I think you are being modest. Is there a better explanation somewhere? On Wednesday, 28 April 2021 at 08:18:24 UTC-4 bruno...@gmail.com wrote:
> It still doesn't feel like a particularly good explanation, I have > trouble following it and I wrote it. I thought that maybe the mosaic > mode in the preview overview could be modified to show all the camera > positions in 3d, but then the panotools model allows multiple mosaic > planes (with the plane yaw and plane pitch parameters, yes this is > really hard to visualise), so I don't think this would make anything > clearer, it would just add extra confusion. > > -- > Bruno > > On Mon, 26 Apr 2021 at 14:54, jmuc...@gmail.com <jmuc...@gmail.com> wrote: > > > > Just chiming in to note that an explainer like this would be lovely to > have in docs somewhere, if it isn't already. > > > > On Saturday, 17 April 2021 at 15:31:04 UTC-4 bruno...@gmail.com wrote: > >> > >> The distance from the TrX, TrY, TrZ = 0,0,0 position to the canvas > >> plane is always 1. So if you lock the position of one of the photos > >> to 0,0,0, you can ask the Hugin optimiser to try and find a position > >> for the other photo that agrees with the control points in the > >> project. > >> > >> In the Photos tab you need to select 'custom parameters', and > >> optimise TrX and TrZ of the second photo (assuming that you have set > >> the yaw for this to 48.9 and don't need to optimise it). If this > >> results in a value for TrX of 0.1, given that this equates to 3.6" > >> in real world units, then the distance from the first photo to the > >> canvas plane is 3.6/0.1 = 36". > >> > >> Keep asking if this isn't working for you, this is a legitimate task > >> for Hugin, but it isn't easy conceptually, it would be nice to have > >> a good explanation, diagram or even some code that makes it easier. > > >> On Fri 16-Apr-2021 at 08:41 -0700, SRM wrote: > >> >Hey Bruno, > >> >I really appreciate your help on this. Unfortunately I am not finding > >> >where Hugin will calculate the distance to the projection plane. > >> >I am sorry I have to ask for your assistance again...but how/where do > I get > >> >Hugin to calculate the distance to the anchor image projection plane. > >> > >> >On Friday, April 16, 2021 at 1:43:59 AM UTC-5 bruno...@gmail.com > wrote: > >> > > >> >> You divide the relative coordinates (in inches) by the distance (in > >> >> inches) of the 'anchor' image from the projection plane - this gives > TrX > >> >> etc. values which are unitless. > >> >> > >> >> If you don't know the distance to the projection plane, then Hugin > can > >> >> calculate it for you. Estimate the distance and divide the > coordinates as > >> >> above, then optimise just the TrZ values of all photos in the > project. > >> >> > >> >> On 15 April 2021 22:48:47 BST, SRM wrote: > >> >> >It does make sense. I've been doing just that and am getting close > to what > >> >> >I want to see, but I'd like to be a bit more precise with respect > to this > >> >> >variable. Is there some way I can use the real word physical > >> >> >measurements > >> >> >I do know to calculate the correct offsets to apply to TrX and TrZ > for the > >> >> >1unit sphere projection? Specifically I have a secondary camera > who's > >> >> >entrance pupil was physically located at -3.6" in the TrX direction > and > >> >> > > >> >> >+1.6" in the TrZ direction with a Yaw of 48.9 relative to the > primary > >> >> >camera who's corresponding location and yaw are zero. Isn't there > some sort > >> >> >of formula I can apply to get an accurate TrX and TrZ value that > applies to > >> >> >the 1 Unit Sphere? Perhaps the horizontal view angle of all the > cameras > >> >> >(49.95 deg) would be a pertinent variable in such an equation? > -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to hugin-ptx+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/4599a7b2-396a-4975-bab8-f89d93892a21n%40googlegroups.com.
