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I want to do image processing using the Wolfram Language on a web app hosted on the Wolfram Cloud.

The user must be able to upload a PNG image to the Wolfram Cloud, how can I set this up?

I've been looking at the documentation of CloudDeploy and haven't found something related yet. Should I be looking instead at the Wolfram Data Drop and its REST interface?

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CloudDeploy is not the whole story. FormPage or FromFunction will give you access to file system and even camera on a mobile device. Simplest example:

CloudDeploy[
 FormPage[{"image" -> "Image"}, EdgeDetect[#image] &],
 Permissions -> "Public"]

enter image description here

There is a very nice example HERE:

enter image description here

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    $\begingroup$ How do you do that with multiple images (= list of images) at once? $\endgroup$ – Detlef Mar 20 '18 at 14:01
  • $\begingroup$ @Detlef Did you ever learn how to do this with multiple images? $\endgroup$ – Lee Mar 2 at 15:52

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