Remove Black Background From Pictures

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Author	Replies: 3 / Views: 1,637
snitchard Valued Member United States 420 Posts	Posted 11/29/2016 11:33 am Hello, I have a question about removing the black background from my pictures. This question stems from a previous post http://goccf.com/t/262603#262603) and I have found that scanning my coins and medals using a black background works well, really well. However, when I use Gimp to create a transparent background it leaves black splotches on the pictures, especially on Silver Eagle coins. I'd like a white or transparent background for my website. For some reason the alpha channel is not setting to just the background. Does anyone have any ideas or suggestions because this is VERY frustrating and doesn't seem like it should be this difficult? Thanks, Rich Rich M. - Collector since 2008 Report this Post to the Staff

rmpsrpms Pillar of the Community United States 4038 Posts	Posted 11/29/2016 4:12 pm You may need to slightly darken the image to ensure the background is really black. Most likely there are areas that are not quite 0,0,0. These areas end up not being taken as transparent, so look blotchy. Contact me for photographic equipment or visit my home page at: http://macrocoins.com Report this Post to the Staff
bobby131313 Forum Dad United States 24172 Posts	Posted 11/29/2016 4:17 pm I accomplished this by elevating the coin and having a black background several inches below. I covered a piece of wood with black felt, then screwed a 3" drywall screw barely into it, and put a felt pad on the head of the screw to place the coin on. Shop CCF Members on eBay. Report this Post to the Staff
mamastinky Valued Member United States 441 Posts	Posted 11/29/2016 10:30 pm This is what I do, and there are fewer steps involved than the method you are using. In Gimp, I use the ellipse tool with the "feather edges" box checked (to avoid that harsh 'cropped' look), a feather radius of between 10%-20% is ideal. Select the area around your coin. I like my images square, so I make sure the width and height of the ellipse are equal. Anyway, once you have the area you want selected, copy it (ctrl+c), then paste into a new window with transparent background (ctrl+shift+v). Voila, pure alpha background. Report this Post to the Staff
	Replies: 3 / Views: 1,637

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