COORDINATE DETECTION APPARATUS, IMAGE PROCESSING APPARATUS, COORDINATE DETECTION METHOD, AND PROGRAM

PROBLEM TO BE SOLVED: To prevent unnecessary coordinates from being generated even when a coordinate detection unit and a contact detection unit are combined with each other independently.SOLUTION: An electronic blackboard 2 for detecting coordinates of a position pointed by an electronic pen 4, by...

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Bibliographic Details
Main Author KAGAWA MASAAKI
Format Patent
LanguageEnglish
Japanese
Published 27.07.2017
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Summary:PROBLEM TO BE SOLVED: To prevent unnecessary coordinates from being generated even when a coordinate detection unit and a contact detection unit are combined with each other independently.SOLUTION: An electronic blackboard 2 for detecting coordinates of a position pointed by an electronic pen 4, by means of the electronic pen 4 for pointing a position on a display surface of a display unit 3b includes: a coordinate detection unit 22 for detecting a first event status obtained by operation of the electronic pen 4 and detecting coordinates of the electronic pen 4 on the display surface, when the electronic pen 4 is in contact with, or not in contact with and close to the display surface; a contact detection unit 24 for detecting a second event status obtained by operation of the electronic pen 4 when the electronic pen 4 is in contact with the display surface; and an event distribution unit 25 for extracting valid coordinates for one stroke formed by handwriting operation on the display surface, on the basis of the first event status, the second event status, and the coordinates detected by the coordinate detection unit 22.SELECTED DRAWING: Figure 1 【課題】座標検知部と接触検知部が独立した装置として組み合わせた場合でも、不要な座標の生成を防止する。【解決手段】電子黒板2は、ディスプレイ3bの表示面上の位置を指示するための電子ペン4を用いて、電子ペン4により指示された位置の座標を検知する電子黒板であって、電子ペン4が表示面に接触状態、又は非接触且つ接近状態にあるときに、電子ペン4を用いた操作による第1イベント状況を検知するとともに、表示面上の電子ペン4の座標を検知する座標検知部22と、電子ペン4が表示面に接触状態にあるときに、電子ペン4を用いた操作による第2イベント状況を検知する接触検知部24と、第1イベント状況、第2イベント状況、及び座標検知部22が検知した座標に基づいて、表示面への手書き操作による1つのストロークについての有効な座標を抽出するイベント振分部25と、を備える。【選択図】図1
Bibliography:Application Number: JP20140116604