1. A diagnosis support apparatus for diagnosing a lesion based on a captured image of an affected area, the apparatus comprising: a dermoscope-equipped image capturing device which captures the captured image; a storage which stores the captured image; a display which displays the captured image stored in the storage; and a processor which, under control of a program stored in a memory, processes the captured image stored in the storage, wherein the processor, under control of the program stored in the memory, performs: separation processing of separating the captured image into a brightness component and a color information component; extraction processing of extracting a region to be diagnosed, the extracting processing comprising at least a first extraction processing of extracting a candidate region based on the brightness and a second extraction processing of extracting a likelihood of a region based on the color information component, and performing a morphology processing comprising a smoothing filter processing on an extracted candidate region or an extracted likelihood of the region; and wherein the display further displays the captured image having been processed by the processor.