Invalid Argument (Morphology)

[reeve567]

I'm attempting to use the TopHat Morphology operation on two folders of images, and everything runs without the custom("morphology"), however when I add that line, I get this error:

== Compilation error in file lib/melanoma.ex ==
** (MatchError) no match of right hand side value: {"convert: invalid argument for option '-morphology': saved_images/melanoma/new_ISIC_0000002.jpg @ error/convert.c/ConvertImageCommand/2285.\r\n", 1}
    (mogrify 0.9.2) lib/mogrify.ex:80: Mogrify.create/2
    (elixir 1.14.4) lib/enum.ex:1658: Enum."-map/2-lists^map/1-0-"/2
    (elixir 1.14.4) lib/kernel/parallel_compiler.ex:340: anonymous fn/5 in Kernel.ParallelCompiler.spawn_workers/7

Specifically, I'm trying to use this command:

magick man.gif -morphology TopHat Disk tophat_man.gif
(Documentation)

Does anyone have any ideas what I could try next? This is a pretty simple project but I wanted to take the opportunity to learn some Elixir.
Any tips for debugging this would be appreciated too, since I haven't quite figured out many methods for that yet.

Code:

import Mogrify

kernel_size = 4.3
kernel_shape = "Octagon"

source_images = Path.wildcard("./images/*/*.jpg")

IO.puts("Listing source images: #{inspect(source_images)}")

Enum.map(source_images, fn val ->
  image = open(val)
  saved_image_path = String.replace(val, "images", "saved_images")

  IO.puts("Processing #{val}...")
  IO.puts("Saving to #{saved_image_path}...")

  image
  |> custom("morphology", "TopHat #{kernel_shape}:#{kernel_size}")
  |> create([path: saved_image_path])
end)

[talklittle]

Thanks for the bug report. custom(image, "morphology", "...") should be working now in mogrify v0.9.3

You may also need to use save/2 instead of create/2. See 739ada0