A system and method for measuring the similarity of multiple-color images and for locating regions of a target image having color information that matches, at least to a degree, the color information of a template image. On the basis of the detected wheel speeds, slopes of coefficients of friction \u03bc between the wheels and a road surface are estimated as road surface \u03bc slope values of the respective wheels. The activity area is attractive to an infant and encourages the infant to reach up to the activity area by pulling up from a seated position to a standing position using handles or grips disposed on the support or the activity area. A signal line has two parts interrupted by a gap. The summing lever makes it possible for flight control surface actuation systems to use actuators other than actuators having a bypass mode or any other features that prevent the actuators from jamming. Using such a driver with a Pockels cell pulses can be selected in laser systems more efficiently.