bool Imagick::liquidRescaleImage    ( int $width   , int $height   , float $delta_x   , float $rigidity   )

Imagick::liquidRescaleImageAnimates an image or images

width

The width of the target size

height

The height of the target size

delta_x

How much the seam can traverse on x-axis. Passing 0 causes the seams to be straight.

rigidity

Introduces a bias for non-straight seams. This parameter is typically 0.