A detection system adapted to detect fluorescent substances added in an environment in order to identify the fluorescent substances, wherein said fluorescent substances having known discrete emission spectrums, existing as a mixture in the environment, which is highly absorbent and highly fluorescent, wherein each of said fluorescent substances is used for coding information by employing different emission wavelengths and intensity levels, said detection system comprises: a) at least one illumination unit which emits light to environment in order to excite said fluorescent substances to generate discrete emission spectrums used for generating coding information, wherein said environment has a background emission; b) detection units, at least at a number equal to the number of types of fluorescent substances, for detecting emissions coming from said fluorescent substances; c) bandpass filters, paired with the detection units, wherein the bandpass filter of each detection unit matches a center emission wavelength of the discrete emission spectrum of one of said fluorescent substances; and d) at least one signal processing unit, connected to said detection units, to receive signals including the discrete emission spectrums of said florescence substances form said detection units and process said signals to decode the coding information characterized by further comprising; e) at least one background detector for detecting said background emission, the at least one background detector being in connection with the at least one signal processing unit and in that, said at least one signal processing unit is adapted to apply dynamic background subtraction method to extract the fluorescent emissions coming from the fluorescent substances only by using following formula for a single fluorescent substance P t = P f 0 P f ′ P t ′ − P bg 0, where Pt is real power from the fluorescent substance, PbgO is the power from the blank medium in a collection pass band Δλ2 for the fluorescent substance, Pf' is the power from medium that contains fluorescent substance in a background reference the- pass band Δλ1, Pf0 is the power from the blank medium in the background reference pass band Δλ1 and Pt' is the power from the medium that contains fluorescent substance in the collection pass band Δλ2. a) at least one illumination unit which emits light to environment in order to excite said fluorescent substances to generate discrete emission spectrums used for generating coding information, wherein said environment has a background emission; b) detection units, at least at a number equal to the number of types of fluorescent substances, for detecting emissions coming from said fluorescent substances; c) bandpass filters, paired with the detection units, wherein the bandpass filter of each detection unit matches a center emission wavelength of the discrete emission spectrum of one of said fluorescent substances; and d) at least one signal processing unit, connected to said detection units, to receive signals including the discrete emission spectrums of said florescence substances form said detection units and process said signals to decode the coding information characterized by further comprising; e) at least one background detector for detecting said background emission, the at least one background detector being in connection with the at least one signal processing unit