1. An image processing apparatus connected to at least one camera, the apparatus comprising at least one processor to implement: a performance calculating unit configured to calculate a first performance 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 from among the received image frames, based on a result of the calculation of the first performance; wherein the at least one camera comprises a plurality of cameras, and wherein the filtering unit is configured to select the image frames for decoding by comparing a sum of respective first performances with respect to the plurality of cameras about at least one of a codec, a resolution and a frame rate of image frames which are received from the cameras calculated by the performance calculating unit with a second performance corresponding to a decoding performance of the image processing apparatus about at least one of a codec, a resolution and a frame rate which is preset for the image processing apparatus to process image frames.