JP2011026045A - Colorimetry system, paper feeding error detection method of colorimetry system and paper feeding error detection program of colorimetry system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a colorimetry system being high in cost performance. <P>SOLUTION: This colorimetry system has a colorimetry device, pattern information recorded on a recording object member 1 of feeding paper by a paper feeder 200, paper feeding pitch information of the paper feeder 200. The pattern information includes position information on a pair of position detecting patterns recorded on a first area of the recording object member 1, and performs colorimetry on the pair of respective position detecting patterns by the colorimetry device in a position on the recording object member detectable from the paper feeding pitch information and the position information on the pair of position detecting patterns, and detects a paper feeding error in the recording object member from a colorimetry result by the colorimetry device and information on the pair of position detecting patterns. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a color measurement system, a paper feed error detection method for the color measurement system, and a paper feed error detection program for the color measurement system.

  Among products that are produced in large quantities, such as product packages and posters, there are products that are created using printing or recording means such as a recording device. In such a case, if there is a difference in color among products, an impression that is undesirable from the viewpoint of quality may be given to a person. There are various factors that cause the color difference, such as a difference in the quality of the recording member, a difference in temperature, and a difference in air humidity. Also, different recording apparatuses often have different settings for recording the same color. For this reason, the color actually recorded (printed) using the recording apparatus is measured, and the adjustment amount obtained from the result of the color measurement is fed back to adjust the setting of the recording apparatus.

  The object to be measured is often a color chart. The color chart is obtained by recording and arranging a plurality of colors in a block shape having a specific size, and the color measurement is performed for each of the plurality of block-shaped colors.

  Color measurement of the color chart is performed by a colorimeter. For the colorimeter, a hand-held colorimeter that scans the color chart manually to measure the color, or a recorded material on which the color chart has been recorded using a conveyor is automatically transported to the colorimeter area. There is a type of colorimeter that performs colorimetry. Since manual scanning makes it difficult to repeat the same scanning, introduction of a colorimeter (colorimetry system) of a type that automatically performs colorimetry is in progress.

  However, in the type of colorimeter that automatically performs color measurement, if the recording member is not properly conveyed, the color measurement positions of each of a plurality of colors are not accurate, and are affected by surrounding colors. Therefore, accurate colorimetry cannot be performed. Therefore, in order to calculate an accurate adjustment amount to be fed back to the recording apparatus, it is an important point whether the recording member can be appropriately conveyed to the colorimeter. Just as the recorded color difference is caused by the quality of the recorded member, the temperature, the humidity of the air, etc., the transport amount of the recorded member is also the quality of the recorded member, the temperature This is caused by the difference in the air and the humidity of the air.

  A means for confirming whether or not the recording member is appropriately conveyed is, for example, printing a resist marker having a predetermined width with respect to the roll-out direction of the roll paper in Patent Document 1 and printing the resist by a resist sensor. There has been proposed a method of detecting roll paper skew by detecting the width of the marker in the roll paper carry-out direction.

Japanese Patent Laid-Open No. 5-31978

  However, having a dedicated sensor for detecting whether or not the recording member is properly conveyed has a problem that the cost of the colorimeter increases.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples. Unless otherwise specified, the paper feed pitch information includes both the paper feed pitch length and the paper feed pitch number.

[Application Example 1]
One color measurement system according to this application example includes a color measurement device, pattern information recorded on a recording member to be fed by a paper feeder, and paper feed pitch information of the paper feeder, The pattern information includes position information of a pair of position detection patterns recorded in the first area of the recording member and colorimetric information of the pair of position detection patterns, and includes the paper feed pitch information and the pair of position detection patterns. Each of the pair of position detection patterns is subjected to color measurement by the color measurement device at a position on the recording member that can be detected from position information of the position detection pattern, and the result of the color measurement by the color measurement device and the pair of the position detection patterns are detected. The sheet feeding error of the recording member is detected from the colorimetric information of the position detection pattern.

  According to this configuration, the pair of position detection patterns recorded in the first area of the recording member are measured using the color measurement device included in the color measurement system, thereby detecting the paper feed state of the recording member. In addition, since there is no dedicated sensor, an increase in cost can be suppressed.

  Further, it is possible to detect the colorimetric position of the pair of position detection patterns on the recording member from the position information of the pair of position detection patterns and the paper feed pitch information of the paper feeder as the pattern information. It is possible to detect a paper feed error from the color measurement results of the pair of position detection patterns. If the paper feed error is known, the correction amount of the paper feed pitch can be calculated.

[Application Example 2]
In one colorimetry system according to the application example, the pattern information includes information on each shape of the pair of position detection patterns, and the information on each shape includes information on each of the pair of position detection patterns. Including a plurality of unit blocks arranged in a staggered manner, each of the plurality of unit blocks being adjacent to each other in a direction orthogonal to the paper feed direction, and the plurality of unit blocks. 1st unit block located in one edge part is located in the foremost line in the paper feeding direction, and the second unit block located in the other one edge part is located in the last line in the paper feeding direction. Each of the unit blocks located between the first unit block and the second unit block among the plurality of unit blocks is located in the first unit block. And recorded in a position shifted backward by a predetermined length from the unit block adjacent to the side and shifted forward by the predetermined length from the unit block adjacent to the second unit block. Is preferred.

  According to this configuration, each of the plurality of unit blocks is continuously shifted by a predetermined length from the first unit block located at one end to the second unit block located at the other end. Since the unit block that can be recognized most easily is the unit block at which the unit block is counted from the first unit block or the second unit block, the error in the paper feed amount can be easily determined. Can know. The predetermined length of the unit block deviation is set with the expectation that the colorimetric position by the colorimetric device will be on one of the unit blocks even if the paper feed amount of the recording member is deviated. It is the length to do. For example, it may be the same as the initial set value of the paper feed pitch length.

[Application Example 3]
In one colorimetry system according to the application example, the pattern information further includes information on a color measurement pattern recorded in a second area surrounded by the first area of the recording member, The position information of the pair of position detection patterns includes that one position detection pattern of the pair of position detection patterns is recorded on the front side of the second area in the paper feed direction, One position detection pattern is recorded on the rear side of the second area in the paper feed direction, and the first color measurement is performed on the one position detection pattern, and the other one A second color measurement is performed on the position detection pattern, and is calculated based on the color measurement result of each of the plurality of unit blocks in each of the pair of position detection patterns and the paper feed pitch information. Wherein the paper feed amount of the recording member detected a paper feed error of the recording member, it is preferable to perform the correction of the paper feeding pitch information based on the paper feed error.

  According to this configuration, it is possible to detect a paper feed error from the first color measurement result, the second color measurement result, and the paper feed pitch information, which are color measurement results at positions before and after the second region. It is possible to calculate a correction value of the paper feed pitch information for appropriately measuring the color measurement pattern.

[Application Example 4]
In one color measurement system according to the application example described above, it is preferable that the correction is calculated before color measurement of the color pattern to be measured.

  According to this configuration, the color measurement of the measured color pattern can be performed at an appropriate paper feed pitch by performing the color measurement of the measured color pattern after correction.

[Application Example 5]
In one color measurement system according to the application example, the correction value is calculated after the first color measurement, the color measurement of the color pattern to be measured, and the second color measurement are continuously performed. Is preferred.

  According to this configuration, it is possible to know whether or not the color measurement of the color pattern to be measured is performed with suitable paper feed pitch information.

[Application Example 6]
In one color measurement system according to the application example, the pattern information further includes information on a color measurement pattern recorded in a second area surrounded by the first area of the recording member, The position information of the pair of position detection patterns includes that one position detection pattern of the pair of position detection patterns is recorded on the front side of the second area in the paper feed direction, One position detection pattern is recorded on the rear side of the second area in the paper feed direction, and the first color measurement is performed on the one position detection pattern, and the first A first paper feed error from the color measurement results of the plurality of unit blocks in the color measurement and the paper feed pitch information to the point where the recording member has performed the first color measurement is detected, and the first Paper feeding A first correction value for correcting the paper feed pitch information is calculated from the difference, the paper to be recorded is fed by the paper feed pitch information corrected by the first correction value, and the measured color pattern And the second color measurement for the other one of the position detection patterns, and from the first color measurement result, the second color measurement result, and the paper feed pitch information after correction. It is preferable to calculate a second correction value for the corrected paper feed pitch information from the distance between each of the obtained pair of position detection patterns.

  According to this configuration, the first correction value based on the first color measurement result is calculated, and the color measurement pattern and the second color measurement are performed on the paper feed pitch after correction based on the first correction value. Thus, the color measurement pattern can be measured at an appropriate paper feed pitch, and a pair of position detection patterns obtained from the first color measurement result, the second color measurement result, and the corrected paper feed pitch information. The second correction value for the paper feed pitch information after correction can be calculated from the distance between the two, and the second region can be determined by confirming what the second correction value is. It is possible to confirm whether or not the colorimetry is correctly performed. If the second correction value is smaller than the predetermined value, it can be determined that the color measurement of the color pattern to be measured has been performed appropriately. The predetermined value is a value determined based on the identification condition of the measured color pattern recorded in the second area. For example, the predetermined value is a value that can be determined based on the size of each color block in the color chart.

[Application Example 7]
In one colorimetry system according to the application example described above, the member to be recorded is fed from the colorimetry result and the colorimetry information of each of the plurality of unit blocks in at least one of the pair of position detection patterns. It is preferable to detect that the paper is fed obliquely with respect to the direction.

  According to this configuration, the color measurement information of the pair of position detection patterns that the color measurement system has in advance is compared with the color measurement results of a plurality of unit blocks that form one of the pair of position detection patterns. Thus, it is possible to easily detect that the recording member is skewed.

[Application Example 8]
In one colorimetry system according to the application example, the first region and the second region further include a blower unit on the near side of the colorimetric device in the paper feeding direction and blown by the blower unit. It is preferable that color measurement by the color measurement device is performed on the area in the area.

  According to this configuration, even if it is necessary to elapse a predetermined time until the color of the pattern recorded in the first area and the second area is stabilized, the air is blown to the first area and the second area using the blower. By doing so, the color of the pattern can be stabilized in a time shorter than the predetermined time.

[Application Example 9]
One colorimetry system according to the application example described above preferably includes the paper feeder.

  According to this configuration, it is not necessary to prepare a paper feeder outside the color measurement system.

[Application Example 10]
A method for detecting a paper feed error of one colorimetry system according to this application example includes pattern information recorded on a recording member to be fed by a paper feeder and paper feed pitch information of the paper feeder. The pattern information includes position information of a pair of position detection patterns recorded in the first area of the recording member, colorimetric information of the pair of position detection patterns, and the first area of the recording member. Information on the measured color pattern recorded in the second area surrounded by the second area, and the position information on the pair of position detection patterns includes the position detection pattern on which the second area is one of the pair of position detection patterns. Between each of the pair of position detection patterns, each of the pair of position detection patterns includes a plurality of unit blocks arranged in a shifted manner, and each of the pair of position detection patterns. In each of the plurality of unit blocks, adjacent unit blocks are continuous in a direction orthogonal to the paper feeding direction, and the first unit block located at one end of the plurality of unit blocks is disposed. Is located in the foremost row in the paper feed direction, and the second unit block located at the other end is located in the last row in the paper feed direction, and the first unit block and the first unit block Each of the unit blocks positioned between the two unit blocks is shifted backward by a predetermined length from the unit block adjacent to the first unit block side, and is adjacent to the second unit block side. In each position of the pair of position detection patterns detected by the paper feeder from paper feed pitch information, including being recorded shifted ahead of the predetermined length from the block, Each of the pair of position detection patterns is measured by a colorimetric device, a paper feed error of the recording member is calculated from the color measurement results of the pair of position detection patterns and the color measurement information, and the paper feed The correction value of the paper feed pitch information is calculated from the error.

  According to this method, since the pair of position detection patterns recorded in the first area of the recording member is detected by measuring the color using a color measurement device included in the color measurement system, paper feeding of the recording member is performed. Since there is no dedicated sensor for detecting the state, an increase in cost can be suppressed. In addition, since each of the pair of position detection patterns is composed of a plurality of unit blocks arranged in a shifted manner, a pair is detected at a position detected from the pattern information and the paper feed pitch information that the color measurement system has. By measuring the position detection pattern, an error in the paper feed amount is detected from the colorimetric information held by the colorimetry system, the colorimetric result, and the shift amount of each predetermined length of the unit block. Accordingly, the correction amount of the paper feed pitch can be calculated. By calculating the correction amount of the paper feed pitch for each of the pair of position detection patterns located apart from each other across the second region, the correction value for controlling the paper feed of the appropriate recording member is calculated. Is possible. The predetermined length is a length that is set in consideration of the fact that the color measurement position by the color measurement device comes on one of a plurality of unit blocks even if the paper feed amount of the recording member is deviated. . For example, it may be the same as the initial set value of the paper feed pitch length.

[Application Example 11]
In the paper feeding correction value detection method for one colorimetry system according to the application example described above, the first area and the second area may be blown before the colorimetry device performs colorimetry. preferable.

  According to this method, even if it is necessary to elapse a predetermined time until the color of the pattern recorded in the first area and the second area is stabilized, the air is blown to the first area and the second area using the blower. By doing so, the color of the pattern can be stabilized in a time shorter than the predetermined time.

[Application Example 12]
A paper feed error detection program of one colorimetry system according to this application example includes pattern information recorded on a recording member fed by a paper feeder and paper feed pitch information of the paper feeder. The pattern information includes position information of a pair of position detection patterns recorded in the first area of the recording member, colorimetric information of the pair of position detection patterns, and the first area of the recording member. Information of the color pattern to be measured recorded in the enclosed second area, and the position information of the pair of position detection patterns includes the position detection pattern of the pair of position detection patterns in the second area. Sandwiched between the other one of the position detection patterns, each of the pair of position detection patterns includes a plurality of unit blocks arranged in a shifted manner, and each of the pair of position detection patterns In each of the plurality of unit blocks, adjacent unit blocks are continuous in a direction orthogonal to the paper feed direction, and the first unit block is located at one end of the plurality of unit blocks. Is located in the foremost row in the paper feed direction, and the second unit block located at the other end is located in the last row in the paper feed direction, and the first unit block and the first unit block Each of the unit blocks positioned between the two unit blocks is shifted backward by a predetermined length from the unit block adjacent to the first unit block side, and is adjacent to the second unit block side. Each position of the pair of position detection patterns detected by the paper feeder from the paper feed pitch information. In this case, a paper feed error of the recording member is calculated based on a first process in which the color measurement device performs the color measurement of each of the pair of position detection patterns, the color measurement result in the first process, and the color measurement information. And a third process for calculating a correction value of the paper feed pitch information from the paper feed error.

  According to this program, the color measurement system has pattern information recorded on a recording member to be fed by a paper feeder and paper feed pitch information of the paper feeder, and the color measurement system has in advance in the first process. Color measurement of a pair of position detection patterns is performed from the pair of position detection patterns and the paper feed pitch information, and the color measurement results of the first process and the color measurement information previously held in the color measurement system in the second process Thus, the paper feed error of the recording member can be detected, and the correction value of the paper feed pitch information can be calculated from the paper feed error detected in the second process in the third process. As a result, it is possible to obtain paper feed pitch information that can appropriately perform color measurement of the color pattern to be measured.

The figure which shows the image of the color measurement system in all the embodiments. The figure which shows the image of the to-be-recorded member in all the embodiments. The figure which shows the relationship between the position detection pattern and colorimetry area in 1st, 5th, 8th embodiment. The figure which shows the relationship between the position detection pattern and colorimetry area in 1st Embodiment. The figure which shows the relationship between the position detection pattern and colorimetry area in 1st Embodiment. The figure which shows the relationship between the position detection pattern and colorimetry area in 1st Embodiment. The figure which shows the relationship between the position detection pattern and colorimetry area in 2nd Embodiment. The figure which shows the relationship between the position detection pattern and colorimetry area in 3rd Embodiment. The figure which shows the relationship between the position detection pattern and colorimetry area in 4th Embodiment. The figure which shows the relationship between the position detection pattern and colorimetry area in 4th Embodiment. The figure which shows the position detection pattern in 5th Embodiment. The figure which shows the flowchart in 7th Embodiment. The figure which shows the flowchart in 8th Embodiment. The figure which shows the flowchart in 9th Embodiment. The figure which shows the flowchart in 10th Embodiment. The figure which shows the subroutine in 7th Embodiment-10th Embodiment. The figure which shows the subroutine in 7th Embodiment-10th Embodiment. The figure which shows the subroutine in 7th Embodiment-10th Embodiment.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The figure includes exaggerated parts for easy understanding, and the actual pattern shape may be different from the figure.

  FIG. 1 shows a colorimetric system 100, a paper feed unit 200, and a recording member 301 used in the description of the embodiment of the present invention. The color measurement system 100 includes a color measurement system controller (not shown), a color measurement device 101 having a color measurement device (not shown), and a drying fan 102 therein. The colorimeter 101 is driven by a colorimeter driving unit (not shown) in a direction orthogonal to the paper feed direction of the recording member 301. The drying fan 102 and the color measuring device driving unit are controlled by the color measuring system control unit. A color chart 306 is recorded on the recording member 301. In the paper feed direction, a first marker 304 is recorded on the front side of the color chart 306, and a second marker 305 is recorded on the rear side of the color chart 306. ing.

  FIG. 2 is a diagram showing a first area 302 and a second area 303 in the recording member 301. The second area 303 is surrounded by the first area 302. In FIG. 1, the area where the color chart 306 is recorded is a part of the second area 303. Although a part of the second area 303 is used here, a color chart may be recorded in the entire second area 303. In addition, when the first marker 304, the second marker 305, and the color chart 306 are not sufficiently dried after recording, the drying is performed by blowing air to the recording member 301 by the drying fan 102 before colorimetry. Color measurement in the state is possible.

(First embodiment)
FIG. 3 shows the recording member 1 used in this embodiment. In the first area 2, a first position detection pattern 4 and a second position detection pattern 5 are recorded. The second area 3 is an area where a colorimetric object is recorded. The color measurement target is not particularly specified in the present embodiment.

  FIG. 3 shows the colorimetric area 8 of the colorimeter 101 and the traveling direction 9 of the colorimeter 101 during colorimetry. FIG. 3 shows the recording position 6 of the first position detection pattern 4 and the recording position 7 of the second position detection pattern 5. The recording position 6 and the recording position 7 are the positions of the centers of the first position detection pattern 4 and the second position detection pattern 5, respectively. The paper feeding unit 200 recognizes the positions of the recording position 6 and the recording position 7 from the paper feeding pitch information from the leading end 11 of the recording member 1. The paper feed position of the recording member 1 recognized by the paper feed unit 200 based on the paper feed pitch information is referred to as a theoretical recording position. Hereinafter, a theoretical recording position with respect to the recording position 6 will be referred to as a theoretical recording position 61, and a theoretical recording position with respect to the recording position 7 will be referred to as a theoretical recording position 71.

  Each of the first position detection pattern 4 and the second position detection pattern 5 is configured by connecting a plurality of rectangular unit blocks. Each unit block is recorded with a length P1 shifted from the adjacent unit block in the paper feed direction 10 of the recording member 1. In the present embodiment, the number of unit blocks of each of the first position detection pattern 4 and the second position detection pattern 5 is an odd number. By being composed of an odd number of unit blocks, the recording position 6 and the recording position 7 are positions indicating the center positions of the unit blocks at the respective centers.

  The color measurement results of the first position detection pattern 4 and the second position detection pattern 5 are output as Lab values. In the present embodiment, each unit block is black. Therefore, for example, when the recording position 6 and the theoretical recording position 61 coincide, the color measurement result of the first position detection pattern 4 has the smallest L value of the unit block 45 located at the center of the first position detection pattern 4. Value. The colorimetry system 100 stores the L value state of each unit block when colorimetry is performed at the recording position 6 as one piece of pattern information. The state of the stored L value may be any as long as each unit block can be identified. For example, the L value of each unit block may be stored, or the position of the unit block having the highest L value and the position of the unit block having the lowest L value may be used. In the present embodiment, the L value of the unit block 45 recorded at the center of the first position detection pattern 4 is lower than the L values of the other unit blocks, and the position is located at both ends of the first position detection pattern 4. It is assumed that the L values of the unit blocks 41 and 49 to be performed are higher than the L values of the other unit blocks, and the change rates of the L values from the unit blocks 41 to 49 are stored in advance.

  FIG. 4 shows a case where the recording member 1 is fed from the leading end 11 to the theoretical recording position in the paper feeding direction 10 by the paper feeding unit 200 and the recording position 6 and the theoretical recording position 61 coincide. The colorimetric area 80 of the colorimeter 101 performs colorimetry while moving in the direction indicated by 90 by the size of the unit block. By performing color measurement by moving the color measurement area according to the position of the size of the unit block, it is possible to obtain a color measurement result for each of the unit blocks.

  FIG. 4 shows a colorimetric area 81 in the unit block 45 at the center of the first position detection pattern 4. FIG. 5 shows a colorimetric area 82 of the unit block 41 which is the front row in the paper feed direction 10 of the first position detection pattern 4. FIG. 6 shows the color measurement area 83 of the unit block 49 which is the last row in the paper feed direction 10 of the first position detection pattern 4. As can be seen from the area occupied by each unit block in the color measurement areas 81, 82 and 83 in FIGS. 4 to 6, the color measurement result of the first position detection pattern 4 is the L of the unit blocks 41 and 49 located at both ends. The value is higher than the other unit blocks, and the L value of the unit block 45 located at the center is lower than the other unit blocks. This color measurement result coincides with the color measurement result at the recording position 6 stored in advance in the color measurement system 100. As a result, the color measurement system 100 can recognize that the recording member 1 has been fed at an appropriate paper feed pitch, and the paper feed unit 200 need not correct the paper feed pitch.

(Second Embodiment)
This embodiment is an example in the case where the recording position 6 and the theoretical recording position 61 do not match.

  FIG. 7 is a diagram illustrating a case where the recording position 6 does not reach the color measurement position when the color measurement system 100 determines that the theoretical recording position 61 has reached the color measurement position. As can be seen from FIG. 7, the L value of the unit block 43 is higher than the L values of the other unit blocks, and the unit block 49 in the last row cannot enter the colorimetric area 83, and the L value of the colorimetric area 83. Becomes higher than the L value of other unit blocks. This color measurement result does not match the color measurement result at the recording position 6 stored in advance in the color measurement system 100. Therefore, the color measurement system 100 can determine that the paper feed pitch needs to be corrected in order to appropriately feed the recording member 1.

  In the case of this embodiment, in the measurement of each unit block, the color measurement result of the unit block 43 has the lowest L value. The unit block 43 is a block described with a P1 × 2 shift ahead of the unit block 45 that should originally have the lowest L value in the paper feed direction 10. For this reason, the paper feed amount to the theoretical recording position 61 is less by P1 × 2. Assuming that the paper feed pitch number from the leading end 11 of the recording member 1 to the theoretical recording position 61 is m, the paper feed pitch length is corrected by increasing {(P1 × 2) / m}. It can be the pitch length.

(Third embodiment)
This embodiment is another example when the recording position 6 and the theoretical recording position 61 do not match.

  FIG. 8 is a diagram illustrating a case where the recording position 6 has passed the color measurement position when the color measurement system 100 determines that the theoretical recording position 61 has reached the color measurement position. As can be seen from FIG. 8, the L value of the unit block 47 is lower than the L values of the other unit blocks, and the unit block 41 in the front row cannot enter the colorimetric area 82, and the L value of the colorimetric area 82 Becomes higher than the L value of other unit blocks. This color measurement result does not match the color measurement result at the recording position 6 stored in advance in the color measurement system 100. Therefore, the color measurement system 100 can determine that the paper feed pitch needs to be corrected in order to appropriately feed the recording member 1.

  In the present embodiment, in the measurement of each unit block, the color measurement result of the unit block 45 has the lowest L value. The unit block 47 is a block described with a P1 × 2 shift behind the unit block 45 which should originally have the lowest L value in the paper feed direction 10. Therefore, the paper feed amount to the theoretical recording position 61 is P1 × 2 larger. Assuming that the number of paper feed pitches from the leading end 11 of the recording member 1 to the theoretical recording position 61 is m, the paper feed pitch length is corrected by reducing {(P1 × 2) / m}. It can be the pitch length.

(Fourth embodiment)
This embodiment is another example when the recording position 6 and the theoretical recording position 61 do not match.

  FIG. 9 shows a colorimetric system when the theoretical recording position 61 comes to the colorimetric position when the recording member 1 is fed in the first skew state where the right side is preceded in the paper feeding direction 10. It is a figure which shows the case where 100 judges. Further, FIG. 10 shows that when the recording member 1 is fed in the second skew state where the left side is preceded in the paper feeding direction 10, the theoretical recording position 61 reaches the colorimetric position. It is a figure which shows the case where the system 100 judges.

  When the recording member 1 is fed in a skewed state, whether in the first skewed state or the second skewed state, the L value changes between adjacent unit blocks. Is different from the rate of change of the L value between adjacent unit blocks obtained from the state stored in advance in the colorimetric system 100. In contrast to the ratio of the change in L value between adjacent unit blocks obtained from the state stored in advance in the colorimetry system 100, the change in the L value between adjacent unit blocks in the first oblique state. In the case of the second oblique state, the ratio of the change in the L value between adjacent unit blocks is increased.

(Fifth embodiment)
The present embodiment is a method of correcting the paper feed pitch information using the first position detection pattern 4 and the second position detection pattern 5. FIG. 11 shows the recording position 6 and the theoretical recording position 61 of the first position detection pattern 4 and the recording position 7 and the theoretical recording position 71 of the second position detection pattern 5. In the present embodiment, it is assumed that the paper feed pitch number is set to a value suitable for the color measurement of the color measurement pattern in the second area.

  The paper is fed from the leading end 11 of the recording member 1 by the paper feeding unit 200. First, at the theoretical recording position 61, the position of the unit block having the lowest L value in the first position detection pattern 4 is detected. Since the colorimeter 101 measures each unit block while moving by the size of the unit block, the position of the unit block having the lowest L value can be easily known. As shown in FIG. 11, the theoretical recording position 61 is at the center of the unit block 44, and the unit block having the lowest L value is the unit block 44.

  After the color measurement is performed at the theoretical recording position 61, the recording member 1 is fed by the paper feeding unit 200, and at the theoretical recording position 71, the unit block having the lowest L value in the second position detection pattern 5 is obtained. Detect position. As shown in FIG. 11, the theoretical recording position 71 is at the center of the unit block 51, and the unit block having the lowest L value is the unit block 51. Here, the distance between the first position detection pattern 4 and the second position detection pattern 5 is the distance from the theoretical recording position 61 to the theoretical recording position 71 determined by the paper feed pitch number and the paper feed pitch length. Distance.

  If the distance between the recording position 6 and the recording position 7 that can be recognized from the paper feed pitch number is D, the theoretical distance is shorter by the amount of deviation of two unit blocks (D−P1 × 3). . If the number of paper feed pitches is m, an appropriate paper feed pitch can be obtained by performing correction to increase the {(P1 × 3) / m} paper feed pitch length.

(Sixth embodiment)
The present embodiment is an embodiment including the first to third embodiments and the fifth embodiment. First, a first correction value is obtained from the relationship between the recording position 6 of the first position detection pattern 4 and the theoretical recording position 61 with the first paper feed pitch information, and the first paper feed pitch information is corrected. The second paper feed pitch information is calculated by using the correction value of 1. Regarding this, please refer to the first to third embodiments.

  Next, after the color measurement of the second area 3 is performed with the second paper feed pitch information, the paper to be recorded 1 is fed to the theoretical recording position 71.

  The color measurement of the second position detection pattern 5 is performed at the theoretical recording position 71, and the position of the unit block having the lowest L value of the first position detection pattern 4 and the lowest L value of the second position detection pattern 5 are measured. Between the recording position 6 and the recording position 7 that can be recognized from the theoretical distance between the first position detection pattern 4 and the second position detection pattern and the second paper feed pitch information from the relationship with the position of the unit block. The second correction value is obtained from the distance D. Please refer to the fifth embodiment in this regard.

  When the second correction value is within an allowable range in which the color measurement of the color measurement pattern in the second area 3 can be correctly performed, it can be determined that the color measurement in the second area 3 has been performed without any problem.

(Seventh embodiment)
The present embodiment is a program for implementing the fifth embodiment described above in the color measurement system. A flowchart is shown in FIG. The recording member used in this embodiment is the recording member 1 shown in FIG. 11, and the image of the color measurement system is FIG. Therefore, the terminology of the above-described embodiment is used as it is in this embodiment. FIG. 12 shows a flowchart 1 of the program of the present embodiment. Further, in this flowchart, description of initial settings necessary for performing processing is omitted. The necessary initial settings include, for example, the paper feed pitch length and the number of paper feed pitches from the leading edge of the recording member 1 to the theoretical recording position 61, the theoretical recording position 71, and the leading edge of the second area. , And a unit block displacement amount P1.

  The first processing for performing color measurement of the first position detection pattern 4 and the second position detection pattern 5 of the recording member 1 is processing 1001 to processing 1004 in the flowchart 1. When the process 1000 detects the input of the recording member, the paper feeding unit 200 feeds the recording member 1 so that the theoretical recording position 61 of the first position detection pattern 4 is in the colorimetric area (processing 1001). .

  The colorimeter 101 measures each unit block while moving the colorimetric area of the recording member 1 in units of a predetermined unit block, and specifies the position of the block having the smallest L value (processing 1002). ). In FIG. 11, the center of the color measurement area is on the theoretical recording position 61. As can be seen from this, in this embodiment, the L value of the unit block 44 is the smallest. Although not described in the flowchart, it is preferable to calculate the rate of change of the L value of adjacent unit blocks at this time and store it in the memory in the colorimetric system 100.

  Next, the paper feeding unit 200 feeds the recording member 1 to the theoretical recording position 71 of the second position detection pattern 5 (processing 1003), and the colorimeter 101 measures in units of a predetermined unit block. Color measurement is performed for each unit block while moving the color area, and the position of the block having the smallest L value is specified (processing 1004). In FIG. 11, the L value of the unit block 51 is the smallest. Similar to the color measurement in the case of the first position detection pattern 4, although not described in the flowchart, the ratio of the change in the L value of the adjacent unit block is also calculated and stored in the memory in the color measurement system 100 at this time. It is good to keep.

  By the first process described above, it is possible to detect a deviation between the theoretical recording positions 61 and 71 and the recording positions 6 and 7 on the respective recording members 1. The detection accuracy depends on the amount of misalignment of unit blocks and the initial setting value of the paper feed pitch length. It is preferable that the first processing is performed after setting these values appropriately in accordance with the color measurement pattern recorded in the second area.

  The second processing is processing 1005 to processing 1008 in the flowchart 1. A process 1005 is a process for obtaining a theoretical distance between the first position detection pattern 4 and the second position detection pattern 5. Let E be the theoretical distance found in process 1005.

  The position of the unit block where the L value is minimized in the first position detection pattern 4 and the second position detection pattern 5 is known by the first processing. In FIG. 11, the theoretical recording position 61 passes through the center of the unit block 44. Here, when the theoretical recording position 61 (71) reaches the colorimetry area before the recording position 6 (7), a minus sign is attached to the deviation amount. As a result, the shift amount (first shift amount) at the theoretical recording position 61 is -P1 (process 1006). The theoretical recording position 71 passes through the center of the unit block 51. There are four shifts, and the shift amount (second shift amount) at the theoretical recording position 71 is −P1 × 4 (processing 1007). Therefore, the amount of deviation of the paper feed amount from the theoretical recording position 61 to the theoretical recording position 71 is {(−P1 × 4) − (− P1 ×) = − P1 × 3} (processing 1008). Therefore, the corrected theoretical distance may be E + (P1 × 3).

  The third process is the process 1009 of the flowchart 1. When the paper feed pitch number from the theoretical recording position 61 to the theoretical recording position 71 is m, the correction value of the paper feed pitch length is {− (− P1 × 3) / m}. By applying this correction value, paper feed from the center of the first position detection pattern 4 to the center of the second position detection pattern 5 can be performed with the paper feed pitch number as m.

(Eighth embodiment)
The present embodiment is a program of the color measurement process 1 including the color measurement of the measured color pattern in the second area 3. A flowchart is shown in FIG. The color measurement system is the color measurement system 100 shown in FIG. 1, and the recording member is the recording member 1 shown in FIG. In the present embodiment, the color measurement of the pair of position detection patterns 4 and 5 is performed to determine whether or not the paper feed pitch information needs to be corrected, and the flow of performing the color measurement of the second region 3 after performing the necessary correction. Is shown. In order to avoid an increase in the description of the flowchart, all the detailed processing is not described in the flowchart, and what is determined to require additional explanation is described in text.

  First, when the recording member 1 is inserted, the paper feeding unit 200 is activated and the paper feeding of the recording member 1 is started (process 2000). When the paper feed of the recording member 1 is started, the processing is transferred to a subroutine “color measurement of the first position detection pattern” (processing 2001) shown in FIG.

  Processing in the process 2001 will be described. The paper feeding unit 200 feeds the recording member 1 until the theoretical recording position 61 reaches the colorimetric position (processing 4000). Next, control is passed to the subroutine “color measurement of unit block” (process 4001) shown in FIG. In process 4001, color measurement is performed on all unit blocks in the color measurement area centered on the theoretical recording position 61, and the color measurement results are stored (process 6000). A unit block having the lowest L value is identified from the colorimetric results of all stored unit blocks (process 6001). Subsequently, the unit block having the highest L value is specified from the colorimetric results of all the stored unit blocks (process 6002), and control is returned from the subroutine in process 4001. The error between the recording position 6 and the theoretical recording position 61 is calculated from the color measurement result of the process 4001 and the color measurement information that the color measurement system 100 has in advance. (Processing 4002). Control then returns from the subroutine in process 2001.

  It is determined from the result of the process 2001 whether the first position detection pattern 4 is within the allowable range (process 2002). Determining whether or not the process is within the allowable range in the process 2002 is determining whether or not the subsequent process can be continued. For example, when the colorimetric position is advanced to the theoretical recording position 61, but the theoretical recording position 61 does not come on any unit block of the first position detection pattern 4, the first position detection pattern 4 This corresponds to the case where the color measurement can be performed but it is determined from the color measurement result that the recording member 1 is skewed. If the colorimetry system 100 determines that the process cannot be continued, an error notification is given (process 2015), and the colorimetry process 1 is terminated.

  When the color measurement process is possible, control is passed to the subroutine “color measurement of the second position detection pattern” (process 2003) shown in FIG. First, the recording member 1 is fed so that the theoretical recording position 71 is positioned at the colorimetric position (processing 5000). Next, control is passed to the subroutine “Unit block colorimetry” (process 5001) shown in FIG. In process 5001, color measurement is performed on all unit blocks in the color measurement area centered on the theoretical recording position 71, and the color measurement results are stored (process 6000). A unit block having the lowest L value is identified from the colorimetric results of all stored unit blocks (process 6001). Subsequently, the unit block having the highest L value is identified from the colorimetric results of all the stored unit blocks (process 6002), and control is returned from the subroutine in process 5001. An error between the recording position 7 and the theoretical recording position 71 is calculated from the color measurement result of the process 5001 and the color measurement information that the color measurement system 100 has in advance. (Processing 5002). Control then returns from the subroutine in process 2003.

  It is determined from the result of the process 2003 whether or not the second position detection pattern 5 is within the allowable range (process 2004). Determining whether or not it is within the allowable range in the process 2004 means determining whether or not the subsequent process can be continued. For example, when the colorimetric position is advanced to the theoretical recording position 71 but no theoretical recording position 71 is present on any unit block of the second position detection pattern 5, the second position detection pattern 5 This corresponds to the case where the color measurement can be performed but it is determined from the color measurement result that the recording member 1 is skewed. If the colorimetry system 100 determines that the process cannot be continued, an error notification is given (process 2015), and the colorimetry process 1 is terminated.

  A paper feed correction value is calculated from the colorimetric results of processing 2001 and processing 2003 (processing 2005). Although specific processing is not described in the flowchart, the calculation method is the same as the method described in the above-described embodiment. There is also a case where the correction value is zero.

  Next, it is determined whether or not the correction value obtained in the process 2005 is an appropriate value (process 2006). Whether or not it is an appropriate value is determined by whether or not the resolution of the measured color pattern recorded in the second area 3 is ensured by the colorimetry by paper feeding based on the paper feeding pitch information corrected by the correction value. If it is determined that the value is appropriate, the processing proceeds to processing 2007. If it is not determined to be an appropriate value, an error notification is made (process 2015), and the colorimetric process 1 is terminated.

  In order to measure the color of the second region 3, the recording member 1 needs to be returned to the direction opposite to the paper feeding direction 10 by the paper feeding unit 200. The position to be returned may be returned to the front end 11 of the recording member 1, but is preferably returned to the position of the first position detection pattern 4. A process of a subroutine for confirming the return position of the recording member 1 is a process 2007. A shift amount between the theoretical recording position 61 and the recording position 6 is detected by a process 4002 executed in the process 2007. Based on the result, the paper feeding unit 200 adjusts the position of the recording member 1 so that the colorimetric position and the recording position 6 overlap, that is, the center of the first position detection pattern 4 comes to the colorimetric position ( This process is not shown in the flowchart).

  Next, the paper feed pitch length in the paper feed pitch information is corrected by the correction value calculated by the process 2005 (process 2008). When the first position detection pattern 4 and the measured color pattern in the second region 3 and distance information are included, the paper feed amount is calculated based on the corrected paper feed information (processing 2009). Based on this information, the paper feeding unit 200 feeds the paper so that the leading end of the color measurement pattern reaches the color measurement position (processing 2010). In some cases, the process 2009 and the process 2010 may be omitted. When the processing 2009 and the processing 2010 are omitted, the color measurement is performed without being aware of the position of the color pattern to be measured. In this case, color measurement of the entire region is required between the first position detection pattern 4 and the second position detection pattern 5. Therefore, performing the processing 2009 and the processing 2010 can lead to a reduction in color measurement time.

  A process 2011 is a color measurement process of the color pattern to be measured. After the process 2011, the position of the theoretical recording position 71 is detected by a process 2012, and an error between the theoretical recording position 71 and the recording position 7 is detected again.

  Next, in order to determine whether or not the color measurement pattern in the second region 3 has been appropriately measured, a paper feed error in the color measurement of the color measurement pattern is calculated from the error obtained in the processing 2007 and the processing 2012. (Processing 2013). It is determined whether or not the error obtained in the process 2013 is within an allowable range for appropriately performing the color measurement of the color pattern to be measured (process 2014). If the error is within the allowable range, the color measurement process 1 is terminated. If it is not within the allowable range, an error is notified (process 2015) and the colorimetric process 1 is terminated.

(Ninth embodiment)
The present embodiment is a program of the color measurement process 2 including the color measurement of the color measurement pattern in the second area 3. A flowchart of the color measurement process 2 is shown in FIG. The use of the colorimetric system 100 and the recording member 1 is the same as in the eighth embodiment. In this embodiment, the color measurement pattern is measured without correcting the paper feed pitch information, and whether the color measurement pattern is appropriately measured from the correction value calculated after the color measurement of the color measurement pattern is determined. It is a process to judge. For this reason, since the color measurement of the second position detection pattern is not performed before the color measurement of the color measurement pattern, it is not necessary to return the color measurement position of the recording member 1.

  First, when the recording member 1 is inserted, the paper feeding unit 200 is activated, and the paper feeding of the recording member 1 is started (processing 3000). Color measurement of the first position detection pattern 4 is performed at the theoretical recording position 61 to detect a first error in the paper feed information (processing 3001). In the process 3001, if the first position detection pattern 4 does not exist at the theoretical recording position 61 or if it is in the skew state, a value outside the measurement range is set as the first error. When it is determined from the detected first error whether the first position detection pattern 4 is within an allowable range in which the color measurement of the second region 3 can be appropriately performed (processing 3002), and it is determined that the appropriate color measurement cannot be performed Notifies the error (process 3008), and ends the color measurement process 2.

  If it is determined in the process 3002 that the color measurement of the second area 3 can be appropriately performed, the color measurement of the second area 3 is performed (process 3003), and then the second position detection pattern 5 of the theoretical recording position 71 is determined. Color measurement is performed to detect a second error (processing 3004). In process 3004, if the second position detection pattern 5 does not exist at the theoretical recording position 71, or if it is in the skew state, a different value that is outside the measurement range is set as the second error. .

  Next, it is determined from the detected second error whether or not the position of the second position detection pattern 5 is within an allowable range (processing 3005), and when it is determined that the paper feed amount cannot be measured appropriately. An error is notified (process 3008), and the color measurement process 2 is terminated.

  Next, a paper feed error of the recording member 1 is calculated from the first error and the second error (process 3006), and it is determined whether the paper feed amount is appropriate (process 3007). The color measurement process 2 is terminated, and if not appropriate, the color measurement process 2 is terminated after an error notification (process 3008).

(10th Embodiment)
In the present embodiment, the paper feed pitch information is corrected from the color measurement result of the first position detection pattern 4, and then the color measurement of the second region 3 and the color measurement of the second position detection pattern 5 are performed. A paper feed error in the color measurement of the second area 3 is calculated from the color measurement result of the position detection pattern 4 and the color measurement result of the second position detection pattern 5, and the second area 3 is appropriately determined from the calculated paper feed error. This is a program for colorimetric processing 3 for determining whether or not colorimetry has been completed. A flowchart is shown in FIG. Also in this method, since the color measurement of the second position detection pattern is not performed before the color measurement of the second area 3, it is not necessary to return the color measurement position of the recording member 1.

  First, when the recording member 1 is inserted, the paper feeding unit 200 is activated and the paper feeding of the recording member 1 is started (processing 7000). Color measurement of the first position detection pattern 4 is performed at the theoretical recording position 61 to detect a first error in the paper feed amount (process 7001). In the process 7001, if the first position detection pattern 4 does not exist at the theoretical recording position 61 or if it is in the skew state, a value outside the measurement range is set as the first error. When it is determined from the detected first error whether the first position detection pattern 4 is within an allowable range in which the color measurement of the second region 3 can be appropriately performed (processing 7002), and it is determined that the appropriate color measurement cannot be performed. Notifies the error (process 7009) and terminates the color measurement process 3.

  Next, a correction value for the paper feed pitch information is calculated from the first error detected in the process 7001, and the paper feed pitch information is corrected (process 7003). The corrected paper feed pitch information is referred to as second paper feed pitch information. Processing from processing 7004 to processing 7007 is equivalent to processing 3007 to processing 3007 described above.

  Next, color measurement of the second position detection pattern 5 is performed at the theoretical recording position 71 to detect a second error in the paper feed amount (process 7008), and it is determined that the paper feed amount cannot be measured appropriately. If the error is detected, an error is notified (process 7009), and the color measurement process 3 is terminated.

  Although a plurality of embodiments have been described above, the present invention is not limited to the above-described embodiments as long as the processing contents included in the above-described embodiments are included.

  In the above-described embodiments, the embodiment in which the paper feed pitch information is corrected by the paper feed pitch length has been described. However, the paper feed pitch information may be corrected by the number of paper feed pitches. In this case, the paper feed pitch number between the theoretical recording position 61 and the theoretical recording position 71 differs due to the correction. In any case, by correcting the paper feed pitch information based on the color measurement results of the first position detection pattern and the second position detection pattern, the color measurement pattern in the second region 3 can be appropriately measured. It becomes possible to color.

  DESCRIPTION OF SYMBOLS 1 ... Recording member, 4 ... 1st position detection pattern, 5 ... 2nd position detection pattern, 6 ... Recording position, 7 ... Recording position, 100 ... Colorimetry system, 101 ... Colorimeter, 102 ... Drying fan , 200... Paper feeding section, 301... Recording member, 302... First area, 303.

Claims (12)

A colorimetric device;
Pattern information recorded on a recording member to be fed by a paper feeder;
Paper feed pitch information of the paper feeder;
With
The pattern information is
Position information of a pair of position detection patterns recorded in the first area of the recording member;
Colorimetric information of the pair of position detection patterns;
Including
At the position on the recording member that can be detected from the paper feed pitch information and the position information of the pair of position detection patterns, each of the pair of position detection patterns is subjected to color measurement by the color measurement device,
A color measurement system that detects a paper feed error of the recording member from a result of color measurement by the color measurement device and color measurement information of the pair of position detection patterns. The pattern information includes information on the shape of each of the pair of position detection patterns,
The information of each shape is as follows:
Each of the pair of position detection patterns includes a plurality of unit blocks arranged in a shifted manner;
Each of the plurality of unit blocks is such that adjacent unit blocks are continuous in a direction orthogonal to the paper feed direction,
Among the plurality of unit blocks, a first unit block located at one end is located in the forefront in the paper feed direction, and a second unit block located at the other end is the paper feed. Being in the last row in the direction,
Among the plurality of unit blocks, each of the unit blocks located between the first unit block and the second unit block has a predetermined length than a unit block adjacent to the first unit block side. The recording is shifted backward and shifted forward by the predetermined length from the unit block adjacent to the second unit block.
The colorimetric system according to claim 1, comprising: The pattern information further includes information on a measured color pattern recorded in a second area surrounded by the first area of the recording member,
The position information of the pair of position detection patterns is
One position detection pattern of the pair of position detection patterns is recorded on the front side of the second region in the paper feed direction;
The other one of the pair of position detection patterns is recorded on the rear side of the second region in the paper feed direction;
Including
A first color measurement is performed on the one position detection pattern, a second color measurement is performed on the other position detection pattern,
The paper feed error of the recording member from the color measurement result of each of the plurality of unit blocks in each of the pair of position detection patterns and the paper feed amount of the recording member calculated based on the paper feed pitch information. The colorimetric system according to claim 1, wherein the paper feed pitch information is corrected based on the paper feed error.   The color measurement system according to claim 3, wherein the correction is calculated before color measurement of the color pattern to be measured.   The color measurement system according to claim 3, wherein the correction value is calculated after the first color measurement, the color measurement of the color pattern to be measured, and the second color measurement are continuously performed. . The pattern information further includes information on a color pattern to be measured recorded in a second area surrounded by the first area of the recording member,
The position information of the pair of position detection patterns is
One position detection pattern of the pair of position detection patterns is recorded on the front side of the second area in the paper feed direction;
The other one of the pair of position detection patterns is recorded on the rear side of the second region in the paper feed direction;
Including
First color measurement is performed on the one position detection pattern,
A first paper feed error is detected from the color measurement results of the plurality of unit blocks in the first color measurement and the paper feed pitch information to the point where the recording member performs the first color measurement. ,
Calculating a first correction value for correcting the paper feed pitch information from the first paper feed error;
Second recording color measurement for the color measurement pattern and the other one of the position detection patterns by feeding the recording member with the paper feed pitch information corrected by the first correction value. And
From the distance between each of the pair of position detection patterns obtained from the first color measurement result and the second color measurement result and the corrected paper feed pitch information, the corrected paper feed pitch information is obtained. The color correction system according to claim 1, wherein all second correction values are calculated.   From the color measurement results and the color measurement information of each of the plurality of unit blocks in at least one of the pair of position detection patterns, the recording member is fed in a state oblique to the paper feeding direction. The colorimetry system according to claim 1, wherein the colorimetry system is detected. Furthermore, it has a blower on the near side of the color measuring device in the paper feeding direction,
The colorimetry by the colorimetry device is performed on the areas in the first area and the second area that have been blown by the blower unit. Colorimetric system.   The color measurement system according to claim 1, wherein the color measurement system includes the paper feeder. Pattern information recorded on a recording member to be fed by a paper feeder;
Paper feed pitch information of the paper feeder;
With
The pattern information is
Position information of a pair of position detection patterns recorded in the first area of the recording member;
Colorimetric information of the pair of position detection patterns;
Information on a measured color pattern recorded in a second area surrounded by the first area of the recording member;
Including
The position information of the pair of position detection patterns is
The second region is sandwiched between one position detection pattern of the pair of position detection patterns and the other one of the position detection patterns;
Each of the pair of position detection patterns includes a plurality of unit blocks arranged in a shifted manner,
In each of the pair of position detection patterns, each of the plurality of unit blocks is such that adjacent unit blocks are continuous in a direction orthogonal to the paper feeding direction, and one of the plurality of unit blocks is one of the plurality of unit blocks. The first unit block located at the end of the paper is located in the front row in the paper feed direction, the second unit block located at the other end is located in the last row in the paper feed direction, Each of the unit blocks located between the first unit block and the second unit block is shifted backward by a predetermined length with respect to the unit block adjacent to the first unit block, and the second unit block. The unit block adjacent to the unit block is recorded with a shift ahead of the predetermined length,
Including
At each position of the pair of position detection patterns detected by the paper feeder from paper feed pitch information, each color measurement of the pair of position detection patterns is performed by a color measurement device,
A paper feed error of the recording member is calculated from a color measurement result of the pair of position detection patterns and the color measurement information, and a correction value of the paper feed pitch information is calculated from the paper feed error. , Method for detecting paper feed error in colorimetry system.   The method for detecting a paper feed error of the color measurement system according to claim 10, wherein the first area and the second area are blown before the color measurement is performed by the color measurement device. Pattern information recorded on a recording member to be fed by a paper feeder;
Paper feed pitch information of the paper feeder;
With
The pattern information is
Position information of a pair of position detection patterns recorded in the first area of the recording member;
Colorimetric information of the pair of position detection patterns;
Information on a measured color pattern recorded in a second area surrounded by the first area of the recording member;
Including
The position information of the pair of position detection patterns is
The second region is sandwiched between one position detection pattern of the pair of position detection patterns and the other one of the position detection patterns;
Each of the pair of position detection patterns includes a plurality of unit blocks arranged in a shifted manner;
In each of the pair of position detection patterns, each of the plurality of unit blocks is such that adjacent unit blocks are continuous in a direction orthogonal to the paper feeding direction, and one of the plurality of unit blocks is one of the plurality of unit blocks. The first unit block located at the end of the paper is located in the front row in the paper feed direction, the second unit block located at the other end is located in the last row in the paper feed direction, Each of the unit blocks located between the first unit block and the second unit block is shifted backward by a predetermined length with respect to the unit block adjacent to the first unit block, and the second unit block. The unit block is recorded on the unit block adjacent to the predetermined length ahead of the predetermined length,
A first process for performing color measurement of each of the pair of position detection patterns with a color measurement device at each position of the pair of position detection patterns detected by the paper feeder from the paper feed pitch information;
A second process for calculating a paper feed error of the recording member from the color measurement result in the first process and the color measurement information;
A third process for calculating a correction value of the paper feed pitch information from the paper feed error;
A paper feeding error detection program for a colorimetric system, comprising:

Images