"imshow_cmd not defined" on OSX about imageview.jl

[timholy]

There is no imshow currently defined in Images; do you mean another package, or are you using an older version of Images? ImageView is the package for displaying images (including matrices) now. Winston also has an imshow defined for matrices, although it doesn't have ImageView's interactive features.

[timholy]

I thought this issue was against Images, but now I see it's in ImageView, which indeed does support imshow. Oops.

The main command to display images is display, which (because of Julia's display function) now has to usually be qualified with the module name. It looks like this doesn't work because I've disabled running config---I can't remember why ATM. Honestly, I'm quite tempted to disable the external interface altogether. Do you need it for some reason?

[ssfrr]

Hi Tim,

Mostly I was trying to figure out how to take a 2D intensity matrix (an audio spectrogram) and display it (preferably in ijulia) and it wasn't clear to me what I was supposed to use.

In the end I ended up having the best luck with using Winston's imagesc, which was especially convenient as it handled the colormapping for me and added the time and frequency axes. It would be nice to get some interactivity though, which is why I was looking at ImageView.

[timholy]

The best plan is to get interactivity into Winston. There are some features I'm planning to add to ImageView that might be handy (basically, on-the-fly recalculation for huge images), but if you want axes Winston is my suggested route.

That said, in ImageView you should be able to use scalei=ScaleAutoMinMax() to handle the autoscaling, and of course you can define a one-line function to make that convenient, e.g.,

showsng(A) = ImageView.display(A, scalei=ScaleAutoMinMax())

[timholy]

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