User interface apparatus and input acquiring method

1. A user interface apparatus, comprising:

a grip portion to be gripped by an operator;

a contact sensor which is arranged on a surface of the grip portion and which detects a contact position;

a gripping pattern storage unit that stores a gripping pattern representing a contact state, in which the operator grips the grip portion, and which does not correspond to an input operation; and

a processor programmed to:

during at least two different times:

receive sensor information outputted from the contact sensor, and

generate bit map information corresponding to the received sensor information; and

extract a region that does not conform to the stored gripping pattern for each piece of generated bit map information acquired at the at least two different times,

acquire a difference between a plurality of the extracted regions, and

determine that an input operation corresponding to the gripping pattern has been performed when the difference conforms to the gripping pattern, wherein the gripping pattern storage unit acquires the gripping pattern by learning.

2. The user interface apparatus according to claim 1 , wherein the gripping pattern is a predetermined pattern representing a temporal change of a number of regions or a temporal change of the position of a region in which the contact sensor detects contact.

3. The user interface apparatus according to claim 1 , wherein the processor is further programmed to:

extract a region that corresponds to a specific finger of the operator for each piece of generated bit map information acquired at the at east two different times,

acquire a difference between a plurality of the extracted regions that correspond to the specific finger of the operator, and

collate the difference between the plurality of extracted regions that correspond to the specific finger of the operator with the predetermined pattern.

4. The user interface apparatus according to claim 1 , wherein the processor is further programmed to: determine that an input operation is not performed when a variation in a total area of a region, in which the contact sensor detects contact, within a unit time is outside a predetermined range.

5. The user interface apparatus according to claim 1 , wherein the processor is further programmed to: determine that an input operation is not performed when an increase in the number of regions, in which the contact sensor detects contact, within the unit time is greater than a predetermined number.

6. The user interface apparatus according to claim 1 , wherein

the storage unit stores a start pattern and a main pattern, and

the processor is further programmed to: collate the difference between pieces of bit map information with the start pattern, and collate the difference with the main pattern in a subsequent predetermined period after the difference has been determined to conform to the start pattern.

7. The user interface apparatus according to claim 1 , wherein the processor is further programmed to:

store, in the storage unit, an external signal corresponding to an input operation that has been performed, and

transmit the external signal corresponding to an input operation that has been performed to the external device.

8. The user interface apparatus according to claim 1 , wherein the gripping portion is a steering wheel of a vehicle.

9. The user interface apparatus according to claim 8 , wherein the processor is further programmed to:

acquire a rotational angle of the gripping portion, wherein the input operation is an operation for specifying a direction, and

correct a direction of a determined input operation based on the acquired rotational angle of the grip portion and a detection result of the contact sensor.

10. The user interface apparatus according to claim 9 , further comprising: a display, wherein the processor is further programmed to control the display a correction state of an input operation.

11. An input acquiring method performed by a user interface apparatus including a grip portion to be gripped by an operator, a contact sensor which is arranged on a surface of the grip portion and which detects a contact position, and a gripping pattern storing unit that stores a gripping pattern representing a contact state, in which the operator grips the grip portion, and which does not correspond to an input operation, the input acquiring method comprising:

during at least two different times:

receiving sensor information outputted from the contact sensor; and

generating bit map information corresponding to the received sensor information;

extracting a region that does not conform to the stored gripping pattern for each piece of generated bit map information acquired at the at least two different times,

acquiring a difference between pieces of bit map information respectively acquired at the at least two different times, and

determining that an input operation corresponding to the gripping pattern has been performed when the difference conforms to the gripping pattern, wherein the gripping pattern storage unit acquires the gripping pattern by learning.

12. A vehicular input apparatus, comprising:

a steering wheel to be gripped by an operator;

a contact sensor which is arranged on a surface of the steering wheel and which detects a contact position;

a gripping pattern storage unit that stores a gripping pattern representing a contact state, in which the operator grips the grip portion, and which does not correspond to an input operation; and

a processor programmed to:

during at least two different times:

receive sensor information outputted from the contact sensor,

generate bit map information corresponding to the received sensor information;

extract a region that does not conform to the stored gripping pattern for each piece of generated it map information acquired at the at least two different times,

acquire a difference between a plurality of the extracted regions, and

determine that an input operation corresponding to the gripping pattern has been performed when the difference conforms to the gripping pattern, wherein the gripping pattern storage unit acquires the gripping pattern by learning.