A real-time image pseudocolor encoding method for spatial frequency and density encoding is presented. Pseudocolor images are obtained through color spatial filtering at a spatial frequency plane. The spatial frequency pseudocolor encoding is accomplished by two-dimensional color spatial filters. The density pseudocolor encoding is obtained through contrast reversal of color image, and the contrast reversal is accomplished by two-color halfwave phase filtering. ERTS and airborne remote sensing images are processed directly. Experimental results showed that this method is effective.