A solid-state image pickup apparatus includes photosensitive cells and color filter segments arranged in a particular pattern and assigned to a particular photosensitive cell each. Signal charges generated in the photosensitive cells by photoelectric transduction are digitized and then written to a frame memory as pixel data. Correlation of the pixel data read out of the frame memory is detected. Each color is multiplied by a particular constant on the basis of the detected correlation of the pixel data to thereby output corrected pixel data. The corrected pixel data are used to generate high-frequency luminance data and three primary color data for actual pixels and virtual pixels. The various kinds of data are used to generate a luminance signal and chrominance signals.