如何使用ImageMagick实现这种模糊的文本轮廓效果？

Question

https://thumb7.shutterstock.com/display_pic_with_logo/1517996/1106095757/stock-photo-photographer-silhouette-people-make-a-photo-of-nature-landscape-for-photostocks-and-social-networks-1106095757.jpg

I'm interested in creating a similar effect for watermarking images on my site.

I need to generate it on the fly as the text in the middle would be different on each photo, so I can't use a precomposed png file.

I'm not bothered about the exact font (I have one I'm happy with), but how can I go about adding a nicely blurred outline around it like they have?

I tried using gaussianBlurImage but it doesn't work on an ImagickDraw object. Do I need to compose my ImagickDraw onto an Imagick object first, then blur it, then compose it onto the main image?

Or are there some clever ImagickDraw functions I can use that I've not discovered yet?

Thanks

Answer 1

You can do that in ImageMagick, by creating a transparent background and adding text via label: using black text with a white stroke and then reducing the opacity. Then composite that latter onto your original.

Original:

convert image.jpg \( -background none -pointsize 64 -fill black -strokewidth 2 -stroke white -font arial -gravity center label:"stockphoto" -channel a -evaluate multiply 0.33 +channel \) -gravity center -geometry +0+50 -compose over -composite result.jpg