Page 1 of 2 12 LastLast
Results 1 to 15 of 27

Thread: RadialShift Camera

  1. #1
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023

    RadialShift Camera

    Hi,

    For Camera + Lens calibrated with Panotools, derived
    external application or compatible abc lens datas,
    I have added a RadialShift Camera (win32 9.2) plugin:
    http://perso.orange.fr/dpont/plugins...ft_Camera.html

    Best regards,
    Denis.

  2. #2
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023
    There is also win64 version compiled by Marvin Landis.

    Denis.

  3. #3
    Thanks for all your hard work Denis!

  4. #4
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023
    Bible Pro is a commercial software with trial version,
    it works also with the same (ASCII) PTLens cal_abc database
    than Hugin, but updated with its own lens calibration:
    http://www.bibblelabs.com/

    Denis.

  5. #5
    Cool! This app has a good list! And the software itself looks nice too... Thanks for the tip.

  6. #6
    Oh yea, do you perhaps know of another software that would allow custom calibration like the "Camera Calibration Tools"? That one seems a bit too unstable...

  7. #7
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023
    Yes have tried also without success and that was
    for my Zhang algorithm experiments which is a bit
    different from the Dersch algorithm.
    Basically Panotools do calibration, but as a step for
    stitching panorama to get rectilinear images before
    assembling, in PTOptimizer but it has a poor java
    interface.
    Hope to find a easier free software and workflow
    for self-calibration.

    Denis.

  8. #8
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023
    Have not image set in my hand to test,
    hugin (Panotools) can load a set of images (we can ignore
    the autopanorama request), add control points
    between each pair of image and run an auto-optimizer program
    for outputting a, b & c distorsions, except we don't need
    positions for stitching.

    On the PTLens (Panotools also) site there a sample
    for target image (menu->Calibration->Target):
    http://epaperpress.com/ptlens/

    This is different than Calibration Toolbox, no grid frame,
    large distance (a building), edge to edge lines, only half
    of the image for control points, but not automatism here
    and I suppose this requires a lot of points for accuracy.

    Denis.

  9. #9
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023
    Correcting lens distortion with PTGui by Erik Krause:
    http://www.erik-krause.de/index.htm?...distort_en.htm
    PTGui (commercial and trial) is the application used to build the
    PTLens database:
    http://www.ptgui.com/

    Denis.

  10. #10
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023
    Note:
    The Krause's polynomial abc for Canon EF 17-35 mm:
    cal_abc: 17 0.014716 -0.030299 -0.023392
    and PTLens database:
    cal_abc: 17 0.020618 -0.051946 0.000000
    are different, but compared results in RadialShift Camera
    for both abc and Real Lens Camera are not so far.

    Denis.

  11. #11
    Ahh great! Now those a b c make sense... I've been using Ptgui and Hugin and never gave it much consideration... Finaly I can match LW camera with it seems

  12. #12
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023
    Have fixed the (random) issue that crashed clearing/exiting Layout
    with a mix of RadialShift and LW Cameras (win32).
    http://perso.orange.fr/dpont/plugins...ft_Camera.html

    win64 version will be updated later.

    Denis.

  13. #13
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023
    Win64 has been updated too.

    Denis.

  14. #14
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023
    RadialShift Camera (x32) has been updated,
    since the setup of a calibrated zoom with envelopes
    could be a tedious task,
    I have added preset functions with comment option.
    Click image for larger version. 

Name:	RadialShift_Presets.jpg 
Views:	579 
Size:	114.6 KB 
ID:	49582

    http://perso.orange.fr/dpont/plugins...ft_Camera.html

    Denis.

  15. #15
    Member
    Join Date
    May 2006
    Location
    France
    Posts
    4,023
    The RadialShift Camera has been updated,

    -Improved accuracy in the distorsion algorithm,
    previous saved camera in presets or scenes will have a slightly
    different radial distorsion,
    but now it should match LW Real Lens cameras with
    same (a, b and c ) lens profiles.

    -"Irradiance falloff" has been improved, it is better smoothed,
    shoukd match also LW Real Lens cameras with same value.
    -Removed the "Distorsion Mapped by" choice, it is now always
    evaluated per focale.

    Click image for larger version. 

Name:	Nikon4500.jpg 
Views:	361 
Size:	63.2 KB 
ID:	69429

    -Added a "Load Lens Profile File" button for loading directly
    lens profiles from a text file.

    Click image for larger version. 

Name:	lensprofile.gif 
Views:	332 
Size:	2.4 KB 
ID:	69430

    -Camera name and comment are now saved with scene.

    updated x32 version available here,
    http://pagesperso-orange.fr/dpont/pl...ft_Camera.html





    In case someone would be interested by calibrating
    a unlisted camera+lens, studying the process
    for adding a new lens profile in the PTLens database,
    to get "abc" for RadialShift Camera.
    Some links to PTLens site,
    http://www.epaperpress.com/ptlens/index.html

    Calibration overview,
    http://www.epaperpress.com/ptlens/calOverview.html
    Actual profile list,
    http://www.epaperpress.com/ptlens/profile.html






    Denis.
    Last edited by dpont; 02-06-2009 at 05:53 AM.

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •