Sobel Operators. More...

Functions

AFAPI void sobel (array &dx, array &dy, const array &img, const unsigned ker_size=3)
 C++ Interface for extracting sobel gradients. More...
 
AFAPI array sobel (const array &img, const unsigned ker_size=3, const bool isFast=false)
 C++ Interface for sobel filtering. More...
 
AFAPI af_err af_sobel_operator (af_array *dx, af_array *dy, const af_array img, const unsigned ker_size)
 C Interface for getting sobel gradients. More...
 

Detailed Description

Sobel Operators.

Sobel operators perform a 2-D spatial gradient measurement on an image to emphasize the regions of high spatial frequency, namely edges. A more in depth discussion on it can be found here.


Function Documentation

◆ af_sobel_operator()

AFAPI af_err af_sobel_operator ( af_array dx,
af_array dy,
const af_array  img,
const unsigned  ker_size 
)

C Interface for getting sobel gradients.

Parameters
[out]dxis derivative along horizontal direction
[out]dyis derivative along vertical direction
[in]imgis an array with image data
[in]ker_sizesobel kernel size or window size
Returns
AF_SUCCESS if sobel derivatives are computed successfully, otherwise an appropriate error code is returned.
Note
If img is 3d array, a batch operation will be performed.

◆ sobel() [1/2]

AFAPI void af::sobel ( array dx,
array dy,
const array img,
const unsigned  ker_size = 3 
)

C++ Interface for extracting sobel gradients.

Parameters
[out]dxis derivative along horizontal direction
[out]dyis derivative along vertical direction
[in]imgis an array with image data
[in]ker_sizesobel kernel size or window size
Note
If img is 3d array, a batch operation will be performed.
Examples
image_processing/edge.cpp, image_processing/filters.cpp, and image_processing/gradient_diffusion.cpp.

◆ sobel() [2/2]

AFAPI array af::sobel ( const array img,
const unsigned  ker_size = 3,
const bool  isFast = false 
)

C++ Interface for sobel filtering.

Parameters
[in]imgis an array with image data
[in]ker_sizesobel kernel size or window size
[in]isFast= true uses \(G=G_x+G_y\), otherwise \(G=\sqrt (G_x^2+G_y^2)\)
Returns
an array with sobel gradient values
Note
If img is 3d array, a batch operation will be performed.