Put some background pixel into top and bottom of a image

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Malan Jayanka
Malan Jayanka el 23 de Oct. de 2016
Comentada: Image Analyst el 23 de Oct. de 2016

I have a image like this and I want to put some background pixels to top and bottom of the image. How to do this??

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Image Analyst
Image Analyst el 23 de Oct. de 2016
Expand the canvass with padarray(). Then use copy and paste, like my attached demo.
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Malan Jayanka
Malan Jayanka el 23 de Oct. de 2016
Editada: Malan Jayanka el 23 de Oct. de 2016
Expand the canvass with padarray() mena this?
And also this code is work only for gray scale images??how to do this with RGB images??
Image Analyst
Image Analyst el 23 de Oct. de 2016
The newly attached version also handles color and indexed images.

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