MATLAB Examples

## Contents

```function demoImChamferDistance(varargin) ```
```%DEMOIMCHAMFERDISTANCE computes distance function inside a complex particle % % output = demoImChamferDistance(input) % % Example % demoImChamferDistance % % See also % % % ------ % Author: David Legland % e-mail: david.legland@grignon.inra.fr % Created: 2010-08-02, using Matlab 7.9.0.529 (R2009b) % Copyright 2010 INRA - Cepia Software Platform. ```

## Read image a create marker

```% read image img = imread('circles.png'); % create marker marker = false(size(img)); marker(80, 80) = 1; % show image imshow(imOverlay(img, imdilate(marker, ones(3, 3)))); ```

## compute using quasi-enclidean weights

```% compute distance map dist = imChamferDistance(img, marker); % convert to rgb (use function in 'imFilters') rgb = double2rgb(dist, jet, [], [1 1 1]); % display result figure; imshow(rgb); % decorate title('Quasi-euclidean distance'); ```

## compute using integer weights, giving integer results

```% compute distance using integer weights dist34 = imChamferDistance(img, marker, int16([3 4])); % convert to double and normalize dist34d = double(dist34); dist34d = dist34d / 3; dist34d(~img) = inf; % convert to RGB bounds = [0 210]; rgb34 = double2rgb(dist34d, jet, bounds, [1 1 1]); % display rgb figure; imshow(rgb34); % decorate title('Borgefors 3-4 weights'); ```