JP2004017581A - Electronic blackboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic blackboard capable of easily reproducing written content even if the content written of the electronic blackboard is erased. <P>SOLUTION: A character or a figure is written on the entry surface 1 being the writing area in the electronic blackboard and the written content on the entry surface 1 is taken in by scanning the written content by a scanner part 2 being a reader utilizing CCD. The written content is plottend on the entry surface 1 by the recording pen of a plotter part 3 not only to be stored in a memory medium 4 as dot data by color but also to be printed out by a printing part 5. Further, a CPU part 6 controls the data processing convertion for converting the dot data by color of the written content to segment data and the control of all of the scanner part 2, the plotter part 3, the memory medium 4 and the printing part 5. <P>COPYRIGHT: (C)2004,JPO

Description

【００６０】
１）Ａ１の処理
ワークメモリの始点情報をクリアし（データのない状態）、処理Ａ２へ進む（表２）。
【００６１】
【表２】

【００６２】
２）Ａ２の処理
色別メモリの点情報を確認する。色別メモリに点情報が残っているので、処理Ａ３へ進む。
【００６３】
３）Ａ３の処理
ワークメモリの始点情報を確認する。ワークメモリの始点情報が処理Ａ１でクリアされているので、処理Ａ４へ進む。
【００６４】
４）Ａ４の処理
色別メモリ上の任意の点を検索し、見つけた点を始点としてワークメモリの始点情報に入力する。任意の点の検索例として、説明上、（０，０）→（１，０）→…→（７，１）→（０，１）→（１，１）→…として検索していくと仮定する。
【００６５】
ここで、点（３，０）を見つけ、これをワークメモリの始点情報として、処理Ａ５へ進む（表３）。
【００６６】
【表３】

【００６７】
５）Ａ５の処理
色別メモリにおいて、Ａ４の処理で見つけた始点（３，０）を中心にして、周囲に点情報があるか、検索する。検索例として、上→右上→右→…→左上として検索していくと仮定する（表４）。
【００６８】
ここで点（３，１）を見つけ、周囲の点があるので、処理Ａ６へ進む。
【００６９】
【表４】

【００７０】
６）Ａ６の処理
処理Ａ５で見つけた点をワークメモリの終点情報にする。ワークメモリの始点情報（３，０）及び終点情報（３，１）をまとめ、線分情報（３，０−３，１）として記憶し、処理Ａ７へ進む（表５）。
【００７１】
【表５】

【００７２】
７）Ａ７の処理
ワークメモリの始点情報に対応する色別メモリの点情報をクリアし（点がないものとする）、処理Ａ８へ進む（表６）。
【００７３】
【表６】

【００７４】
８）Ａ８の処理
ワークメモリの始点情報に終点情報をコピーして、処理Ａ２へ進む（表７）。
【００７５】
【表７】

【００７６】
９）Ａ２，Ａ３の処理
ワークメモリの始点情報が入っている状態になっている。
【００７７】
処理Ａ２では、色別メモリに点情報があるので、処理Ａ３へ進む。
【００７８】
処理Ａ３では、ワークメモリの始点情報が入っているので、処理Ａ５へ進む。
【００７９】
１０）Ａ５以降の処理
以降、処理を実施し、処理継続後、線分情報として（６，６−６，７）を設定して、始点情報を（６，７）にした後の処理（処理Ａ２）を以下に示す（表８）。
【００８０】
【表８】

【００８１】
１１）Ａ２，Ａ３，Ａ５の処理
処理Ａ２において、色別メモリの点情報を確認する。
【００８２】
色別メモリに点情報が残っているので、処理Ａ３へ進む。処理Ａ３において、ワークメモリの始点情報を確認する。ワークメモリの始点情報が入っているので、処理Ａ５へ進む。処理Ａ５において、点（６，７）の周囲に点情報が存在しないので、処理Ａ９へ進む。
【００８３】
１２）Ａ９の処理
終点情報に始点情報をコピーする。ワークメモリの始点情報及び終点情報をまとめ、線分情報に記憶し、処理Ａ１０へ進む（表９）。
【００８４】
【表９】

【００８５】
１３）Ａ１０の処理
ワークメモリの始点情報に対応する色別メモリの点情報をクリアし、処理Ａ１１へ進む（表１０）。
【００８６】
【表１０】

【００８７】
１４）Ａ１１の処理
ワークメモリの始点情報をクリアする（表１１）。
【００８８】
【表１１】

【００８９】
１５）Ａ２，Ａ３，Ａ４の処理
色別メモリの点情報を確認する。色別メモリに点情報が残っているので、処理Ａ３へ進み、ワークメモリの始点情報を確認する。
【００９０】
ワークメモリの始点情報がクリアされているので、処理Ａ４へ進む。色別メモリ上の任意の点を検索し、見つけた点を始点としてワークメモリの始点情報に入力する。ここで、点（２，２）を見つけ、これをワークメモリの始点情報として、処理Ａ５へ進む（表１２）。
【００９１】
【表１２】

【００９２】
１６）Ａ５以降の処理
処理Ａ５以降、上記に示した通り処理を進めると、最後に線分情報（０，７−０，７）が設定され、処理１１までには色別メモリの点情報がなくなり、ワークメモリの始点情報がクリアされ、以下の状態になる。この状態で、処理Ａ２に処理が移ると、色別メモリの点情報がないため、処理を終了する（表１３）。
【００９３】
【表１３】

【００９４】
なお、終了した状態では、線分情報は、以下の表１４の通りとなる。
【００９５】
【表１４】

【００９６】
図６は記録ペンの色毎による動作を示すフローチャートである。
【００９７】
図６のフローチャートは各色の記録ペンに対して、記録ペンと記入面１の移動並びに記録ペンを記入面１に接触および非接触させる処理を示す。
【００９８】
先ず、今回読み込むデータの有無を判定する（ステップＢ１）。
【００９９】
読み込むデータが無ければ、ステップＢ６に進み、記録ペンを記入面１と非接触状態にして終了する（ステップＢ６）。
【０１００】
ステップＢ１で読み込むデータが有れば、データを読み込む（ステップＢ２）。
【０１０１】
次のステップＢ３は、前回の終点位置と今回の始点位置を比較することにより、前回の終点位置と今回の始点位置が同じかどうかを判定する（ステップＢ３）。
【０１０２】
ステップＢ３で、前回の終点と今回の始点が同じ位置の場合、連続点でありステップＢ５の処理へ進み、記録ペンを記入面に接触したまま今回の終点位置まで移動することにより線分を再生し、ステップＢ１に戻る（ステップＢ５）。
【０１０３】
ステップＢ３で前回の終点と今回の始点が異なる位置の場合、不連続点であるため、ステップＢ４により記録ペンを記入面１と非接触状態にして、今回の始点位置まで記録ペンを移動したのち、記録ペンを記入面１に接触し線分を再生する（ステップＢ４）。
【０１０４】
上述の通り、ステップＢ１は順番に始点と終点の線分情報が読み出せるかどうかを検査し、読み出せる場合はステップＢ２〜ステップＢ５を実施し、読み出せない場合はステップＢ６により記録ペンを非接触状態にして終了する。
【０１０５】
次に図６のフローについて、表１に示すデータ「Ａ」を具体例として用い、図４のフローで説明した処理結果の表１４を利用して動作を詳細に説明する。
【０１０６】
なお、処理を行う上で、始点位置と終点位置及び前回終点位置を記憶するワークメモリが記憶媒体４に必要となる。
１）Ｂ１の処理
最初の処理のため、今回読み込むデータはＮｏ１であるので処理２へ進む（表１５）。
【０１０７】
【表１５】

【０１０８】
２）Ｂ２の処理
最初のデータとしてＮｏ１のデータをワークメモリの始点位置（３，０）に読み込み、処理Ｂ３へ進む（表１６）。
【０１０９】
【表１６】

【０１１０】
３）Ｂ３の処理
最初のデータのため、前回の終点位置は不定であり、始点位置と前回の終点位置は異なるので、処理Ｂ４へ進む。
４）Ｂ４の処理
記録ペンを記入面と非接触状態にして、始点位置（３，０）に記録ペンを移動する。移動後、記録ペンと記入面を接触状態にして、処理Ｂ５へ進む（表１７）。
【０１１１】
【表１７】

【０１１２】
５）Ｂ５の処理
記録ペンを記入面と接触状態のまま、終点位置（３，１）に記録ペンを移動し、処理Ｂ１へ進む（表１８）。
【０１１３】
【表１８】

【０１１４】
６）Ｂ１の処理
前回、Ｎｏ１のデータを読み込んだので、今回は、Ｎｏ２のデータを読み込むことになる。Ｎｏ２のデータは存在するので、処理Ｂ２へ進む。
７）Ｂ２の処理
Ｎｏ２のデータを読み込む。このとき、前回の終点位置を前回の終点位置として記憶し、処理Ｂ３へ進む（表１９）。
【０１１５】
【表１９】

【０１１６】
８）Ｂ３の処理
前回の終点位置と読み込んだ始点位置が同じなので、処理Ｂ５へ進む。
９）Ｂ５の処理
記録ペンを記入面と接触状態のまま終点位置（４，２）に記録ペンを移動し、処理Ｂ１へ進む（表２０）。
【０１１７】
【表２０】

【０１１８】
１０）Ｂ１以降の処理
以降、処理を繰返し、Ｎｏ８のデータを読み込み、処理Ｂ５まで進んだ状態で以下の状態になる。処理Ｂ１へ進む（表２１）。
【０１１９】
【表２１】

【０１２０】
１１）Ｂ１，Ｂ２の処理
前回、Ｎｏ８のデータを読み込んだので、今回はＮｏ９のデータを読み込むことになる。Ｎｏ９のデータは存在するので、処理Ｂ２へ進む。処理Ｂ２でＮｏ９のデータを読み込む。
【０１２１】
このとき、前回の終点位置を前回の終点位置として記憶する。処理Ｂ３へ進む（表２２）。
【０１２２】
【表２２】

【０１２３】
１２）Ｂ３，Ｂ４の処理
始点位置と前回終点位置は異なるので、処理Ｂ４へ進む。記録ペンを記入面と非接触状態にして、始点位置に記録ペンを移動する。
【０１２４】
移動後、記録ペンと記入面を接触状態にして処理Ｂ５へ進む。非接触状態での移動のため、記入面に線は描かれない（表２３）。
【０１２５】
【表２３】

【０１２６】
１３）Ｂ５以降の処理
記録ペンを記入面と接触状態のまま、終点位置に記録ペンを移動し、処理Ｂ１へ進む。
【０１２７】
以降、処理を繰返し、Ｎｏ１７のデータを読み込み、処理Ｂ５まで進んだ状態で以下の状態になる（表２４）。
【０１２８】
【表２４】

【０１２９】
この次の処理（処理Ｂ１）では、以降に読み込むデータがないので、処理Ｂ６へ進み、記録ペンを記入面と非接触状態にして終了する。
【０１３０】
図４及び図６のフロー動作の説明は以上の通りである。
【０１３１】
さて次に、本発明の電子黒板の第２の実施の形態として、図１の構成にイメージスキャナを追加することにより、電子黒板の記入面１に筆記した内容のほか、図面や書類をイメージスキャナから取り込み、取り込んだデータの点情報を線分情報に変換して記入面１に表示させることが可能となる。
【０１３２】
また、パーソナルコンピュータで作成した画像やデジタルカメラにより撮影した画像を記憶媒体４から読み込み、読み込んだデータの点情報を線分情報に変換して電子黒板の記入面１に表示させることが可能となる。
【０１３３】
上述の通り本発明は、電子黒板において、筆記した内容を消去した後でも新たに電子黒板上に再生できるようにしたもので、スキャナ部２は電子黒板上の記入面１に筆記された内容を色別に読み込む。色別に読み込まれたデータは、ＣＰＵ部６により記憶媒体４の色別メモリに点の図形情報として記憶される。
【０１３４】
メモリの点情報をＣＰＵ部６により連続点であるかどうかを検索し、連続点を線分として記憶する。このとき、線分として記憶した点情報は点無し情報にメモリを書き換える。この処理をメモリ上から点情報が無くなるまで繰り返し、全ての点情報を線分情報に変換する。この線分情報を記憶媒体４に記録する。記憶媒体４に記録した線分情報を読み出し、プロッタ部３の記録ペンにより電子黒板上の記入面１に筆記した内容を再生することになる。
【０１３５】
【発明の効果】
以上説明したように、本発明の電子黒板は、記入面に筆記された内容を線分データに変換することで、電子黒板に筆記した内容が消去された場合でも、筆記内容が容易に再生できるという効果を有している。
【図面の簡単な説明】
【図１】本発明の電子黒板の一つの実施の形態を示す斜視図である。
【図２】電子黒板記入面の読み込み点を説明する図である。
【図３】電子黒板記入面の色別の読み込み点を説明する図である。
【図４】本発明の電子黒板の筆記内容の処理動作を示すフローチャートである。
【図５】記入面の始点情報の検索を示す図である。
【図６】記録ペンの色毎による動作を示すフローチャートである。
【符号の説明】
１　　記入面
２　　スキャナ部
３　　プロッタ部
４　　記憶媒体
５　　印字部
６　　ＣＰＵ部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic blackboard, and more particularly, to an electronic blackboard in which written content is reproduced even after the content written on the electronic blackboard is erased.
[0002]
[Prior art]
2. Description of the Related Art Recently, electronic blackboards have been widely used in which, at meetings and the like, the contents of agenda are written on a writing surface of a white board with a writing pen in the same manner as a blackboard, and the written contents are printed out on recording paper by applying facsimile technology. If the written content is erased due to interruption of the meeting or the like, the electronic blackboard must be handwritten again when the meeting is resumed.
[0003]
Also, if the written contents are deleted without printing out on the recording paper, the contents of the meeting itself will be lost.
[0004]
In other words, the conventional electronic blackboard cannot be reproduced if the writing on the entry surface is erased.
[0005]
As an example of such a technique, for example, a “display device” described in Japanese Utility Model Application Laid-Open No. 63-097950 is known.
[0006]
This publication describes a technique of reading point (dot) information constituting a character / graphic on an entry surface and drawing the character / graphic on a blackboard based on the point (dot) information.
[0007]
[Problems to be solved by the invention]
The above-described conventional electronic blackboard has a disadvantage that the written content cannot be reproduced if an entry written on the entry surface of the electronic blackboard is erased.
[0008]
In addition, although point (dot) information constituting a character / figure on an entry surface is read, it has a drawback that it cannot be easily reproduced on the entry surface because the dot (dot) information remains as it is.
[0009]
An object of the present invention is to provide an electronic blackboard in which the written contents can be easily reproduced even when the contents written on the electronic blackboard are erased.
[0010]
[Means for Solving the Problems]
A first electronic blackboard according to the present invention has an entry surface for writing characters and figures, scanning means for scanning and taking in the written contents of the entry surface, and drawing means for plotting the written contents on the entry surface with a recording pen. Storage means for storing the handwritten content, printing means for printing out the stored handwritten content, and data conversion means for converting the stored point information of the handwritten content into line segment information. I have.
[0011]
A second electronic blackboard according to the present invention includes a writing surface for writing characters and graphics, a scanner unit for scanning and reading the writing contents of the writing surface, and a plotter unit for plotting the writing contents on the writing surface with a recording pen. A storage medium for storing the written content, a printing unit for printing out the stored written content, and a CPU (Central Processor Unit) for performing a data conversion process for converting the stored point information of the written content into line segment information. And a part.
[0012]
The third electronic blackboard of the present invention is the second electronic blackboard,
The scanner unit,
A reading device using a CCD (Charge Coupled Device) is characterized in that the entire surface of the writing surface is scanned by moving the CCD of the scanner unit in the horizontal direction and moving the writing surface in the vertical direction.
[0013]
According to a fourth electronic blackboard of the present invention, in the second or third electronic blackboard,
Holding the recording pen, moving the recording pen in the horizontal direction, moving the writing surface in the vertical direction, and contacting and non-contacting the recording pen with the writing surface, thereby plotting the written contents. And
[0014]
A fifth electronic blackboard according to the present invention is the electronic blackboard according to any of the second to fourth electronic blackboards,
The storage medium,
It is characterized in that the written contents of the entry surface are stored in a memory as dot information for each color.
[0015]
A sixth electronic blackboard of the present invention is the electronic blackboard according to any one of the second to fifth aspects,
The CPU unit includes:
The color signal for each square read by the scanner unit, the horizontal position of the scanner unit and the vertical position of the writing surface are detected, and the point information for each color on the square of the writing surface is stored. It is stored in a memory for each color of the medium corresponding to the squares of the entry surface, converts the point information for each color into line segment information for each memory for each color, and records it on the recording medium. I have.
[0016]
According to a seventh electronic blackboard of the present invention, in the second electronic blackboard,
The contents written on the entry surface of the electronic blackboard are read by moving the scanner section in the horizontal direction and the entry surface in the vertical direction, and by this reading operation, the written content on the entry surface is divided into squares and colored for each square. Convert to another signal and transfer to CPU
The CPU unit detects the color-specific signal for each square, the horizontal position of the scanner unit, and the vertical position of the writing surface, and stores point information for each color on the square of the writing surface in a storage medium. Stored in the memory for each color corresponding to the squares of the entry surface, convert the dot information for each color stored in the memory into line segment information, and record it on the recording medium,
The written contents are reproduced by moving the recording pen corresponding to each color in the horizontal direction and the writing surface in the vertical direction based on the line segment information.
[0017]
An eighth electronic blackboard of the present invention includes:
A writing surface for writing characters / graphics, a scanner unit for scanning and taking in the writing contents of the writing surface, a plotter unit for plotting the writing contents on the writing surface with a recording pen, and a storage medium for storing the writing contents An electronic blackboard comprising: a printing unit that prints out the stored writing contents; and a CPU (Central Processor Unit) unit that performs a data conversion process of converting the stored point information of the writing contents into line segment information. ,
A clearing step (A1) for clearing the starting point information of the entry surface;
It is searched whether or not point information remains in the memory for each color of the storage medium. If there is no point information, the process is terminated. If point information remains, the point information proceeds to the next start point information clear determination step (A3). A search step (A2);
It is determined whether the start point information is cleared. If the start point information is cleared, a new start point is set in the next new start point setting step (A4). If the start point information is not cleared, the previous end point is determined. Starting point information clear determination step (A3), which is processed as a starting point, and proceeds to the peripheral search step (A5);
A new starting point setting step (A4) in which the presence or absence of a point is searched from the end of the memory to newly set a starting point, and the point found first is set as a starting point;
Said peripheral search step (A5) for searching around the start point and determining whether or not the start point exists;
When there is a point around the start point in the peripheral search step (A5), a line segment information storage step (A6) of storing information of the start point and the end point as line segment information with a point next to the first point found first as an end point; ;
A color point information clearing step (A7) for clearing the point information in the color memory corresponding to the start point information;
Then, a point information copy step (A8) in which the end point information is copied to the start point information and the process returns to the point information search step (A2);
A line segment storing step (A9) for copying the start point information to the end point information and storing the information of the start point and the end point as a line segment if there is no point around the start point in the peripheral search step (A5);
A memory-by-color clearing step (A10) for clearing the point information of the memory by color corresponding to the start point information;
Thereafter, a start point information clearing step (A11) for clearing the start point information and returning to the point information searching step (A2);
The method is characterized by a writing content processing method provided with:
[0018]
According to a ninth electronic blackboard of the present invention, in the eighth electronic blackboard,
A determination step (B1) for determining whether or not there is data to be read this time;
If there is no data to be read, an end step (B6) of terminating the recording pen in a non-contact state with the writing surface and terminating;
A read step (B2) for reading data if there is data to be read in the determination step (B1);
A position determining step (B3) of comparing the previous end point position with the current start point position to determine whether the previous end point position is the same as the current start point position;
In this position determination step (B3), if the previous end point and the current start point are different positions, they are discontinuous points. Therefore, after the recording pen is moved out of contact with the writing surface in the non-contact state, the recording pen is moved to the current start point position. Contacting the recording pen with the writing surface (B4);
In the position determination step (B3), if the previous end point and the current start point are the same position, they are continuous points, and the line segment is reproduced by moving the recording pen to the current end point position while keeping the recording pen in contact with the writing surface. A line segment reproduction step (B5) returning to the determination step (B1);
The method is characterized by a writing content processing method provided with:
[0019]
A tenth electronic blackboard according to the present invention is the electronic blackboard according to any of the second to seventh electronic blackboards,
By adding an image scanner, drawings and documents are taken in from the image scanner, and point information of the taken-in data is converted into line segment information and displayed.
[0020]
An eleventh electronic blackboard according to the present invention is the electronic blackboard according to any of the second to seventh electronic blackboards,
It is characterized in that an image created by a personal computer and an image taken by a digital camera are read, and the point information of the read data is converted into line segment information and displayed.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0022]
FIG. 1 is a perspective view showing one embodiment of an electronic blackboard of the present invention.
[0023]
The present embodiment shown in FIG. 1 has an entry surface 1 for writing characters and figures on an electronic blackboard, a scanner unit 2 for scanning and taking in the written contents of the entry surface 1, and a recording pen (not shown) on the entry surface 1. A plotter unit 3 for plotting the written contents, a storage medium 4 for storing the written contents, a printing unit 5 for printing out the written contents, and a CPU unit 6 for performing data processing conversion and overall control of the written contents. It is configured.
[0024]
Next, the operation will be described with reference to FIG.
[0025]
The writing surface 1 of the electronic blackboard is a portion to be written on the electronic blackboard, and rewriting and correction are performed by a writing pen and an eraser of each color which are usually used.
[0026]
The scanner unit 2 is a reading device using a CCD (Charge Coupled Device: not shown). By moving the CCD of the scanner unit 2 in the Y direction (horizontal direction) and moving the writing surface 1 in the X direction (vertical direction), The entire surface of the entry surface 1 of the electronic blackboard can be scanned.
[0027]
The plotter unit 3 holds a recording pen of the same color as the writing pen, replaces the recording pen, moves the recording pen in the Y direction, moves the writing surface 1 in the X direction, and contacts and non-contacts the recording pen with the writing surface 1. Then, the written contents are reproduced by plotting.
[0028]
Normally, at a meeting or the like, the contents of the agenda are written on the entry surface 1 of the electronic blackboard using a writing pen, but cannot be reproduced after being erased by the eraser. When the written contents are reproduced on the entry surface 1, the written contents need to be stored, and the stored written contents need to be plotted by the recording pen of the plotter unit 3.
[0029]
The storage medium 4 stores the written contents on the entry surface 1 of the electronic blackboard in the memory as dot information for each color. In addition, as the storage medium 4, a floppy disk, a card type memory, a fixed disk for assembling, and the like which can be easily carried are used.
[0030]
The printing unit 5 prints out the written content by the writing pen or the written content reproduced by the recording pen.
[0031]
The CPU section 6 processes and converts the data of the written content read by the scanner section 2, performs recording and reproduction on the storage medium 4, and performs overall control of the scanner section 2, the plotter section 3, and the printing section 5.
[0032]
The writing surface 1 of the electronic blackboard is configured to operate so as to be wound in the X direction. However, the writing surface 1 is fixed, and the main body of the scanner unit 2 and the plotter unit 3 is moved not only in the Y direction but also in the X direction. It may be configured to operate in both directions.
[0033]
FIG. 2 is a diagram for explaining reading points on the electronic blackboard entry surface.
[0034]
FIG. 3 is a view for explaining reading points of the electronic blackboard entry surface for each color.
[0035]
FIG. 4 is a flowchart showing a processing operation of writing contents of the electronic blackboard of the present invention.
[0036]
FIG. 5 is a diagram showing the search for the entry point information of the entry surface.
[0037]
Next, the operation of the present embodiment will be described in more detail with reference to FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG.
[0038]
The contents written on the writing surface 1 of the electronic blackboard are read by scanning the entire writing surface 1 by moving the CCD of the scanner unit 2 in the Y direction and moving the writing surface 1 in the X direction.
[0039]
As a result of this reading operation, the written contents of the entry surface 1 are divided into squares as shown in FIG. 2, converted into color-specific signals for each square, and transferred to the CPU unit 6.
[0040]
The CPU section 6 detects the color-specific signal for each cell, the Y-direction position of the CCD, and the X-direction position of the writing surface 1. As shown in FIG. 3, the red, blue, green, and black dot information on the cells of the entry surface 1 are stored in the color memories of the storage medium 4 corresponding to the colors in correspondence with the cells of the entry surface 1.
[0041]
Next, the point information stored in the color memory is subjected to the processing shown in FIG. 4 for each memory for each color, and the point information for each color is converted into line segment information. This line segment information is recorded on the recording medium 4 and can be read.
[0042]
The plotter unit 3 moves the recording pen corresponding to each color of the writing pen in the Y direction and the writing surface 1 in the X direction based on the line segment information, and plots the recording pen 1 in contact with and non-contact with the writing surface. Play the written content.
[0043]
The flowchart of FIG. 4 is a process executed for each color written on the entry surface 1 of the electronic blackboard, and shows a process of converting point information into line segment information of a start point and an end point.
[0044]
To explain the operation of FIG. 4, first, the starting point information of the entry surface 1 is cleared (step A1).
[0045]
Next, whether or not point information remains in the color memory of the storage medium 4 is searched. If there is no point information, the process is terminated. If point information remains, the process proceeds to the next step (step A2).
[0046]
In step A3, it is determined whether or not the start point information has been cleared. If the start point information has been cleared, the start point is newly set in step A4. If the start point information has not been cleared, the previous end point is set as the start point. And the process proceeds to step A5 (step A3).
[0047]
In step A4, the presence or absence of a point is searched from the end of the memory in order to newly set the start point, and the point found first is set as the start point (step A4).
[0048]
In step A5, a search is made around the start point to determine whether or not the start point exists. Here, as shown in FIG. 5, eight locations around the start point are searched, and the presence or absence of the point is checked.
[0049]
If there is a point around the start point in step A5, the information on the start point and the end point is stored as line segment information with the point next to the first found start point as the end point (step A6).
[0050]
Next, the point information in the memory for each color corresponding to the start point information is cleared (step A7).
[0051]
Thereafter, the end point information is copied to the start point information, and the process returns to step A2 (step A8).
[0052]
If there is no point around the start point in step A5, the start point information is copied to the end point information, and the information of the start point and the end point is stored as a line segment (step A9).
[0053]
In the next step, the point information in the memory for each color corresponding to the start point information is cleared (step A10).
[0054]
Thereafter, the start point information is cleared, and the process returns to step A2 (step A11).
[0055]
As described above, when there is a point around the start point, the processing of steps A6 to A8 is performed as a continuous point. When there is no point around the start point, the processing of steps A9 to A11 is performed as a discontinuous point. I do.
[0056]
Note that this processing is unnecessary when this point information is the end point of the continuous line segment, but when this point information is only the point, this point is not reproduced unless this processing is performed.
[0057]
Next, the operation of the memory for each color will be described in detail with reference to the flow of FIG. 4 using the data “A” shown in Table 1 as a specific example.
[0058]
In performing the processing, a work memory for storing start point information and end point information and a memory for storing line segment information are required. The work memory and the line segment memory are preset in the storage medium 4 as a memory map.
[0059]
[Table 1]

[0060]
1) Processing of A1 The start point information of the work memory is cleared (there is no data), and the process proceeds to processing A2 (Table 2).
[0061]
[Table 2]

[0062]
2) Check the point information in the memory for each processing color of A2. Since point information remains in the memory for each color, the process proceeds to processing A3.
[0063]
3) Check the start point information of the processing work memory of A3. Since the start point information of the work memory has been cleared in the process A1, the process proceeds to the process A4.
[0064]
4) An arbitrary point on the memory for each processing color of A4 is searched, and the found point is input to the starting point information of the work memory as a starting point. As an example of searching for an arbitrary point, for the sake of explanation, the search is performed as (0,0) → (1,0) →... → (7,1) → (0,1) → (1,1) →. Assume.
[0065]
Here, the point (3, 0) is found, and the process proceeds to the process A5 using this as start point information of the work memory (Table 3).
[0066]
[Table 3]

[0067]
5) In the memory for the processing color of A5, a search is made to see if there is point information around the starting point (3, 0) found in the processing of A4. As a search example, it is assumed that the search is performed in the order of top → upper right → right →... → upper left (Table 4).
[0068]
Here, the point (3, 1) is found, and since there are surrounding points, the process proceeds to the process A6.
[0069]
[Table 4]

[0070]
6) Processing of A6 The point found in processing A5 is used as the end point information of the work memory. The start point information (3,0) and end point information (3,1) of the work memory are collected and stored as line segment information (3,0-3,1), and the process proceeds to processing A7 (Table 5).
[0071]
[Table 5]

[0072]
7) Processing of A7 The point information in the memory for each color corresponding to the start point information of the work memory is cleared (it is assumed that there is no point), and the process proceeds to processing A8 (Table 6).
[0073]
[Table 6]

[0074]
8) Processing of A8 The end point information is copied to the start point information of the work memory, and the process proceeds to the processing A2 (Table 7).
[0075]
[Table 7]

[0076]
9) Processing of A2 and A3 The starting point information of the work memory is stored.
[0077]
In the process A2, since there is point information in the color memory, the process proceeds to the process A3.
[0078]
In process A3, since the start point information of the work memory is included, the process proceeds to process A5.
[0079]
10) After the process from A5, the process is performed. After the process is continued, (6, 6-6, 7) is set as the line segment information, and the process after the start point information is set to (6, 7) (process) A2) is shown below (Table 8).
[0080]
[Table 8]

[0081]
11) Processing of A2, A3, and A5 In processing A2, point information in the memory for each color is confirmed.
[0082]
Since point information remains in the memory for each color, the process proceeds to processing A3. In process A3, the start point information of the work memory is confirmed. Since the start information of the work memory is included, the process proceeds to processing A5. In the process A5, since there is no point information around the point (6, 7), the process proceeds to the process A9.
[0083]
12) Copy the start point information to the processing end point information of A9. The start point information and the end point information of the work memory are collected and stored as line segment information, and the process proceeds to process A10 (Table 9).
[0084]
[Table 9]

[0085]
13) Processing of A10 The point information of the memory for each color corresponding to the starting point information of the work memory is cleared, and the process proceeds to the processing A11 (Table 10).
[0086]
[Table 10]

[0087]
14) Clear the start point information of the processing work memory of A11 (Table 11).
[0088]
[Table 11]

[0089]
15) Check the point information in the memory for each processing color of A2, A3 and A4. Since the point information remains in the memory for each color, the process proceeds to process A3, and the start point information of the work memory is confirmed.
[0090]
Since the start point information of the work memory has been cleared, the process proceeds to processing A4. An arbitrary point on the memory for each color is searched, and the found point is input to the starting point information of the work memory as a starting point. Here, the point (2, 2) is found, and the process proceeds to the process A5 using this as the start point information of the work memory (Table 12).
[0091]
[Table 12]

[0092]
16) Processing after A5 If the processing proceeds as described above after A5, the line segment information (0, 7-0, 7) is finally set. Disappears, the start point information of the work memory is cleared, and the state becomes as follows. In this state, when the process proceeds to the process A2, the process ends because there is no point information in the memory for each color (Table 13).
[0093]
[Table 13]

[0094]
In the completed state, the line segment information is as shown in Table 14 below.
[0095]
[Table 14]

[0096]
FIG. 6 is a flowchart showing the operation for each color of the recording pen.
[0097]
The flowchart of FIG. 6 shows the process of moving the recording pen and the writing surface 1 with respect to the recording pens of each color, and bringing the recording pen into and out of contact with the writing surface 1.
[0098]
First, it is determined whether there is data to be read this time (step B1).
[0099]
If there is no data to be read, the process proceeds to step B6, where the recording pen is brought into a non-contact state with the writing surface 1, and the process ends (step B6).
[0100]
If there is data to be read in step B1, the data is read (step B2).
[0101]
In the next step B3, it is determined whether or not the previous end point position is the same as the current start point position by comparing the previous end point position with the current start point position (step B3).
[0102]
In step B3, if the previous end point and the current start point are at the same position, it is a continuous point and the process proceeds to step B5, and the line segment is reproduced by moving to the current end point position while keeping the recording pen in contact with the writing surface. Then, the process returns to step B1 (step B5).
[0103]
If the previous end point is different from the current start point in step B3, it is a discontinuous point. Therefore, in step B4, the recording pen is brought into non-contact with the writing surface 1 and the recording pen is moved to the current start point position. Then, the recording pen is brought into contact with the writing surface 1 to reproduce a line segment (step B4).
[0104]
As described above, step B1 sequentially checks whether the line segment information of the start point and the end point can be read. If the line segment information can be read, steps B2 to B5 are performed. The state is brought into the contact state, and the processing ends.
[0105]
Next, the operation of the flow of FIG. 6 will be described in detail using the data “A” shown in Table 1 as a specific example and using Table 14 of the processing result described in the flow of FIG.
[0106]
In performing the processing, a work memory for storing the start point position, the end point position, and the previous end point position is required in the storage medium 4.
1) Processing of B1 Since the data to be read this time is No. 1 for the first processing, the processing proceeds to processing 2 (Table 15).
[0107]
[Table 15]

[0108]
2) Processing of B2 Data No. 1 is read into the start point (3, 0) of the work memory as the first data, and the process proceeds to processing B3 (Table 16).
[0109]
[Table 16]

[0110]
3) Processing of B3 Since the first data is the first data, the previous end point position is indefinite, and the start point position is different from the previous end point position.
4) Process B4 The recording pen is moved out of contact with the writing surface to the starting point (3, 0). After the movement, the recording pen and the writing surface are brought into contact with each other, and the process proceeds to processing B5 (Table 17).
[0111]
[Table 17]

[0112]
5) Processing of B5 With the recording pen in contact with the writing surface, the recording pen is moved to the end position (3, 1), and the processing proceeds to processing B1 (Table 18).
[0113]
[Table 18]

[0114]
6) Processing of B1 Since the data of No1 was read last time, the data of No2 is read this time. Since the data of No2 exists, the process proceeds to processing B2.
7) Read the data of process No. 2 of B2. At this time, the previous end point position is stored as the previous end point position, and the process proceeds to processing B3 (Table 19).
[0115]
[Table 19]

[0116]
8) Process B3 Since the previous end point position and the read start point position are the same, the process proceeds to process B5.
9) Processing of B5 The recording pen is moved to the end point (4, 2) while keeping the recording pen in contact with the writing surface, and the process proceeds to processing B1 (Table 20).
[0117]
[Table 20]

[0118]
10) After the process from B1 onward, the process is repeated, the data of No. 8 is read, and the process proceeds to the process B5 to be in the following state. Proceed to process B1 (Table 21).
[0119]
[Table 21]

[0120]
11) Processing of B1 and B2 Since the data of No. 8 was read last time, the data of No. 9 is read this time. Since the data of No. 9 exists, the process proceeds to processing B2. In the process B2, the data No. 9 is read.
[0121]
At this time, the previous end point position is stored as the previous end point position. Proceed to process B3 (Table 22).
[0122]
[Table 22]

[0123]
12) Since the processing start point positions of B3 and B4 are different from the previous end point position, the process proceeds to processing B4. The recording pen is moved out of contact with the writing surface to the starting point position.
[0124]
After the movement, the recording pen and the writing surface are in contact with each other, and the process proceeds to processing B5. No line is drawn on the entry surface due to the non-contact movement (Table 23).
[0125]
[Table 23]

[0126]
13) Processing after B5 With the recording pen in contact with the writing surface, the recording pen is moved to the end position, and the process proceeds to processing B1.
[0127]
Thereafter, the process is repeated, the data of No. 17 is read, and the process proceeds to the process B5 to be in the following state (Table 24).
[0128]
[Table 24]

[0129]
In the next process (process B1), since there is no data to be read subsequently, the process proceeds to process B6, where the recording pen is brought into a non-contact state with the writing surface, and the process ends.
[0130]
The description of the flow operation in FIGS. 4 and 6 is as described above.
[0131]
Next, as a second embodiment of the electronic blackboard of the present invention, by adding an image scanner to the configuration of FIG. 1, in addition to the contents written on the entry surface 1 of the electronic blackboard, drawings and documents can be image-scanned. , The point information of the fetched data can be converted into line segment information and displayed on the entry surface 1.
[0132]
Further, it is possible to read an image created by a personal computer or an image taken by a digital camera from the storage medium 4, convert the point information of the read data into line segment information, and display it on the entry surface 1 of the electronic blackboard. .
[0133]
As described above, the present invention enables the electronic blackboard to be newly reproduced on the electronic blackboard even after erasing the written contents, and the scanner unit 2 reads the contents written on the entry surface 1 on the electronic blackboard. Read by color. The data read for each color is stored by the CPU section 6 in the color memory of the storage medium 4 as graphic information of points.
[0134]
The point information in the memory is searched by the CPU unit 6 as to whether or not it is a continuous point, and the continuous point is stored as a line segment. At this time, the point information stored as the line segment rewrites the memory to the pointless information. This process is repeated until there is no more point information from the memory, and all point information is converted into line segment information. This line segment information is recorded on the storage medium 4. The line segment information recorded on the storage medium 4 is read out, and the content written on the entry surface 1 on the electronic blackboard by the recording pen of the plotter unit 3 is reproduced.
[0135]
【The invention's effect】
As described above, the electronic blackboard of the present invention can easily reproduce the written content even if the content written on the electronic blackboard is erased by converting the content written on the entry surface into line segment data. This has the effect.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of an electronic blackboard of the present invention.
FIG. 2 is a diagram for explaining reading points on an electronic blackboard entry surface.
FIG. 3 is a diagram for explaining reading points for each color on an electronic blackboard entry surface.
FIG. 4 is a flowchart showing a processing operation of writing contents of the electronic blackboard of the present invention.
FIG. 5 is a diagram illustrating a search for entry point information of an entry surface.
FIG. 6 is a flowchart illustrating an operation for each color of a recording pen.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Writing surface 2 Scanner part 3 Plotter part 4 Storage medium 5 Printing part 6 CPU part

Claims (11)

An entry surface for writing characters / graphics, scanning means for scanning and taking in the written content of the entry surface, drawing means for plotting the written content on the entry surface with a recording pen, and storage means for storing the written content An electronic blackboard comprising: a printing unit that prints out the stored writing content; and a data conversion unit that converts point information of the stored writing content into line segment information. A writing surface for writing characters and figures, a scanner unit for scanning and taking in the writing contents of the writing surface, a plotter unit for plotting the writing contents on the writing surface with a recording pen, and a storage medium for storing the writing contents And a CPU (Central \ Processor \ Unit) unit for performing data conversion processing for converting the stored point information of the written content into line segment information. Electronic blackboard. The scanner unit,
3. A scanning apparatus using a CCD (Charge Coupled Device), wherein the entire surface of the writing surface is scanned by moving the CCD of the scanner unit in the horizontal direction and moving the writing surface in the vertical direction. Electronic blackboard with description. The plotter section includes:
Holding the recording pen, moving the recording pen in the horizontal direction, moving the writing surface in the vertical direction, and contacting and non-contacting the recording pen with the writing surface, thereby plotting the written contents. The electronic blackboard according to claim 2 or 3, wherein: The storage medium,
5. The electronic blackboard according to claim 2, wherein the written contents of the entry surface are stored in a memory as point information for each color. The CPU unit includes:
The color signal for each square read by the scanner unit, the horizontal position of the scanner unit and the vertical position of the writing surface are detected, and the point information for each color on the square of the writing surface is stored. Storing in the memory for each color of the medium corresponding to the square of the entry surface, converting the point information for each color into line segment information for each memory for each color, and recording the information on the recording medium. The electronic blackboard according to claim 2, 3, 4, or 5. The contents written on the entry surface of the electronic blackboard are read by moving the scanner section in the horizontal direction and the entry surface in the vertical direction, and by this reading operation, the written content on the entry surface is divided into squares and colored for each square. Convert to another signal and transfer to CPU
The CPU unit detects the color-specific signal for each square, the horizontal position of the scanner unit, and the vertical position of the writing surface, and stores point information for each color on the square of the writing surface in a storage medium. Stored in the memory for each color corresponding to the squares of the entry surface, convert the dot information for each color stored in the memory into line segment information, and record it on the recording medium,
3. The electronic blackboard according to claim 2, wherein the written content is reproduced by moving the recording pen corresponding to each color in the horizontal direction and moving the writing surface in the vertical direction based on the line segment information. A writing surface for writing characters / graphics, a scanner unit for scanning and taking in the writing contents of the writing surface, a plotter unit for plotting the writing contents on the writing surface with a recording pen, and a storage medium for storing the writing contents An electronic blackboard comprising: a printing unit that prints out the stored writing contents; and a CPU (Central Processor Unit) unit that performs a data conversion process of converting the stored point information of the writing contents into line segment information. ,
A clearing step (A1) for clearing the starting point information of the entry surface;
It is searched whether or not point information remains in the memory for each color of the storage medium. If there is no point information, the process is terminated. If point information remains, the point information proceeds to the next start point information clear determination step (A3). A search step (A2);
It is determined whether the start point information is cleared. If the start point information is cleared, a new start point is set in the next new start point setting step (A4). If the start point information is not cleared, the previous end point is determined. Starting point information clear determination step (A3), which is processed as a starting point, and proceeds to the peripheral search step (A5);
A new starting point setting step (A4) in which the presence or absence of a point is searched from the end of the memory to newly set a starting point, and the point found first is set as a starting point;
Said peripheral search step (A5) for searching around the start point and determining whether or not the start point exists;
When there is a point around the start point in the peripheral search step (A5), a line segment information storage step (A6) of storing information of the start point and the end point as line segment information with a point next to the first point found first as an end point; ;
A color point information clearing step (A7) for clearing the point information in the color memory corresponding to the start point information;
Then, a point information copy step (A8) in which the end point information is copied to the start point information and the process returns to the point information search step (A2);
A line segment storing step (A9) for copying the start point information to the end point information and storing the information of the start point and the end point as a line segment if there is no point around the start point in the peripheral search step (A5);
A memory-by-color clearing step (A10) for clearing the point information of the memory by color corresponding to the start point information;
Thereafter, a start point information clearing step (A11) for clearing the start point information and returning to the point information searching step (A2);
A method for processing written content on an electronic blackboard, comprising: A determination step (B1) for determining whether or not there is data to be read this time;
If there is no data to be read, an end step (B6) of terminating the recording pen in a non-contact state with the writing surface and terminating;
A read step (B2) for reading data if there is data to be read in the determination step (B1);
A position determining step (B3) of comparing the previous end point position with the current start point position to determine whether the previous end point position is the same as the current start point position;
In this position determination step (B3), if the previous end point and the current start point are different positions, they are discontinuous points. Therefore, after the recording pen is moved out of contact with the writing surface in the non-contact state, the recording pen is moved to the current start point position. Contacting the recording pen with the writing surface (B4);
In the position determination step (B3), if the previous end point and the current start point are the same position, they are continuous points, and the line segment is reproduced by moving the recording pen to the current end point position while keeping the recording pen in contact with the writing surface. A line segment reproduction step (B5) returning to the determination step (B1);
The method according to claim 8, further comprising the steps of: The electronic blackboard according to any one of claims 2 to 7,
An electronic blackboard, wherein a drawing and a document are taken in from the image scanner by adding an image scanner, and point information of the taken-in data is converted into line segment information and displayed. The electronic blackboard according to any one of claims 2 to 7,
An electronic blackboard, which reads an image created by a personal computer and an image taken by a digital camera, converts point information of the read data into line segment information, and displays it.

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