Apparatus, system, and method for data smoothing

An information processing apparatus comprising:

• a display unit;
• a touch sensor unit which is disposed on a screen of the display unit and detects contact of an object on the screen of the display unit;
• an input processing unit that executes:
• an acquisition process of acquiring a plurality of first detection position data on the screen of the display unit detected at predetermined detection intervals by the touch sensor unit as a result of an operation medium contacting the screen of the display unit,
• a calculation process of calculating, based on the plurality of first detection position data, a movement parameter representing movement of the operation medium during detection of the plurality of first detection position data, wherein
• the movement parameter includes a movement speed of the operation medium on the screen of the display unit;
• a selection process of selecting, based on the movement parameter depending on the movement speed, an algorithm of specific smoothing processing from algorithms of a plurality of types of smoothing processing, wherein
• each of the algorithms of the plurality of types of smoothing processing is a process of smoothing a drawn movement locus by noise reduction and differs in processing delay amount indicating a delay between specific first detection position data detected and second detection position data resulting from smoothing-processing the first detection position data, and executing the selected algorithm of smoothing processing, wherein
• the plurality of types of smoothing processing include a first smoothing processing and a second smoothing processing with a lower sample delay count than the first smoothing processing;
• calculation process of calculating the movement speed in units of a predetermined number of samples of the plurality of first detection position;
• switching process of switching the smoothing algorithm different in sample delay count in units of the predetermined number of samples;
• when changing from the first smoothing processing to the second smoothing processing, a transition period of the predetermined number of samples, and, in the transition period of the predetermined number of samples, outputs a weighted average of a processing result of the first smoothing processing and a processing result of the second smoothing processing with a weight of the second smoothing processing being increased as transition progresses, as the second detection position data;
• when changing from the second smoothing processing to the first smoothing processing, a transition period of a sum of the predetermined number of samples and one sample, and, in the transition period of the sum of the predetermined number of samples and one sample, outputs a weighted average of a processing result of the second smoothing processing and a processing result of the first smoothing processing with a weight of the first smoothing processing being increased as transition progresses, as the second detection position data;
• and
• a display processing unit which causes the display unit to display a movement locus on the screen of the display unit as a result of the operation medium moving in contact with the screen of the display unit, based on the second detection position data output from the input processing unit.

A control method of an information processing apparatus including:

• a display unit;
• and a touch sensor unit which is disposed on a screen of the display unit and detects contact of an object on the screen of the display unit, the control method comprising:
• acquiring a plurality of first detection position data on the screen of the display unit detected at predetermined detection intervals by the touch sensor unit as a result of an operation medium contacting the screen of the display unit;
• calculating, based on the plurality of first detection position data, a movement parameter representing movement of the operation medium during detection of the plurality of first detection position data, wherein
• the movement parameter includes a movement speed of the operation medium on the screen of the display unit;
• selecting, based on the movement parameter depending on the movement speed, an algorithm of specific smoothing processing from algorithms of a plurality of types of smoothing processing, wherein
• each of the algorithms of the plurality of types of smoothing processing is a process of smoothing a drawn movement locus by noise reduction and differ in processing delay amount indicating a delay between specific first detection position data detected and second detection position data resulting from smoothing- processing the first detection position data, and executing the selected algorithm of smoothing processing,
• calculating the movement speed in units of a predetermined number of samples of the plurality of first detection position,
• switching the smoothing algorithm different in sample delay count in units of the predetermined number of samples,
• wherein the plurality of types of smoothing processing include first smoothing processing and second smoothing processing with a lower sample delay count than the first smoothing processing;
• when changing from the first smoothing processing to the second smoothing processing, a transition period of the predetermined number of samples, and, in the transition period of the predetermined number of samples, outputs a weighted average of a processing result of the first smoothing processing and a processing result of the second smoothing processing with a weight of the second smoothing processing being increased as transition progresses, as the second detection position data;
• when changing from the second smoothing processing to the first smoothing processing, a transition period of a sum of the predetermined number of samples and one sample, and, in the transition period of the sum of the predetermined number of samples and one sample, outputs a weighted average of a processing result of the second smoothing processing and a processing result of the first smoothing processing with a weight of the first smoothing processing being increased as transition progresses, as the second detection position data;
• and
• causing the display unit to display a movement locus on the screen of the display unit as a result of the operation medium moving in contact with the screen of the display unit, based on the second detection position data.