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Method and device for reducing positional data dithering and tablet using the same

一种写字板、抖动降低的技术，应用在计算机可读取介质和驱动器,高度因变滤波器领域

Active Publication Date: 2009-05-27
WACOM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considerable effort must be expended to avoid filtering artifacts

Method used

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  • Method and device for reducing positional data dithering and tablet using the same
  • Method and device for reducing positional data dithering and tablet using the same
  • Method and device for reducing positional data dithering and tablet using the same

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Embodiment Construction

[0020] Reference will now be made in detail to the embodiments and methods of the present invention which are illustrated in the drawings, wherein like reference numerals indicate like or corresponding parts throughout. It should be noted, however, that the invention in its broader aspects is not limited to the specific details, representative apparatus and methods, and illustrative examples described and shown in this section along with preferred embodiments and methods. The invention in its various aspects is particularly pointed out and distinctly claimed in the appended claims, read in conjunction with this specification.

[0021] as by comparing figure 1 and 2 And best shown, by tablet 102 when pointer 104 is placed on tablet surface 106 (see Figure 3A and 3B) The received simulated electromagnetic signal 100 is stronger than the signal 100' received by the tablet 102 when the pointer 104 is away from the tablet surface 106. The signal-to-noise ratio (SNR) decreases a...

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PUM

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Abstract

A distance dependent filter for a pointing device or digitizer tablet, a method of reducing jitter in position data of a pointing device, and a computer readable medium are provided. A method of stabilizing positional data in a digitizer tablet associated with a display device for reporting a position of a pointer includes detecting a current location of the pointer with respect to a coordinate grid defined on the tablet and outputting a position signal indicative of the current pointer location. Noise is filtered from the position signal based on at least one filter parameter. A distance between the pointer and a point on the tablet is determined, and an amount of jitter in the position signal is determined based on the determined distance. The at least one filter parameter is adjusted based on the estimated amount of jitter.

Description

technical field [0001] The present invention relates to a method and a device for stabilizing coordinates measured and output by a pointing device or tablet, a pointing device or tablet comprising said device, and a computer-readable computer for carrying out said method Take media and drives. The invention also relates to a height dependent filter that can be used to reduce jitter in a pointing device or tablet. Background technique [0002] A pointing device is a computer peripheral used for drawing or navigating on a computer system. They consist of a flat sensing area and associated indicators. These may be in the form of graphics tablets consisting of a sensor tablet and a pointing tool, usually in the shape of a pen or mouse. Graphic tablet measures X and Y coordinate positions of tools and other parameters such as pen tip pressure, pen tilt angle, pen axis rotation, mouse button, mouse rotation, etc. A user manipulates the tool on the tablet surface to trace, draw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/033G06F3/041G06F3/0346
CPCG06F3/046G06F3/0418G06F3/044G06F3/04186G06F3/04182
Inventor 戴维·C·弗莱克V·塞恩·诺顿三世
Owner WACOM CO LTD