Information processing apparatus, control method therefor, and program

• US 7,535,461 B2
• Filed: 11/22/2004
• Issued: 05/19/2009
• Est. Priority Date: 12/01/2003
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ito, Masato, Hirota, Makoto
• Primary Examiner(s): Dinh; Duc Q
• Application Number:
  US10/992,756
• Publication Number:
  US 20050116938A1
• Time in Patent Office: 1,639 Days
• Field of Search: 345173-181
• US Class Current: 345/173
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment

Abstract

Input interpretation information describing rules for interpreting the intentions of inputs is held in an indication input interpretation grammar holding unit. An input to a coordinate input region is detected by a pen input detection unit. The intention of an input detected by referring to the input interpretation information is interpreted by a grammar parsing unit. The confidence score of the interpretation result is calculated by a confidence score calculation unit. A certainty-factor-attached N-best output unit outputs the interpretation result together with the confidence score.

Claims

1. An information processing apparatus comprising:

display control means for controlling to display a plurality of regions on a display area;

detection means for detecting an input point of an input to the display area;

calculation means for calculating confidence scores for each of the plurality of regions;

output means for outputting information corresponding to each of the plurality of regions on the basis of the confidence scores, and

selection means for selecting one of information corresponding each of the plurality of regions;

wherein for each of the plurality of regions, the respective confidence score is calculated using a distance between a representative point and the input point detected by said detection means, regardless of whether the input point is included in the region, the representative point being a center or a center of gravity of the region, and

wherein when calculating a confidence score for a region, of the plurality of regions, in which distances between the representative point of the region and boundary points of the region vary, said calculation means calculates the confidence scores by converting input point coordinates on the basis of the ratio of the distances between the representative point of the region and the boundary points of the region, and calculating distance between the representative point of the region and the converted input point coordinates.

2. The apparatus according to claim 1, wherein said calculation means further calculates the confidence score on the basis of a size of the region.

3. The apparatus according to claim 2, wherein said calculation means further calculates the confidence score on the basis of a size of a smallest region among the plurality of regions.

4. The apparatus according to claim 1, further comprising determination means for determining whether the input position of the input point detected by said detection means falls inside or outside the region,

wherein said calculation means calculates the confidence score on the basis of the determination result obtained by said determination means.

5. The apparatus according to claim 1, further comprising decision means for deciding the representative point of the region,

wherein the positional relationship between the region and the input position of the input point detected by said detection means is a distance between the input position and the representative point decided by said decision means.

6. The apparatus according to claim 1, further comprising second display control means for controlling to display information corresponding to the region on the basis of the confidence score output from said output means.

7. The apparatus according to claim 1, further comprising reference means for referring to input interpretation information including a description concerning the plurality of regions,

wherein said calculation means calculates the confidence score on the basis of a relationship between the input and the region which is acquired by using the input interpretation information referred to by said reference means.

8. An information processing method comprising:

a display control step of controlling to display a plurality of regions on a display area;

a detection step of detecting an input point of an input to the display area;

a calculation step of calculating confidence scores for each of the plurality of regions;

an output step of outputting information corresponding to each of the plurality of regions on the basis of the confidence scores, and

a selection step of selecting one of information corresponding each of the plurality of regions;

wherein for each of the plurality of regions, the respective confidence score is calculated using a distance between a representative point and the input point detected in the detection step, regardless of whether the input point is included in the region, the representative point being a center or a center of gravity of the region, and

wherein when calculating a confidence score for a region, of the plurality of regions, in which distances between the representative point of the region and boundary points of the region vary, said calculation step calculates the confidence scores by converting input point coordinates on the basis of the ratio of the distances between the representative point of the region and the boundary points of the region, and calculating distance between the representative point of the region and the converted input point coordinates.

9. A computer-executable program stored in a compute-readable memory, the program comprising code for causing a computer to execute the steps of:

a display control step of controlling to display a plurality of regions on a display area;

a detection step of detecting an input point of an input to the display area;

a calculation step of calculating confidence scores for each of the plurality of regions;

an output step of outputting information corresponding to each of the plurality of regions on the basis of the confidence scores, and

a selection step of selecting one of information corresponding each of the plurality of regions;

wherein for each of the plurality of regions, the respective confidence score is calculated using a distance between a representative point and the input point detected in the detection step, regardless of whether the input point is included in the region, the representative point being a center or a center of gravity of the region, and

wherein when calculating a confidence score for a region, of the plurality of regions, in which distances between the representative point of the region and boundary points of the region vary, said calculation step calculates the confidence scores by converting input point coordinates on the basis of the ratio of the distances between the representative point of the region and the boundary points of the region, and calculating distance between the representative point of the region and the converted input point coordinates.

10. A computer readable storage medium storing a program defined in claim 9.