How to do partial image resizing in imagemagick?

Question

ImageMagick

Hello.
I need to solve the following problem: compress an image around the edges using imagemagick, preferably in one command (should be done on the fly).
Something like this:

(in the photo, the eyes remained in place, and the cheeks became closer to the center)
That is, so that, say, an area of ​​20% at the edges turns into a 2-fold shrink (it can be linear, it can be smooth)

Answer 1

Found the solution myself:

convert test.jpg 
\( +clone -crop 200x1000+0+0 -sample 100x\! +repage \) -geometry +100+0 -composite  
\( +clone -crop 200x1000+800+0 -sample 100x\! +repage \) -geometry +800+0 -composite  
\( +clone -crop 1000x200+0+0 -sample x100\! +repage \) -geometry +0+100 -composite 
test_result.jpg