1. An image process apparatus comprising: first input means for inputting multi-level dot information each pixel of which comprises a plurality of bits; separating means for separating each multi-level dot information input by the first input means into a pair of multi-level dot information and binary dot information; first signal processing means for subjecting the multi-level dot information of each pair of multi-level dot information and binary dot information separated by the separating means to signal processing; second signal processing means for subjecting the binary dot information of the pair to signal processing; synthesizing means for synthesizing a signal processed by the first processing means and a signal processed by the second signal processing means; and output means for outputting a visible image based on the signals synthesized by the synthesizing means.