STITCHING PROBLEM

[samcbvi]

Hey Guys,

I am a beginner to PTGui. I have been stitching together a couple of 360 Panos, however I have stumbled across a slight problem. 

As you can see in the image attached there is a gap between the two stitches. Why aren't they joined up? I took it with my DJI Mavic Air 2S on the 360 mode, capturing all and every point ready for the stitching process. On other 360's I haven't had this problem and the full Panorama Editor viewer would be full, ready for export.

Do I have to manually attach both of them together?

Many thanks,

Sam

[John Houghton]

Sam,  What you are seeing is just one stitch, not two.  You need to remember that this is a 360 degree view and the right and left hand edges are in reality joined to form one continuous panorama.  To explain the gap, you could visit the Control Point Assistant (on the Tools menu).  That may indicate that there are clusters of images.  All the missing images may be aligned together as one group or cluster but positioned somewhere behind the visible stitch with no control points linking any of the missing images to any of the visible images.  If so, the remedy is obvious  -  create some additional control points to link the two clusters together.  Then run the optimizer.

Another thing you could try is turn on the image numbers so you can see where each image is positioned.  The numbers should be in some sort of pattern that was used in shooting the images (rows and columns).  That should enable you to see where the missing images are.  But maybe they are simply not all there.  Check the thumbnail images on the source images tab to verify all expected images are present in the project.

John

[samcbvi]

Hey John,

Many thanks for getting back to me. Once I’m back at the computer later on I’ll be getting right on this and get back to you on how it goes!

Thanks again,

Sam

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[samcbvi]

Hi John,

Looking through the photos I have realized:

There are actually missing photos for the certain section of the image which isn't joined. I am not sure why that is. Have you heard of other DJI 360's missing out on small sections during the photo process (in flight)? 

I took others on the same day and it has allowed me to have a full 360 view. Strange.

I have a couple more questions.

1. Once I have the final 360 (which I can view on PTGui viewer), how do I embed it onto a website. Similar to my matterports, I simply have to embed a link and it will be there. However, not everyone will have the PTGui viewer. Is there another application which would help me do this? If so, which ones?

2. I also took a couple of 180 panoramas. When I look at these, the corners are stretched - not in the central image. Another problem is that I end up filling in the central bottom/top of the image which causes small 'blobs' (else there are black unphotographed areas). I have cropped these images (in the PTGui photo editor) so that there are no top and bottom 'blobs', but that defeats the purpose of taking a 180 pano - this does not fix the stretching in the corners. With the 180 degree panos, I have it in the 'rectilinear projection' option.

Many thanks on the help,

Sam

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[John Houghton]

On Thursday, October 21, 2021 at 10:28:16 PM UTC+1 sam...@gmail.com wrote:

I have a couple more questions.

1. Once I have the final 360 (which I can view on PTGui viewer), how do I embed it onto a website. Similar to my matterports, I simply have to embed a link and it will be there. However, not everyone will have the PTGui viewer. Is there another application which would help me do this? If so, which ones?

Sam, please see FAQ at:  https://www.ptgui.com/support.html#6_15

 

2. I also took a couple of 180 panoramas. When I look at these, the corners are stretched - not in the central image.

Another problem is that I end up filling in the central bottom/top of the image which causes small 'blobs' (else there are black unphotographed areas). I have cropped these images (in the PTGui photo editor) so that there are no top and bottom 'blobs', but that defeats the purpose of taking a 180 pano - this does not fix the stretching in the corners. With the 180 degree panos, I have it in the 'rectilinear projection' option.

The stretching effects in the corners are characteristic of the rectilinear projection for angles of view >120 degrees approximately.  See FAQ at https://www.ptgui.com/man/projections.html .

 

John