Method and apparatus for decoding two-dimensional symbols in the spatial domain

A METHOD AND SYSTEM IS PRESENTED TO DECODE A TWO-DIMENSIONAL OPTICAL SYMBOL IN THE SPACE DOMAIN. THE SYSTEM DETERMINES THE ORIENTATION OF A SYMBOL OF THE IMAGE IN THE SPACE DOMAIN THROUGH THE USE OF A TEMPLATE TO DERIVE A COEFFICIENT OF CORRELATION BETWEEN THE ADJACING SIGNS RADIANTLY IN AN ANGLE GIVEN FROM THE TEMPLATE AND THROUGH THE COMPARISON OF THE CORRECTION THAT IT IS TURNED TO THE TEMPLATE WITH REGARD TO THE IMAGE. THE ANGLE OF THE HIGHEST CORRELATION COEFFICIENT CORRESPONDS WITH THE ORIENTATION OF A SET OF SYMBOL AXES INCLUDING CONTIGATED ELEMENTS WHOSE CENTERS ARE COALINATED. THEN, THE SYSTEM PLACES EACH INDIVIDUAL ELEMENT CODIFIED WITH SYMBOL INFORMATION THROUGH THE USE OF SYMBOL SEGMENTS DEFINED BY THE AXLES, ADJUSTING FIRST PLACE TO EACH SEGMENT THE POSITION OF THE AXIS AND THE DIMENSIONS OF THE POSITION DETERMINATION THE ELEMENTS TO BE VANDECODIFIED. THE SYSTEM IS PRESENTED AS IF IT WAS APPLIED TO A SYMBOL BUILT AS A MATRIX OF HEXAGONAL ELEMENTS OF INFORMATION CODIFICATION PLACED IN A SQUARE, WHICH HAS, IN ITS CENTER, AN ACQUISITION OBJECTIVE THAT CONSISTS IN SIX CONCENTRIC RINGS OF ALTERNATE LIGHTING . IN ADDITION, A METHOD IS PRESENTED TO PLACE AN ACQUISITION OBJECTIVE THAT CONSISTS OF A PLURALITY OF CONCENTRIC RINGS OF ALTERNATIVE LEVELS OF REFLEXIVITY (TORO EYES MODEL) IN BIDIMENSIONAL SYMBOLS. SUCH OBJECTIVES CAN BE FOUND EVEN IF THEY VARY IN SIZE AND IN ANGLE OF INCLINATION WITH REGARD TO THE CAMERA FOR OBTAINING IMAGES. THE SYMBOL CHARACTERISTICS OF THE OBJECTIVES ARE USED TO PLACE THE INDEPENDENT OBJECTIVES OF THE SELECTED THRESHOLD LEVEL TO DETERMINE THE TRANSITIONS BETWEEN THE RINGS OF DIFFERENT REFLEXIVITY.