Every image has different attributes for cutting out operations like remove the background. So different methods are needed to be applied. Different images require different approaches. Alpha channel masking is a bit complex way of doing masking. The above two types of masking are fairly simple. But when we need to mask out the hair and furry areas, it becomes very difficult and time-consuming to select those areas with just the brush strokes. If the object and the background have a sufficient amount of contrast, the alpha channel masking technique will be easier to apply.