How to process multiple Jpeg images in R -


i started using rstudio, available package analyze images in r. want analyze 50 images stored in folder. how can read each image (by forming loop), perform operation on each image , save output (my output list) vector?

update:

i wrote piece of code following:

folder <- "f:/f_diff/1_d/glass/new folder/"      # path folder holds multiple .jpg files file_list <- list.files(path=folder, pattern="*.jpg") # create list of .jpg files in folder  (i in 1:length(file_list)){   assign(file_list[i],         #read image      im2 <- readimage(paste(folder, file_list[i], sep=''))       #analyze each image      b <- matrix(im2,nrow=808,ncol=610,byrow=false, dimnames=null)      haarimtest <- tos2d(b, smooth = false, nsamples = 100)      summary(haarimtest)   )}

i getting following errors:

error: unexpected symbol in: " #analyze each image b" haarimtest <- tos2d(b, smooth = false, nsamples = 100) error in base::log2(x) : non-numeric argument mathematical function summary(haarimtest) error in summary(haarimtest) : object 'haarimtest' not found

)} error: unexpected ')' in " )"

update 2

after tinkering code , lot of searching, able run it. code first imports 30 .tif images of size 64x64 pixels folder , perform image analysis on each image updated code follows:

> library(tiff)    library(ls2w)    library(ls2wstat) > # path folder holds multiple .tif files    path <- "c:/users/metaheuristics/documents/matlab/diff_64 x64/2d/"  > # create list of .tif files in folder    files <- list.files(path=path, pattern="*.tif")  >  > #import files     for(file in files) {      perpos <- which(strsplit(file, "")[[1]]==".")      assign( > gsub(" ","",substr(file, 1, perpos-1)),  > b<-readtiff(paste(path,file,sep=""))) >    #perform image analysis on individual images      haarimtest <- tos2d(b, smooth = false, nsamples = 100)               summary(haarimtest)      }

just 1 problem, not being able save result.


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