Apparatus comprising: a trigger detector adapted to respond to each of a set of distinguishable objects when the object is in a trigger detection region relative to the trigger detector, providing a respective trigger signal; an encoder/sensor adapted to obtain sensing results from objects in an encoding/sensing region relative to the encoder/sensor; a relative motion component adapted to cause relative motion of a subset of the distinguishable objects into the trigger detection region, from the trigger detection region into the encoding/sensing region, and within the encoding/sensing region in that order; and a circuitry component that includes at least one of: control circuitry that, in response to the respective trigger signal of an object in the subset, is adapted to provide control signals characterized in that the control signals cause one or both of the encoder/sensor and the relative motion component to operate so that the encoder/sensor obtains respective encoded sensing results indicating at least one time-varying waveform with information resulting from the object's relative motion within the encoding/sensing region; and the apparatus further comprises processing circuitry that, in response to the respective trigger signal of an object in the subset, is adapted to obtain data from the sensing results, the data indicating at least one time-varying waveform with information resulting from the object's relative motion within the encoding/sensing region. a trigger detector adapted to respond to each of a set of distinguishable objects when the object is in a trigger detection region relative to the trigger detector, providing a respective trigger signal; an encoder/sensor adapted to obtain sensing results from objects in an encoding/sensing region relative to the encoder/sensor; a relative motion component adapted to cause relative motion of a subset of the distinguishable objects into the trigger detection region, from the trigger detection region into the encoding/sensing region, and within the encoding/sensing region in that order; and a circuitry component that includes at least one of: control circuitry that, in response to the respective trigger signal of an object in the subset, is adapted to provide control signals characterized in that the control signals cause one or both of the encoder/sensor and the relative motion component to operate so that the encoder/sensor obtains respective encoded sensing results indicating at least one time-varying waveform with information resulting from the object's relative motion within the encoding/sensing region; and the apparatus further comprises processing circuitry that, in response to the respective trigger signal of an object in the subset, is adapted to obtain data from the sensing results, the data indicating at least one time-varying waveform with information resulting from the object's relative motion within the encoding/sensing region. control circuitry that, in response to the respective trigger signal of an object in the subset, is adapted to provide control signals the control signals cause one or both of the encoder/sensor and the relative motion component to operate so that the encoder/sensor obtains respective encoded sensing results indicating at least one time-varying waveform with information resulting from the object's relative motion within the encoding/sensing region; and the apparatus further comprises processing circuitry that, in response to the respective trigger signal of an object in the subset, is adapted to obtain data from the sensing results, the data indicating at least one time-varying waveform with information resulting from the object's relative motion within the encoding/sensing region.