METHOD AND SYSTEM FOR INK DATA GENERATION, INK DATA RENDERING, INK DATA MANIPULATION AND INK DATA COMMUNICATION

• US 20150378450A1
• Filed: 09/04/2015
• Published: 12/31/2015
• Est. Priority Date: 11/19/2013
• Status: Active Grant

• Current Assignee: Wacom Co Limited (Wacom)
• Original Assignee: Wacom Co Limited (Wacom)
• Inventors: Petkov, Plamen, Angelov, Branimir, Yotov, Stefan, Wang, Heidi, Mladenova, Boriana
• Granted Patent: US 9,430,065 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/0383 Remote input, i.e. interface arrangements in which the signals generated by a pointing device are transmitted to a PC at a remote location, e.g. to a PC in a LAN
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• CPC Class Codes: G06F 3/0346 with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors
• CPC Class Codes: G06F 3/0354 with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0414 using force sensing means to determine a position
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text
• CPC Class Codes: G06Q 10/101 Collaborative creation, e.g. joint development of products or services
• CPC Class Codes: G06T 11/203 Drawing of straight lines or curves
• CPC Class Codes: G06V 30/1423 the instrument generating sequences of position coordinates corresponding to handwriting preprocessing or recognising digital ink G06V30/32
• CPC Class Codes: G06V 30/347 Sampling; Contour coding; Stroke extraction

Abstract

A method is provided for generating ink data including stroke objects. The method includes generally four steps. The first step receives device-dependent user-input data including either one of pen event data of Type 1, which includes indicator position data and indicator pressure data, or pen event data of Type 2, which includes indicator position data but does not include indicator pressure data. The second step determines whether the pen event data is Type 1 or Type 2. The third step derives one or both of radius data for defining a width of the stroke object and transparency data for defining a transparency of the stroke object, based on the pen event data of Type 1 or Type 2. The fourth step outputs the stroke object including said one or both of radius data and transparency data as device-independent common attribute value(s) of each of multiple points of the stroke object in a predetermined format.

Claims

1. A method of generating ink data including stroke objects that are vector data configured to reproduce paths formed by operating a pointer on a position input sensor of a device, the method comprising:

receiving device-dependent user-input data including either one of pen event data of Type 1, which includes indicator position data and indicator pressure data, or pen event data of Type 2, which includes indicator position data but does not include indicator pressure data;

determining whether the pen event data is Type 1 or Type 2;

deriving one or both of radius data for defining a width of the stroke object and transparency data for defining a transparency of the stroke object, based on the indicator pressure data if the pen event data is Type 1, or based on a parameter other than the indicator pressure data if the pen event data is Type 2; and

outputting the stroke object including said one or both of radius data and transparency data as device-independent common attribute value(s) of each of multiple points of the stroke object in a predetermined format.

2. The ink data generating method of claim 1, wherein the step of deriving one or both of radius data and transparency data includes determining radius data for the indicator position data of pen event data of Type 2, which does not include the indicator pressure data, based on said indicator position data and time information regarding when said indicator position data is received as said parameter.

3. The ink data generating method of claim 2, wherein the step of deriving one or both of radius data and transparency data includes deriving a parameter corresponding to indicator velocity at each of the multiple points that form the stroke object based on said indicator position data and time information, and determining the radius data using a function in which, when the parameter corresponding to indicator velocity increases, a value of the radius data decreases.

4. The ink data generating method of claim 3, wherein the step of determining the radius data using a function includes selecting one function out of multiple functions having different characteristics depending on a type of the indicator used to generate the received user-input data.

5. The ink data generating method of claim 3, wherein the step of determining the radius data using a function includes, with respect to beginning and ending points of the stroke object, determining the radius data to be different from a value determined from the function.

6. The ink data generating method of claim 1, wherein the step of deriving one or both of radius data and transparency data includes determining radius data for the indicator position data of pen event data of Type 1, which includes the indicator pressure data, based on said indicator position data, time information regarding when said indicator position data is received, and the indicator pressure data.

7. The ink data generating method of claim 1, wherein the step of deriving one or both of radius data and transparency data includes determining transparency data for the indicator position data of pen event data of Type 2, which does not include the indicator pressure data, based on said indicator position data and time information regarding when said indicator position data is received as said parameter.

10. The ink data generating method of claim 7, wherein the step of outputting the transparency data as device-independent common attribute value(s) of each of multiple points that form the stroke object includes adding an identifier indicative of whether the transparency data is variable in said stroke object.

11. The ink data generating method of claim 7, wherein the step of deriving one or both of radius data and transparency data includes determining transparency data for the indicator position data of pen event data of Type 1, which includes the indicator pressure data, based on said indicator position data, time information regarding when said indicator position data is received, and the indicator pressure data.

12. The ink data generation method of claim 1, wherein the step of deriving one or both of radius data and transparency data includes adjusting values of the one or both of radius data and transparency data based on paper type defined for a canvas object with which the stroke object is associated.

13. The ink data generating method of claim 1, wherein the pen event data of Type 1 further includes indicator angle data indicative of an angle of the indicator relative to the position input sensor, and the step of deriving one or both of radius data and transparency data includes determining radius data based on the indicator angle data if the pen event data is Type 1.

14. The ink data generating method of claim 13, wherein the step of deriving radius data based on the indicator angle data includes using a function in which, when the angle of the indicator relative to the position input sensor becomes closer to a normal to the position input sensor, a value of the radius data increases.

15. The ink data generating method of claim 13, wherein the step of deriving radius data based on the indicator angle data includes using a first function in which, when the angle of the indicator relative to the position input sensor becomes closer to a normal to the position input sensor, velocity of the indicator decreases, and using a second function in which, when the velocity of the indicator decreases, a value of the radius data increases.

16. The ink data generating method of claim 1, wherein the pen event data of Type 1 further includes indicator angle data indicative of an angle of the indicator relative to the position input sensor, and the step of deriving one or both of radius data and transparency data includes determining transparency data based on the indicator angle data if the pen event data is Type 1.

17. The ink data generating method of claim 16, wherein the step of deriving transparency data based on the indicator angle data includes using a function in which, when the angle of the indicator relative to the position input sensor becomes closer to a normal to the position input sensor, a value of the transparency data decreases.

8. The ink data generating method of 7, wherein the step of deriving one or both of radius data and transparency data includes deriving a parameter corresponding to indicator velocity at each of the multiple points that form the stroke object based on said indicator position data and time information, and determining the transparency data using a function in which, when the parameter corresponding to indicator velocity increases, a value of the transparency data increases.

9. The ink data generating method of claim 8, wherein the step of determining the transparency data using a function includes selecting one function out of multiple functions having different characteristics depending on a type of the indicator used to generate the received user-input data.