# Set a CRAN mirror
options(repos = "https://cran.rstudio.com/")
# Install packages from CRAN
#install.packages(c("htmltools", "jpeg", "imager", "EBImage", "dplyr", "OpenImageR"))
# Install packages from Bioconductor
#if (!requireNamespace("BiocManager", quietly = TRUE)) {
# install.packages("BiocManager")
#}
#BiocManager::install("EBImage")
# C:/Users/mikha/OneDrive/Desktop/Data 605/jpg
num=17
files <- list.files("C:/Users/mikha/OneDrive/Desktop/Data 605/jpg",pattern="\\.jpg")[1:num]
files
## [1] "RC_2500x1200_2014_us_53446.jpg" "RC_2500x1200_2014_us_53455.jpg"
## [3] "RC_2500x1200_2014_us_53469.jpg" "RC_2500x1200_2014_us_53626.jpg"
## [5] "RC_2500x1200_2014_us_53632.jpg" "RC_2500x1200_2014_us_53649.jpg"
## [7] "RC_2500x1200_2014_us_53655.jpg" "RC_2500x1200_2014_us_53663.jpg"
## [9] "RC_2500x1200_2014_us_53697.jpg" "RC_2500x1200_2014_us_54018.jpg"
## [11] "RC_2500x1200_2014_us_54067.jpg" "RC_2500x1200_2014_us_54106.jpg"
## [13] "RC_2500x1200_2014_us_54130.jpg" "RC_2500x1200_2014_us_54148.jpg"
## [15] "RC_2500x1200_2014_us_54157.jpg" "RC_2500x1200_2014_us_54165.jpg"
## [17] "RC_2500x1200_2014_us_54172.jpg"
height=1200; width=2500;scale=20
plot_jpeg = function(path, add=FALSE)
{ jpg = readJPEG(path, native=T) # read the file
res = dim(jpg)[2:1] # get the resolution, [x, y]
if (!add) # initialize an empty plot area if add==FALSE
plot(1,1,xlim=c(1,res[1]),ylim=c(1,res[2]),asp=1,type='n',xaxs='i',yaxs='i',xaxt='n',yaxt='n',xlab='',ylab='',bty='n')
rasterImage(jpg,1,1,res[1],res[2])
}
im=array(rep(0,length(files)*height/scale*width/scale*3), dim=c(length(files), height/scale, width/scale,3))
for (i in 1:num){
temp=resize(readJPEG(paste0("C:/Users/mikha/OneDrive/Desktop/Data 605/jpg/", files[i])),height/scale, width/scale)
im[i,,,]=array(temp,dim=c(1, height/scale, width/scale,3))}
flat=matrix(0, num, prod(dim(im)))
for (i in 1:num) {
newim <- readJPEG(paste0("C:/Users/mikha/OneDrive/Desktop/Data 605/jpg/", files[i]))
r=as.vector(im[i,,,1]); g=as.vector(im[i,,,2]);b=as.vector(im[i,,,3])
flat[i,] <- t(c(r, g, b))
}
shoes=as.data.frame(t(flat))
#Actual Plots
par(mfrow=c(3,3))
par(mai=c(.3,.3,.3,.3))
for (i in 1:num){ #plot the first images only
plot_jpeg(writeJPEG(im[i,,,]))
}
scaled=scale(shoes, center = TRUE, scale = TRUE)
mean.shoe=attr(scaled, "scaled:center") #saving for classification
std.shoe=attr(scaled, "scaled:scale") #saving for classification...later
#Calculate Covariance (Correlation)
Sigma_=cor(scaled)
#Get the Eigencomponents
myeigen=eigen(Sigma_)
cumsum(myeigen$values) / sum(myeigen$values)
## [1] 0.6928202 0.7940449 0.8451073 0.8723847 0.8913841 0.9076338 0.9216282
## [8] 0.9336889 0.9433872 0.9524455 0.9609037 0.9688907 0.9765235 0.9832209
## [15] 0.9894033 0.9953587 1.0000000
#Eigenshoes
scaling=diag(myeigen$values[1:5]^(-1/2)) / (sqrt(nrow(scaled)-1))
eigenshoes=scaled%*%myeigen$vectors[,1:5]%*%scaling
par(mfrow=c(2,3))
imageShow(array(eigenshoes[,1], c(60,125,3)))
#Generate Principal Components
height=1200
width=2500
scale=20
newdata=im
dim(newdata)=c(length(files),height*width*3/scale^2)
mypca=princomp(t(as.matrix(newdata)), scores=TRUE, cor=TRUE)
#Eigenshoes
mypca2=t(mypca$scores)
dim(mypca2)=c(length(files),height/scale,width/scale,3)
par(mfrow=c(5,5))
par(mai=c(.001,.001,.001,.001))
for (i in 1:num){#plot the first 25 Eigenshoes only
plot_jpeg(writeJPEG(mypca2[i,,,], bg="white")) #complete without reduction
}
a=round(mypca$sdev[1:20]^2/ sum(mypca$sdev^2),3)
cumsum(a)
## Comp.1 Comp.2 Comp.3 Comp.4 Comp.5 Comp.6 Comp.7 Comp.8 Comp.9 Comp.10
## 0.693 0.794 0.845 0.872 0.891 0.907 0.921 0.933 0.943 0.952
## Comp.11 Comp.12 Comp.13 Comp.14 Comp.15 Comp.16 Comp.17 <NA> <NA> <NA>
## 0.960 0.968 0.976 0.983 0.989 0.995 1.000 NA NA NA
x = t(t(eigenshoes)%*%scaled)