Method from_slice

src/opencv/mod.rs:553–572

(v: &[u8], rows: usize, cols: usize)

    }

    pub fn from_slice(v: &[u8], rows: usize, cols: usize) -> Option<GrayImage> {

        if rows * cols != v.len() {
            return None;
        }

        let siz = CvSize {
            width: cols as c_int,
            height: rows as c_int
        };
        // TODO background
        let mut dst = GrayImage { iplimage: unsafe { cvCreateImage(siz, 8, 1) } };
        
        for y in (0..rows) {
            for x in (0..cols) {
                dst.set_pixel(x, y, *v.get(y * cols + x).unwrap());
            }
        }
        Some(dst)
    }

    pub fn from_raw(image: *const IplImage) -> GrayImage {