A simple base-calling scheme based on four-label multicolor detection is suggested for DNA sequencing. The entire spectra of the dye labels were used for identification. Specifically, the maxima of the emission spectra rather than the intensity ratios at selected wavelengths are used to provide excellent discrimination. Capillary gel electrophoresis was used for the separation of DNA fragments. Data acquisition and analysis compatible with fast and high-throughput imaging detection was accomplished. The accuracy of base calling of PGEM/U DNA from the raw data obtained with 5 nm and 7 nm spectroscopic resolution were 98.4% for 386 bases and 98.4% for 385 bases. Base calling of M13mp18 DNA showed 98.3% accuracy for 420 bases.