13. The processing device of claim 10 , wherein the method further comprises: receiving a correction hint with respect to a misrecognition of the tabular structure, the correction hint including at least one atom of a cell and no atoms of any other cell, the correction hint including fewer than all atoms of the cell; and shrinking the at least one atom of the correction hint.
10. The processing device of claim 8 , wherein the detecting an existence of a tabular structure within handwritten input including a plurality of atoms, further comprises: detecting a left grouping structure based on the plurality of atoms, removing from consideration atoms forming the left grouping structure and leaving a remaining group of atoms for consideration, projecting the remaining group of atoms onto an x-axis and a y-axis to determine a number of rows and a number of columns, assigning ones of the remaining group of atoms to respective cells of the rows and the columns based on a position of each of the respective ones of the remaining group of atoms, merging a pair of the rows of cells or a pair of the columns of cells when at least one empty cell exists to eliminate the at least one empty cell, and validating a final number of rows and a final number of columns.