CA2429507A1 - Writing guide for a free-form document editor - Google Patents
Writing guide for a free-form document editor Download PDFInfo
- Publication number
- CA2429507A1 CA2429507A1 CA002429507A CA2429507A CA2429507A1 CA 2429507 A1 CA2429507 A1 CA 2429507A1 CA 002429507 A CA002429507 A CA 002429507A CA 2429507 A CA2429507 A CA 2429507A CA 2429507 A1 CA2429507 A1 CA 2429507A1
- Authority
- CA
- Canada
- Prior art keywords
- ink
- handwriting
- detected
- writing
- guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F40/00—Handling natural language data
- G06F40/10—Text processing
- G06F40/166—Editing, e.g. inserting or deleting
- G06F40/171—Editing, e.g. inserting or deleting by use of digital ink
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/18—Extraction of features or characteristics of the image
- G06V30/18086—Extraction of features or characteristics of the image by performing operations within image blocks or by using histograms
- G06V30/18095—Summing image-intensity values; Projection and histogram analysis
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/32—Digital ink
- G06V30/36—Matching; Classification
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
Abstract
Displaying a writing guide for a free-form document editor by detecting electronic ink, classifying the detected ink as corresponding to handwriting or a drawing, and displaying a handwriting guide or a drawing guide in response to classifying the detected ink as handwriting or a drawing, respectively. The writing guides can provide feedback regarding the classification of the detected ink and can be resized as additional ink is detected. The handwriting guide can comprise a writing area, writing guide portion, bullet guide, indent marker, character notches, gesture guide, or sacrificial guide to create meaningful structure within an outline object of an electronic document.
Claims (27)
1. A computer-implemented method for displaying a writing guide for a free-form document editor, comprising the steps of detecting electronic ink comprising an ink stroke;
classifying the detected ink as corresponding to one of handwriting and a drawing; and displaying a handwriting writing guide in response to classifying the detected ink as handwriting.
classifying the detected ink as corresponding to one of handwriting and a drawing; and displaying a handwriting writing guide in response to classifying the detected ink as handwriting.
2. The method according to Claim 1, wherein said classifying step comprises the steps of:
setting a threshold aspect ratio indicating whether the detected ink comprises handwriting or a drawing;
determining a length and height of the detected ink;
computing an ink aspect ratio for the detected ink based on the determined length and height;
determining whether the ink aspect ratio is greater than the threshold aspect ratio; and classifying the detected ink as handwriting in response to a determination that the ink aspect ratio is greater than the threshold aspect ratio.
setting a threshold aspect ratio indicating whether the detected ink comprises handwriting or a drawing;
determining a length and height of the detected ink;
computing an ink aspect ratio for the detected ink based on the determined length and height;
determining whether the ink aspect ratio is greater than the threshold aspect ratio; and classifying the detected ink as handwriting in response to a determination that the ink aspect ratio is greater than the threshold aspect ratio.
3. The method according to Claim 2, further comprising the steps of:
setting a minimum stroke threshold corresponding to a predetermined number of ink strokes to detect in said detecting step before classifying the detected ink as handwriting or a drawing;
determining a detected number of ink strokes for the detected ink; and determining whether the detected number of ink strokes is greater than the minimum stroke threshold, wherein said classifying step is performed in response to a determination that the detected number of ink strokes is greater than the minimum stroke threshold.
setting a minimum stroke threshold corresponding to a predetermined number of ink strokes to detect in said detecting step before classifying the detected ink as handwriting or a drawing;
determining a detected number of ink strokes for the detected ink; and determining whether the detected number of ink strokes is greater than the minimum stroke threshold, wherein said classifying step is performed in response to a determination that the detected number of ink strokes is greater than the minimum stroke threshold.
4. The method according to Claim 3, wherein the minimum stroke threshold comprises a predetermined number of ink strokes for classifying the detected ink as handwriting and a different predetermined number of ink strokes for classifying the detected ink as a drawing.
5. The method according to Claim 1, wherein said handwriting writing guide comprises a writing area into which a user inputs the electronic ink.
6. The method according to Claim 5, wherein said displaying step comprises the step of determining dimensions of the writing area based on a bounding rectangle that encompasses the detected ink.
7. The method according to Claim 6, wherein said step of determining dimensions comprises the step of determining a right, left, top, and baseline dimension of the writing area based on the bounding rectangle that encompasses the detected ink.
8. The method according to Claim 7, wherein said step of determining dimensions further comprises the step of increasing the writing area by adding predetermined spacings to one of the top and baseline dimensions.
9. The method according to Claim 6, wherein said step of determining dimensions comprises the steps of:
creating a histogram representing a distribution of the detected ink on a line;
and calculating the baseline dimension of the writing area based on the histogram.
creating a histogram representing a distribution of the detected ink on a line;
and calculating the baseline dimension of the writing area based on the histogram.
10. The method according to Claim 9, wherein said creating step comprises the steps of:
dividing the line into a plurality of segments;
measuring an amount of the detected ink in each segment; and creating the histogram based on the amount of detected ink in each segment.
dividing the line into a plurality of segments;
measuring an amount of the detected ink in each segment; and creating the histogram based on the amount of detected ink in each segment.
11. The method according to Claim 10, wherein said calculating step comprises the steps of:
setting an ink removal threshold corresponding to an amount of ink below which a segment is removed from the writing area;
determining whether the amount of detected ink in a segment is less than the ink removal threshold; and removing the segment from the writing area to establish the baseline dimension of the writing area in response to a determination that the amount of detected ink in the segment is less that the ink removal threshold.
setting an ink removal threshold corresponding to an amount of ink below which a segment is removed from the writing area;
determining whether the amount of detected ink in a segment is less than the ink removal threshold; and removing the segment from the writing area to establish the baseline dimension of the writing area in response to a determination that the amount of detected ink in the segment is less that the ink removal threshold.
12. The method according to Claim 6, wherein said step of determining dimensions comprises the steps of:
converting a portion of the detected ink to text; and calculating a baseline dimension of the writing area based on the ink-to-text conversion of said converting step.
converting a portion of the detected ink to text; and calculating a baseline dimension of the writing area based on the ink-to-text conversion of said converting step.
13. The method according to Claim 6, further comprising the steps of:
setting a resizing threshold corresponding to an amount of ink outside the writing area for resizing the dimensions of the writing area;
detecting an amount of ink outside the writing area;
determining whether the amount of ink outside the writing area is greater than the resizing threshold; and resizing the writing area dimensions in response to a determination that the amount of ink outside the writing area is greater than the resizing threshold.
setting a resizing threshold corresponding to an amount of ink outside the writing area for resizing the dimensions of the writing area;
detecting an amount of ink outside the writing area;
determining whether the amount of ink outside the writing area is greater than the resizing threshold; and resizing the writing area dimensions in response to a determination that the amount of ink outside the writing area is greater than the resizing threshold.
14. The method according to Claim 6, further comprising the steps of:
setting a resizing threshold corresponding to an amount of ink outside the writing area for resizing the dimensions of the writing area;
establishing a plurality of segments inside and outside the writing area;
detecting an amount of ink in each segment;
determining whether the amount of ink in segments outside the writing area is greater than the resizing threshold; and increasing the writing area dimensions in response to a determination that the amount of ink outside the writing area is greater than the resizing threshold.
setting a resizing threshold corresponding to an amount of ink outside the writing area for resizing the dimensions of the writing area;
establishing a plurality of segments inside and outside the writing area;
detecting an amount of ink in each segment;
determining whether the amount of ink in segments outside the writing area is greater than the resizing threshold; and increasing the writing area dimensions in response to a determination that the amount of ink outside the writing area is greater than the resizing threshold.
15. A computer-implemented method for displaying a writing guide for a free-form document editor, comprising the steps of:
detecting electronic ink;
classifying the detected ink as corresponding to one of handwriting and a drawing; and displaying a handwriting writing guide comprising a writing area into which a user inputs the electronic ink, in response to classifying the detected ink as handwriting.
detecting electronic ink;
classifying the detected ink as corresponding to one of handwriting and a drawing; and displaying a handwriting writing guide comprising a writing area into which a user inputs the electronic ink, in response to classifying the detected ink as handwriting.
16. The method according to Claim 15, wherein said displaying step comprises displaying the handwriting writing guide further comprising a next level indent indicator dividing the writing area into a first level region and a second level region, the first and second level regions corresponding to different levels of a structured outline.
17. The method according to Claim 16, wherein said displaying step comprises displaying the handwriting writing guide further comprising a bullet region corresponding to bullet outline of the structured outline.
18. The method according to Claim 17, further comprising the step of activating the bullet region to display the bullet outline.
19. The method according to Claim 15, wherein said displaying step comprises displaying the handwriting writing guide further comprising character notches that divide the writing area into character boxes for individual characters of a language.
20. The method according to Claim 15, wherein said handwriting writing guide comprises a gesture handwriting writing guide.
21. The method according to Claim 15, wherein said handwriting writing guide comprises a sacrificial handwriting writing guide.
22. The method according to Claim 15, wherein said handwriting writing guide comprises a nested heading handwriting writing guide.
23. A computer-implemented method for displaying a writing guide for a free-form document editor, comprising the steps of:
detecting electronic ink;
classifying the detected ink as corresponding to one of handwriting and a drawing; and displaying a drawing guide in response to classifying the detected ink as a drawing.
detecting electronic ink;
classifying the detected ink as corresponding to one of handwriting and a drawing; and displaying a drawing guide in response to classifying the detected ink as a drawing.
24. The method according to Claim 23, wherein said displaying step comprises the steps of:
determining dimensions of an original bounding rectangle that encompasses the detected ink; and establishing dimensions of the drawing guide based on the original bounding rectangle dimensions.
determining dimensions of an original bounding rectangle that encompasses the detected ink; and establishing dimensions of the drawing guide based on the original bounding rectangle dimensions.
25. The method according to Claim 24, further comprising the steps of:
detecting ink outside the original bounding rectangle;
determining dimensions of a new bounding rectangle that encompasses the ink detected outside the original bounding rectangle; and reestablishing the dimensions of the drawing guide based on the new bounding rectangle dimensions.
detecting ink outside the original bounding rectangle;
determining dimensions of a new bounding rectangle that encompasses the ink detected outside the original bounding rectangle; and reestablishing the dimensions of the drawing guide based on the new bounding rectangle dimensions.
26. The method according to Claim 24, wherein said displaying step further comprises determining dimensions of a hot zone around the original bounding rectangle, and wherein said establishing step comprises establishing the dimensions of the drawing guide based on the bounding rectangle and hot zone dimensions.
27. The method according to Claim 24, further comprising the step of displaying a handwriting writing guide in response to classifying the detected ink as handwriting.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/186,388 | 2002-06-28 | ||
| US10/186,388 US7062090B2 (en) | 2002-06-28 | 2002-06-28 | Writing guide for a free-form document editor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2429507A1 true CA2429507A1 (en) | 2003-12-28 |
| CA2429507C CA2429507C (en) | 2011-03-29 |
Family
ID=29718024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2429507A Expired - Fee Related CA2429507C (en) | 2002-06-28 | 2003-05-26 | Writing guide for a free-form document editor |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US7062090B2 (en) |
| EP (2) | EP1376390B1 (en) |
| JP (1) | JP4486325B2 (en) |
| CA (1) | CA2429507C (en) |
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2002
- 2002-06-28 US US10/186,388 patent/US7062090B2/en not_active Expired - Fee Related
-
2003
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- 2003-05-23 EP EP20140189159 patent/EP2869212A1/en not_active Withdrawn
- 2003-05-26 CA CA2429507A patent/CA2429507C/en not_active Expired - Fee Related
- 2003-06-30 JP JP2003188927A patent/JP4486325B2/en not_active Expired - Fee Related
-
2006
- 2006-05-08 US US11/429,783 patent/US7409089B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004062891A (en) | 2004-02-26 |
| US20060257025A1 (en) | 2006-11-16 |
| EP1376390A3 (en) | 2007-02-28 |
| CA2429507C (en) | 2011-03-29 |
| JP4486325B2 (en) | 2010-06-23 |
| US7062090B2 (en) | 2006-06-13 |
| US20040001627A1 (en) | 2004-01-01 |
| EP1376390A2 (en) | 2004-01-02 |
| EP2869212A1 (en) | 2015-05-06 |
| EP1376390B1 (en) | 2014-12-03 |
| US7409089B2 (en) | 2008-08-05 |
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