Here's an example of the output from bg_removal. Requires you to specify two different fuzz values). GIMP also allows you to delete the background to transparent. Also, theīg_removal script runs slower and is a little bit trickier to use (it Results are not great because it still uses 1-bit alpha. Which uses floodfill in a similar manner as my solution. It can be run on multiple files in aĭirectory and includes helpful comments in case you want toīy the way, ImageMagick actually comes with a script called Since it's unlikely you'll want to type this command repeatedly, I Remember and if you're converting to GIF, you're limited to 1-bit (For example: It's a heck of a lot easier to Of course, I completely admit there are times when you may wish to use Notice how the Wizard's beard has disappeared in the simple approach.Ĭompare the edges of the Wizard to see how antialiased alpha helps theįigure blend smoothly into the background. White") versus my solution, when run on theīoth transparent images onto a saddle brown background to make theĭifferences apparent (click for originals). Here is a comparison of the simple approach ("-fuzz 2% -transparent Of course, ImageMagick's morphological operations don't (yet?) work at the subpixel level, so you can see I am blowing up the alpha channel to 200% before eroding. The same color as the top left pixel, using a floodfill from theĪdditionally, the alpha channel is also eroded by half a pixel to avoid halos. ("Background" is defined as approximately This will ensure that you delete the background to transparent and not to white or black color. Right-click it and select Add Alpha Channel. In the lower-right corner of your screen, select your image layer. To antialiased alpha, and (2) only the background is removed as To turn your image’s background transparent using Fuzzy Select, follow the steps below. This is the option that will delete the white background by making it transparent. This is rather a bit longer than the simple answers previously given,īut it gives much better results: (1) The quality is superior due Step 2: Do Some Right-Clicking Now Right-Click your image, go to colours (or colors in this case) and then go to 'Colour to Alpha'. compose CopyOpacity -composite -shave 1 outputfilename.png morphology erode square:1 -geometry 50% \) \ alpha extract -geometry 200% -blur 0x0.5 \ \( +clone -fuzz 30% -fill none -floodfill +0+0 $color \ Solution color=$( convert filename.png -format "%" info:- )Ĭonvert filename.png -alpha off -bordercolor $color -border 1 \
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