How to convert Canny to rgba for canvas drawing?

Question

How to convert Canny to rgba for canvas drawing?

tetap opened this issue 2 years ago · comments

Tetap · Answer 1 · Sat Oct 22 2022 11:13:57 GMT+0800 (China Standard Time)

I tried to save the image, but it looks like this

I tried to save the image, but it looks like this

Here's my code

    use imageproc::edges::canny;
    let image = ImageBuffer::from_raw(width, height, data.clone()).unwrap();
    let edges = DynamicImage::ImageLuma8(canny(&image, low_threshold, high_threshold));
    edges.save("img/result/test.jpg").unwrap();
    data.clone()

The final result did not agree with my expectation

Tetap · Answer 2 · Sat Oct 22 2022 11:17:34 GMT+0800 (China Standard Time)

This is what I got using OpenCV, and obviously he got the right edge.

Tetap · Answer 3 · Sat Oct 22 2022 11:30:52 GMT+0800 (China Standard Time)

I'm sorry it's my fault, but canny I can't control the SIGMA value of gaussian_blur_f32. Can only be solved by modifying the source code.