imread bug while loading BMP file on Mac OS X

[alexandreyc]

Hi,

I've a problem while using the imread function for loading bmp file :

julia> img = Images.imread("data/trainResized/1.Bmp")
ERROR: key not found: 8
 in getindex at dict.jl:615
 in imread at /Users/alexandre/.julia/v0.3/Images/src/ioformats/OSXnative.jl:57
 in imread at /Users/alexandre/.julia/v0.3/Images/src/io.jl:105

I'm using OS X 10.9.5, Julia 0.3.1 and I've installed ImageMagick with MacPorts.

Is there anyone that could help me?

Thanks

[jgbos]

Can confirm this happens with PNG as well. The cause is most likely related to the latest OSX update, everything worked fine until my computer just updated.

[kmsquire]

Interesting. Not sure if this will work, but try running Pkg.build("Images") and seeing if that helps.

[jgbos]

No errors during the build, here's the output:

INFO: Building Homebrew
remote: Counting objects: 73, done.
remote: Compressing objects: 100% (49/49), done.
remote: Total 73 (delta 59), reused 38 (delta 24)
Unpacking objects: 100% (73/73), done.
From https://github.com/Homebrew/homebrew
   5057268..26231bb  master     -> origin/master
HEAD is now at 26231bb haxe: update dependencies
HEAD is now at 73c6cfe Bottle cbc
INFO: Building Images

On Sat, Sep 27, 2014 at 1:32 PM, Kevin Squire notifications@github.com
wrote:

Interesting. Not sure if this will work, but try running
Pkg.build("Images") and seeing if that helps.

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Reply to this email directly or view it on GitHub
#193 (comment).

[timholy]

A couple of observations:

• Notice the error came from OSXnative.jl.
• Pkg.build("Images") is a great default reaction to I/O problems, but the OSXnative reader isn't affected by anything that happens in the build script. So in this case, you can cross Homebrew, BinDeps, or build.jl off as potential suspects.
• It's quite suspicious that an OS update seems implicated.

So, let's find out what changed. See that error about line 57, and the line above it saying "key not found"? From the julia prompt, try something like this:

edit("/Users/alexandre/.julia/v0.3/Images/src/ioformats/OSXnative.jl",57)

(or just open the file in an editor any way that works). You'll notice that line is looking something up in a dictionary. Let's see what that key value actually is: put something like

@show pixeldepth

before that line and see what it says.

[timholy]

(I'd do this myself, but I don't have a Mac.)

[timholy]

Oh, wait: looking at the output more closely, I bet the key is "8". I bet 366679f broke this. Fix coming momentarily.

[timholy]

Fixed by 0a16a21. Available through Pkg.update().

[jgbos]

That did it. Thanks, must have updated before the OSX update.

On Sat, Sep 27, 2014 at 2:33 PM, Tim Holy notifications@github.com wrote:

Closed #193 #193.

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#193 (comment).

[alexandreyc]

It also worked for me. Thanks

[timholy]

Glad it worked, and thanks everyone for reporting back.