An image data obtaining method and apparatus therefor, where the image data obtaining method involves determining an image-capturing mode from among a first image-capturing mode for capturing an image of a target subject by using a filter having a first area for transmitting light and a second area for blocking light, and a second image-capturing mode for capturing the image of the target subject without using the filter; capturing the image of the target subject by selectively using the filter according to the determined image-capturing mode; and processing captured image data.