Can't create WarperCreator and use StitcherTrait::set_warper

[markhilb]

I am trying to stitch a panorama using the Sitcher struct with the warper: TransverseMercatorWarper.
However, the StitcherTrait::set_warper method takes in a Ptr<WarperCreator> which I can't seem to create,
since neither TransverseMercatorWarper nor WarperCreator has a new/create method.

Here is some example code showing the problem:

use opencv::{
    core::{Mat, Vector},
    imgcodecs::{imread_def, imwrite_def},
    stitching::{Stitcher, StitcherTrait, Stitcher_Mode},
    xfeatures2d::SURF,
};

pub fn stitch(files: Vec<String>) -> anyhow::Result<()> {
    let mut images = Vector::<Mat>::with_capacity(files.len());
    for f in files {
        images.push(imread_def(&f)?);
    }

    let mut stitcher = Stitcher::create(Stitcher_Mode::PANORAMA)?;

    let surf = SURF::create_def()?;
    stitcher.set_features_finder(surf.into())?;

    // What goes here?
    let warper = todo!();
    stitcher.set_warper(warper)?;

    let mut output = Mat::default();

    stitcher.stitch(&images, &mut output)?;
    imwrite_def("result.png", &output)?;
    Ok(())
}

In c++ the missing part would be written like this:

  auto warper = makePtr<cv::TransverseMercatorWarper>();
  stitcher->setWarper(warper);

Any idea how to create the warper in rust?

[twistedfall]

Looks like currently it's not possible to create an instance of the necessary warper. I'm going to look into this, thanks for the report!

[twistedfall]

Can you please check the rel branch to see it the following now works as expected:

    // What goes here?
    let warper = Ptr::new(TransverseMercatorWarper::default());
    stitcher.set_warper(warper.into())?;

[markhilb]

Yes, that works great!

[twistedfall]

Perfect, I will release the version with the fix shortly

[twistedfall]

This has been released as part of 0.90 version