According to Kantian epistemology, there are three falcuties of mind; sensibility, understanding and imagination. Unfortunately, the differentiation between these three are not totally sure to me so I would like to get verification. Here is how I attempted to understand:
When I look at a tree, the noumenon of the tree is perceived via sensibility and a corresponding phenomenon of the tree arises to my cognition. However, this phenomenon is unprocessed so I don't yet recognize that this phenomenon is that of a tree; just like how an image is nothing but a bunch of pixels to a computer. It is only after the imagination synthesizes the phenomenon that I can label the phenomenon with an appropriate concept(tree). Finally, the understanding makes a judgment about the phenomenon by using a priori categories. For example, it may use the category of unity and existence to judge that "There exists a single tree."
Is my above understanding correct?