JPH1153552A - Method and device for checking incorrect collating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for checking incorrect collating with which image data optimum for checking incorrect collating in all frames can be easily fetched even when there is a dispersion in the position of the folding section to a rotary shaft among the respective frames. SOLUTION: A timing signal generating part 4 counts A-phase pulses outputted from an encoder 5 and when Z-phase pulses are outputted, that count value is cleared. When the count value of A-phase pulses matches a previously stored optimum angle value, it is detected as optimum position timing and based on this timing, a light emitting trigger signal LU and a shutter signal SH are generated and respectively outputted to an illumination light source 6 and a TV camera 7. Besides, image data provided by a TV camera 7 are compared with reference image data previously stored in an image processing part 8 and the presence/absence of incorrect collating is judged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inspecting a book or the like for checking whether or not there is a page or not at the time of bookbinding.

[0002]

2. Description of the Related Art Conventionally, at the time of bookbinding, there has been a mis-matching inspection machine which fetches image data of a printed matter to be bound and compares the fetched image data with reference image data stored in advance to check for the presence or absence of a mis-order. is there. In this kind of random inspection machine, a bookbinding machine folds printed materials for a plurality of pieces (a device that draws out the same signature) into signatures, and then applies a single rotation axis to each of the pieces. When a plurality of rotating drums are attached and pulled out from the bookbinding machine at the same time and signatures are gathered at the same time, image data of signatures of each piece is taken in.

[0003]

In general, in a bookbinding machine, when a corresponding signature is pulled out by each of the plurality of rotating drums described above, the position of each signature with respect to the rotation angle of the rotating shaft is determined for each piece. The phenomenon of subtle variations occurs. However, it is very difficult to adjust the timing of capturing image data individually with the conventional incorrect inspection apparatus, and therefore, for all signatures extracted at the same time, image data (for example, inspection It is difficult to capture the most varied characteristic image data in a signature that performs the above.

Further, in the above-described conventional incorrect inspection apparatus, a reference image for inspection is generally generated from a plurality of image data to be taken first. In some cases, only a reference image of an inappropriate portion may be obtained, and when a random inspection is performed using such a reference image, there is a problem that the credibility of the inspection result is significantly reduced.

The present invention has been made in view of such circumstances, and when signatures for a plurality of frames are pulled out by a plurality of rotating drums attached to one rotating shaft, respectively.
Even if the positional relationship between the rotating drum and the signature in each piece varies, it is easy to capture the image data most suitable for the signature inspection in all the pieces, even if the positional relationship between the rotating drum and the signature in each piece varies. It is an object of the present invention to provide a method and an apparatus for inspecting incorrect pages.

[0006]

According to a first aspect of the present invention, a printed matter for a plurality of frames is transferred from a bookbinding machine by a plurality of rotating drums each attached to one rotating shaft. At the same time, the image data of each of the extracted printed materials is extracted, and the extracted image data is compared with the reference image data corresponding to each of the image data to determine whether or not there is a page mismatch. In the random inspection method for inspecting, the rotation angle of the rotation shaft is detected, and in each of the plurality of frames, the detected rotation angle is stored in advance, and when the printed matter is pulled out to a position where image data is to be captured, The image data of the printed matter is taken in based on a timing when the rotation angle of the rotation axis coincides with the rotation angle.

According to a second aspect of the present invention, there is provided the method of inspecting an incorrect page according to the first aspect, wherein the value of the previously stored rotation angle is changed in any one of the plurality of frames, and the value is changed. The image data of the printed matter is captured based on the timing when the changed rotation angle matches the detected rotation angle, and an image based on the captured image data is displayed.

According to a third aspect of the present invention, in the method for inspecting the incorrect pages according to the first aspect, the value of the previously stored rotation angle is changed for each of a desired number of the plurality of frames. The image data of the printed matter is captured based on the timing when the rotation angle whose value has been changed and the detected rotation angle coincide with each other, and an image based on the captured image data is displayed.

According to a fourth aspect of the present invention, there is provided the method of inspecting an incorrect page according to the first aspect, wherein the value of the pre-stored rotation angle is sequentially changed in any one of the plurality of frames. Each time the stored rotation angle is changed, the image data of the printed matter is captured based on the timing at which the changed rotation angle matches the detected rotation angle, and an autocorrelation function of the captured image data is calculated. From among the obtained autocorrelation functions, the rotation angle of the rotation axis when image data having the maximum value of the autocorrelation function is obtained is obtained, and the previously stored rotation angle is calculated by the autocorrelation function. Is replaced with the rotation angle of the rotation axis when image data having the maximum value of the rotation axis is obtained.

According to a fifth aspect of the present invention, in the method for inspecting the incorrect pages according to the first aspect, the value of the previously stored rotation angle is sequentially changed for a desired number of the plurality of frames. Every time the previously stored rotation angle is changed, the image data of the printed matter is fetched based on the timing at which the changed rotation angle matches the detected rotation angle. Obtain a correlation function, among the obtained autocorrelation functions, determine the rotation angle of the rotation axis when the image data with the maximum value of the autocorrelation function is obtained, and calculate the rotation angle stored in advance, It is characterized in that the rotation angle is replaced by the rotation angle of the rotation axis when the image data with the maximum value of the autocorrelation function is obtained.

According to a sixth aspect of the present invention, when a plurality of printed materials are simultaneously pulled out from a bookbinding machine by a plurality of rotating drums each attached to one rotating shaft, image data of each of the pulled out printed materials is obtained. By comparing each of the captured image data with reference image data corresponding to each of the captured image data, a misalignment inspection apparatus for inspecting the presence or absence of a misalignment can detect an angle of rotation of the rotation axis. With the detection means, corresponding to each of the plurality of frames, the rotation angle of the rotating shaft when the printed matter is pulled out to the position from which the image data is to be extracted is stored in advance, and the previously stored rotation angle and A timing for detecting when the rotation angle detected by the angle detecting means coincides with a timing of capturing image data of the printed matter; Detection means, on the basis of the capture timing detected by the image capturing timing detection means, characterized by comprising an image capturing means for capturing an image data of the printed matter.

According to a seventh aspect of the present invention, when a plurality of printed materials are simultaneously pulled out from a bookbinding machine by a plurality of rotating drums attached to one rotating shaft, image data of each of the pulled out printed materials is obtained. In the inspection apparatus for inspecting the presence or absence of a page by comparing each of the captured image data with the reference image data corresponding to each of the image data, each time the rotation axis rotates once, A first pulse signal that is output once and a plurality of pulse signals that are output each time the rotation axis makes one rotation,
A second output is output every time the rotation shaft rotates a predetermined angle.
And a pulse signal generating means for generating a pulse signal of
A numerical value corresponding to the number of the second pulses output between the first pulses, the rotation angle of the rotation axis when the printed matter is pulled out to a position where image data should be captured. Image capture timing detection means for storing a corresponding numerical value in advance as a capture angle value, and detecting a capture timing of image data of the printed matter based on the capture angle value and the first and second pulse signals. And image capturing means for capturing image data of the printed matter based on the capturing timing detected by the image capturing timing detecting means.

According to an eighth aspect of the present invention, in the page inspection apparatus according to the seventh aspect, the image capture timing detection means includes a storage means for storing the reading angle value and a second pulse signal of the second pulse signal. Counting means for counting the number and clearing the count value each time the first pulse signal is output; and when the count value of the counting means matches the capture angle value, the image is displayed. And timing detection means for detecting the timing as the data fetch timing.

According to a ninth aspect of the present invention, in the random inspection apparatus according to the seventh aspect, changing means for changing the capture angle value corresponding to any one of the plurality of pieces. And display means for displaying the image data captured by the image extraction means.

According to a tenth aspect of the present invention, in the inspection apparatus of the seventh aspect, the changing means for changing the take-in angle value corresponding to each of a desired number of the plurality of pieces. And display means for displaying the image data captured by the image capturing means.

According to an eleventh aspect of the present invention, in the random number inspection apparatus according to the seventh aspect, the capture angle value is sequentially changed by a predetermined value corresponding to any one of the plurality of pieces. An auto-correlation function of each image data taken in by the image taking means based on the taking angle value changing means to be made, and the taking angle values sequentially changed by the taking angle value changing means; And a capturing angle value determining means for storing the capturing angle value when the image data having the maximum autocorrelation function is obtained in the image capturing timing detecting means.

According to a twelfth aspect of the present invention, in the random number inspection apparatus according to the seventh aspect, the capture angle value is sequentially changed by a predetermined value for each of a desired number of the plurality of pieces. A capturing angle value changing means to be changed; and an autocorrelation function of each image data extracted by the image extracting means based on the capturing angle values sequentially changed by the capturing angle value changing means. And a capturing angle value determining means for storing the capturing angle value when the image data having the maximum autocorrelation function is obtained in the image capturing timing detecting means.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a diagram showing a schematic configuration of a first embodiment of a random inspection apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a rotary drum of a bookbinding machine, which is fixed to a rotating shaft 2 and stacks a plurality of sheets at a station (not shown) of the bookbinding machine every time the rotating shaft 2 makes one rotation in the direction of arrow A in the figure. The signatures 3 placed and placed are pulled out one copy at a time.

Reference numeral 4 denotes an encoder which outputs an A-phase pulse and a Z-phase pulse in accordance with the rotation of the rotary shaft 2. here,
The A-phase pulse is a pulse that is output k times each time the rotating shaft 2 makes one rotation, that is, the rotating shaft 2 has (360 / k)
One pulse is output for each rotation. One Z-phase pulse is output each time the rotation shaft 2 makes one rotation. In other words, one pulse is output each time one signature 3 is pulled out.

Reference numeral 5 denotes a timing signal generator which outputs a light emission trigger signal LU and a shutter signal SH based on the A-phase pulse and the Z-phase pulse output from the encoder 4 (details will be described later). Reference numeral 6 denotes an illumination light source installed facing the rotary drum 1, which emits light in accordance with the timing of the light emission trigger signal LU output from the timing signal generation unit 5, and which falls within the irradiation area 6a with respect to the extracted signature. Irradiate light.

Reference numeral 7 denotes a TV camera, which captures an image in the range of the image pickup area 7a in accordance with the timing of the shutter signal SH output from the timing signal generator 5, and outputs it as image data. Reference numeral 8 denotes an image processing unit, which compares image data output from the TV camera 7 with reference image data stored in advance for inspection of a broken page based on the timing of the shutter signal SH to determine whether there is a wrong page. I do.

Although not shown, the signature corresponding to N (usually 12 to 36) signatures is provided on the rotating shaft 2 in the axial direction (the direction of arrow B in FIG. 1). And rotating drum 1
The same rotary drums as those described above are installed, and each rotary drum pulls out a corresponding signature one by one from the bookbinding machine. Further, similarly to the rotary drum, the same configuration as the timing signal generator 5, the illumination light source 6, the TV camera 7, and the image processor 8 shown in FIG. An A-phase pulse and a Z-phase pulse output from the encoder 4 (only one encoder 4 is provided for one rotary shaft 2) are supplied to each timing signal generator in parallel. Further, a series of components closest to the encoder 4 (a rotary drum, a timing signal generator,
The illumination light source, the TV camera, and the image processing unit) are defined as the first frame, and thereafter, the second frame, the third frame,.
.., An N-th frame is provided.

Next, the operation of the page inspection apparatus according to the first embodiment will be described with reference to FIG. FIG. 2 shows an image data (for example, an image data of a characteristic portion which is most varied in the signature) in a process of extracting the signature in each piece in the above-described configuration in the process of extracting the signature. 4 is a timing chart showing the relationship between the timing at which the position () is obtained (hereinafter referred to as the optimal position timing) and the A-phase pulse and the Z-phase pulse output from the encoder 4. In this figure, (a)
Shows the optimal position timing of the signature of the first frame. Similarly, (b) shows the optimal position timing of the signature of the second frame, and (c) shows the optimal position timing of the signature of the Nth frame.

FIG. 2A shows that the optimal position timing of the signature of the first frame is the a-th (0 ≦ a) after the Z-phase pulse is output.
2 (b). Similarly, FIG. 2B shows the b-th pulse (0 ≦ b ≦ k−1) after the output of the Z-phase pulse. 2 (c) indicates that the A-phase pulse output at the integer position becomes the optimal position timing of the signature of the second frame, and FIG.
It is shown that the A-phase pulse output at the th (an integer of 0 ≦ c ≦ k−1) is the optimal position timing of the signature of the Nth frame.

Here, the values of a, b, and c correspond to the rotation angle from the reference angle when the angle of the rotating shaft 2 at the time when the Z-phase pulse is output is set as the reference angle. Value, and as mentioned above,
The number of A-phase pulses output after the output of the Z-phase pulse is a,
When the values of b and c are reached, the signature of each piece is pulled out to the optimum position. Therefore, the values of a, b and c are hereinafter referred to as optimum angle values. These optimum angle values are values obtained in advance by a test or the like. When these values are 0, the angle of the rotating shaft 2 when the Z-phase pulse is output (that is, the above-described reference angle) ).

The timing signal generator in this embodiment detects the rotation angle of the rotating shaft 2 based on the A-phase and Z-phase pulses output from the encoder 4 according to the rotating angle of the rotating shaft 2, and The time when the detected rotation angle matches the previously stored optimum angle value is detected as the optimum position timing. Then, based on the optimum position timing, the time from when the TV camera 7 receives the shutter signal SH to when the shutter is opened, the rotation speed of the rotating drum, and the like, the respective light emission trigger signals LU and the shutter signal SH are generated. , Output.

As a method of detecting the optimum position timing, for example, every time an A-phase pulse is output to the timing signal generator 5, the pulse is counted, and when the Z-phase is output, the count value is cleared. A counter is provided, and when the count value becomes an optimum angle value stored in advance in each timing signal generation unit 5 (for example, FIG.
In the case of the first frame shown in (1), when the count value becomes a),
One that detects the optimal position timing is conceivable.

As described above, according to the first embodiment, the timing signal generator provided for each frame detects the optimum position timing, and based on this, the light emission trigger signal LU, Since the shutter signal SH is generated and output, even if the positions of the signatures of all the frames for N frames are different from each other, it is possible to capture the image of the signature position that is optimal for the inspection of all the frames.

[Second Embodiment] In the second embodiment, in the configuration of the first embodiment described above, the optimal angle value for each frame is changed so that the position of the signature at the time of capturing the image data is set to the optimal position. 2 shows a configuration that can be easily adjusted.

In FIG. 3, portions corresponding to the respective components in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. FIG.
Is different from the configuration of FIG. 1 in that the configuration of the first frame is as follows: (i) In addition to the function of the timing signal generator 5, an optimal angle value preset therein is arbitrarily set (however, (Settable range is an integer of 0 or more and k-1 or less) a timing signal generating unit 9 capable of (ii)
(Iii) The image processing unit 10 displays an image based on the image data output from the TV camera 7 on the monitor 11 in addition to the function of the image processing unit 8.

The procedure for detecting the optimal position timing of each piece in the signature using the configuration shown in FIG. 3 will be described below with reference to FIG.
This will be described with reference to FIG. Here, FIG. 4 is a timing chart showing the relationship between the A-phase and Z-phase pulses output from the encoder 4 and the optimal position timing detected in the timing signal generator 9 in FIG.

FIG. 5 is a diagram showing the relationship between the position of the imaging area 7a with respect to the signature 3 pulled out by the rotating drum 1 and the timing at which individual A-phase pulses are output. The arrows shown are the rotating drum 1
2 shows the direction of travel of the signature 3 extracted by the method.

First, the initial value of the optimal angle value preset in the timing signal generator 9 is X2 (0 ≦ X2 ≦ k−
If the value is (an integer of 1), the timing signal generator 9 detects the A-phase pulse (A-phase pulse output at the X2th position after the output of the Z-phase pulse) in FIG. 4 as the optimal position timing, Based on this, the light emission trigger signal L
U and a shutter signal SH are output to the illumination light source 6 and the TV camera 7. At this time, an image of the signature 3 in the image pickup area 7a is displayed on the monitor 11 in FIG.

Then, from this state, the user reduces the optimal angle value of the timing signal generator 5 to, for example, X
If it is 1, the A-phase pulse in FIG. 4 is detected as the optimal position timing, and based on this, the light emission trigger signal LU and the shutter signal SH are output to the illumination light source 6 and the TV camera 7. Assuming that the positional relationship between the imaging region 7a and the signature 3 at this time is as shown in FIG. 5A, the monitor 11 displays the signature 3 in the imaging region 7a in FIG. Is displayed.

When the user increases the optimum angle value set in the timing signal generator 9 from the state shown in FIG. 5B to, for example, X3, A shown in FIG.
The phase pulse is detected as the optimum position timing, and based on this, the light emission trigger signal LU and the shutter signal SH
Is output to the illumination light source 6 and the TV camera 7. At this time, the monitor 11 displays the image pickup area 7 in FIG.
The image of the signature 3 in a is displayed.

As described above, when the optimum angle value set in the timing signal generator is increased, the image pickup area 7a and the signature 3
Moves from FIG. 5 (a) to FIG. 5 (d),
When the optimum angle value is reduced, the reverse of FIG.
It shifts to (a). Thus, the user can change the optimum angle value set in the timing signal generator 9 as appropriate while watching the image displayed on the monitor 11, so that the user is most suitable for inspecting the signature 3 on the signature 3. An optimum angle value that can obtain an image of a part (for example, a part having the most salient features in a signature) is searched for.

As described above, in the second embodiment, the optimum angle value set in the timing signal generator 9 can be arbitrarily set, and the monitor 11 for displaying an image captured by the TV camera 7 is used. With the provision, the user can easily determine the timing for obtaining an image most suitable for the incorrect inspection.

The timing signal generator 9, the image processor 10, and the monitor 11 shown in FIG. 3 are provided for other frames (not shown). The timing for obtaining the image most suitable for the incorrect inspection may be determined.

[Third Embodiment] In the configuration of the second embodiment described above, the user adjusts the optimum angle value of the signature of each piece in the signature to determine the timing for obtaining the image most suitable for the incorrect inspection. However, in the third embodiment, a configuration of a random inspection apparatus that automatically detects the optimum angle value is shown.

The configuration of the third embodiment differs from the configuration of FIG. 1 in the following points. (i) The timing signal generator itself increments the optimum angle value by one from 0 to k-1 sequentially at predetermined time intervals, and adjusts the optimum position value to the optimum position timing detected at each optimum angle value. Output the light emission trigger signal LU and the shutter signal SH based on the

(Ii) While the timing signal generating section is performing the above operation, the image processing section obtains an autocorrelation function for each image data output from the TV camera 7, and the optimum angle value is 0 to k. After changing all the way to -1,
The point that the optimal angle value when the image data having the largest autocorrelation function is obtained is set in the timing signal generator.

With the above-described configuration, a period from when a certain Z-phase pulse is output to when the next Z-phase pulse is output,
Each image data is photographed by the TV camera 7 in accordance with the timing of each A-phase pulse, and an autocorrelation function is obtained for each photographed image data. Then, of these autocorrelation functions, the A-phase pulse output when image data indicating the maximum value is obtained is detected after the Z-phase pulse is output, and the order of the output is detected. Is set in the timing signal generator.

Such a configuration is used for all (or a part) of N frames.
The optimum angle value at which the image data when the autocorrelation function is maximized (that is, the image data of the characteristic portion of the signature with the most changes) is automatically calculated for each frame. Is detected and set in the timing generator. Therefore, according to the present embodiment, the optimum angle value determined by the user in the second embodiment can be automatically detected and set.

In the above-described configuration, the optimum angle value is incremented by one from 0 to k-1 in the timing signal generator, but the method of changing the optimum angle value is not limited to this. is not. That is, for example, after incrementing by one from 0 to k-1 and then decrementing one by one from k-1 to 0, the image data obtained at the timing of each A-phase pulse The average value of the autocorrelation function may be obtained, and the timing at which the maximum average value among the average values of the autocorrelation functions is obtained may be adopted as the optimum angle value.

While increasing the optimal angle value from 0 to k−1, image data is acquired at the timing of even-numbered A-phase pulses including 0, and then optimally changed from k−1 to 0. While decreasing the angle value, image data is acquired at the timing of the odd-numbered A-phase pulse, an autocorrelation function is obtained for each acquired image data, and the optimum angle value is determined based on the autocorrelation function. It may be.

Further, the above-described method of detecting the optimum angle value is sequentially performed on the first to Nth frames, and the obtained optimum angle value of each frame is set in each timing signal generator. May be provided independently.

[0047]

As described above, according to the present invention,
When a plurality of printed materials are simultaneously pulled out of the bookbinding machine by a plurality of rotating drums attached to one rotating shaft, image data of each of the drawn printed materials is extracted, and each of the extracted image data and A method for inspecting the presence or absence of a page mismatch by comparing each of the image data with reference image data respectively corresponding to each of the image data, detecting the rotation angle of the rotation shaft, and detecting the rotation angle of each of the plurality of frames. The image data of the printed matter is extracted based on the timing at which the rotation angle coincides with the rotation angle of the rotation axis when the printed matter is pulled out to the position where the image data stored in advance is to be extracted. Even if the position of each signature with respect to the rotation angle of all the pieces varies, it is possible to capture the image of the optimal signature position for inspection of all the pieces in all pieces. That.

Further, the value of the previously stored rotation angle is changed, and the image of the printed matter is determined based on the timing when the changed rotation angle and the detected rotation angle of the rotation axis coincide with each other. Since the data is extracted and an image based on the extracted image data is displayed, the image of the desired portion on the printed matter can be obtained by creating the value of the previously stored rotation angle while viewing the displayed image. Data can be easily captured. Therefore, it is possible to easily obtain a reference image that is most suitable for the irregular inspection.

Further, according to the present invention, the value of the rotation angle stored in advance is sequentially changed, and each time the rotation angle is changed, the changed rotation angle and the detected rotation of the rotation shaft are changed. Based on the timing at which the angle matches, the image data of the printed matter is extracted, the autocorrelation function of each of the extracted image data is obtained, and the image data having the maximum value of the autocorrelation function is obtained. The rotation angle of the rotating shaft at the time of obtaining is obtained, and the previously stored rotation angle is replaced with the rotation angle of the rotating shaft at the time when the image data with the maximum value of the autocorrelation function is obtained. It is possible to automatically detect an angle value at which image data of a characteristic portion with various changes can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a schematic configuration of a page inspection apparatus according to a first embodiment of the present invention.

FIG. 2 is a timing chart showing a relationship between A-phase and Z-phase pulses and an optimal position timing of a signature in each frame in the random inspection apparatus.

FIG. 3 is an explanatory diagram illustrating a schematic configuration of a page inspection apparatus according to a second embodiment of the present invention.

FIG. 4 is a timing chart showing a relationship between A-phase and Z-phase pulses and an optimum position timing based on an initial optimum angle value in the random inspection apparatus.

FIG. 5 is an explanatory diagram for explaining each optimal position timing in FIG. 4 and a positional relationship of a signature with respect to an imaging region.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotating drum 2 rotating shaft 3 signature 4 encoder 5, 9 timing signal generator 6 illumination light source 6 a irradiation area 7 TV camera 7 a imaging area 8, 10 image processing section 11 monitor

Continuing from the front page (72) Inventor Hiroshi Kojima 1-5-1, Taito, Taito-ku, Tokyo Inside Toppan Printing Co., Ltd. (72) Inventor Toshihiro Hachiya 2-3-13 Kyobashi, Chuo-ku, Tokyo Toyo Ink Manufacturing Inside the corporation

Claims (12)

[Claims] When a plurality of printed materials are simultaneously pulled out from a bookbinding machine by a plurality of rotating drums attached to one rotating shaft, image data of each of the drawn printed materials is extracted. By comparing each image data and the reference image data respectively corresponding to the respective image data, in a misalignment inspection method for inspecting the presence or absence of a misalignment, the rotation angle of the rotation axis is detected, In each case, based on the timing when the detected rotation angle matches the rotation angle of the rotating shaft when the printed matter is pulled out to the position where the image data is to be captured, the image data of the printed matter is stored in advance. Incorrect inspection method characterized by taking in. 2. A timing when a value of the previously stored rotation angle is changed in any one of the plurality of frames, and the detected rotation angle coincides with the changed rotation angle. 2. The method according to claim 1, wherein image data of the printed matter is captured based on the image data, and an image based on the captured image data is displayed. 3. The method according to claim 1, wherein the predetermined number of frames of the plurality of frames change the value of the rotation angle stored in advance.
The rotation angle whose value has been changed and the detected rotation angle are:
2. The method according to claim 1, wherein image data of the printed matter is fetched based on the timing of the coincidence, and an image based on the fetched image data is displayed. 4. In any one of the plurality of frames, the value of the previously stored rotation angle is sequentially changed, and each time the previously stored rotation angle is changed, the changed rotation angle and The image data of the printed matter is captured based on the timing at which the detected rotation angle matches, and the autocorrelation function of each captured image data is determined.
Among the obtained autocorrelation functions, the rotation angle of the rotation axis when image data in which the value of the autocorrelation function is maximized is obtained, and the previously stored rotation angle is calculated as the value of the autocorrelation function. 2. The method according to claim 1, wherein the rotation angle of the rotating shaft at the time when the image data having the maximum value is obtained is replaced. 5. The method according to claim 5, wherein, in a desired number of frames of the plurality of frames, the value of the previously stored rotation angle is sequentially changed, and each time the previously stored rotation angle is changed, the changed rotation angle is changed. Based on the timing at which the angle and the detected rotation angle match, the image data of the printed matter is captured, and the autocorrelation function of each captured image data is determined. The rotation angle of the rotation axis when the image data with the maximum value is obtained is obtained, and the rotation angle stored in advance is obtained when the image data with the maximum value of the autocorrelation function is obtained. 2. The method according to claim 1, wherein the rotation angle is replaced by a rotation angle of the rotation shaft. 6. When a plurality of printed materials are simultaneously pulled out from a bookbinding machine by a plurality of rotating drums attached to one rotating shaft, image data of each of the pulled out printed materials is taken in. By comparing the image data and the reference image data corresponding to each of the image data with each other, a misalignment inspection apparatus that inspects for the presence or absence of a misalignment includes an angle detection unit that detects a rotation angle of the rotation shaft, For each of the plurality of frames, a rotation angle of the rotation shaft when the printed matter is pulled out to a position where image data is to be extracted is stored in advance, and the rotation angle stored in advance and detected by the angle detection means. Capture timing detection means for detecting when the rotation angle coincides with the input rotation angle as capture timing of image data of the printed matter; Based on the capture timing detected by the write timing detecting means, erratic pagination inspection apparatus characterized by comprising an image capturing means for capturing an image data of the printed matter. 7. When simultaneously extracting a plurality of printed materials from a bookbinding machine by a plurality of rotating drums attached to one rotating shaft, image data of each of the extracted printed materials is taken in and taken in. In the apparatus for inspecting the presence or absence of a page by comparing each image data with the reference image data corresponding to the respective image data, a first output is output each time the rotation axis rotates once. And a second pulse signal, which is a plurality of pulse signals output each time the rotation axis makes one rotation, and is output once each time the rotation axis rotates by a predetermined angle. A signal generating means, and a numerical value corresponding to the number of the second pulses output between two consecutive first pulses corresponding to each of the plurality of frames; A value corresponding to the rotation angle of the rotating shaft when the printed material is pulled out to a position where the data is to be captured is stored in advance as a capture angle value, and the capture angle value and the first and second pulses are stored. Image capture timing detection means for detecting the timing of capturing the image data of the printed matter based on the signal, and an image capturing the image data of the printed matter based on the capture timing detected by the image capture timing detection means An incorrect page inspection apparatus comprising: a capturing unit. 8. The image capture timing detection means, wherein: a storage means for storing the capture angle value; a number of the second pulse signals;
Counting means for clearing the count value each time a pulse signal is output; and timing detection for detecting when the count value of the counting means matches the capture angle value as the capture timing of the image data. 8. The apparatus according to claim 7, comprising: 9. A change unit for changing the capture angle value corresponding to any one of the plurality of frames, and a display unit for displaying image data captured by the image extraction unit. The inspection apparatus according to claim 7, wherein the inspection apparatus is provided. 10. A change means for changing the capture angle value corresponding to each of a desired number of the frames among the plurality of pieces, and a display for displaying image data captured by the image capture means. 8. The apparatus according to claim 7, further comprising means. 11. A capture angle value changing means for sequentially changing the capture angle value by a predetermined value corresponding to any one of the plurality of pieces, and a capture angle value change means for sequentially changing the capture angle value. An autocorrelation function of each image data captured by the image capturing means is obtained based on the changed capture angle value, and the image data obtained when the obtained autocorrelation function has the maximum value is obtained. 8. An image capturing angle value determining means for storing an image capturing angle value in said image capturing timing detecting means.
Inspection device according to 1. 12. A capturing angle value changing means for sequentially changing the capturing angle value by a predetermined value corresponding to each of a desired number of the frames among the plurality of pieces, and a capturing angle value changing means. An autocorrelation function of each image data extracted by the image extracting means is obtained based on the sequentially changed capture angle value, and an image data at which the obtained autocorrelation function has a maximum value is obtained. 8. The apparatus according to claim 7, further comprising a capturing angle value determining unit that stores the capturing angle value in the image capturing timing detecting unit.