Focusing on Image

Implode=(-600)

Blur=0x7

Spread=0x2

Swirl=6000

Fuzz=999 or 9999, color-matt, floodfill

Blur=0x7

Resize if the image does not fit.
Composite= change offset if needed and dstover 

Sharpen =0x2 or 0x1 

Normalize 

Save as png or jpeg

More samples: 

Bengal Tiger

Lion through circle