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| =begin | |
| objective:: | |
| Take two similar images, overlay them and show the difference between them. | |
| example output: https://github.com/cameronbarker/cameronbarker.github.io/blob/master/prototype/splt/img/art-project.gif | |
| requirements:: | |
| ruby 2.1.1 | |
| image size 616x616 |
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| #http://developers.lyst.com/data/images/2014/02/13/background-removal/ | |
| import pgmagick as pg | |
| def trans_mask_sobel(img): | |
| """ Generate a transparency mask for a given image """ | |
| image = pg.Image(img) | |
| # Find object |
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