Inside/Outside Edge Matting is the right choice when it comes to cropping Objects from images, which do not possess a strictly monotone background or are similar in color to the background itself. Select the Image you wish to crop from album mode and choose the middle option from the following window. Now the selected image should be opened in the Inside/Outside Edge Matting Menu as follows:
For this reason, it makes the most sense to go about separating the object in the fore-ground from the background by hand.
To get started, locate the Menu bar on the right side and select the polygon tool for the out-side selection from the upper left-hand corner.
Now, draw an outer-edge outline around the lion’s entire head.
This does not need to be done with pinpoint precision.
Most important when drawing the outline is making sure no point falls inside the object itself.
Now choose the polygon tool for the inside selection:
Once again, this process does not need to be carried out 100% accurately. In order to be able to work more precisely, however, you can use the zoom function located on the left side of the menu bar:
An alternative option is simply scrolling with your mouse wheel to adjust the zoom settings.