1. An image processing apparatus, comprising: an image separation processing section for separating an inputted image signal into a transparent image portion having transparency and a background image by detecting from the inputted image signal a pixel data common among a plurality of frames within the inputted image signal; a frame interpolator that performs frame interpolation using the background image separated in the image separation processing section; and a composition processing section for combining the background image frame-interpolated by the frame interpolator with the transparent image portion separated by the image separation processing section.