I was really struggling to accomplish anything with Hugin, before I 
realized the "Simple" interface is harder to use than the "expert".  Maybe 
"Simple" is OK if you did a great job with your tripod making sure every 
photo is from the same axis point.  But I expect you did not.

In the photos tab, you need a good choice for "Geometric".  If you didn't 
do a great job keeping the axis stable, you need to include "translation" 
(x,y, and z).  If you want control points near the corner of any photo to 
do more good than harm, I think you need to include view and Barrel (I'm 
less clear on that, more reporting experience with partial understanding of 
the theory).

I never got the preview to be worth the trouble.  It is very hard to get a 
properly positioned and zoomed image and then the preview isn't accurate 
enough anyway (maybe others can give a better answer to that aspect).

I reviewed control points and improved on the choices made automatically.  
Assuming the "translation" choice was really needed then between photos 
that need translation, control points at multiple distances do more harm 
than good.  I changed the selection of control points so they were all on 
the edges of objects that were about the same distance from the camera (get 
rid of all auto selected control points deep in background).

You may want to try experimenting with fewer images to get used to the 
tool.  When you want to assemble a lot, I'm still learning myself what the 
best approach is.

On Sunday, December 26, 2021 at 4:59:44 PM UTC-5 Jon Schewe wrote:

> I'm piecing together a family tree that I took photos of with the camera 
> on my phone. I made sure to have some overlap across the images so that I 
> could stitch them together later. Now that I'm doing that stitching I'm 
> having a hard time getting a few of the images to line up correctly. 80% of 
> them are correct, but a few are not. In one case 2 images are offset 
> vertically from where they should be. In another case I'm getting 
> duplicated data. In both cases I've found all of the overlapping images and 
> added numerous control points between them. However that doesn't appear to 
> fix things.
>
> I'm sure this is user error as I'm very new to using Hugin. I've read 
> through a few of the tutorials and for the most part things just work, but 
> I'm not sure about the proper workflow for making these changes.
> Currently I do the following:
> 1. add control points
> 2. click optimize
> 3. stitch
> I then check the result and then repeat
> Should I instead be using align instead of optimize? What's the difference 
> between these two operations?
>
> I have 34 images, should I start with just a couple and build up rather 
> than loading all of them at once?
>
> For the projection. I expect that the lens type should be rectlinear. 
> For the output, I'm not sure what is best. Rectlinear doesn't appear to 
> handle the wide image. Equirectangular appears better. I've also tried 
> cylindrical, which handles the size, but curves the lines.
>
> An oddity I've noticed is that the GL preview turns into a blank window 
> for me when making changes. I need to change the interface view and then it 
> shows up.
>
> A minor oddity is that my PNG output files have a PNG offset. When opening 
> in Gimp I get prompted for what to do with this. If I ignore it, the final 
> image is visible, if I use it the image is shifted to one side and much of 
> the image is missing. 
>
> I'm using Hugin version: 2019.2.0.b690aa0334b5 on Ubuntu Linux. I've also 
> tried version 2020.0.0.2f576e5d5b4a installed via Flatpak.
>
> Any and all help is greatly appreciated. If it helps, I can post the 
> images and some of the results on my website.
>
>
> Jon
>
>

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