imfilter

Syntax

h = imfilter(data, filter)

h = imfilter(data, filter, method)

Inputs

data

Data on which linear filtering is applied. Must be a real, non-sparse 2 dimensional or multi-dimensional matrix.

Type: matrix

filter

Linear filter. Must be a real, non-sparse 2 dimensional matrix.

Type: matrix

method

Method used to apply the filtering. Valid values are 'corr'(default) and 'conv'. 'corr' applies the filter using correlation and 'conv' applies the filter using convolution.

Type: string

Outputs

h

Filtered image data.

Type: matrix

Example

Apply a Gaussian filter using convolution:

close all;
linearfilter = fspecial('gaussian', 3, 0.5);
handle = imreadcv('imfilter_1.png');
data = getcv(handle);
filteredimage = imfilter(data, linearfilter, 'conv');

figure(1);
imshowcv(data);

figure(2);
imshowcv(filteredimage);

Figure 1. Original image

Figure 2. Filtered image