1. An image processing apparatus comprising: a first low pass filter configured to extract first low frequency components from a first image; a subtracter configured to extract edge components by subtracting the first low frequency components from the first image; a second low pass filter configured to extract second low frequency components from a second image; a first multiplier configured to multiply the edge components by a first coefficient; a second multiplier configured to multiply the second low frequency components by a second coefficient; and an adder configured to add the multiplied edge components outputted from the first multiplier and the multiplied second low frequency components outputted from the second multiplier to generate a composite image, wherein the first image and the second image are captured with different exposures.