Method and system for ink data generation, ink data rendering, ink data manipulation and ink data communication

• US 9,875,021 B2
• Filed: 07/15/2016
• Issued: 01/23/2018
• 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
• Primary Examiner(s): McDowell, Jr., Maurice L
• Application Number:
  US15/211,866
• Publication Number:
  US 20160328145A1
• Time in Patent Office: 557 Days
• 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.

Claims

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

receiving, in the processor, 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, in the processor, whether the pen event data is Type 1 or Type 2;

deriving, in the processor, 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, wherein the parameter corresponding to indicator velocity at each of multiple points of the stroke object is derived based on the indicator position data and time information regarding when said indicator position data is received, and the radius data is determined using a function in which, when the parameter corresponding to indicator velocity increases, a value of the radius data decreases, wherein the function is selected out of multiple functions having different characteristics depending on a type of the indicator used to generate the received user-input data; and

outputting, from the processor, 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. A method of generating ink data in a device including a processor which is coupled to memory and to a position input sensor, the ink data including stroke objects that are vector data configured to reproduce paths formed by operating a pointer on the position input sensor, the method comprising:

receiving, in the processor, 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, in the processor, whether the pen event data is Type 1 or Type 2;

deriving, in the processor, 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, wherein the parameter corresponding to indicator velocity at each of multiple points of the stroke object is derived based on the indicator position data and time information regarding when said indicator position data is received, and the radius data is determined using a function in which, when the parameter corresponding to indicator velocity increases, a value of the radius data decreases, wherein with respect to beginning and ending points of the stroke object, the radius data is determined to be different from a value determined from the function; and

outputting, from the processor, 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.

3. A method of generating ink data in a device including a processor which is coupled to memory and to a position input sensor, the ink data including stroke objects that are vector data configured to reproduce paths formed by operating a pointer on the position input sensor, the method comprising:

receiving, in the processor, 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, in the processor, whether the pen event data is Type 1 or Type 2;

deriving, in the processor, 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, wherein the parameter corresponding to indicator velocity at each of multiple points of the stroke object is derived based on the indicator position data and time information regarding when said indicator position data is received, and the transparency data is determined using a function in which, when the parameter corresponding to indicator velocity increases, a value of the transparency data increases, wherein the function is selected out of multiple functions having different characteristics depending on a type of the indicator used to generate the received user-input data; and

outputting, from the processor, 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.

4. A method of generating ink data in a device including a processor which is coupled to memory and to a position input sensor, the ink data including stroke objects that are vector data configured to reproduce paths formed by operating a pointer on the position input sensor, the method comprising:

receiving, in the processor, 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, in the processor, whether the pen event data is Type 1 or Type 2;

deriving, in the processor, 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, from the processor, 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 and an identifier indicative of whether the transparency data is variable in said stroke object.

5. A method of generating ink data in a device including a processor which is coupled to memory and to a position input sensor, the ink data including stroke objects that are vector data configured to reproduce paths formed by operating a pointer on the position input sensor, the method comprising:

receiving, in the processor, 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, in the processor, whether the pen event data is Type 1 or Type 2;

deriving, in the processor, 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, wherein values of the one or both of radius data and transparency data are adjusted based on paper type defined for a canvas object with which the stroke object is associated; and

outputting, from the processor, 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.

6. A method of generating ink data in a device including a processor which is coupled to memory and to a position input sensor, the ink data including stroke objects that are vector data configured to reproduce paths formed by operating a pointer on the position input sensor, the method comprising:

receiving, in the processor, device-dependent user-input data including either one of pen event data of Type 1, which includes indicator position data, indicator pressure data, and indicator angle data indicative of an angle of the indicator relative to the position input sensor, or pen event data of Type 2, which includes indicator position data but does not include indicator pressure data;

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

deriving, in the processor, 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, wherein radius data is determined based on the indicator angle data if the pen event data is Type 1; and

outputting, from the processor, 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.

7. The ink data generating method of claim 6, 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.

8. The ink data generating method of claim 6, 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.

9. A method of generating ink data in a device including a processor which is coupled to memory and to a position input sensor, the ink data including stroke objects that are vector data configured to reproduce paths formed by operating a pointer on the position input sensor, the method comprising:

receiving, in the processor, device-dependent user-input data including either one of pen event data of Type 1, which includes indicator position data, indicator pressure data, and indicator angle data indicative of an angle of the indicator relative to the position input sensor, or pen event data of Type 2, which includes indicator position data but does not include indicator pressure data;

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

deriving, in the processor, 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, wherein transparency data is determined based on the indicator angle data if the pen event data is Type 1; and

outputting, from the processor, 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.

10. The ink data generating method of claim 9, 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.