Troubling results with wide-angle lenses

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    martinb
    Hi Brennmat,

    the result depends on the selected lens model and how image features are distributed in images. If the scene is like a single linear path (without scene loop), then cameras tend to drift. Camera grouping helps there a lot. By default PS groups camera parameters.

    Try grouping camera parameters. Open 1Ds view, click "images" root and click "group" by EXIF in the Inputs panel.
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    brennmat
    martinb wrote:
    Hi Brennmat,

    the result depends on the selected lens model and how image features are distributed in images. If the scene is like a single linear path (without scene loop), then cameras tend to drift. Camera grouping helps there a lot. By default PS groups camera parameters.

    Try grouping camera parameters. Open 1Ds view, click "images" root and click "group" by EXIF in the Inputs panel.


    Thanks Martin, I'll give that a try.
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    Ben Kreunen
    Brown4 does a reasonable job for a full frame fisheye but the accuracy may drop off rapidly near the edges if you're starting from "unknown". I've been having a bit more success using "Division" for the initial alignment (with Max reprojection error = 2) and then switching to Brown4. This has been producing better results for me than starting with Brown4 and Max reprojection error = 8

    Have a look at some of the images in a 2D pane and enable the display of tie points. If you don't have any tie points near the edges it's likely that the distortion parameters are a bit out and you're seeing a sudden rise in reprojection error (thus excluding the tie points).
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