customize image in background

[DineeshDS]

How i can define my own image (background) to generate Mosaic image. I need to generate image mosaic in a kid face, what modification i need to work on this library ? I have tried this in my local and getting too much time to render , can you suggest me the best way to use this ? Your feedback appreciated ,

[jdecode]

The parameter --input is the file name/path of the background image. You can pass any other image as a value to this parameter (including your own image)