How to split an Image into Arrays

[AkS]

Hi..need a help with some tips if possible:

Want to split a image (picture) placed on a canvas into smaller images of 2x2, 3x3 and so on.
Then store the smaller images into 2D arrays for further use...

[Taifun]

unfortunately this is not possible in MIT App Inventor

probably you can find an API which splits the image for you http://www.programmableweb.com/apis/directory

or you could write your own extension and create a block yourself...

see this Android solution http://stackoverflow.com/a/24138014/1545993

more information about how to create an extension see here https://groups.google.com/d/msg/mitappinventortest/Ip2AX036d0U/5NJlAEbFCgAJ

however that will be more advanced and will require some Java skills...

Taifun

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Trying to push the limits of App Inventor! Snippets, Tutorials and Extensions from Pura Vida Apps by Taifun. 

[AkS]

Hi Taifun,

Thanks for answering and providing the links.
As you suggested, probably it is a good idea to dig into creating extensions, which will enhance the usefulness of using AppInventor for custom tasks.

[Taifun]

meanwhile I prepared an image extension, which is also able to create chunks of images, see here https://puravidaapps.com/image.php

The App Inventor Extensions are currently in testing. See the announcement for more information about how to use an App Inventor Extension. 

For example rows=4 and columns=3 will create 12 chunks of the original image, see screenshot

The chunks will be stored in the same directory as the original image file. The following name convention will be used: imageFileName_rowNumber_columnNumber.jpg.

         

Taifun