Documentation

Image Filtering

Convolution and correlation, predefined and custom filters, nonlinear filtering, edge-preserving filters

Functions

imfilter N-D filtering of multidimensional images
imgaussfilt 2-D Gaussian filtering of images
imgaussfilt3 3-D Gaussian filtering of 3-D images
fspecial Create predefined 2-D filter
imguidedfilter Guided filtering of images
normxcorr2 Normalized 2-D cross-correlation
wiener2 2-D adaptive noise-removal filtering
medfilt2 2-D median filtering
ordfilt2 2-D order-statistic filtering
stdfilt Local standard deviation of image
rangefilt Local range of image
entropyfilt Local entropy of grayscale image
nlfilter General sliding-neighborhood operations
bwareafilt Extract objects from binary image by size
bwpropfilt Extract objects from binary image using properties
padarray Pad array
freqz2 2-D frequency response
fsamp2 2-D FIR filter using frequency sampling
ftrans2 2-D FIR filter using frequency transformation
fwind1 2-D FIR filter using 1-D window method
fwind2 2-D FIR filter using 2-D window method
convmtx2 2-D convolution matrix

Apps

Image Region Analyzer Explore and filter regions in binary image
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