ImageMagick transparent watermark

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convert -resize 800x600 -quality 80% -strip -interlace Plane -pointsize 150 -font Tahoma -draw "gravity center fill RGBA(200,200,200,0.3) text 0,0 'WATERMARK'" source.jpg output.jpg

Replace WATERMARK with your text
RGBA, A is alpha channel, a number between 0.0 (fully transparent) and 1.0 (fully opaque)

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This page contains a single entry by Pank published on October 29, 2015 11:47 AM.

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