Function arrayfire::canny[−][src]

pub fn canny<T>(
    input: &Array<T>, 
    threshold_type: CannyThresholdType, 
    low: f32, 
    hight: f32, 
    sobel_window: u32, 
    is_fast: bool
) -> Array<bool> where
    T: HasAfEnum + EdgeComputable, 

Canny edge detection operator

The Canny edge detector is an edge detection operator that uses a multi-stage algorithm to detect a wide range of edges in images. A more in depth discussion on it can be found here.

Parameters

  • input is the input image
  • threshold_type helps determine if user set high threshold is to be used or not. It can take values defined by the enum CannyThresholdType
  • low is the lower threshold % of the maximum or auto-derived high
  • hight is the higher threshold % of maximum value in gradient image used in hysteresis procedure. This value is ignored if CannyThresholdType::OTSU is chosen.
  • sobel_window is the window size of sobel kernel for computing gradient direction and magnitude.
  • is_fast indicates if L1 norm(faster but less accurate) is used to compute image gradient magnitude instead of L2 norm.

Return Values

An Array of binary type DType::B8 indicating edges(All pixels with non-zero values are edges).