Touch input recognition methods and apparatuses

• US 20090289905A1
• Filed: 07/07/2008
• Published: 11/26/2009
• Est. Priority Date: 05/22/2008
• Status: Abandoned Application

• Current Assignee: KT Tech, Inc. (KT Corporation)
• Original Assignee: KTF Technologies Incorporated
• Inventors: Ahn, Se-Ho
• Application Number:
  US12/216,480
• Publication Number:
  US 20090289905A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

Touch input recognition methods and apparatuses can increase the accuracy of the recognition of touch input from user and reduce processing load in recognizing the touch input. When at least one coordinate value corresponding to a touch trace is received at a given time interval, an inflection point based on the received at least one coordinate value is determined. When a predetermined coordinate value of the at least one coordinate value is a coordinate value of the inflection point, a symbol value is set based on an increment/decrement feature of at least one coordinate value provided before the predetermined coordinate value. Finally, an event corresponding to the set symbol value is retrieved. Thus, the event corresponding to a touch input from a user is retrieved and executed based on an increment/decrement feature of a coordinate value, thereby reducing a processing load and a false recognition rate.

Claims

1. A touch input recognition method comprising:

receiving at least one coordinate value corresponding to a touch trace at a given time interval;

determining an inflection point based on the received at least one coordinate value;

setting, when a predetermined coordinate value of the at least one coordinate value is a coordinate value of the inflection point, a symbol value based on an increment/decrement feature of at least one coordinate value provided before the predetermined coordinate value; and

retrieving an event corresponding to the set symbol value.

2. The touch input recognition method of claim 1, wherein the determining the inflection point based on the received at least one coordinate value comprises:

determining, when increment/decrement features of first and second coordinate values sequentially received at the given time interval are different from each other, the first coordinate value as the coordinate value of the inflection point.

3. The touch input recognition method of claim 1, wherein the setting, when the predetermined coordinate value of the at least one coordinate value is the coordinate value of the inflection point, the symbol value based on the increment/decrement feature of the at least one coordinate value provided before the predetermined coordinate value comprises:

setting the symbol value based on the increment/decrement feature of the at least one coordinate value provided before the predetermined coordinate value among at least one symbol value preset to correspond to an increment/decrement feature of a coordinate value; and

generating a symbol array based on the at least one set symbol value.

4. The touch input recognition method of claim 3, wherein the retrieving the event corresponding to the set symbol value comprises:

retrieving the set symbol value or the generated symbol array from a database pre-storing an event item to be executed for each of at least one symbol value or symbol array.

5. A touch input recognition method comprising:

receiving at least one coordinate value corresponding to a touch trace at a given time interval;

acquiring an accumulated distance and the number of coordinate value inputs based on the received at least one coordinate value;

determining an inflection point based on the received at least one coordinate value;

setting, when a predetermined coordinate value of the at least one coordinate value is a coordinate value of the inflection point, a symbol value based on an increment/decrement feature of at least one coordinate value provided before the predetermined coordinate value;

acquiring a speed proportion value based on the accumulated distance and the number of coordinate value inputs; and

retrieving an event corresponding to the symbol value and the speed proportion value.

6. The touch input recognition method of claim 5, wherein the acquiring the accumulated distance and the number of coordinate value inputs based on the received at least one coordinate value comprises:

computing a difference value between two successively provided coordinate values among the at least one coordinate value and acquiring the accumulated distance by accumulating the computed difference value; and

acquiring the number of coordinate value inputs by counting at least one input coordinate value.

7. The touch input recognition method of claim 5, wherein the determining the inflection point based on the received at least one coordinate value comprises:

determining, when increment/decrement features of first and second coordinate values sequentially received at the given time interval are different from each other, the first coordinate value as the coordinate value of the inflection point.

8. The touch input recognition method of claim 5, wherein the setting, when the predetermined coordinate value of the at least one coordinate value is the coordinate value of the inflection point, the symbol value based on the increment/decrement feature of the at least one coordinate value provided before the predetermined coordinate value comprises:

setting the symbol value based on the increment/decrement feature of the at least one coordinate value provided before the predetermined coordinate value among at least one symbol value preset to correspond to an increment/decrement feature of a coordinate value.

9. The touch input recognition method of claim 5, wherein the acquiring the speed proportion value based on the accumulated distance and the number of coordinate value inputs comprises:

acquiring the speed proportion value by computing the ratio of the accumulated distance to the number of coordinate value inputs.

10. The touch input recognition method of claim 5, wherein the retrieving the event corresponding to the symbol value and the speed proportion value comprises:

generating a symbol array based on the symbol value and the speed proportion value; and

retrieving the symbol array from a database pre-storing an event item to be executed for each of symbol arrays configured with symbol values and speed proportion values.

11. A touch input recognition method comprising:

receiving at least one coordinate value corresponding to a touch trace at a given time interval;

determining an inflection point based on the received at least one coordinate value;

setting, when a predetermined coordinate value of the at least one coordinate value is a coordinate value of the inflection point, a symbol value based on an increment/decrement feature of at least one coordinate value provided before the predetermined coordinate value;

acquiring a length of the touch trace based on the at least one determined inflection point; and

retrieving an event corresponding to the symbol value and the acquired touch trace length.

12. The touch input recognition method of claim 11, wherein the acquiring the length of the touch trace based on the at least one determined inflection point comprises:

computing a distance of each of two neighboring inflection points among the at least one determined inflection point; and

acquiring the length of the touch trace by accumulating the computed distances of the two neighboring inflection points.

13. A touch input recognition method comprising:

receiving at least one coordinate value and a magnitude of a touch input corresponding to a touch trace;

determining an inflection point based on the received at least one coordinate value;

setting, when a predetermined coordinate value of the at least one coordinate value is a coordinate value of the inflection point, a first symbol value based on an increment/decrement feature of at least one coordinate value provided before the predetermined coordinate value;

setting a second symbol value corresponding to the received touch input magnitude; and

setting an execution event corresponding to the set first and second symbol values.

14. The touch input recognition method of claim 13, wherein the determining the inflection point based on the received at least one coordinate value comprises:

determining, when increment/decrement features of first and second coordinate values sequentially received at a given time interval are different from each other, the first coordinate value as the coordinate value of the inflection point.

15. The touch input recognition method of claim 13, wherein the touch input magnitude includes at least one of touch pressure magnitude and capacitance variation corresponding to the touch input.

16. The touch input recognition method of claim 13, wherein the setting the second symbol value corresponding to the received touch input magnitude comprises:

setting the second symbol value based on a result of comparing the touch input magnitude with a preset reference value.

17. The touch input recognition method of claim 13, wherein the setting the execution event corresponding to the set first and second symbol values comprises:

generating a symbol array configured with the first and second symbol values; and

retrieving the generated symbol array from a database storing at least one symbol array and an execution event corresponding to each of the at least one symbol array.

18. A touch input recognition apparatus comprising:

a touch input unit configured to provide at least one coordinate value corresponding to a touch trace at a given time interval;

a storage configured to store at least one of at least one symbol value and a symbol array configured with the at least one symbol value, and an execution event list corresponding to each of the at least one symbol value and the symbol array; and

a controller configured to receive the at least one coordinate value provided at the given time interval, determine an inflection point based on the received at least one coordinate value, set a symbol value based on an increment/decrement feature of a coordinate value provided between inflection points, and read an event corresponding to the set symbol value from the storage.

19. The touch input recognition apparatus of claim 18, wherein when increment/decrement features of first and second coordinate values sequentially received from the touch input unit at the given time interval are different from each other, the controller determines the first coordinate value as a coordinate value of the inflection point.

20. The touch input recognition apparatus of claim 18, wherein the controller generates a symbol array based on the at least one set symbol value, retrieves the generated symbol array from the storage, and reads an event corresponding to the symbol value.

21. The touch input recognition apparatus of claim 18, wherein the controller acquires an accumulated distance between inflection points and the number of coordinate value inputs between the inflection points based on the received at least one coordinate value, and acquires a speed proportion value based on the accumulated distance and the number of coordinate value inputs.

22. The touch input recognition apparatus of claim 21, wherein the controller generates a symbol array configured with the symbol value and the speed proportion value and retrieves the generated symbol array from the storage.

23. The touch input recognition apparatus of claim 21, wherein the controller acquires the speed proportion value by computing the ratio of the accumulated distance to the number of coordinate value inputs.

24. A touch input recognition apparatus comprising:

a touch input unit configured to provide at least one coordinate value and a magnitude of a touch input corresponding to a touch trace at a given time interval;

a storage configured to store at least one of at least one symbol value and a symbol array configured with the at least one symbol value, and an execution event list corresponding to each of the at least one symbol value and the symbol array; and

a controller configured to receive the at least one coordinate value and the touch input magnitude, determine an inflection point based on the received at least one coordinate value, set a symbol value based on an increment/decrement feature of a coordinate value and a touch input magnitude provided between inflection points, and read an event corresponding to the set symbol value from the storage.