Question: How to initialise Mat

[augustocdias]

How do initialise the Mat with ones or zeros like in C++ API?

Mat::zeros(3, 3, CV_32F);

[twistedfall]

It turned out that MatExpr generation was largely broken, it's fixed now in 0.19.3. You can now use zeros method:

let zero_mat = Mat::zeros(3, 3, f32::typ())?.to_mat()?;

[phunehehe]

I wonder if there's a way to make to_mat easier to discover. Now knowing it, I can see that MatExpr implements MatExprTrait which has to_mat. But when I was looking for it a bit earlier I couldn't find it. In any case, thanks for pointing out. This works!

[Tramac]

It turned out that MatExpr generation was largely broken, it's fixed now in 0.19.3. You can now use zeros method:

let zero_mat = Mat::zeros(3, 3, f32::typ())?.to_mat()?;

let measurement_noise_cov = Mat::ones(2, 2, CV_32F)?.to_mat()?;

[twistedfall]

Please make sure to import prelude:

use opencv::prelude::*;