HFoV issues of the stitching photos in PTGUI

[Ye CHEN]

To whom it may concerns, 

I have had some issues using PTGUI and just wonder could you help me to figure out what is wrong please?

I have tried to use PTGUI to stitch my panoramic image to 90 degree horizontal field of view, however some of them are coming out at the wrong HFoV when we stitch them. For example, we had some stitch to 8 degrees when we used 6 images. 

When we first downloaded the software and the free trial all of our images were being accurately stitched. After we purchased the software, we take 6-7 photos per panorama, not using a tripod (this didn't cause issues initially), the HFoV of some of the panorama are not coming out quite right. Our HFoV when we pan the camera round is 90 degrees.

It will be very appreciated if you could help me for the above issue.

Many thanks,

Cindy

[PTGui Support]

Hi Cindy,

You should be able to solve the problem as follows:

- Load your images
- Click Advanced
- Go to Optimizer
- Uncheck 'Optimize lens focal length'

Then to Control Points -> Generate Control Points
followed by Project -> Optimize

The problem must be caused by parallax. If you take the photos hand
held, take care to rotate the camera around the so called 'no parallax
point'. For most cameras this is the front of the lens. So you must
rotate the camera around the front of the lens.

If you don't do this, there will be parallax. This not only causes
inevitable stitching errors, but it also causes PTGui not to be able to
estimate the focal length of the lens, which results in the problem you
describe.

If you need further help, please make a set of images available for
download.

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

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[Ye CHEN]

Hi Joost, 

Thank you very much for your reply! It is very helpful!

I have tried your method and it did solve the angle issue. I am also looking to get a standing pole to support the camera so I can rotate the camera around the front of the lens.

Thanks very much again. 

Best regards,

Cindy

[PTGui Support]

The Philopod is also an option:
https://www.philohome.com/tripod/shooting.htm

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

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