JP6111504B2 - Folded paper counting method and abnormality detection method at that time - Google Patents

Folded paper counting method and abnormality detection method at that time Download PDF

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JP6111504B2
JP6111504B2 JP2013086066A JP2013086066A JP6111504B2 JP 6111504 B2 JP6111504 B2 JP 6111504B2 JP 2013086066 A JP2013086066 A JP 2013086066A JP 2013086066 A JP2013086066 A JP 2013086066A JP 6111504 B2 JP6111504 B2 JP 6111504B2
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松田 和也
和也 松田
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エムエムシステムズ有限会社
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本発明は、カタログ、パンフレット、説明書などの印刷物の折り加工された用紙の計数方法及びその用紙計数時における不揃いなどの異常を検出してさらに高精度の計数を可能とする方法に関するものである。  The present invention relates to a counting method for folded sheets of printed matter such as catalogs, pamphlets, and manuals, and a method that enables more accurate counting by detecting abnormalities such as irregularities when counting the sheets. .

カタログ、パンフレット、説明書などの多数枚の同一種類の印刷物においては、所定の大きさに整理するために折り加工機で折り加工することが行われており、その状態で所定の枚数に整理するために計数することが必要となっている。このような折り加工された用紙の計数方法としては、特許文献1に記載されているように、用紙の背部を、カラーテレビカメラやモノクロテレビカメラで撮像して映像情報を得た後、得られた映像情報を二値化または三値化して計数する方法が提案されているが、計数時の用紙不揃い等の異常を検出して計数精度を上げることが必要となっている。  A large number of printed materials of the same type, such as catalogs, pamphlets, and manuals, are folded by a folding machine in order to arrange them into a predetermined size, and in that state, arrange them into a predetermined number of sheets. Therefore, it is necessary to count. As described in Japanese Patent Application Laid-Open No. 2004-133867, such a folded paper counting method is obtained after the back of the paper is imaged with a color TV camera or a monochrome TV camera to obtain video information. There has been proposed a method of counting the image information by binarizing or binarizing, but it is necessary to increase the counting accuracy by detecting an abnormality such as paper misalignment at the time of counting.

しかし、折り加工された複数の用紙の枚数計数は、カメラに複数の用紙が確実に撮像されることが必要であって、用紙の不揃いや、用紙の変形により確実に撮像がされない用紙が混在する場合には、正確な計数が行えないことが問題となっている。  However, counting the number of folded sheets requires that a plurality of sheets be captured by the camera, and there is a mixture of sheets that cannot be reliably captured due to paper misalignment or deformation of the sheets. In some cases, it is a problem that accurate counting cannot be performed.

特許第5131713号公報  Japanese Patent No. 5131713

本発明は、多数の折り加工された用紙の枚数計数時において、高精度の計数方法を提供するとともに、用紙の不揃いや用紙の変形により確実には撮像がされない用紙の検出を可能とする、多数の折り加工された複数の同一用紙の連続した枚数計数時における用紙の不揃い等を検出してさらに高精度の計数を可能とする方法を提供をすることを目的とするものである。  The present invention provides a high-accuracy counting method when counting the number of folded sheets, and enables detection of sheets that are not reliably imaged due to sheet irregularities or sheet deformation. It is an object of the present invention to provide a method for detecting a paper misalignment or the like at the time of counting the number of consecutive sheets of the same folded paper, thereby enabling more accurate counting.

本発明は、上記目的を達成するものであって、折り加工された複数の用紙を背部が同一平面に並ぶように揃え、揃えた複数の用紙を両側から押さえ板で押さえ、背部の前方斜めより光を照射して背間の凹部に影部、背部に非影部を生じさせ、前記の両側の押さえ板と、前記の揃えた複数の用紙の背部を前方よりテレビカメラで、前記の凹部の影部が、前記テレビカメラから得られる映像信号の水平走査線と直角になるように撮像し、得られた映像信号の背部撮像部の水平走査線1本分の映像信号の強さを、一方端から他方端まで前記のテレビカメラの解像度の数で構成されるデジタル信号の各構成点に対応させて順次記憶させ、記憶された映像信号の水平走査線1本分の構成点を5以上に分割し、左端から2番目の分割された範囲の構成点の映像信号の強さの最小値を求め、求められた最小値以上の左端の分割された範囲の構成点の映像信号の強さの平均値を求め、左端の分割された範囲の中央の構成点位置の値とし、右端から2番目の分割された範囲の構成点の映像信号の強さの最小値を求め、求められた最小値以上の右端の分割された範囲の構成点の映像信号の強さの平均値を求め、右端の分割された範囲の中央の構成点位置の値とし、左端から2番目の分割された範囲から右端から2番目の分割された範囲の映像信号の強さの平均値を求め、それぞれの分割された範囲の中央の構成点位置の値とし、一方端から順に分割範囲の中央の構成点位置の値を次々に結んで、他端まで結び、左端から2番目の分割範囲の中央の構成点位置の値と左端の分割範囲の中央の構成点位置の値を結んだ線分を左端まで延長し、右端から2番目の分割範囲の中央の構成点位置の値と右端の分割範囲の中央の構成点位置の値を結んだ線分を右端まで延長して基準屈曲線を形成し基準屈曲線上の値を構成点に対応する基準値として採用し、一方端から他方端まで前記水平走査線1本分の構成点の映像信号の強さの測定信号を順次それぞれの構成点ごとに、構成点の値と対応する基準値と比較して、初回は初めて基準値より映像信号の強さが強くなり、基準値より映像信号の強さが弱くなった場合に非影部と判定し、次回以降は下部基準値より映像信号の強さが弱くなった状態から、基準値より映像信号の強さが強くなり、基準値より映像信号の強さが弱くなった場合に非影部と判定し、判定された非影部を用紙の背部とし、背部の数を積算して用紙の枚数を計数することを特徴とする折り加工された用紙枚数計数方法であり、折り加工された複数の用紙を背部が同一平面に並ぶように揃え、揃えた複数の用紙を両側から押さえ板で押さえ、背部の前方斜めより光を照射して背間の凹部に影部、背部に非影部を生じさせ、前記の両側の押さえ板と、前記の揃えた複数の用紙の背部を前方よりテレビカメラで、前記の凹部の影部が、前記テレビカメラから得られる映像信号の水平走査線と直角になるように撮像し、得られた映像信号の背部撮像部の水平走査線1本分の映像信号の強さを、一方端から他方端まで前記のテレビカメラの解像度の数で構成されるデジタル信号の各構成点に対応させて順次記憶させ、記憶された映像信号の水平走査線1本分の構成点を5以上に分割し、左端から2番目の分割された範囲の構成点の映像信号の強さの最小値を求め、求められた最小値以上の左端の分割された範囲の構成点の映像信号の強さの平均値を求め、左端の分割された範囲の中央の構成点位置の値とし、右端から2番目の分割された範囲の構成点の映像信号の強さの最小値を求め、求められた最小値以上の右端の分割された範囲の構成点の映像信号の強さの平均値を求め、右端の分割された範囲の中央の構成点位置の値とし、左端から2番目の分割された範囲から右端から2番目の分割された範囲の映像信号の強さの平均値を求め、それぞれの分割された範囲の中央の構成点位置の値とし、一方端から順に分割範囲の中央の構成点位置の値を次々に結んで、他端まで結び、左端から2番目の分割範囲の中央の構成点位置の値と左端の分割範囲の中央の構成点位置の値を結んだ線分を左端まで延長し、右端から2番目の分割範囲の中央の構成点位置の値と右端の分割範囲の中央の構成点位置の値を結んだ線分を右端まで延長して基準屈曲線を形成し基準屈曲線上の値を構成点に対応する基準値として採用し、一方端から他方端まで前記水平走査線1本分の構成点の映像信号の強さの測定信号を順次それぞれの構成点ごとに、構成点の値と対応する基準値と比較して、初回は初めて基準値より映像信号の強さが強くなり、基準値より映像信号の強さが弱くなった場合に非影部と判定し、次回以降は下部基準値より映像信号の強さが弱くなった状態から、基準値より映像信号の強さが強くなり、基準値より映像信号の強さが弱くなった場合に非影部と判定し、判定された非影部を用紙の背部とし、背部の数を積算して用紙の枚数を計数するとともに、それぞれの非影部と判定した基準値より強くなった構成点位置の1ヶ前の構成点から、基準値より弱くなった構成点位置の間の映像信号の強さの最大値から、基準値より高くなった構成点位置の1ヶ前の構成点の映像信号の強さと、基準値より弱くなった構成点の映像信号の強さの平均値を減算し、それぞれの用紙の映像信号の基準の強さとして算出し、一方端から他端までそれぞれの正常な状態の用紙の映像信号の基準の強さと比較することにより、計数時の異常を検出することを特徴とする折り加工された用紙計数時の異常検出方法である。  The present invention achieves the above-described object, and aligns a plurality of folded sheets so that the back portion is aligned in the same plane, and presses the aligned plurality of sheets with a pressing plate from both sides, obliquely in front of the back portion. Irradiate light to create shadows in the recesses between the backs and non-shadows in the backs, and press the holding plates on both sides and the backs of the aligned sheets with a TV camera from the front, The shadow part is imaged so as to be perpendicular to the horizontal scanning line of the video signal obtained from the television camera, and the strength of the video signal for one horizontal scanning line of the back imaging part of the obtained video signal is From one end to the other end, the digital signal composed of the number of resolutions of the TV camera is sequentially stored in correspondence with each constituent point, and the constituent point for one horizontal scanning line of the stored video signal is increased to 5 or more. Divide the component points of the second divided range from the left Find the minimum value of the image signal strength, find the average value of the video signal strength of the leftmost divided range that is equal to or greater than the calculated minimum value, and find the central point of the leftmost divided range The minimum value of the video signal strength of the constituent points in the second divided range from the right end is determined as the position value, and the video signal strength of the constituent points in the rightmost split range that is equal to or greater than the determined minimum value. The average value of the heights is taken as the value of the center point of the divided range at the right end, and the average of the intensity of the video signal in the second divided range from the left end to the second divided range from the left end The value is obtained and set as the value of the central component point position of each divided range, and the value of the central component point position of the divided range is sequentially connected from one end to the other end, and the second from the left end. The value of the central point position of the division range and the value of the central point position of the leftmost division range Extend the connected line segment to the left end, and extend the line segment connecting the value of the central component point position of the second division range from the right end to the central component point value of the right end division range to the right end. A bend line is formed, and the value on the reference bend line is adopted as a reference value corresponding to the constituent point, and the measurement signal of the strength of the video signal at the constituent point for one horizontal scanning line from one end to the other end is sequentially provided. For each component point, compared to the component point value and the corresponding reference value, the first time the video signal strength is stronger than the reference value for the first time, and the video signal strength is weaker than the reference value. When the video signal strength is weaker than the reference value and the video signal strength is weaker than the reference value from the state where the video signal strength is weaker than the lower reference value and the video signal strength is weaker than the reference value. Is determined as a non-shadow part, and the determined non-shadow part is defined as the back of the paper, and the number of back parts is added up. A method for counting the number of folded sheets, wherein the number of folded sheets is aligned so that the back is aligned on the same plane, and the aligned sheets are pressed from both sides. Press with a plate, irradiate light from the front of the back diagonally to create a shadow part in the recess between the backs and a non-shadow part in the back part, and forward the holding plate on both sides and the back part of the plurality of aligned sheets forward Further, with the television camera, the shadow portion of the concave portion is imaged so as to be perpendicular to the horizontal scanning line of the video signal obtained from the television camera, and one horizontal scanning line of the back imaging portion of the obtained video signal is obtained. Are sequentially stored in correspondence with each constituent point of the digital signal composed of the number of resolutions of the TV camera from one end to the other end, and the horizontal scanning line 1 of the stored video signal is stored. Divide the constituent points of this into 5 or more. Obtain the minimum value of the video signal strength of the constituent points of the second divided range, determine the average value of the video signal strength of the constituent points of the leftmost divided range that is equal to or greater than the determined minimum value, The minimum value of the video signal strength of the component point of the second divided range from the right end is obtained as the value of the central component point position of the leftmost divided range, and the right end division equal to or greater than the obtained minimum value is obtained. The average value of the video signal strength of the component points in the divided range is obtained and used as the value of the central component point position of the divided range at the right end, and the second division from the right end from the second divided range from the left end The average value of the intensity of the video signal in the divided range is obtained and used as the value of the central point position of each divided range, and the value of the central point position of the divided range is sequentially connected from one end to the other. , Connect to the other end, and the value of the component point position in the center of the second division range from the left end The line segment connecting the value of the central component point of the division range is extended to the left end, the value of the central component point of the second division range from the right end and the value of the central point position of the right division range The line connecting the lines is extended to the right end to form a reference bend line, and the value on the reference bend line is adopted as a reference value corresponding to the constituent point, and the constituent point for one horizontal scanning line from one end to the other end The video signal strength measurement signal is compared with the reference value corresponding to the value of the constituent point sequentially for each constituent point, and for the first time, the strength of the video signal is stronger than the reference value for the first time. When the video signal strength becomes weaker, it is judged as a non-shadow part, and from the next time the video signal strength becomes weaker than the lower reference value, the video signal strength becomes stronger than the reference value, When the video signal strength is weaker than the value, it is determined as a non-shadow part, and the determined non-shadow part Is the back of the paper, counts the number of sheets by adding up the number of backs, and from the reference point that is one point before the reference point determined to be the non-shadow part, From the maximum value of the video signal strength between the weakened component point positions, the video signal strength of the component point immediately before the component point position higher than the reference value and the component point weaker than the reference value Subtract the average value of the video signal strength of each image, and calculate it as the standard strength of the video signal of each paper, and compare it with the standard strength of the video signal of each normal paper from one end to the other Thus, an abnormality detection method at the time of counting folded paper is characterized by detecting an abnormality at the time of counting.

本発明の折り加工された用紙の計数方法及びその際の異常検出方法によれば、多値化したデータにより個々の用紙の情報から多数の折り加工された同一用紙の連続計数時における高精度計数及びその計数時における異常を検出してさらに高精度の計数が可能である。  According to the folding paper counting method and the abnormality detection method at that time according to the present invention, high-precision counting at the time of continuous counting of a large number of the same folded paper from the information of each paper by multi-valued data. In addition, it is possible to count with higher accuracy by detecting an abnormality during the counting.

折り加工された用紙の一例を示す平面図である。  It is a top view which shows an example of the folded paper. 折り加工された複数の用紙1の枚数を計数する手段を示す説明図である。  It is explanatory drawing which shows the means to count the number of sheets of the several folded paper 1. FIG. 正常に揃え置かれた状態の用紙を撮像して得た実際のデータを用いてX軸に水平走査線構成点をとり、Y軸に輝度信号の強さ(色の強さ)をとって表示したグラフである。  Using the actual data obtained by imaging the papers that are properly aligned, the horizontal scanning line composing point is taken on the X axis, and the intensity (color intensity) of the luminance signal is taken on the Y axis. It is a graph. 正常に揃え置かれた状態の用紙を撮像して得た模式的なデータを8分割した各部分の平均値を○で示し、この基準となる点を結んで基準屈曲線を示した模式的なグラフである。  Schematic data obtained by imaging a sheet of paper that has been properly aligned is divided into eight parts, the average value of each part is indicated by ◯, and the reference bending line is shown by connecting the reference points It is a graph. 正常な計数状態の構成点における各色の強さ(輝度信号の強さ)を結んだ線分と基準屈曲線との交差状態とを左端側3枚目までに限定して詳細に示したグラフである。  This is a graph that shows details of the crossing state of the line segment connecting the strength of each color (intensity of the luminance signal) at the constituent points in the normal counting state and the reference bending line up to the third sheet on the left end side. is there. 計数対象の複数の用紙が正常に揃え置かれた状態の模式図である。  It is a schematic diagram of a state in which a plurality of sheets to be counted are normally arranged. 計数対象の複数の用紙の一枚が浮き上がった状態で揃え置かれた異常状態の模式図である。  FIG. 6 is a schematic diagram of an abnormal state in which one of a plurality of sheets to be counted is aligned in a floating state. 用紙1枚が浮き上がった状態で揃え置かれた異常状態の用紙を撮像して得たデータを8分割した各部分の平均値を○で示し、この基準となる点を結んで基準屈曲線を示した模式的なグラフである。  The average value of each part obtained by imaging the data obtained by imaging the abnormal paper that is aligned with one sheet raised is indicated by ○, and the reference bending line is shown by connecting the reference points. This is a schematic graph. 異常が発生した計数状態の構成点における各色の強さ(輝度信号の強さ)を結んだ線分と基準屈曲線との交差状態を左端側3枚目までに限定して詳細に示したグラフである。  A graph showing in detail the intersection between the line segment connecting the strength of each color (the intensity of the luminance signal) and the reference bending line at the constituent points of the counting state where an abnormality has occurred, limited to the third sheet on the left end side. It is.

以下、図面に基づいて本発明の実施態様を詳細に説明する。
図1は所望の大きさに折り加工された用紙の一例であって、1は二つ折りされた用紙、2は二つ折りされた用紙1の背部であり、背部2は図のように半円形状になる。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an example of a sheet folded into a desired size. 1 is a folded sheet, 2 is a back part of the folded sheet 1, and the back part 2 is semicircular as shown in the figure. become.

図2は、折り加工された複数の用紙1の枚数を計数する手段を示すものであって、折り加工された複数の用紙1を背部2が同一平面に並ぶように揃え、両側から押さえ板3で押さえ、背部2の前方の斜め方向から照明装置4で光を照射して背部の凸部に非影部(輝部)5を、背間の凹部に影部6を生じさせる。照明装置4は、右方又は左方のいずれか一方に配置してあれば良いが、右方と左方の両斜め方向に配置して、両斜め方向から照射すると、均一な照明が可能である。揃えた複数の用紙1の背部2と両側の押さえ板3とを、その前方に固定配置したテレビカメラ7で、すべての影部6が撮像されるように影部6とテレビカメラ信号の水平走査線と直角となるように撮像する。テレビカメラ7の位置は左右が均一に撮像することができるように複数の用紙1の中央であることが望ましい。得られた画像は画像モニター8で画像の状態を確認し、良好な画像を得るようにする。  FIG. 2 shows a means for counting the number of folded sheets 1. The folded sheets 1 are aligned so that the back portions 2 are aligned on the same plane, and the pressing plates 3 are arranged from both sides. Then, the illumination device 4 irradiates light from an oblique direction in front of the back part 2 to generate a non-shadow part (bright part) 5 on the convex part of the back part and a shadow part 6 in the concave part between the back parts. The illuminating device 4 may be arranged on either the right side or the left side, but if it is arranged in both the right and left diagonal directions and irradiated from both diagonal directions, uniform illumination is possible. is there. Horizontal scanning of the shadow portion 6 and the TV camera signal is performed so that all the shadow portions 6 are imaged by the television camera 7 in which the back portion 2 and the holding plates 3 on both sides of the aligned sheets 1 are fixedly arranged in front of the same. Take an image so that it is perpendicular to the line. The position of the television camera 7 is preferably at the center of the plurality of sheets 1 so that left and right can be imaged uniformly. The obtained image is checked on the image monitor 8 to obtain a good image.

次に、テレビカメラ7がアナログ方式のカラーテレビカメラの場合には、カラーテレビカメラから得られたアナログカラー画像信号をカラーアナログ−デジタル変換回路9によって、赤、緑、青の色の強さを多値化したデジタル信号に変換し、コンピュータ10に送り、多値化したデジタル化信号のそれぞれの色の強さを、水平走査線を構成する各構成点に対応する多値化した色信号に変換する。カメラがデジタル方式の場合にはデジタル信号を直接コンピュータ10に送り、演算に使用してもよい。また得られたデジタル信号の三色すべてを計数に使用することもできるし、用紙の色に応じてもっとも強く現れる最適の色信号を選び、代表する信号とすることもできる。特に、用紙の色が紺色・青色系統の場合には、青色信号だけが鮮明にあらわれ、赤・緑色の色の強さは不鮮明になるので、誤計数を防止するために計数に使用しない方がよい場合が多い。紺色・青色系統の用紙色の場合には、モノクロカメラを使用すると、計数が難しくなるので、これらの色の用紙の計数には、カラーテレビカメラを使用することが望ましい。  Next, when the TV camera 7 is an analog color TV camera, an analog color image signal obtained from the color TV camera is converted into red, green, and blue color intensity by a color analog-digital conversion circuit 9. Converted into a multi-valued digital signal, sent to the computer 10, and the intensity of each color of the multi-valued digitized signal is converted into a multi-valued color signal corresponding to each constituent point constituting the horizontal scanning line. Convert. When the camera is a digital system, a digital signal may be sent directly to the computer 10 and used for calculation. In addition, all three colors of the obtained digital signal can be used for counting, or an optimum color signal that appears most strongly according to the color of the paper can be selected and used as a representative signal. In particular, when the paper color is amber / blue, only the blue signal appears clearly, and the intensity of the red / green color becomes unclear, so it is better not to use it for counting to prevent erroneous counting. Often good. In the case of dark blue / blue paper colors, it is difficult to count using a monochrome camera. Therefore, it is desirable to use a color television camera for counting papers of these colors.

テレビカメラ7がモノクロテレビカメラの場合には、得られた画像信号をカラーアナログ−デジタル変換回路9をモノクロアナログ−デジタル回路に変更し、前記モノクロアナログ−デジタル回路に送り、アナログ輝度信号を多値化した輝度信号に変換し、図2のコンピュータ10に送り、画像信号の輝度を水平走査線を構成する各構成点に対する多値化した信号に変換する。この場合にも、デジタル方式のモノクロテレビカメラも使用可能である。以下の説明では、カラーテレビカメラについて、説明するが、モノクロテレビカメラも同様に適用される。
また、テレビカメラからの映像信号はカラーの場合と、モノクロの場合があり、カラー信号の場合は輝度信号と色信号、モノクロ信号の場合は輝度信号により画像を構成し、テレビカメラから画像表示装置などへの信号は、RGB信号、コンポジット信号、コンポーネント信号、ハイビジョン信号などが存在し、それぞれの信号をアナログ信号で伝送する場合や、デジタル信号で伝送する場合など多数の方式が存在する、そのため、代表的なアナログ信号を出力するアナログ方式のカラーテレビカメラと、アナログ方式のモノクロテレビカメラの場合で説明を行うが、デジタル信号で伝送する方式のテレビカメラの場合は多値化された信号であるのでアナログ−デジタル変換回路が不要なだけであり、カラーテレビカメラの色信号、モノクロテレビカメラの輝度信号はそれぞれ同一の映像信号として処理可能であり、また色の強さと輝度の強さも画像明るさを表す映像信号の強さとして同一のものとして処理可能である。
When the TV camera 7 is a monochrome TV camera, the obtained image signal is changed from the color analog-digital conversion circuit 9 to a monochrome analog-digital circuit and sent to the monochrome analog-digital circuit, and the analog luminance signal is multi-valued. 2 is sent to the computer 10 in FIG. 2, and the brightness of the image signal is converted into a multi-valued signal for each constituent point constituting the horizontal scanning line. In this case, a digital monochrome television camera can also be used. In the following description, a color television camera will be described, but a monochrome television camera can be similarly applied.
The video signal from the TV camera may be color or monochrome. In the case of a color signal, an image is composed of a luminance signal and a color signal, and in the case of a monochrome signal, the image is displayed from the TV camera. There are RGB signals, composite signals, component signals, hi-vision signals, etc., and there are many methods such as when transmitting each signal as an analog signal or when transmitting as a digital signal. In the case of an analog color TV camera that outputs a typical analog signal and an analog monochrome TV camera, the description will be made, but in the case of a TV camera that transmits a digital signal, it is a multi-valued signal. Therefore, an analog-digital conversion circuit is not required, and color TV camera color signals, monochrome Luminance signal Rebikamera is processable as a same video signal, respectively, also be treated as identical as the strength of the video signal representing the strength even image brightness of color intensity and brightness.

変換された赤・緑・青の色の強さ(輝度信号の強さ)の値を、一方端から他方端まで、前記のアナログカラーテレビカメラの解像度の数の構成されるデジタル信号の各構成点に対応させて順次記憶させ、揃えた複数の用紙1の計数にさいしては、一方の押さえ板3から複数の用紙1を経て他方の押さえ板3に至るまでの水平走査線を構成する各構成点の信号の強さを、影部6と直交する方向に水平走査線1本分検出し、コンピュータモニター11で、図3に示すよにX軸に水平走査線構成点をとり、Y軸に輝度信号の強さをとって表示し、水平走査線構成点の各点に対する信号の強さを示す点を直線で結ぶグラフを表示する。このグラフでは、非影部(輝部)5と影部6が山部と谷部を形成して振幅するように現れ、非影部(輝部)5と影部6をその信号の強さの差として知ることができる。  Each component of the digital signal composed of the converted red, green, and blue color intensity (luminance signal intensity) values from one end to the other end of the number of resolutions of the analog color TV camera. In order to count the plurality of sheets 1 that are sequentially stored in correspondence with the points, the horizontal scanning lines from one pressing plate 3 through the plurality of sheets 1 to the other pressing plate 3 are configured. The signal strength of the composition point is detected for one horizontal scanning line in the direction orthogonal to the shadow portion 6, and the computer monitor 11 takes the horizontal scanning line composition point on the X axis as shown in FIG. Is displayed taking the intensity of the luminance signal, and a graph connecting the points indicating the intensity of the signal with respect to each of the horizontal scanning line constituting points by a straight line is displayed. In this graph, the non-shadow part (bright part) 5 and the shadow part 6 appear to form a peak and a valley, and appear to swing, and the non-shadow part (bright part) 5 and the shadow part 6 are shown as signal strength. You can know as the difference.

図3は、正常に揃え置かれた状態の用紙50枚の計数時の実際のグラフであって、縦軸に色の強さ(輝度信号の強さ)、横軸に水平走査線構成点をとっている。この図では、複雑で微細な屈曲線が表示されるので、ここでは、簡易な説明のために正常に揃え置かれた用紙25枚計数時の模式化したグラフである図4を用いて説明することとする。  FIG. 3 is an actual graph at the time of counting 50 sheets that are normally aligned. The vertical axis indicates the color intensity (intensity of the luminance signal), and the horizontal axis indicates the horizontal scanning line constituent points. I'm taking it. In this figure, since complicated and fine bending lines are displayed, here, for the sake of simple explanation, description will be made with reference to FIG. 4 which is a schematic graph when counting 25 sheets normally arranged. I will do it.

図4は、得られたデータを水平走査線に沿って5以上に分割(図では8分割)した場合の例示であって、赤、緑、青ごとに左端から2番目及び右端から2番目の分割された範囲の構成点の色の強さ(輝度信号の強さ)の最小値を演算し、左端の分割された範囲では演算された左端から2番目の最小値より高い構成点の色の強さの平均値を演算し、右端の分割された範囲では演算された右端から2番目の最小値より高い構成点の色の強さの平均値を演算し、左端および右端以外の分割された範囲では、それぞれの範囲内のすべての構成点の色の強さの平均値を演算し、それぞれの分割された範囲で、範囲内の構成点の色の強さの平均値を分割範囲の中央の構成点位置の値として○で示す。  FIG. 4 shows an example in which the obtained data is divided into five or more (eight divisions in the figure) along the horizontal scanning line, and is the second from the left end and the second from the right end for each of red, green, and blue. The minimum value of the color strength (luminance signal strength) of the component points in the divided range is calculated. In the divided range at the left end, the color of the component point that is higher than the second minimum value from the calculated left end is calculated. The average value of the intensity is calculated, and in the divided range at the right end, the average value of the color intensity of the component point higher than the second minimum value calculated from the right end is calculated, and the divided values other than the left end and the right end are calculated. In the range, the average value of the color intensity of all the component points in each range is calculated, and the average value of the color strength of the component points in the range is calculated in the middle of the divided range in each divided range. The value of the component point position is indicated by a circle.

そして、一方端から順に○で示す分割範囲の中央の構成点位置の値を実線で示すように次々に結び、左端部では左端から2番目の○と左端の○を結ぶ線分を点線で示すように左端側に延長し、右端部では右端から2番目の○と右端の○を結ぶ線分を点線で示すように右端部に延長して、基準屈曲線を形成し、この基準屈曲線上の値を構成点に対応する基準値として採用する。  Then, in order from the one end, the values of the component points at the center of the divided range indicated by ○ are connected one after another as shown by the solid line, and the second line from the left end to the left end ○ is shown by the dotted line at the left end Extend to the left end side, and at the right end portion, a line segment connecting the second circle from the right end to the right end circle is extended to the right end portion as shown by a dotted line to form a reference bend line. The value is adopted as a reference value corresponding to the constituent point.

図5は、水平走査線一本分の構成点の色の強さ(輝度信号の強さ)を左端から用紙3枚分のp1からp34までについて分かりやすく限定して表し、各構成点の色の強さを直線で結び、そして上記のようにして得た基準屈曲線A−Aを表した図であって、これによって、非影部の判定方法を以下に説明する。  FIG. 5 shows the color strength (intensity of the luminance signal) of the constituent points for one horizontal scanning line in an easy-to-understand manner from the left end to p1 to p34 for three sheets of paper, and the color of each constituent point. Is a diagram showing the reference bend line AA obtained as described above, and a method for determining a non-shadow part will be described below.

この非影部の判定方法は、一方端から他方端まで前記水平走査線1本分の構成点の色の強さの測定信号を順次それぞれの構成点ごとに、構成点の値と対応する基準屈曲線の値と比較して、初回は初めて基準屈曲線の値より色が強くなった後、基準屈曲線の値より色が弱くなった場合に非影部と判定し、次回以降は基準屈曲線の値より色が弱くなった状態から、基準屈曲線の値より強くなり、再び色が弱くなった場合に非影部と判定するのである。  This non-shadow portion determination method is such that, from one end to the other end, a color intensity measurement signal for one horizontal scanning line is sequentially measured for each constituent point and a reference corresponding to the constituent point value. Compared with the value of the bend line, the first time the color becomes stronger than the value of the reference bend line and then the color becomes weaker than the value of the reference bend line. When the color becomes weaker than the value of the line and becomes stronger than the value of the reference bending line, and the color becomes weak again, it is determined as a non-shadow portion.

更に図5で具体的に述べる。即ち、構成点p4とp5の間で初めて基準屈曲線A−Aを上方向に越え、構成点p10とp11の間で基準屈曲線A−Aをその後初めて下方向に越えることで非影部と判定し、以降は基準屈曲線Aよりp14のように構成点が低い状態から、構成点p14とp15の間のように基準屈曲線A−Aを上方向に越え、構成点p18とp19の間のようにその後初めて基準屈曲線A−Aを下方向に越えることで新たな非影部を検出し、構成点を最後の点まで同様の方法で非影部の検出を続け、検出された非影部の個数を積算し、非影部を用紙の背部分として、積算された背部分の個数を用紙の枚数とする。そして、それぞれの検出された非影部の検出条件である基準屈曲線A−Aを上方向に越える1ヶ前の構成点の値と、基準屈曲線A−Aを下方向に越えた構成点の値の平均値を演算するとともに、この2ヶの構成点間の最大値を求め、最大値から平均値を減算した値をその用紙の色の基準の強さ(グラフでの高さに相当)とする。  This will be specifically described with reference to FIG. That is, the reference bend line AA is first crossed upward between the constituent points p4 and p5, and the reference bend line AA is crossed down between the composing points p10 and p11 for the first time. After that, from a state where the constituent point is lower than the reference bending line A as p14, the reference bending line A-A is crossed upward as between the constituent points p14 and p15 and between the constituent points p18 and p19. After that, a new non-shadow part is detected for the first time by crossing the reference bending line A-A for the first time, and the detection of the non-shadow part is continued in the same manner until the last point of the constituent point. The number of shadow portions is integrated, the non-shadow portion is the back portion of the paper, and the integrated number of back portions is the number of paper. Then, the value of the immediately preceding configuration point that exceeds the reference bending line AA, which is the detection condition for each detected non-shadow part, and the configuration point that exceeds the reference bending line AA downward The average value of the two values is calculated, the maximum value between the two component points is calculated, and the value obtained by subtracting the average value from the maximum value is the standard strength of the paper color (equivalent to the height in the graph) ).

具体的には、基準屈曲線A−Aを上方向に越えるp5の1ヶ前の点p4と、その後初めて屈曲線A−Aを下方向に越えるp11の平均値を求め、p4とp11の間の最大値p7から減算して用紙の色の強さを求める。計算式で示すと、p4=96、p7=205、p11=90であるので、左端から1枚目の用紙の高さは、P7−(p4+p11)÷2=112と演算され、2枚目は基準屈曲線A−Aを上方向に越えるp15の1ヶ前の点p14と、その後初めて基準屈曲線A−Aを下方向に越えるp19の平均値を求め、p14とp19の間の最大値p17から減算して用紙の色の強さを求める。計算式で示すと、p14=115、p17=217、p19=114であるので、左端から2枚目の用紙の色の強さは、P17−(p14+p19)÷2=102と演算される。同様の方法で、左端から右端までそれぞれの検出された非影部に対して演算し、非影部の色の強さを求め、それぞれの用紙の色の基準の強さ(グラフの高さ)とする。  Specifically, an average value of the point p4 immediately before p5 that exceeds the reference bending line AA and the first time point p11 that crosses the bending line AA for the first time is obtained, and between p4 and p11 The color strength of the paper is obtained by subtracting from the maximum value p7. In the calculation formula, since p4 = 96, p7 = 205, and p11 = 90, the height of the first sheet from the left end is calculated as P7− (p4 + p11) ÷ 2 = 112. The average value of the point p14 immediately before p15 that exceeds the reference bending line AA and the first point p19 that extends below the reference bending line AA for the first time is obtained, and the maximum value p17 between p14 and p19 is obtained. Subtract from to find the strength of the paper color. In the calculation formula, since p14 = 115, p17 = 217, and p19 = 114, the color strength of the second sheet from the left end is calculated as P17− (p14 + p19) ÷ 2 = 102. In the same way, calculate for each detected non-shadow part from the left edge to the right edge, obtain the color intensity of the non-shadow part, and the standard strength of each paper color (graph height) And

図6は、計数対象の用紙が正常に用紙の背部がすべて撮像されるように整列した場合の模式的例示であり、そして、図7は、左端から2枚目が浮き上がり、正常に用紙の背部がすべて撮像されない場合の模式的例示である。図7のような計数対象の用紙が不正常な場合には、図8の▲1▼部に示すように、グラフが正常な図4の場合と比較すると、色の強さが弱くなることによって、用紙の計数時において用紙整列状態の異常を検出することが可能となるのである。具体的には、計数を開始する前に正常な用紙を完全な状態で整列させ、正常時のそれぞれの用紙の色の強さを記録しておき、多数の同一用紙の実際の折り加工時に生産される用紙の計数時にそれぞれの用紙の色の強さを演算し、記録しておいた用紙の基準の色の強さと比較し、あらかじめ設定した許容値の範囲外の場合に異常と判定することができるのである。さらに図9を用いて詳細に不正常な状態の検出方法を述べる。  FIG. 6 is a schematic illustration of the case where the sheets to be counted are aligned so that the back of the sheet is normally imaged, and FIG. 7 shows the second sheet from the left end. This is a schematic illustration in a case where all are not imaged. When the paper to be counted as shown in FIG. 7 is abnormal, as shown in the section (1) in FIG. 8, the intensity of the color becomes weaker than in the case of FIG. 4 where the graph is normal. Thus, it is possible to detect an abnormality in the sheet alignment state when counting sheets. Specifically, before starting counting, normal sheets are aligned in perfect condition, the color strength of each normal sheet is recorded, and produced at the time of actual folding of many identical sheets. The color strength of each paper is calculated when counting the number of printed paper, and compared with the standard color strength of the paper that has been recorded. Can do it. Further, a method for detecting an abnormal state will be described in detail with reference to FIG.

異常状態が生じた図9の場合を正常な状態の図5と比較すると、図9の左端から2枚目の▲1▼部分の色の強さが弱くなり、用紙の色の基準の強さ(グラフの高さ)が低くなっていることがわかる。▲1▼の部分の用紙の色の強さは、2枚目の用紙の用紙の色の強さが基準曲線A−Aを上方向に越えるp16の1ヶ前の点p15とその後初めて屈曲線A−Aを下方向に越えるp19の平均値を求め、p14とp19の間の最大値p17から減算して用紙の色の強さを求める。計算式で示すと、p14=117、p17=180、p19=115であるので、用紙の色の強さは、p17−(p14+p19)÷2=64と演算される。一方、左端から2枚目の用紙の正常時の色の強さは前記の演算で102であるので、▲1▼の部分の色の強さの対比は、64÷102×100=62.7%となり、許容値を±25%に設定すると、設定の許容範囲は75%から125%となり、本例の場合には許容範囲外となるため異常として検出される。  Compared with the normal state of FIG. 5 in the case of FIG. 9 where the abnormal state has occurred, the strength of the color of the portion {circle around (1)} from the left end of FIG. 9 becomes weak, and the standard strength of the paper color It can be seen that (the height of the graph) is low. The strength of the color of the paper in the portion (1) is the point p15 immediately before p16 where the color strength of the second paper exceeds the reference curve AA and the bending line for the first time after that. The average value of p19 exceeding AA in the downward direction is obtained and subtracted from the maximum value p17 between p14 and p19 to obtain the paper color strength. In terms of the calculation formula, p14 = 117, p17 = 180, and p19 = 115, so the strength of the sheet color is calculated as p17− (p14 + p19) / 2 = 64. On the other hand, since the normal color intensity of the second sheet from the left end is 102 in the above calculation, the contrast of the color intensity in the portion (1) is 64 ÷ 102 × 100 = 62.7. When the allowable value is set to ± 25%, the allowable setting range is 75% to 125%. In this example, the allowable value is outside the allowable range, and is detected as an abnormality.

以上のように、グラフから求めた基準屈曲線を用いてグラフと基準屈曲線とから用紙の枚数を算出することによって、精度の高い枚数の計数が行えるとともに、実際の連続計数時の用紙の色の強さを正常時の用紙の色の強さと比較することによって、用紙整列状態の異常も検出することが可能であり、これにより、適正な整列作業が可能となり、適正な整列作業における計数が安定して行うことができるため、整列状態の不具合による誤計数のない、より高精度の計数を行うことができる。なお、計数枚数が正常な状態の用紙検査時の計数枚数と異なる場合には、比較対象が存在しない場合や枚数が異なることにより、それぞれの用紙の色の強さの検出結果が正常時と異なることが多いため、異常の検査を行わないことが望ましい。  As described above, by calculating the number of sheets from the graph and the reference bend line using the reference bend line obtained from the graph, the number of sheets can be counted with high accuracy, and the color of the sheet at the time of actual continuous counting By comparing the strength of the paper with the strength of the color of the paper in the normal state, it is possible to detect abnormalities in the paper alignment state, thereby enabling proper alignment work and counting in the proper alignment work. Since it can be performed stably, it is possible to perform more accurate counting without erroneous counting due to defects in the alignment state. In addition, when the counted number is different from the counted number at the time of sheet inspection in a normal state, the detection result of the color strength of each sheet is different from the normal state when there is no comparison target or the number of sheets is different. Often it is desirable not to check for abnormalities.

1 二つ折りされた用紙
2 背部
3 押さえ板
4 照明装置
5 非影部
6 影部
7 テレビカメラ
8 画像モニター
9 カラーアナログ−デジタル変換回路
10 コンピュータ
11 コンピュータモニター
DESCRIPTION OF SYMBOLS 1 Folded paper 2 Back part 3 Holding plate 4 Illumination device 5 Non-shadow part 6 Shadow part 7 Television camera 8 Image monitor 9 Color analog-digital conversion circuit 10 Computer 11 Computer monitor

Claims (2)

折り加工された複数の用紙を背部が同一平面に並ぶように揃え、揃えた複数の用紙を両側から押さえ板で押さえ、背部の前方斜めより光を照射して背間の凹部に影部、背部に非影部を生じさせ、前記の両側の押さえ板と、前記の揃えた複数の用紙の背部を前方よりテレビカメラで、前記の凹部の影部が、前記テレビカメラから得られる映像信号の水平走査線と直角になるように撮像し、得られた映像信号の背部撮像部の水平走査線1本分の映像信号の強さを、一方端から他方端まで前記のテレビカメラの解像度の数で構成されるデジタル信号の各構成点に対応させて順次記憶させ、記憶された映像信号の水平走査線1本分の構成点を5以上に分割し、左端から2番目の分割された範囲の構成点の映像信号の強さの最小値を求め、求められた最小値以上の左端の分割された範囲の構成点の映像信号の強さの平均値を求め、左端の分割された範囲の中央の構成点位置の値とし、右端から2番目の分割された範囲の構成点の映像信号の強さの最小値を求め、求められた最小値以上の右端の分割された範囲の構成点の映像信号の強さの平均値を求め、右端の分割された範囲の中央の構成点位置の値とし、左端から2番目の分割された範囲から右端から2番目の分割された範囲の映像信号の強さの平均値を求め、それぞれの分割された範囲の中央の構成点位置の値とし、一方端から順に分割範囲の中央の構成点位置の値を次々に結んで、他端まで結び、左端から2番目の分割範囲の中央の構成点位置の値と左端の分割範囲の中央の構成点位置の値を結んだ線分を左端まで延長し、右端から2番目の分割範囲の中央の構成点位置の値と右端の分割範囲の中央の構成点位置の値を結んだ線分を右端まで延長して基準屈曲線を形成し基準屈曲線上の値を構成点に対応する基準値として採用し、一方端から他方端まで前記水平走査線1本分の構成点の映像信号の強さの測定信号を順次それぞれの構成点ごとに、構成点の値と対応する基準値と比較して、初回は初めて基準値より映像信号の強さが強くなり、基準値より映像信号の強さが弱くなった場合に非影部と判定し、次回以降は下部基準値より映像信号の強さが弱くなった状態から、基準値より映像信号の強さが強くなり、基準値より映像信号の強さが弱くなった場合に非影部と判定し、判定された非影部を用紙の背部とし、背部の数を積算して用紙の枚数を計数することを特徴とする折り加工された用紙枚数計数方法。  Arrange the folded sheets so that the back is aligned on the same plane, press the aligned sheets from both sides with pressing plates, and irradiate light from the front of the back diagonally to the recess between the back and shadow. A non-shadow portion is generated, and the holding plates on both sides and the back portions of the plurality of aligned sheets are viewed from the front with a TV camera, and the shadow portion of the recess is the horizontal of the video signal obtained from the TV camera. The image signal is captured so as to be perpendicular to the scanning line, and the strength of the video signal for one horizontal scanning line of the back imaging unit of the obtained video signal is the number of resolutions of the TV camera from one end to the other end. The configuration of the second divided range from the left end is divided into 5 or more, and the configuration points for one horizontal scanning line of the stored video signal are sequentially stored corresponding to the configuration points of the digital signal to be configured. Find the minimum value of the video signal strength at the point and The average value of the video signal strengths of the component points in the divided range at the left end that is greater than or equal to the value is obtained and used as the value of the central component point in the divided range at the left end, and the second divided range from the right end Find the minimum value of the video signal strength at the composition point, find the average value of the video signal strength at the composition point of the right end divided range that is equal to or greater than the obtained minimum value, and calculate the center of the right end divided range The average value of the intensity of the video signal in the second divided range from the right end is obtained from the second divided range from the left end, and the central constituent point of each divided range is obtained. The value of the position, the value of the central component point of the division range in order from one end, and the other end, the value of the central component point of the second division range from the left end and the division range of the left end Extend the line connecting the values of the central component points to the left end and number 2 from the right end. A line segment connecting the value of the central component point of the divided range and the value of the central component point of the rightmost divided range is extended to the right end to form a reference bend line, and the value on the reference bend line is used as the component point. Adopted as a corresponding reference value, from the one end to the other end, a video signal strength measurement signal for one horizontal scanning line for each of the horizontal scanning lines sequentially for each constituent point, a reference corresponding to the constituent point value When the video signal strength is stronger than the reference value for the first time, and the video signal strength is weaker than the reference value for the first time, it is determined as a non-shadow part. When the video signal strength is stronger than the reference value and the video signal strength is weaker than the reference value from the state where the signal strength is weak, it is determined as a non-shadow part, and the determined non-shadow part Is the back of the paper, and the number of sheets is counted by accumulating the number of backs. A method for counting the number of processed sheets. 折り加工された複数の用紙を背部が同一平面に並ぶように揃え、揃えた複数の用紙を両側から押さえ板で押さえ、背部の前方斜めより光を照射して背間の凹部に影部、背部に非影部を生じさせ、前記の両側の押さえ板と、前記の揃えた複数の用紙の背部を前方よりテレビカメラで、前記の凹部の影部が、前記テレビカメラから得られる映像信号の水平走査線と直角になるように撮像し、得られた映像信号の背部撮像部の水平走査線1本分の映像信号の強さを、一方端から他方端まで前記のテレビカメラの解像度の数で構成されるデジタル信号の各構成点に対応させて順次記憶させ、記憶された映像信号の水平走査線1本分の構成点を5以上に分割し、左端から2番目の分割された範囲の構成点の映像信号の強さの最小値を求め、求められた最小値以上の左端の分割された範囲の構成点の映像信号の強さの平均値を求め、左端の分割された範囲の中央の構成点位置の値とし、右端から2番目の分割された範囲の構成点の映像信号の強さの最小値を求め、求められた最小値以上の右端の分割された範囲の構成点の映像信号の強さの平均値を求め、右端の分割された範囲の中央の構成点位置の値とし、左端から2番目の分割された範囲から右端から2番目の分割された範囲の映像信号の強さの平均値を求め、それぞれの分割された範囲の中央の構成点位置の値とし、一方端から順に分割範囲の中央の構成点位置の値を次々に結んで、他端まで結び、左端から2番目の分割範囲の中央の構成点位置の値と左端の分割範囲の中央の構成点位置の値を結んだ線分を左端まで延長し、右端から2番目の分割範囲の中央の構成点位置の値と右端の分割範囲の中央の構成点位置の値を結んだ線分を右端まで延長して基準屈曲線を形成し基準屈曲線上の値を構成点に対応する基準値として採用し、一方端から他方端まで前記水平走査線1本分の構成点の映像信号の強さの測定信号を順次それぞれの構成点ごとに、構成点の値と対応する基準値と比較して、初回は初めて基準値より映像信号の強さが強くなり、基準値より映像信号の強さが弱くなった場合に非影部と判定し、次回以降は下部基準値より映像信号の強さが弱くなった状態から、基準値より映像信号の強さが強くなり、基準値より映像信号の強さが弱くなった場合に非影部と判定し、判定された非影部を用紙の背部とし、背部の数を積算して用紙の枚数を計数するとともに、それぞれの非影部と判定した基準値より強くなった構成点位置の1ヶ前の構成点から、基準値より弱くなった構成点位置の間の映像信号の強さの最大値から、基準値より高くなった構成点位置の1ヶ前の構成点の映像信号の強さと、基準値より弱くなった構成点の映像信号の強さの平均値を減算し、それぞれの用紙の映像信号の基準の強さとして算出し、一方端から他端までそれぞれの正常な状態の用紙の映像信号の基準の強さと比較することにより、計数時の異常を検出することを特徴とする折り加工された用紙計数時の異常検出方法。  Arrange the folded sheets so that the back is aligned on the same plane, press the aligned sheets from both sides with pressing plates, and irradiate light from the front of the back diagonally to the recess between the back and shadow. A non-shadow portion is generated, and the holding plates on both sides and the back portions of the plurality of aligned sheets are viewed from the front with a TV camera, and the shadow portion of the recess is the horizontal of the video signal obtained from the TV camera. The image signal is captured so as to be perpendicular to the scanning line, and the strength of the video signal for one horizontal scanning line of the back imaging unit of the obtained video signal is the number of resolutions of the TV camera from one end to the other end. The configuration of the second divided range from the left end is divided into 5 or more, and the configuration points for one horizontal scanning line of the stored video signal are sequentially stored corresponding to the configuration points of the digital signal to be configured. Find the minimum value of the video signal strength at the point and The average value of the video signal strengths of the component points in the divided range at the left end that is greater than or equal to the value is obtained and used as the value of the central component point in the divided range at the left end, and the second divided range from the right end Find the minimum value of the video signal strength at the composition point, find the average value of the video signal strength at the composition point of the right end divided range that is equal to or greater than the obtained minimum value, and calculate the center of the right end divided range The average value of the intensity of the video signal in the second divided range from the right end is obtained from the second divided range from the left end, and the central constituent point of each divided range is obtained. The value of the position, the value of the central component point of the division range in order from one end, and the other end, the value of the central component point of the second division range from the left end and the division range of the left end Extend the line connecting the values of the central component points to the left end and number 2 from the right end. A line segment connecting the value of the central component point of the divided range and the value of the central component point of the rightmost divided range is extended to the right end to form a reference bend line, and the value on the reference bend line is used as the component point. Adopted as a corresponding reference value, from the one end to the other end, a video signal strength measurement signal for one horizontal scanning line for each of the horizontal scanning lines sequentially for each constituent point, a reference corresponding to the constituent point value When the video signal strength is stronger than the reference value for the first time, and the video signal strength is weaker than the reference value for the first time, it is determined as a non-shadow part. When the video signal strength is stronger than the reference value and the video signal strength is weaker than the reference value from the state where the signal strength is weak, it is determined as a non-shadow part, and the determined non-shadow part Is the back of the paper, and the number of paper is counted by accumulating the number of backs. It is higher than the reference value from the maximum value of the strength of the video signal between the constituent point immediately before the constituent point position that became stronger than the reference value determined to be a non-shadow part and the constituent point position that became weaker than the reference value. Subtract the average value of the video signal strength of the component point immediately before the component point and the average value of the video signal strength of the component point weaker than the reference value. When counting folded paper, characterized by detecting abnormalities at the time of counting by comparing with the reference strength of the video signal of each normal state paper from one end to the other end Anomaly detection method.
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