imageToPatch: Transform an image into a collection of patches

In MBCbook: Companion Package for the Book "Model-Based Clustering and Classification for Data Science" by Bouveyron et al. (2019, ISBN:9781108644181).

Description

Transform an image into a collection of small images (patches) that cover the original image.

Usage

imageToPatch(Im,f)

Arguments

Im	the image for which one wants to extract local patches.
f	the size of the desired patches (fxf).

Value

A data frame of all extracted patches is returned.

Author(s)

C. Bouveyron & J. Delon

Examples

Im = diag(16) 
ImNoise = Im + rnorm(256,0,0.1)
X = imageToPatch(ImNoise,4)
out = mixmodCluster(X,10,model=mixmodGaussianModel(family=c("spherical")))
res = mixmodPredict(X,out@bestResult)
Xdenoised = denoisePatches(X,out,P = res@proba,sigma = 0.1) 
ImRec = reconstructImage(Xdenoised,16,16)
par(mfrow=c(1,3)); imshow(Im); imshow(ImNoise); imshow(ImRec)

Example output

Loading required package: mclust
Package 'mclust' version 5.4.7
Type 'citation("mclust")' for citing this R package in publications.
Loading required package: Rmixmod
Loading required package: Rcpp
Rmixmod v. 2.1.5 / URI: www.mixmod.org
Loading required package: MASS
Loading required package: mvtnorm

Attaching package: ‘mvtnorm’

The following object is masked from ‘package:mclust’:

    dmvnorm

MBCbook documentation built on July 2, 2019, 9:08 a.m.