Different images size

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VR2Planets

• November 10, 2017 14:45

Dear RC addicts,

I am trying to align efficiently images from MSL Curiosity (the present martian rover)
I am using 3 kind of images:

1. Low def images: B&W images (256x256 px) recolorized, fov 45x45°
2. mid def images: B&W images (1000x1000 px) recolorized
3. Hi def images : Color Images (1200x1200 px)

For mid def images, here are available information:

• Pixel scale at the center of the FOV 0.82 mrad/pixel
• Focal Length 14.67 mm
• f/number 12
• Entrance Pupil Diameter 1.25 mm
• Field of View (horizontal × vertical) 45 × 45 degrees 
• Diagonal FOV 67 degrees
• Depth of Field 0.5 meters–infinity
• Hyperfocal Distance 1.0 meters
• Spectral Range 600–800 nm

Low def images are obtained from the same camera which are downsampled

 

High def images are dual:

• 34 mm focal length // 100 mm focal length
• f/8 lens illuminating a 15° FOV // f/10 lens square fov of 1200x1200px

I am trying to align but it makes some strange things... images appear to be as on a sphere:Does someone could help to configure properly RC or to process efficiently images? 

In the same way, I am trying to define camera sensor info, but I did not succeed yet...

Many thanks in advance,

F

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  Götz Echtenacher

  • November 10, 2017 17:24

  Hi Francois,

  is this a fish-eye lens you are talking about? Because that can be difficult.

  You might try a different distortion model (brown 4 or I think division might be specifically for fish-eye lenses).

  Have you tried to delete all components and re-align from scratch?

  Also, when you say re-colorised, what does that mean? Since RC relies on RGB information, I am not sure that it will work like that.

  If it is possible for you to share some images, I could take a look...

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  VR2Planets

  • November 13, 2017 10:22
  • Edited

  Hi Götz,

  Thank you for your aswer.

  It's not a fisheye, but your rigth to talk about that, as the result seem to be as if images were in this format.

  RC uses RGB information? I didn't know... I recolorized using a mean of spectral RGB distribution 

   

  Here are some images samples for each kind

   

  High def color (I've just reduce the size of the image)

  

   

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  VR2Planets

  • November 13, 2017 10:21
  • Edited

  Low def B&W recolorized

  

  Mid def B&W recolorized

  
  
  

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  Götz Echtenacher

  • November 13, 2017 10:31

  Yes, definitely RGB, or rather color in general.

  But it might still work.

  I asked about a fisheye because I think the error did occur with those before.

  Have you tried to re-run everything?

  My offer still stands...

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  VR2Planets

  • November 13, 2017 10:37

  Ok I try to re-run everything with these settings, do you think it's ok?

  

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  VR2Planets

  • November 13, 2017 10:38

  I can share you images, contact me at contact[at]vr2planets.com

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