Image sensor for improved optical imaging

An imaging device capable of producing images or data with relatively high spectral diversity, allowing for creation of information-rich feature vectors, is provided. Among other things, such information-rich feature vectors may be applied to a range of artificial intelligence and machine learning applications. The imaging device may include a substrate having a baseline spectral responsivity function, multiple pixels forming a cell fabricated on the substrate, and spectral filters each configured to filter light based on a transmission function corresponding to a substantially broad portion of the baseline spectral responsivity function. The spectral filters may be notch filters. Each of the multiple pixels in the cell may be configured to receive light through each of the spectral filters. The transmission function of each of the spectral filters may be substantially different for each of at least a majority of the multiple pixels in the cell.