ( The pixels / cm^2 ) The lenses are amazing.

  5. Bradford Bohonus

    Bradford Bohonus (July 31, 2010, 09:59AM )

    @Castillonis, There is a gigapixel shot at the Glastonbury 2010 festival for Orange which was created using two Hasselblad H4D-50 cameras. They used two different lenses though- 150mm on the top camera and a 100mm lens with tilt shift adapter on the bottom. Not sure exactly why the two lenses but the results are really nice. The Facebook angle regarding tags is an interesting feature as well. You can can check it out here: www.allfacebook.com/2010/07/orange -uses-facebook-to-power-giga-pixel-photo Will open in
a new tab or window/

  6. Bradford Bohonus

    Bradford Bohonus (July 31, 2010, 09:52AM )

    Yes, I saw online that Luiz spent time at MS Research and thought he might. I know Michael (& Matt) as well, as I live in Seattle. They have had so many things "on the stove" so to speak in relation to this type of photography. It is a nice to see work done in this area to address these issues. I do many high-resolution infrared panoramas with my scanning back camera and would sure like to see/find more research related to combining these images with those shot normally to make use of infrared's ability to capture such fantastic detail over great distances without effects of haze etc. know any?

  7. Stoney Vintson

    Stoney Vintson (July 31, 2010, 09:42AM )

    If possible, you need to use a different lens than the Canon 100-400mm f/4.0. The vignetting is extreme at 400mm. The Canon or Nikkor 300mm f2.8 lenses exhibit much less vignetting. Read Pablo D'Angelo's presentation on vignetting. hugin.sourceforge.net/tech/icvs200 7_presentation.pdf Will open in
a new tab or windowKolor demonstrated an implementation for haze removal at the April 2010 IVRPA conference in Tucson. It uses a different method, but is similar to the Kaiming Hei paper that uses single images and a depth map. research.microsoft.com/en-us/um/pe ople/jiansun/papers/dehaze_cvpr2009.pdf Will open in
a new tab or windowI believe that Kolor used the dehaze filter on their Paris 26 gigapixel image. Hopefully they will start to sell it soon. I use a LCDVF viewfinder and live view to attain much better focus. This is a huge improvement. www.amazon.com/LCDVF-LCD-Viewfinde r-Digital-Cameras/dp/B003A2BU5E/ref=sr_1_1?ie=UTF8 &s=electronics&qid=1280596645&sr=8-1&n bsp;Will open in a new tab or windowYou should plan to do captures in the morning when the temperature is lower and there is less thermal energy in the atmosphere. Also, you can use a second camera to continually shoot a digital calibration target during the time of the capture. This would allow you to adjust each row or section of a row for changes in exposure and white balance. I learned from my project in San Francisco to never capture in the afternoon when large distances are involved. There is a new autofocus feedback mechanism in the new firmware, but it is not a panacea for those who do not know how autofocus works. Manual focus with a viewfinder is always better, but it takes time. Unfortunately I have more difficulties with Nikon live view and magnified viewfinders. Currently the Canon display of live view works better This composition is good, but for other large gigapans, it would be best if people think about composition before starting capture. Once you start to capture a large panorama it is difficult to think about composition because you are focused on the capture. In the future, I plan to capture large panoramas with more than one imager and use medium format cameras. I am considering using multiple PhaseOne P65 digital backs that can capture at a rate of one photo per second. This sensor is twice as large as a full frame DSLR and has much better dynamic range. Also, the lenses are sharp from corner to corner

  8. Rodolfo Lima

    Rodolfo Lima (July 31, 2010, 05:13AM )

    Thanks Bohonus. Luiz Velho happens to know Neel and Michael (and met the latter at SIGGRAPH 2 days before). This paper has great results and I look forward to implement it as a pass in our stitcher software.

  9. Bradford Bohonus

    Bradford Bohonus (July 30, 2010, 02:51PM )

    @rodlima You may find this document regarding techniques for haze-reduction/removal in photographs written by Neel Joshi and Michael Cohen at MS Research of interest (if you haven't seen it already). research.microsoft.com/en-us/um/pe ople/cohen/SeeingMtRainier.pdf Will open in
a new tab or windowregards, b

  10. Rodolfo Lima

    Rodolfo Lima (July 30, 2010, 02:30PM )

    @bohonus: that's exactly our approach. Thanks for your support.

  11. Bradford Bohonus

    Bradford Bohonus (July 30, 2010, 01:02PM )

    Hi rodlima, If people don't create images like this and others to begin with, how else is one to expose and address issues like the ones you have mentioned you are doing, don't you agree? "Never try, never do" and "never did, never done" right? :) Personally, I think once one gets comfortable with the techniques and processes and can reduce or eliminate issues during such, then the road is wide open for even more creative expression within the medium.

  12. Rodolfo Lima

    Rodolfo Lima (July 30, 2010, 06:53AM )

    @bohonus: as I said earlier, gigapan's viewer stretches the most detailed image 3x (or so), so no matter what panorama you view with it, the higher resolution level will appear blurred. But he has a point, it's somewhat easy to come up with a gigapixel panorama nowadays, it's a matter of having a good equipment (mostly). The bottleneck is during post-processing. Autopano *crawls* with 60GP, let alone higher resolutions, and this is using linear blending. It's almost impossible with multiband blending or smartblend. But we're working on software solutions to overcome these issues, just wait and see :)

  13. Bradford Bohonus

    Bradford Bohonus (July 29, 2010, 05:27PM )

    Nice going! Must have been a fun image to shoot and work on! & a wonderful location too! The commentary/rant/insults posting about this shot and the people who worked so hard on it from Mr Martin @ 360cities are way out of line in my opinion- blog.360cities.net/gigapixel-charl atans Will open in a new tab or window/

  14. Rodolfo Lima

    Rodolfo Lima (July 28, 2010, 07:54AM )

    @zmalol: the focus was fixed, that was a constraint of the 2x multiplier used. But yes, focus could (and will) be improved next time. But other factors are involved too: atmospheric condition (hot air causing distortions, etc), thermal noise on CCD and most importantly: gigapan most detailed view is stretching the original image 3 times (or so), so there's upsampling artifacts (blurring).

  15. Zbigniew

    Zbigniew (July 27, 2010, 10:12PM )

    How about lens focus? Was it locked during shooting? Reason for this question is that some parts of the panorama seems to be out of the focus in the nearest and farthest range (see two snapshots at the max zoom gigapan.org/gigapans/54825/snapshot s/154327/ and gigapan.org/gigapans/54825/snapshot s/154328/). In most gigapans at max zoom there is more details available. For me this brings the issue (perhaps discussed already) of lens performance for large multithousandshot gigapans.

  16. Giga Works

    Giga Works (July 26, 2010, 03:41AM )

    Very well done!

  17. The Rio de Janeiro - Hong Kong Connection

    The Rio de Janeiro - Hong Kong Connection (July 25, 2010, 07:17PM )

    @Texas_Photo: Yes, we hope to do some large ones of HK as well!

  18. The Rio de Janeiro - Hong Kong Connection

    The Rio de Janeiro - Hong Kong Connection (July 25, 2010, 07:16PM )

    @AutoMateUser: Thanks! Yes, we plan to put together a more detailed description of the picture capture and stitching process once we address the remaining exposure issues. It took a few hours to take the photos (about 45 images per minute in GigaPan's fastest mode) and we used autopano giga for this first stitching attempt. It took multiple days to complete. :) Cheers.

  19. David Engle

    David Engle (July 25, 2010, 10:38AM )

    Congratulations on the Rio GigaPan :) When will we see panoramas this size taken of Hong Kong? GigaPans of HK taken from the Peak and taken from Kowloon would quickly end up on the first page of most popular GigaPans.

  20. Jean Turco

    Jean Turco (July 25, 2010, 02:20AM )

    Superbe ! Félicitations - Jean