EBImage do not read an Image: requested image not found or could not be loaded --- RESOLUTION

Thanks Uwe for your reply.

I can open the lena-color.png file with several programs: firefox, M$ 
Picture Manager, IMDisplay (GUI of ImageMagick)
I converted lena-color.png in lena2.jpeg using M$ Picture Manager.

With a old version of rimage package, I can read JPEG files (only) 
with "read.jpeg" functions...
the others functions of the EBImage package, (ex.: blur, rotate, 
flip)  works fine! because works for array class...

So, the lena-color file seems fine!

The problem should be some interaction of my winXP configuration with 
the readImage function ("lib_readImages")

Thanks again...
Cleber N. Borges

### Making tests..
----------------------------------------

library(rimage)

Warning message:
package 'rimage' was built under R version 2.8.1 and help will not 
work correctly
Please re-install it

f <- 'C:/R/library/EBImage/images/lena2.jpg'

f

[1] "C:/R/library/EBImage/images/lena2.jpg"

x <- read.jpeg( f )
class(x)

[1] "imagematrix" "array"     > dim(x)
[1] 512 512   3

library(EBImage)

Loading required package: abind

Attaching package: 'EBImage'


       The following object(s) are masked from package:rimage :

        equalize,
        normalize

?blur   # woks fine
     if (interactive()) display(x)

    >         y = blur(x, r=3, s=2)

        if (interactive()) display(y, title='blur(x, r=3, s=2)')

    >         y = gblur(x, r=3, s=2)

        if (interactive()) display(y, title='gblur(x, r=3, s=2)')

    > ?rotate  # works fine
        y = flip(x)

        if (interactive()) display(y, title='flip(x)')

    >         y = flop(x)

        if (interactive()) display(y, title='flop(x)')

    >         y = resize(x, 128)

        if (interactive()) display(y, title='resize(x, 128)')

    >         y = rotate(x, 30)

        if (interactive()) display(y, title='rotate(x, 30)')

    >

Cleber Borges wrote:

Hello all,

I am trying to use the EBImage package,
(EBImage 3.2.0 and ImageMagick 6.5.7-9 2009-11-19 Q8 (dinamic 
linked) with R 2.10.0 winXP)
but I get the following error:

#---------------------------------------------

 > library(EBImage)

Loading required package: abind

 > ?readImage
 >  ## Reads and display images
 >         f = system.file("images", "lena-color.png", 

package="EBImage")

 > f

[1] "C:/R/library/EBImage/images/lena-color.png"

 >
 >  x = readImage(f)

Warning message:
In readImage(f) : requested image not found or could not be loaded

 > x

NULL


Is there a way of to solve the problem? Or make a workaround? (but 
with no source code compilation)

Works for me with the same setup.
Are yiu sure the file exists on your machine and is uncorrupted. Do 
you have access and read permissions?

Uwe Ligges

[[elided Yahoo spam]]

Cleber Nogueira Borges



============================

[[elided Yahoo spam]]
[[elided Yahoo spam]]

Error in readImage() : cancel pressed or no image could be loaded
In addition: Warning message:
In readImage() : requested image not found or could not be loaded

============================

### PATH of windows xp system
----------------------------------------------------------------------------------------------------------- 


C:\Documents and Settings\Cleber>path
PATH=C:\ImageMagick;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBEM;C 

:\GTK\bin;C:\GTK\lib

C:\Documents and Settings\Cleber>convert -version
Version: ImageMagick 6.5.7-9 2009-11-19 Q8 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2009 ImageMagick Studio LLC
Features: OpenMP


### details about R session
----------------------------------------------------------------------------------------------------------- 

 > sessionInfo()

R version 2.10.0 (2009-10-26)
i386-pc-mingw32

locale:
[1] LC_COLLATE=Portuguese_Brazil.1252  
LC_CTYPE=Portuguese_Brazil.1252  [3] 
LC_MONETARY=Portuguese_Brazil.1252 LC_NUMERIC=C                     
[5] LC_TIME=Portuguese_Brazil.1252  attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   
base   other attached packages:
[1] EBImage_3.2.0 abind_1.1-0
loaded via a namespace (and not attached):
[1] tools_2.10.0

 >