hexagon.hvx.erode5x5

R2026b

2-D grayscale erosion with a 5-by-5 square structuring element for HVX

Since R2026a

Syntax

erodeOut = hexagon.hvx.erode5x5(Input)

Description

erodeOut = hexagon.hvx.erode5x5(Input) performs 2-D grayscale erosion of the input matrix Input with a 5-by-5 square structuring element for Hexagon^® Vector eXtension (HVX).

Examples

Compare Image Erosion Using 3x3, 5x5, and 7x7 Kernels

Create a grayscale image with two bright squares.

%% Create a simple binary-style image (uint8)
H = 100; W = 128;              
img = zeros(H, W, 'uint8');
% Draw two white squares
img(30:35, 30:35) = 255;        % Square 1
img(60:65, 80:85) = 255;        % Square 2

To apply erosion to the grayscale image with different kernel sizes, use the hexagon.hvx.erode3x3, hexagon.hvx.erode5x5, and hexagon.hvx.erode7x7 functions.

%% Apply dilation with different kernel sizes
out3 = hexagon.hvx.erode3x3(img);   % 3x3 kernel
out5 = hexagon.hvx.erode5x5(img);   % 5x5 kernel
out7 = hexagon.hvx.erode7x7(img);   % 7x7 kernel

Visualize the original and eroded images.

tiledlayout(2,2,'TileSpacing','compact','Padding','compact');
nexttile
imshow(img, []);  
title('Original Image');
nexttile
imshow(out3, []); 
title('Eroded Image Using 3×3 Kernel');
nexttile
imshow(out5, []); 
title('Eroded Image Using 5×5 Kernel');
nexttile
imshow(out7, []); 
title('Eroded Image Using 7x7 Kernel')

Input Arguments

Input — 2-D input

matrix

2-D input, specified as a matrix whose width is a multiple of 128. The height of the matrix must be greater than or equal to 5.

Data Types: uint8

Output Arguments

erodeOut — Erosion result

matrix

Erosion result of 2-D grayscale erosion on the input matrix.

Version History

Introduced in R2026a

R2026b: QHVXIPCV.erode5x5 function is renamed to hexagon.hvx.erode5x5

The QHVXIPCV.erode5x5 has been renamed to hexagon.hvx.erode5x5.

If your code uses functions from the QHVXIPCV package, update your code to use the corresponding hexagon.hvx function instead.