Feature Request: converting to Vec<u8> or &[u8] or Vector<u8> for tesseract

[JulianWogersien]

The set_image_from_mem function in https://crates.io/crates/tesseract takes a &[u8].

[JulianWogersien]

if you must know, i tried to use the .data_typed function but i just get a pixReadMem error saying that the format is unknown and no pix was returned. this is a sample of the code i used the code i used

    let image = opencv::imgcodecs::imread("file.png", opencv::imgcodecs::IMREAD_COLOR).unwrap();
    
    let img: &[u8] = image.data_typed::<u8>().unwrap();

    let mut tess = Tesseract::new(None, Some("eng")).unwrap();
    tess = tess.set_image_from_mem(img).unwrap();