CODEWITHSUNDEEP
rimageurldownload
user3768495
user3768495

Reputation: 4657

how to download and display an image from an URL in R?

My goal is to download an image from an URL and then display it in R.

I got an URL and figured out how to download it. But the downloaded file can't be previewed because it is 'damaged, corrupted, or is too big'.

y = "http://upload.wikimedia.org/wikipedia/commons/5/5d/AaronEckhart10TIFF.jpg"
download.file(y, 'y.jpg')

I also tried

image('y.jpg')

in R, but the error message shows like:

Error in image.default("y.jpg") : argument must be matrix-like

Any suggestions?

Upvotes: 17

Views: 30025

Answers (3)

Tania
Tania

Reputation: 166

After downloading the image, you can use base R to open the file using your default image viewer program like this:

file.show(yourfilename)

Upvotes: 1

jatin singh
jatin singh

Reputation: 123

this could work too here 

library("jpeg")

library("png")

x <- "http://upload.wikimedia.org/wikipedia/commons/5/5d/AaronEckhart10TIFF.jpg"    

image_name<- readJPEG(getURLContent(x)) # for jpg

image_name<- readPNG(getURLContent(x)) # for png

Upvotes: 2

MichaelVE
MichaelVE

Reputation: 1344

If I try your code it looks like the image is downloaded. However, when opened with windows image viewer it also says it is corrupt. The reason for this is that you don't have specified the mode in the download.file statement.

Try this:

download.file(y,'y.jpg', mode = 'wb')

For more info about the mode is see ?download.file

This way at least the file that you downloaded is working.

To view the image in R, have a look at 

jj <- readJPEG("y.jpg",native=TRUE)
plot(0:1,0:1,type="n",ann=FALSE,axes=FALSE)
rasterImage(jj,0,0,1,1)

or how to read.jpeg in R 2.15 or Displaying images in R in version 3.1.0

Upvotes: 30

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