| 摘要 |
AN APPARATUS AND A METHOD FOR DETERMINING THE ANNUAL RING CENTER (45) OF A WOOD BLOCK (200) ARE DISCLOSED. A PLURALITY OF LINES OF PATH (43) ISD OUT AND GENERATED. EACH LINE OF PATH IS COMPOSED OF A PLURALITY OF LINES EACH EXTENDING NORMAL TO A LINE THAT IS TANGENTIAL TO AN ANNUAL RING (44) IN AN IMAGE OF THE WOOD BLOCK END. THE NORMAL LINE MAY BED OUT, FOR EXAMPLE, BY CALCULATING THE VARIANCE OF VALUES OF PIXELS LYING ON EACH OF A PLURALITY OF STRAIGHT LINES OF A FILTER (42) AND THE SUM OF THE VARIANCES FOR THE PLURALITY OF STRAIGHT LINES AT A PLURALITY OF DIFFERENT ANGULAR POSITIONS OF THE FILTER. THE ANNUAL RING CENTER IN THE IMAGE OF THE WOOD BLOCK END IS DETERMINED THROUGH CALCULATION BASED ON THE POINTS OF INTERSECTION OF THE GENERATED LINES OF PATH. 4 |
