Reduce size of an image when it is fusioned with other using ImageMagick from terminal in Linux

问题

I am having these two pictures, labeled 1.png and 2.png, respectively:

When I run this code from ImageMagick in my Linux terminal:

composite -blend 75 -gravity West  2.png  1.png prueba.png

I get this result:

However, I would like the logo (2.png) to be half or one-third size reduced and placed in the bottom left corner. How can I do it from the terminal?

回答1:

You can do that in ImageMagick by using the convert syntax. It is more flexible than the composite syntax.

convert 1.png \( 2.png -resize 50% \) -gravity southwest -define compose:args=75 -compose blend -composite 1_2.png

回答2:

If you want to move it further left, you can simply chop off some of the left side before compositing using ImageMagick.

convert 1.png \( 2.png -resize 50% -gravity west -chop 20x0 \) -gravity southwest -define compose:args=75 -compose blend -composite 1_2_b.png

Alternately, you can simply trim the excess empty space around the 2.png before blending.

convert 1.png \( 2.png -resize 50% -trim +repage \) -gravity southwest -define compose:args=75 -compose blend -composite 1_2_c.png

来源：https://stackoverflow.com/questions/60946906/reduce-size-of-an-image-when-it-is-fusioned-with-other-using-imagemagick-from-te