Photoshop contains a tool that will allow you to automatically detect the edges of an image when creating a clipping path. This can be a helpful tool when you are getting started with your photo editing, but drawing in a clipping path by hand will allow you to get a flawless finish for better editing. Multiple tools can be used to create a clipping path depending on the level of detail you are hoping for. Use the tool that is most compatible with your drawing style so you can create your line with minimal backtracking.
Creating a Detailed Clipping Path
Automatically defining the edges of an image can result in several edges becoming overlooked. If you have a complex image to trace, you want to ensure that all portions of the background are removed from your final clipping path. Drawing in your path by hand will also allow you to adjust your clipping path later to remove overdrawn edges that appear artificial. Images that have holes will need to use multiple clipping paths to remove all of the background materials. Otherwise, the background colors from the original image will be transferred to any other medium you transfer the object to. If you are removing an object for a colorful background, take care of adjusting the design of the clipping path. Split the difference between the edge of the object and the area where the colors begin to blend. Once you remove the background, blend the edge of the object to eliminate any bleeding colors which alter the look of the object.
Do not Overdo Anchor Points
As a general rule, you should create anchor points every time your clipping path changes directions. Some versions of Photoshop will insert anchor points automatically. However, if you insert too many anchor-points your line can look choppy. Draw your line in with the pen or brush tool and add anchor points in later, removing those which appear unnecessary or break up your line.
Creating Multiple Clipping Paths on One Image
If you will be using clipping paths to assist with photo editing, it may be necessary to create several paths within one image. This will allow you to apply different color or contrast effects depending on the natural lighting within the picture. Create each clipping path on its own layer so you can edit them and add photo effects individually. If clipping paths will overlap, create separate anchor points so they do not become one object. Close the clipping path, even if you only need a line on one side of an object. Otherwise, Photoshop will automatically connect the first and last anchor points on your clipping path, which can cut your image in half.