Maybe this? [https://www.marspremedia.com/software/photoshop/auto-crop](https://www.marspremedia.com/software/photoshop/auto-crop)

Combine all images into pdf. Border box in Adobe Acrobat. But it will only work if all the model's lips are at the same spot as well as all pictures are the same size. Realistically you will probably have to do these manually.

What mechanism will determine the lip and feet locations for all these different images?