LAPLACIAN_ED_CVIP

laplacian_ed_cvip() - performs a Laplacian edge detection.

SYNTAX
DESCRIPTION
REFERENCE
EXAMPLE
CREDITS

SYNTAX

edge_mag  = laplacian_ed_cvip( input_image, mask_type )

Input Parameters include :

input_image - Input image can be gray image or rgb image of MxN size.

mask_type - Laplacian mask to be used.

                 Type 1 = [0  -1  0;
                           -1  4 -1;
                           0  -1  0];

                 Type 2 = [-2  1  -2;
                            1  4   1;
                           -2  1  -2];

                 Type 3 = [-1  -1  -1;
                           -1  8   -1;
                           -1  -1  -1];

Output Parameters include :

edge_mag - The output after Laplacian operator is applied. An image with the same size as the input image.

DESCRIPTION

This function performs Lapalcian Edge detection operation on an input image. Depending on the mask-type specified by the user, the function convolves each band of the input image with the specified mask-type and outputs the edge detected image.

REFERENCE

1. Scott E Umbaugh. DIGITAL IMAGE PROCESSING AND ANALYSIS: Applications with MATLAB and CVIPtools, 3rd Edition.

EXAMPLE

 %Read image

  input_image = imread('butterfly.tif');

% Mask type

  mask_type = 2;

% Calling function

  edge_mag = laplacian_ed_cvip( input_image, mask_type);

% Display input image

  figure;imshow(input_image);title('Input Image');

% Display output image

  figure; imshow(hist_stretch_cvip(edge_mag,0,1,0,0),[]);title('Output Image');

LAPLACIAN_ED_CVIP

Contents

SYNTAX

DESCRIPTION

REFERENCE

EXAMPLE

CREDITS