Wacom Co., Ltd.

Branimir Angelov

Plamen Petkov

Heidi Wang

Stefan Yotov

Boriana Mladenova

Yoshitaka Nakayama

Yoichi Miura

Naoki Watanabe

David Charles Fleck

Masahiko Yamada

Kevin Louis Parkes

An ink file output method is provided, which includes: generating M (M is an integer of 1 or more) pieces of stroke data SD on the basis of event data generated as M input devices move, respectively; generating N (N is an integer of 1 or more and M or less) kinds of logical names LN (metadata) identifying the M number of input devices; generating a metadata block associating the M pieces of stroke data SD with the N kinds of logical names LN; and writing the M pieces of stroke data SD and the metadata block to an ink file.

Ink file searching method, apparatus, and program

A method of outputting digital ink data includes: detecting one or more pieces of stroke data; judging whether the one or more pieces of stroke data form a complete unit of semantics; in a case that the one or more pieces of the stroke data form the complete unit of semantics, aggregating the one or more pieces of stroke data into one message; and outputting the aggregated one or more pieces of stroke data together in the one message.

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

A digital ink generating apparatus is disclosed, which includes: a stroke data generator which, in operation, generates stroke data associated with an input sensor attribute based on pen event data generated by an input sensor when an indicator is operated, a mapping data generator which, in operation, generates mapping data indicative of a transform rule for transforming a value of the input sensor attribute included in the stroke data to a value of one of line width and transparency, and a digital ink assembler which, in operation, outputs, in a determined data format, a digital ink including the stroke data and the mapping data.

Digital ink generating apparatus, method and program, and digital ink reproducing apparatus, method and program

A method of receiving ink data includes: receiving a first fragment of a stroke object in a message associated with a first fragment identifier (ID), receiving a third fragment of the stroke object in a message associated with a third fragment ID, the third fragment ID not being consecutive with the first fragment ID, interpolating a second fragment of the stroke object that is not received based on the first and third fragments of the stroke object, displaying the second fragment of the stroke object that is not received, and after an end of the stroke object is received, transmitting a request for retransmission of the stroke object, the request including a stroke ID of the stroke object.

Methods and systems are provided for generating, rendering, manipulating (e.g., slicing), and communicating stroke objects that form ink data. In a method of generating a stroke object, pen event data indicative of pen down, pen movement, and pen up events are sequentially received to generate point objects that collectively form a stroke object. The point objects serve as control points for interpolating curve segments. Further, a start parameter indicative of a start point within a starting curve segment of the curve segments at which display of the stroke object starts, and an end parameter indicative of an end point within an ending curve segment of at which display of the stroke object ends, are generated for the stroke object. When rendering the stroke object, a system limits display of the stroke object to a range bound by the start and end parameters, as opposed to displaying the entire stroke object.

A method implemented by a computer to output digital ink includes: repeatedly generating a stroke object each time a pointer is removed from a panel, where the stroke object includes control points used to reproduce a stroke made by the pointer on the panel, the stroke starting when the pointer contacts the panel and ending when the pointer is removed from the panel; each time the stroke object is generated, determining a generation time of the stroke object and generating metadata including the generation time of the stroke object; and serializing one piece of ink data, in which the stroke object is associated with the corresponding metadata, into a binary sequence, and outputting the binary sequence.

A method implemented by a transmission device to communicate with multiple reception devices that respectively share a drawing area with the transmission device is provided. The transmission device transmits to the multiple reception devices vector-data ink data representative of traces of input operation detected by an input sensor of the transmission device. The method includes: (a) an ink data generation step of generating fragmented data of a stroke object, wherein the stroke object contains multiple point objects to represent a trace formed by a pointer, the fragmented data being generated per defined unit T, and generating a drawing style object; (b) a message formation step of generating messages including the drawing style object and the fragmented data; and (c) a transmission step of transmitting the messages.

A digital ink coding method includes: a coordinate coding step of acquiring a first binary data indicating a series of sets of x coordinate data and y coordinate data by coding N pieces of position data, each including a set of x coordinate data and y coordinate data acquired in connection with a motion of a pointing device during a period determined by a state of the pointing device; a width coding step of acquiring a second binary data defining widths at positions indicated by N pieces of position data by coding M pieces of width data, where M is an integer equal to or greater than 1 and equal to or smaller than N and the second binary data is separated from the first binary data; and a serialization step of generating a binary stream including the first binary data and the second binary data in mutually different regions.

Digital ink coding method, digital ink decoding method, digital ink data structure, and method of generating file including digital ink

A method implemented in a device including a position input sensor is provided, for generating ink data including stroke objects that are vector data configured to reproduce paths formed by operating a pointer. The method includes generally three step. The first step receives pen event data representative of a user's hand-drawn motion on a sensor surface. The second step generates a stroke object based on the pen event data, generates a metadata object that describes the stroke object based on the pen event data and context information received from an application supporting the pen event data, and generates a drawing style object that defines how to draw the stroke object based on the pen event data and the context information. The third step outputs the stroke object, the metadata object, and the drawing style object in association with each other in a recording format or in a transmission format.

A stylus outputs an output value Pcorresponding to a force Fapplied to a core body of the stylus, and includes an MCU. The MCU sets profile data representing a correspondence relation between a primary pen pressure value Pand the output value Pbased on a characteristic fof a pen pressure detecting portion PD of the stylus. The profile data broadly or indirectly defines a relation h between the force Fand the output value P. The MCU repeatedly obtains the primary pen pressure value Pcorresponding to the force Ffrom the pen pressure detecting portion PD. The MCU, each time the primary pen pressure value Pis obtained, obtains the output value Pfrom the primary pen pressure value Pbased on the profile data and outputs the output value P. The stylus allows for decoupling (isolating) the configuration of the pen pressure detecting portion PD from the output value Poutputted from the stylus.

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Sofia, Bulgaria

Branimir Angelov