Control Points and Image Resolution...

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    Wishgranter
    Hi Tony Scamurra

    Easy way to solve this :-D Just add more images to the CP, that means have at least 3 images per CP and per COMPONENT. So for one CP you need at least 6 projections-images + spread them over the image like in my tutorial on this: https://www.youtube.com/watch?v=d8naLEtLqDY
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    Lucia CR
    Tony Scamurra wrote:
    When I set control points on the camera images and matching points on my drone images, nothing happens when I perform a re-align.

    You mean this does not result in registration of more cameras in new component(s) at all?

    Tony Scamurra wrote:
    1) Could this be because of the resolution difference?

    This should not be a problem.

    Tony Scamurra wrote:
    2) I have ~4 CP's on 3 or 4 different images, is that enough?

    It is recommended to define at least 2 CPs in 2-5 images.

    Tony Scamurra wrote:
    3) Does the position of the CP's matter? I mostly tried to make the points on the corner of windows, edge of the roof or edges of steps, etc.

    Of course, it matters. They need to be placed as precisely and correctly as possible.

    Tony Scamurra wrote:
    4) Can I set a CP on one image in component 2 (camera images) and then keep that image open and make the same CP on 3 or 5 other images from Component 1 (drone images)? Component 2, 3 and 4 are my camera images, Component 1 is the 100+ drone images that render ok.

    Yes, you can place the same CP on any project images. That is the point of doing it.

    Tony Scamurra wrote:
    5) Periodically I also saw a red triangle on a couple of the images, but did now know why it was there, or what I did to get it to appear. Why does this appear?

    The red triangle appears when you exceed the so-called "max feature reprojection error" set in the alignment settings.

    Tony Scamurra wrote:
    6) I read somewhere that the yellow triangle was ok. I believe this show up because I have no exif data on the photo, is that correct?

    See: Yellow triangle with an exclamation mark. More in the application Help coming out in the upcoming days.

    Tony Scamurra wrote:
    I have watched a couple tutorial videos, but I still cannot get any points to match so I must be missing something. I did try to lower the resolution on the camera images to match the drone and one of my tests did remove a component set, but I could not get any other images to align.

    To merge components you have 2 options - add control points or more images - the latter is usually the faster way to do it.
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