seam segment carving for content and shape aware image retargeting

I am currently working on a project called content and shape aware image re-targeting. Which takes a RGB image and a binary image which is called as a target shape. The aim of the project is to retarget(transform) the RGB image into the desired target shape while preserving its content(salient features). I would like to know the ideal way approaching this project.Like a step by step procedure. Sample Input and output are attached below.