1. An image processing apparatus connected to at least one camera, the apparatus comprising: a performance calculating unit configured to calculate a decoding performance of the at least one camera based on information about at least one of a codec, a resolution and a frame rate of image frames which are received from the at least one camera; and a filtering unit configured to filter the received image frames to select image frames for decoding, based on a result of the calculation of the decoding performance of the at least one camera.