Formula inputting method and apparatus

1. A formula inputting apparatus comprising:

a user interface configured to receive a handwriting input of a user; and

a controller configured to:

obtain handwriting content based on the handwriting input of the user,

determine, based on a type of the handwriting content, a recommended formula structure which is different from a formula structure of the handwriting content, and

determine one or more recommended content based on the recommended formula structure,

wherein the user interface displays the handwriting content and the one or more recommended content.

2. The formula inputting apparatus of claim 1 , wherein the user interface further displays a list of the one or more recommended content at a location based on coordinate values corresponding to the handwriting input of the user on the user interface.

3. The formula inputting apparatus of claim 2 , wherein the user interface is further configured to receive a user input selecting one of the displayed one or more recommended content from the list and display the selected recommended content.

4. The formula inputting apparatus of claim 3 ,

wherein the user interface is further configured to receive a second handwriting input of the user with respect to the displayed handwriting content or the selected recommended content, and

wherein the controller is further configured to change the displayed handwriting content or the selected recommended content according to the second handwriting input.

5. The formula inputting apparatus of claim 1 , wherein the handwriting content obtained by the handwriting input of the user comprises at least one of a mathematical formula, a matrix, a chemical formula, or a name of a formula.

6. The formula inputting apparatus of claim 5 , wherein, when the handwriting content comprises the mathematical formula, the one or more recommended content comprises at least one of structure information, subscript position information, or equivalence relationship information with respect to the mathematical formula.

7. The formula inputting apparatus of claim 5 , wherein, when the handwriting content comprises the chemical formula, the one or more recommended content comprises at least one of structure information of a molecule or coefficient information.

8. The formula inputting apparatus of claim 5 , wherein, when the handwriting content comprises the matrix, the one or more recommended content comprises at least one of an abbreviation matrix, an expansion matrix, a unit matrix, or a symmetric matrix.

9. The formula inputting apparatus of claim 8 ,

wherein the user interface displays the matrix having a dimension corrected according to an input of the user moving a parenthesis location of the matrix or a second handwriting input of the user indicating a dimension of the matrix.

10. The formula inputting apparatus of claim 8 ,

wherein, when a part of elements included in the matrix is input, the one or more recommended content comprises remaining element information of the matrix, and

wherein the user interface is further configured to display the remaining element information with a lower brightness than the input elements of the matrix.

11. A formula inputting method comprising:

receiving a handwriting input of a user;

obtaining handwriting content based on the handwriting input;

determining, based on a type of the handwriting content, a recommended formula structure which is different from a formula structure of the handwriting content;

determining one or more recommended content based on the recommended formula structure; and

displaying the handwriting content and the one or more recommended content.

12. The formula inputting method of claim 11 , further comprising displaying a list of the one or more recommended content at a location based on coordinate values corresponding to the handwriting input.

13. The formula inputting method of claim 11 , further comprising:

receiving a user input selecting one of the displayed one or more recommended content from a list of the one or more recommended content; and

displaying the selected recommended content.

14. The formula inputting method of claim 11 , wherein the handwriting content obtained based on the handwriting input comprises at least one of a mathematical formula, a matrix, a chemical formula, or a name of a formula.

15. The formula inputting method of claim 14 ,

wherein, when the handwriting content comprises the mathematical formula, the one or more recommended content comprises at least one of structure information, subscript position information, or equivalence relationship information with respect to the mathematical formula, and

wherein, when the handwriting content is the chemical formula, the one or more recommended content comprises at least one of structure information of a molecule and or coefficient information.

16. The formula inputting method of claim 14 , wherein, when the handwriting content comprises the matrix, the one or more recommended content comprises at least one of an abbreviation matrix, an expansion matrix, a unit matrix, or a symmetric matrix.

17. The formula inputting method of claim 16 , wherein the matrix has a dimension corrected according to an input of the user moving a parenthesis location of the matrix or a second handwriting input of the user indicating a dimension of the matrix.

18. The formula inputting method of claim 16 , wherein, when a part of elements included in the matrix is input:

the one or more recommended content comprises remaining element information of the matrix, and

the method further comprises displaying the remaining element information with a lower brightness than the input elements of the matrix.

19. The formula inputting method of claim 13 , further comprising:

receiving a second handwriting input of the user with respect to the displayed handwriting content or the selected recommended content, and

changing the displayed handwriting content or the selected recommended content according to the second handwriting input.

20. A non-transitory computer-readable recording medium having recorded thereon a computer program that when executed by at least one processor performs a method comprising:

receiving a handwriting input of a user;

obtaining handwriting content based on the handwriting input;

determining, based on a type of the handwriting content, a recommended formula structure which is different from a formula structure of the handwriting content;

determining one or more recommended content based on the recommending formula structure; and

displaying the handwriting content and the one or more recommended content.