an image sensor used to implement a system to prevent aliasing problems typically encountered in charge coupled devices where a single charge coupled device is used to sense multiple colors . the image sensor has an imaging region having a substrate of semiconductor material including that which provides for accumulation of charge . the transfer of charge carriers contained within said imaging region is performed to two horizontal shift registers located adjacent to the sensing region . the horizontal shift registers having a series of storage regions for receiving charge carriers from the sensing region . control is provided for implementing transfer of charge carriers out of the image sensing region and into the horizontal registers . the controlled transfer of charge carriers employs multiple clocking techniques to transfer charge carriers between and out of the horizontal registers . the multiple clocking techniques employ independent timing adjustments for register loading periods and an independent timing adjustment for register readout periods . the adjustments provide for control of rise and fall time of the clock pulses in order to prevent color mixing .