Determining the control points for constructing a lookup table from a first color space to a second color space is disclosed. A plurality of elements are allocated in logical storage, wherein the plurality of elements correspond to entries of the searchable data structure. The method also includes measuring a response time of the associated data packet received from the partner bank, relative to a transmission time of the captured data packet sent to the partner bank. One ECC device includes a backboard, a chest compression member, a communication module, controller, and at least one sensor, electrode lead or electrode.