JP2013097775A - Highly accurate counting method for folded sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a counting method for, when the misalignment of sheets is detected or any non-uniform sheet or the like is included in the case of counting a plurality of sheets, preventing miscount by indicating that the sheets are in an irregular state, and for indicating that the sheets are in a satisfactory counting state.SOLUTION: A plurality of folded sheets 1 are arranged, and irradiated with the rays of light so that a bright part 5 can be generated in a back part 2, and that a shadow part 6 can be generated in a concave part between the backs. The sheets 1 are imaged by a television camera 7, and an obtained image signal is converted into a signal of the intensity of a color multi-valued with respect to each color by an analog/digital conversion circuit 9. A signal of the intensity of the color of each of configuring points configuring one horizontal scanning line 1, the intensity of the color of each of the configuring points being compared with that of a bent line as a calculated reference, and determined to be higher, is compared with preceding and succeeding signals by several numbers for the one horizontal scanning line, it is determined that the pickup image is the shadow part when the intensity of each of the colors of the configuring points is higher than the intensity of all the preceding and succeeding colors to be compared, the determined bright parts are integrated as the number of sheets, and the number of sheets is counted.

Description

  The present invention relates to a counting method for the number of folded sheets, and more particularly to a high-precision counting method for the number of folded sheets of printed matter such as catalogs, pamphlets, and instructions.

  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 a method of counting such folded paper, as described in Patent Documents 1 and 2, the back of the paper is captured with a color TV camera or a monochrome TV camera to obtain video information, or brightness. A method has been proposed in which luminance information is obtained using a meter or the like, and then the obtained video information and luminance information are binarized or binarized and counted.

  However, when the identity of a plurality of folded sheets is high, the color intensity and brightness tend to be almost the same for each sheet, so when binarizing or binarizing, The paper reference value can be set easily, but in reality there are often subtle changes in the state of paper alignment. In this case, subtle noise in the color intensity and brightness information can occur. Often occurs and miscounts occur. In this way, subtle fluctuations in the state in which the sheets are laid out may cause noise in the obtained video information and luminance information, which may cause erroneous counting, requiring accurate counting. The case has become a problem.

  In addition, when imaging multiple folded sheets, the light from the lighting device is not evenly irradiated due to the irradiation condition of the light and the distance from the light source, and the video information to be counted is not uniform. Nevertheless, since the reference value to be compared is a constant value, errors often occur. In particular, recently, it has become necessary to count a large number of sheets by increasing the distance from the light source. In this case, it is necessary to provide a sheet counting method with more accurate counting conditions. This is insufficient even by Patent Document 3 and Patent Document 4, which are the inventors' inventions.

  Japanese Patent Laid-Open No. 61-272892   JP-A-3-238579   Japanese Patent No. 3765112   Japanese Patent Laid-Open No. 2007-220052

  The present invention performs accurate and stable high-precision counting in counting a plurality of sheets having a slight change in the shape of the back portion of a plurality of folded sheets, and adds accurate and stable counting conditions. An object of the present invention is to provide a counting method for the number of sheets that enables high-precision counting.

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 a shadow part in the recess between the back and a non-shadow part in the back part, and press the plate on both sides and the back part of the plurality of aligned sheets with an analog color TV camera from the front, The shadow portion of the concave portion is imaged so as to be perpendicular to the horizontal scanning line of the color image signal obtained from the analog color television camera, and the horizontal scanning line 1 of the back imaging portion of the obtained analog color image signal. Value obtained by multi-leveling the intensity of red, green, and blue colors of the analog signal for each minimum resolution unit of the analog color TV camera by a color analog-digital conversion circuit from one end to the other end Conversion to The intensity values of the converted red, green, and blue colors are sequentially assigned from one end to the other end corresponding to each constituent point of the digital signal that is composed of the number of resolutions of the analog color TV camera. The stored configuration points for one horizontal scanning line of red, green, and blue are uniformly divided into 8 to 20, and the preset lower limit value is used as the lower limit value. In each divided range for green, green, and blue, the average value of the color intensity of the component points in the range is obtained, and this is used as the value of the central component point of the divided range, and the values at both ends are determined in advance. Adopted as the value of the set lower limit line, connecting the value of the central point of the division range in order from one end to the other, connecting to the other end to form a reference bending line, and the value on that line is the respective configuration Adopted as a reference value corresponding to a point, the horizontal running from one end to the other end Comparing the measurement signal of the color strength of the composition point for one line with the reference value corresponding to the value of the composition point for each composition point sequentially, the composition point whose color is stronger than the reference value is determined, The color strength of the determined component point is compared with the component points whose value is between 25% and 75% of the value obtained by dividing the number of component points for one horizontal scanning line before and after by the scheduled number of sheets. If the color strength of the determined component points is all stronger than the color strength of the component points before and after the comparison, it is determined as a non-shadow portion, the determined non-shadow portion as the back of the paper, and the number of back portions To calculate the number of sheets, and sequentially calculate the number of constituent points between the constituent point determined to be the back of the paper and the constituent point determined to be the back of the paper. The number of composing points between points is calculated by counting the number of composing points between the composing point that was first determined for the paper back and the composing point that was last determined for the paper back. Divide by a value obtained by subtracting 1 from the expected number of sheets to obtain an average value between the average component points, and 25% to 50% of the divided value to the value divided to eliminate the influence of individual differences in paper width When the value of% is compared with the value obtained by adding and subtracting, if all are larger than the subtracted value and smaller than the added value, the count value of the paper is displayed as normal counting is being performed. This is a high-precision counting method for folded paper, characterized by aligning multiple folded papers so that the back is aligned on the same plane, pressing the aligned paper with both sides from the sides, A monochrome TV camera of an analog system from the front by irradiating light obliquely to produce a shadow part in the recess between the backs and a non-shadow part in the back part, and holding the pressing plates on both sides and the backs of the plurality of aligned sheets. And the shadow of the recess is The intensity of the luminance of the analog signal for one horizontal scanning line of the back imaging unit of the obtained analog monochrome image signal is imaged so as to be perpendicular to the horizontal scanning line of the monochrome image signal obtained from the noro television camera. A monochrome analog-to-digital conversion circuit from one end to the other end converts the value into a multivalued value for each minimum resolution unit of the analog monochrome television camera, and converts the converted luminance intensity value from one end. The other end is sequentially stored in correspondence with each constituent point of the digital signal having the number of resolutions of the analog monochrome television camera, and the stored constituent points for one horizontal scanning line are uniformly 8 to 20 Divide and adopt the value of the preset lower limit line as the lower limit value, and in each divided range, find the average value of the intensity of the luminance of the component points within the range, and divide this The value of the central point of the range is used as the value of the center point of the range, and the values at both ends are adopted as the values of the preset lower limit line. Connected to form a reference bending line, and the value on the line is adopted as a reference value corresponding to each constituent point, and the intensity of luminance at one constituent point of the horizontal scanning line is measured from one end to the other end. The signal is sequentially compared with the reference value corresponding to the value of the constituent point for each constituent point to determine a constituent point having a higher luminance than the reference value, and the intensity of the luminance of the determined constituent point is Compared to the number of component points of 25% to 75% of the value obtained by dividing the number of component points for one horizontal scanning line by the scheduled number of sheets, the intensity of the determined component points is compared. If all of the brightness points of the constituent points before and after are determined to be non-shadow areas, the non-shadow areas determined The number of sheets is counted by adding the number of backs and counting the number of sheets, and the number of component points between the component point determined to be the sheet back and the component point determined next to the sheet back is Calculate the number of component points between the respective component points calculated sequentially, and count the number of component points between the component point first determined for the paper back and the component point finally determined for the paper back Divide by the value obtained by subtracting one more to obtain the average value between the average component points, and the value divided by 25% to 50% of the divided value to eliminate the influence of individual differences in paper width Compared with the value obtained by adding and subtracting, if all are larger than the subtracted value and smaller than the added value, the count value of the paper is displayed as normal counting being performed. This is a high-precision counting method for folded paper.

  According to the method for counting the number of sheets of folded paper according to the present invention, it is possible to count a large number of sheets while grasping the counting state, thereby preventing erroneous counting and performing stable and highly accurate counting. Is possible.

  It is a top view which shows an example of the folded paper.   It is explanatory drawing which shows the means to count the number of sheets of the several folded paper 1. FIG.   It is the graph which took the horizontal scanning line composition point on the X-axis, and took the strength of the signal on the Y-axis.   This is a graph showing horizontal scanning line composing points on the X-axis and signal strength on the Y-axis, and shows a state in which noise after moving average is removed.   (A) is a plan view showing an example of a plurality of folded sheets 1, and (B) is from the start end to the end of one horizontal scanning line obtained by imaging the sheet (A). It is the graph which displayed the strength of the signal so as to correspond to the position of (A).   It is a graph when the irradiation distance becomes long and the intensity of the signal decreases from the center toward both ends.   In FIG. 6, it is the graph which showed the average value of each part divided into 8 by (circle).   FIG. 8 is a graph showing a reference bending line, a width between sheets, and a preset lower limit value in FIG. 7.   It is a graph in the case where disorder occurs in the state where the sheets are aligned and shows a state in which the graph changes.

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.

  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.

  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 by the color analog-to-digital conversion circuit 9 to the intensity of red, green, and blue colors. 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. All three colors of the obtained digital signal can be used for counting, or the 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.

  When the TV camera 7 is a monochrome TV camera, the obtained image signal is changed from the color analog-to-digital conversion circuit 9 to a monochrome analog-to-digital circuit and sent to the monochrome analog-to-digital circuit, and the analog luminance signal is multivalued. 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.

  The converted red, green, and blue color intensity values are sequentially stored from one end to the other end in correspondence with each constituent point of the digital signal that is composed of the number of resolutions of the analog color TV camera. In addition, when counting the plurality of aligned sheets 1, the signal strength of each constituent point constituting the horizontal scanning line from one pressing plate 3 to the other pressing plate 3 through the plurality of sheets 1 is determined. Is detected for one horizontal scanning line in a direction orthogonal to the shadow portion 6, and the computer monitor 11 takes the horizontal scanning line composing point on the X axis and the signal strength on the Y axis as shown in FIG. And a graph connecting the points indicating the signal strength for each of the horizontal scanning line constituent points with a straight line. In this graph, the bright part 5 and the shadow part 6 form peaks and valleys and appear to swing, and the bright part 5 and the shadow part 6 can be known as the difference in signal strength.

  FIG. 4 is a graph showing details of connecting the color intensity of each component point of the digital signal with a straight line. In addition, when noise is included, it is desirable to process by a moving average method.

  FIG. 5B shows the horizontal scanning line composing point on the horizontal axis and the starting end to the end of one horizontal scanning line on the vertical axis, as disclosed by the present inventor in Japanese Patent Application Laid-Open No. 2007-220052. The positions of the respective points from S0 to S119 indicate the signal strengths corresponding to the start end X0 to the end end X119 of the constituent points of the horizontal scanning line. . The condition for the arbitrary point Sn to be the peak of the mountain is higher than the reference line XY, and the point Sn is compared with each of the set number of comparison points before and after the point Sn. It is necessary to be high.

If the number of the comparison points (comparison number) is four before and after, the conditional expression for the point Sn to be the peak of the mountain is as follows.
Sn> Sn-1, Sn> Sn-2, Sn> Sn-3, Sn> Sn-4,
Sn ≧ S + 1, Sn ≧ Sn + 2, Sn ≧ Sn + 3, Sn ≧ Sn + 4
Strictly speaking, for the processing when there is the same value, the front part is calculated with an inequality sign, and the rear part is calculated with an inequality sign and an equal sign. If all of the above conditional expressions are satisfied, the point Sn is determined to be the peak of the mountain, and if not satisfied, it is not determined to be the peak of the mountain.

  Therefore, the values of all the constituent points from the start end to the end end of the horizontal scanning line are sequentially substituted into Sn, and it is determined by calculating whether the peak is a peak. Note that there may be a case where there is no component point to be compared at the end portion. In this case, it is excluded from the determination, and in this example, S5, S6,... Sequentially from S4 in FIG. Substitute up to S119 into Sn and compare to determine whether it is a peak of a mountain.

For example, S1 to S15 are lower than the reference line and excluded, and in the case of S17 above the reference line, S17 and S16, S17 and S15, S17 and S14, S17 and S13, S17 and S18, S17 and S19, S17 And S20, and S17 and S21 are not higher than all the points S17 compares, S17 is not determined to be the peak of the mountain. On the other hand, in the case of S21 above the reference line, it is higher than all of S17, S18, S19, S20 and S22, S23, S24, and S25 to be compared, so S21 is the peak of the mountain. Determined.

  It is desirable to set the optimum number for determining the peak of the above-mentioned peak according to the paper quality, folding form, and printing state, but the ratio obtained by dividing the number of horizontal scanning lines by the scheduled number of sheets is The number is set within a setting range of 25% to 75%. In the example of FIG. 5B, since the number of constituent points of the horizontal scanning line is 200 and the scheduled number of counts is 12, the minimum comparison number within the setting range is 200 ÷ 12 × 25 (%) ÷. 100 is 4 pieces.

  The determination of the peak of the peak when the number of comparisons is four is as described above. Regardless of the reference line, when Sn is S0, or when Sn is S1 to S3, before the Sn Since there are no four comparison signals, in this case, the signal is not subject to determination. When the reference line is 0, the actual determination is from S4 to the 195th signal five times before the end of the horizontal scanning line.

Based on the above calculation formula, the comparison number before and after is 4, and the signal strength of each constituent point in FIG. 5B is from S4 to the 195th point in the direction of the end edge (up to S119 in this example). If it determines, S21, S36, S50, S66, S87, and S104 will be determined as a peak of a mountain.
The determination method is expressed by an arithmetic expression as follows: Sn> Sn-1, Sn> Sn-2, Sn> Sn-3, Sn> Sn-4,
Sn ≧ S + 1, Sn ≧ Sn + 2, Sn ≧ Sn + 3, Sn ≧ Sn + 4,
Sn> reference line, that is, in this example, the number of sheets is accurately counted as 6.

However, by adopting 3 which is smaller than the minimum value of the setting range as the number of comparisons, based on the following calculation formula, the constituent points in FIG. When calculation is performed in the end direction (up to S119 in FIG. 5B in this example), S21, S36, S50, S66, S71, S82, S87, S97, and S104 are determined as the peak of the mountain, and the peak of the mountain Nine, and an erroneous count of 9 occurs within the calculation range.
Sn> Sn-1, Sn> Sn-2, Sn> Sn-3,
Sn ≧ S + 1, Sn ≧ Sn + 2, Sn ≧ Sn + 3,
Sn> reference line

In the example of FIG. 5B, since the number of constituent points of the horizontal scanning line is 200 and the scheduled number of counts is 12, the maximum comparison number within the setting range is 200 ÷ 12 × 75 ÷ 100. There will be twelve. Therefore, assuming that the number of comparisons before and after is 12, and based on the following calculation formula, the constituent point in FIG. 5B is changed from the start end of the horizontal scanning line (S12 in FIG. 5B) to the end end direction (in this example). When calculation is performed up to S119 in FIG. 5B, S21, S36, S50, S66, S87, and S104 are determined as the peaks, and the number of sheets is accurately counted as six within the calculation range.
Sn> Sn-1, Sn> Sn-2, Sn> Sn-3... Sn> Sn-12,
Sn ≧ S + 1, Sn ≧ Sn + 2, Sn ≧ Sn + 3... Sn ≧ Sn + 12,
Sn> reference line

However, the number of comparisons before and after is set to 13 which is larger than the maximum ratio, and based on the following calculation formula, the constituent point in FIG. 5B is set to the start end of the horizontal scanning line (from S12 in FIG. 5B). When the calculation is performed (up to S119 in FIG. 5B in this example), S21, S36, S50, S66, and S87 of the sheets A, B, C, D, and E are determined as the peaks, and the sheet F is It is not determined as the peak of the mountain, but there are five, and an erroneous count of five occurs within the calculation range.
Sn> Sn-1, Sn> Sn-2, Sn> Sn-3... Sn> Sn-13,
Sn ≧ S + 1, Sn ≧ Sn + 2, Sn ≧ Sn + 3... Sn ≧ Sn + 13,
Sn> reference line

In the example of FIG. 5B, since the number of constituent points of the horizontal scanning line is 200 and the number of scheduled counts is 12, the number of comparisons using the average value in the set range (25 to 75%) is 200. ÷ 12 × 50 ÷ 100, which is 8 pieces. The number of comparisons in the front and rear is 8, and based on the following calculation formula, the constituent point in FIG. 5B is set to the start end of the horizontal scanning line (from S8 in FIG. 5B) toward the end end (in this example, FIG. 5). When calculation is performed in (B) (up to S119), S21, S36, S50, S66, S87, and S104 are detected as the peak of the mountain, and the number of sheets is accurately counted as six within the calculation range.
Sn> Sn-1, Sn> Sn-2, Sn> Sn-3... Sn> Sn-8,
Sn ≧ S + 1, Sn ≧ Sn + 2, Sn ≧ Sn + 3... Sn ≧ Sn + 8,
Sn> reference line In the case of this example, the number of comparisons can be properly determined in the range of 4 to 12, but the number of comparisons is desirably 8 for the most stable counting.

  When the number of constituent points of the horizontal scanning line is 200 and the planned number of counted sheets is 20, the optimal comparison number within the standard setting range is 200 ÷ 20 × 50 ÷ 100, which is five. In this case, the comparison number can be accurately counted in the range of 3 to 8.

  FIG. 6 is an ideal graph in which there is no change in the state in which the sheets are aligned. In the overall shape, the color intensity decreases from the center to both ends. In the case of this example, in the case of this example, the counting was performed with reference to the line segment CD in FIG. 8, which was a problem.

  In the present invention, the horizontal scanning line is divided into any of 8 to 20, and the value of the preset lower limit line AB is adopted as the lower limit value, and in each divided range for each of red, green, and blue, The average value of the color strength of the constituent points within the range is obtained. Next, this is used as the value of the central component point of the divided range, and the values at both ends are adopted as the values of the preset lower limit line AB, and the values of the central constituent point positions of the divided range in turn from one end to the next. The reference bending line is formed by connecting to the other end, and the value on the line is adopted as the reference value corresponding to each constituent point. In other words, the lower limit line AB, in which the average value of the color intensity of the divided parts is set in advance, is used as the lower limit value and is calculated as the lower limit value, and a bent line connecting the centers of the divided parts is formed. The values on the bent line are adopted as reference values corresponding to the constituent points. Here, the bent line may be a line connected by a curve.

In the example of FIG. 7, there are 8 divisions, and the average value of the divided portions is shown at the center of each divided portion.
Assuming that the number of component points is 640, the number of component points per division is 80, and the average of the first component points is the lower limit value of the first component point that is lower than the lower limit line AB of S0 to S79. The total after the change is divided by 80. From the right in the figure, the average value from S80 to S159, the average value from S160 to S239, and so on are calculated, and the end portion is calculated in the same manner as the first portion. To do.

  The number of divisions is usually eight. However, if the paper to be counted is wide, such as 10 cm or more, the distance from the light source and the illumination irradiation will not be uniformly distributed over the entire area. When the number of divisions is 20 at maximum, an appropriate reference bending line can be created.

  FIG. 8 shows a bent line A-ab-c-d-e-f-g-B that employs the lower limit value at both ends and connects the average values of the respective divided ranges. Yes.

  In the present invention, from one end to the other end, the color intensity measurement signal for one horizontal scanning line is sequentially compared for each constituent point with the reference value corresponding to the constituent point value. The composition point whose color is stronger than the reference value is determined, and the color strength of the determined composition point is calculated from 25% of the value obtained by dividing the number of composition points for one horizontal scanning line before and after by the scheduled number of sheets. Compared with the number of component points with a value of 75%, if the color strength of the determined component points is all stronger than the color strength of the component points before and after the comparison, it is determined as a non-shadow part and determined The non-shadow portion is set as the back portion of the sheet, and the number of sheets is counted by accumulating the number of the back portions. In the case of FIG. 8, since the paper is normal, proper counting is possible.

  On the other hand, in FIG. 9, the alignment of the sheets to be counted is disordered or there is a sheet that is not uniform, and this part is lower than the part de of the reference bending line in the S part. In this case, one sheet is not counted and one sheet is less than the normal value. In the case of this example, the sheet is counted even in a turbulent state, and in the case of simply performing the counting, the counting is performed in any case. However, when performing accurate counting with high accuracy, it is important to detect misaligned paper, non-uniform paper, etc., and this can only prevent erroneous counting. is there.

  In the conventional method of the present inventor, when the paper at the end and the paper at the center are out of alignment and there is non-uniform paper, the paper is detected because the edge is close to the reference line CD. Cheap. In the central portion, there is a defect that the sheet is detected because it is far from the reference line CD compared with the end portion. However, in the present invention, the number of constituent points between the sheets is determined by the average number of constituent points between the sheets. Compared to the number of points, it is possible to detect irregular paper alignment, non-uniform paper, etc., and the reference line used for counting is not a horizontal line but a bent line that matches the shape of the horizontal scanning line, Counting can be performed accurately regardless of the position of the sheet, and the number of constituent points between sheets can be easily compared. It should be noted that an average calculated value for a plurality of sheets may be used as the average number of constituent points between sheets.

  In the present invention, the number of constituent points between the constituent points determined to be the back portion of the paper and the constituent points determined to be the back portion of the paper are sequentially calculated, and the calculated number of constituent points between the respective constituent points is calculated. The average value between the average component points is divided by the value obtained by subtracting 1 from the number of component points between the component point first determined for the paper back and the component point finally determined for the paper back. Compared with the value obtained by adding and subtracting 25% to 50% of the divided value to the value divided to eliminate the influence of individual differences in paper width, the value obtained by subtracting all In many cases, when the value is smaller than the added value, the count value of the sheet is displayed as normal counting is being performed.

Details of comparison of the number of constituent points between sheets are shown below.
G is the number of constituent points between the constituent point first determined as one sheet and the constituent point determined last as one sheet, and is divided by a value obtained by subtracting 1 from the counted number. The average number of points of the component points is calculated, and this is set as H. When the number of sheets is 30, H is G ÷ 29, which means the interval width (number of components) per sheet. Next, since there is an individual difference in the sheet, in order to give an allowable value in consideration of this, a value obtained by multiplying the calculated average value H by a value from 25% to 50% is set as I. An allowable width is an interval width of 0.25 to 0.5 per sheet. Here, the allowable width may be thicker or thinner, so in the case of thicker, I is added to H to become J, to be a thicker allowable width, and in the case of thinner, I is set to H. Subtract K to obtain a thinner allowable width. Compare the actual measured point width x between each sheet with J and K, and if the actual score obtained is greater than J and less than K, the abnormal back spacing The abnormal state of the sheet width can be detected and displayed as the number of constituent points.

  At the time of counting, when the score of the component points between the respective sheets is normal, the counting is performed with high accuracy. When the score of the component points between the sheets is incorrect, the counting is performed with low accuracy. When the score between the component points can be prevented by displaying whether the score between the component points is normal or incorrect at the same time as displaying the count value. Can be clearly displayed to the operator by changing the color of the count value displayed on the computer screen.

  As described above, the reference used for counting is a bent line that matches the shape of the scanning line, so that counting can be performed under the same conditions regardless of the position of the sheet. Stable and accurate counting is possible because paper misalignment and non-uniform paper can be detected.

DESCRIPTION OF SYMBOLS 1 Folded paper 2 Back part 3 Holding plate 4 Illuminating device 5 Bright part 6 Shadow part 7 Television camera 8 Image monitor 9 Analog-digital conversion circuit 10 Computer 11 Computer monitor

Claims (2)

  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 formed in the analog color TV camera from the front with the holding plates on both sides and the backs of the aligned plural sheets, and the shadow portion of the recess is the analog color television. The color image signal obtained from the camera is imaged so as to be perpendicular to the horizontal scanning line of the color image signal, and the analog signal of the horizontal scanning line of the back imaging unit of the obtained analog color image signal of the red, green, and blue colors of the analog signal The intensity is converted into a multivalued value for each minimum resolution unit of the analog color TV camera from one end to the other end by a color analog-digital conversion circuit, and the converted red, green, and blue colors The strength value of From one end to the other end, the horizontal scanning lines of the three colors of red, green, and blue are stored in order corresponding to the constituent points of the digital signal composed of the number of resolutions of the analog color TV camera. The composition point for one line is uniformly divided into 8 to 20, and the value of the preset lower limit line is adopted as the lower limit value, and the composition within the range in each divided range for each of red, green, and blue Obtain the average value of the color intensity of the points, use this as the value of the central point of the division range, and adopt the values at both ends as the preset lower limit line values. Connect the values of the central component points one after the other and connect to the other end to form a reference bend line, adopt the value on that line as the reference value corresponding to each component point, from the one end to the other end the horizontal The measurement signal of the color intensity of the constituent point for one scanning line For each constituent point, a constituent point having a color stronger than the reference value is determined by comparing the constituent point value with the corresponding reference value, and the color strength of the determined constituent point is determined by the horizontal scanning lines before and after. The strength of the color of the determined component point before and after the comparison is compared with the component point having a value of 25% to 75% of the value obtained by dividing the number of component points for one line by the scheduled number of sheets. When all the colors of the component points are stronger than the shaded area, it is determined as a non-shadow area, the determined non-shadow area is regarded as the back of the paper, the number of backs is added up, and the number of sheets is counted. The number of composing points between the composing point and the composing point determined next as the back of the paper is sequentially calculated, and the number of composing points between the calculated composing points is first determined as the back of the paper. The average number is calculated by dividing the number of constituent points between the point and the constituent point of the last determined paper back by the value obtained by subtracting 1 from the expected number of sheets. The average value between the various constituent points is obtained, and compared with the value obtained by adding and subtracting the value of 25% to 50% of the divided value to the value divided in order to remove the influence due to the individual difference of the paper width, A high-precision counting method for folded paper, characterized in that when all of the values are larger than the subtracted value and smaller than the added value, the paper count value is displayed as normal counting is performed.   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 in the analog monochromatic television camera from the front with the holding plates on both sides and the backs of the aligned plural sheets, and the shadow portion of the concave portion is the analog monochromatic television. The monochrome image signal obtained from the camera is imaged so as to be perpendicular to the horizontal scanning line, and the intensity of the luminance of the analog signal for one horizontal scanning line of the back imaging unit of the obtained analog monochrome image signal is From one end to the other end by a monochrome analog-to-digital conversion circuit to convert to a multivalued value for each minimum resolution unit of the analog monochrome TV camera, and the converted luminance intensity value is The other end is sequentially stored in correspondence with each constituent point of the digital signal having the number of resolutions of the analog monochrome television camera, and the stored constituent points for one horizontal scanning line are uniformly 8 to 20 Divide and adopt the value of the preset lower limit line as the lower limit value, and in each divided range, find the average value of the intensity of the luminance of the component points within the range, and calculate this value at the center of the divided range The value of the component point is used, and the value at both ends is adopted as the value of the preset lower limit line. A line is formed, the value on the line is adopted as a reference value corresponding to each constituent point, and the measurement signal of the luminance intensity of the constituent point for one horizontal scanning line from one end to the other end is sequentially provided. For each component point, the value of the component point A component point having a higher luminance than the reference value is determined, and the luminance intensity of the determined component point is determined. The number of component points for one horizontal scanning line before and after is counted. If the intensity of the determined component point is all stronger than the intensity of the component points before and after the comparison, compared to the component points with a value between 25% and 75% of the value divided by It is determined as a shadow part, the determined non-shadow part is set as the back of the paper, the number of backs is added up to count the number of sheets, and the component point determined as the back of the paper and then the back of the paper are determined The number of component points between the calculated component points is sequentially calculated, and the calculated number of component points between the respective component points is the first component point determined for the paper back and the last component point determined for the paper back Divide the number of component points between the two by the value obtained by subtracting 1 from the expected number of counts to obtain an average value between the average component points. Compared with the value obtained by adding and subtracting 25% to 50% of the divided value to the value divided to eliminate the effect of individual differences in paper width, all are larger than the subtracted value. A method for accurately counting folded sheets, wherein the count value of the sheet is displayed as normal counting is performed when the value is smaller than the set value.

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