Input pattern standardising method for recognising pattern with combination of mapping for gas recognition system|involves performing standardising transformation on reduced dimensionally training patterns so as to substantially map said training patterns onto reduced dimensionally reference patterns

The method involves training standardisation means to perform standardisation, inputting an input pattern to said standardisation means and outputting a standardised pattern from said standardisation means. A plurality of reference patterns are mapped into a space of reduced dimensionally, preferably between one and five. Each pattern is of a type corresponding to a reference pattern, and said pattern is mapped to space of reduced dimensionally equal to the dimensionally of the reference patterns. A standardising transformation is performed on the reduced dimensionally training patterns so as to substantially map said training patterns onto the reduced dimensionally reference patterns.ADVANTAGE - Eliminates need for recalibration and provides reliable gas recognition.