Two different signal‐processing systems are described for the conversion of reflection high‐energy electron diffraction (RHEED) patterns, displayed on a phosphor screen, into quantitative data. Both systems are based on the use of a sensitive video camera. One system using a multichannel boxcar integrator is particularly suited to simultaneous temporal measurements of different RHEED beams and integrated line intensities, while the other can be applied to fast data acquisition of line profiles. The system performance is illustrated and discussed.