Distorted poles help.

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capirossi
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Joined: Tue Dec 09, 2008 5:36 am

Distorted poles help.

Post by capirossi » Tue Dec 09, 2008 8:31 am

I stiched my panorama using ptgui and export it as esquirerectangular. When i try to convert using pano2qtvr both my pole up and down image kind of gives me distorted poles - it looks like it pulls inwards too much of the image, and squeezes it. I stich wihtout both up and down poles and i leave it as a hole.

My question is is there posible to do the cubis conversion without Pano2qtvr trying to push pixel to fill in the holes?

Thank you.

Regards,
Ben
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smooth
Posts: 1493
Joined: Sat Sep 09, 2006 7:30 pm

Re: Distorted poles help.

Post by smooth » Tue Dec 09, 2008 9:26 am

This should not happen if you are to flatten your image (no layers) and allow the nadir hole to fill with background colour.
Understand that you must have an equirectangular image of exactly 2:1 aspect ratio. (twice and wide as it is tall to the pixel)

Regards, Smooth 8)
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capirossi
Posts: 14
Joined: Tue Dec 09, 2008 5:36 am

Re: Distorted poles help.

Post by capirossi » Tue Dec 09, 2008 10:30 am

sorry I dont get it. I must have missing something but in ptgui I export the image in jpeg format meaning everything is flaten.

capirossi
Posts: 14
Joined: Tue Dec 09, 2008 5:36 am

Re: Distorted poles help.

Post by capirossi » Tue Dec 09, 2008 10:48 am

here is my panorama. Thanks!
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smooth
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Re: Distorted poles help.

Post by smooth » Tue Dec 09, 2008 3:02 pm

You must be using "auto crop" feature in PTGui. Do not use this. You should have black lines at the top and bottom of the image to complete the 2:1 aspect ratio.
Image must be equirectangular 360x180.

Feed this version the Pano2qtvr

Image
Right click save as. (I'm not sure why it doesn't show the full image in the forum?)

Regards, Smooth 8)
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360Texas
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Re: Distorted poles help.

Post by 360Texas » Tue Dec 09, 2008 9:10 pm

top one was taken with a fisheye lens, stitched as a spherical, cropped to 2000 x 722 pixels cylinder and is being display as a spherical image (minus the black top and bottom BLACK area. The spherical display viewer attempts to sphericalize the bottom and top by "pinching" the image. Common error when attempting to remove the black area. I did it 1 time 7 or 8 years ago. Large missing black areas caused by using the Sigma 8mm lens with the lens cap ring in place (lens cap has 2 pieces ring/cap). OR its was taken with a Nikon 10.5 or similar full frame fisheye lens... and needed 6 on the horizon + 1 up and 1 down image to fill in the black areas.

But I am only guessing.
Dave
Pano2VR Forum Global Moderator
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capirossi
Posts: 14
Joined: Tue Dec 09, 2008 5:36 am

Re: Distorted poles help.

Post by capirossi » Wed Dec 10, 2008 4:07 am

I love you smooth!

Ding ...Dave you are almost right!

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