JPS634746B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image scanning device, a so-called scanner device, which photoelectromechanically scans an original image and stores digital image signals in a storage device connected to an electronic computer, plotter, or the like.

Conventional scanner devices have a so-called scanner function that photoelectromechanically scans an original image and obtains an analog image signal through photoelectric conversion, and an image signal processing function and image signal processing function that obtains a desired output image signal from the analog image signal. It consists of a command processing function that instructs the degree and scanning range, and a sequence control function that processes the overall flow of operation.The sequence control processing function operates following input operations of various commands to the command processing function It sequentially scans the original image and outputs electrical image signals. Advances in electronic computers in recent years have been
It has made it possible to acquire continuous large amounts of data such as image data at high speed, and has put into practical use the editing of printed pages and the arrangement of images using electronic computers.

An image data acquisition system using a conventional scanner device is illustrated in FIG. In the figure, numeral 1 represents an ordinary electronic computer, which is equipped with a central processing unit 2, a microbus 3, a storage device 4, a data transmitting/receiving unit 105, etc., and is connected to a scanner device 106 via the data transmitting/receiving unit 105.
Based on various command inputs 107 to the computer 1, image data is collected from the scanner device 106 into the storage area 104b in the storage device 4 of the computer 1.

In an image data acquisition system using a computer as shown in FIG. 1, when a large amount of image data is to be acquired in a short time, a plurality of image data channels consisting of the transmitting/receiving unit 105 and the scanner device 106 shown in FIG. Must be connected. In this case, the number of command input operators required is equal to the number of scanner devices, and as the system expands, operational problems arise due to an increase in the number of operators. Therefore, there is a strong desire for an image data acquisition system that can improve operational efficiency and significantly improve economic efficiency. FIG. 2 shows an example of a configuration that can realize this. In the figure, 1 represents an ordinary electronic computer, which includes a central processing unit 2, a microbus 3, a storage device 4, and a data transmission/reception unit 5.
a, 5b, 5c, 6a, 6b, etc. On the other hand, a scanner device is an image scanning device 7 that minimizes the various command input operation functions required by the operator, which were conventionally provided, and exclusively scans the original image.
A, 7b, 7c and command input devices 8a, 8b, which are used exclusively for various command input operations, are connected to a computer via data transmitting/receiving units 5a, 5b, 5c and 6a, 6b. Command storage area 4 in storage device 4
A stores a plurality of various command data sets from command input devices 8a, 8b, etc., and entrusts their management to software within the computer. On the other hand, the image scanning devices 7a, 7b, 7c, etc., after installing the original image in a predetermined part of the device, obtain various command data sets related to the principle from the computer 1 using verification symbols, and then transmitting the original image to the computer 1. Send digital image data. The computer 1 stores the sent digital image data in an image data storage area 4 in a storage device 4.
A plurality of images are stored in the file ``b'' and managed by software so as to wait for a separately given command to output image data to a plotter device or the like. By realizing such an image data acquisition system, the image scanning devices 7a, 7b, 7c
The command input devices 8a and 8b enable so-called parallel processing, which not only greatly improves the operation of the image scanning device, but also allows command data sets for a large number of image scanning devices to be input using a small number of command input devices. This improves the economic efficiency of the image data acquisition system.

However, even in an image data acquisition system with such a configuration, when using a conventional scanner device with the functional configuration described at the beginning, the time required for inputting various commands to the command processing function of the scanner device is limited. This is comparable to the time required to scan the original image, which is the main function, and reduces the operational efficiency of the image data acquisition system.

Furthermore, when considering an image data acquisition system for the purpose of editing printed pages and arranging manuscripts, image data from an image scanning device must be It is desirable that it does not contain unnecessary data. For this purpose, the image scanning device must control partial reading and scanning of the original image with high precision.

Taking this into consideration, a scanner device that can command the reading range of an original image has been proposed. An example of its configuration is shown in FIG. In the figure, a cylinder 10 to which an original image 9 is mounted is rotated by a synchronous motor 11 to provide main scanning drive in the direction of an arrow 13. cylinder 1
The scanning head 18 placed on the side of the feed screw 1
4, and the arrow 17 is rotated by the rotation of the synchronous motor 15.
A sub-scanning drive is applied to move parallel to the cylinder 10 in the direction of . AC power supplies 12 and 16 control synchronous motors 11 and 15, respectively, and cylinder 10.
and gives uniform rotation to the feed screw 14. The scanning head 18 has a built-in photoelectric conversion element, receives reflected light from a minute area of the original image 9 obtained when the original image 9 is irradiated with a light source (not shown), converts it into an analog image signal, and transmits the signal to the analog image signal processing circuit 22. . The image signal processing circuit 22 generates an image signal 35 by performing waveform processing on the image signal itself, such as emphasizing bright areas or emphasizing dark areas of the original image 9, based on the command 37. AD conversion circuit 2
7 converts the image signal 35 into a digital image signal sequence using a strobe pulse 34 to generate a digital image signal 36 to be input to a computer, plotter, etc. These matters may be means widely used in conventional scanner devices, and detailed explanations will be omitted.

Next, a conventional example of a control method for processing a specific area 9' in the original image 9 will be explained with reference to FIG. Typically, a scanner device is equipped with a main scanning impulse source 19' (a magnet piece, a minute light source, etc.) and a main scanning impulse detector 19 (a magnetic detector, a photoelectric element, etc.) at one point on the circumference of the cylinder 10. A main scanning synchronizing pulse 29 of one pulse per rotation is generated.
In addition, in order to generate a sub-scanning synchronizing pulse 32 indicating the starting point of movement of the scanning head 18, the feed screw 1
A sub-scanning impulse detector 20 and a sub-scanning impulse source 20' are provided at one point along the scanning head 18. Also, it is phase synchronized with the main scanning synchronization pulse 29 and N per rotation of the cylinder 10.
2 equally spaced pulses or sampling clock 2
The distance in the circumferential direction of the cylinder 10 is measured by counting the sampling clock 28. On the other hand, to measure the amount of movement of the scanning head 18, that is, the sub-scanning distance, a pulse encoder 21 is installed on the feed screw 14 to generate K pulses, or encoder pulses 31, per one rotation of the feed screw 14, and these encoder pulses 31 are counted. It is done by doing. A distance measuring origin P0 for main scanning and sub-scanning determined by the installation positions of main-scanning impulse source 19' and sub-scanning impulse detector 20 is illustrated on cylinder 10. This scanner coordinate origin P ₀ is normally used to instruct the scanner device about the reading range 9' in the original image 9, and the main scanning impulse source and the sub-scanning impulse source are used as shown in FIG. 4, which is a developed view of the cylinder 10. Detector installation position P
1. With the scanner coordinate origin P ₀ on the cylinder 10 determined by P2 as the origin of the coordinates, in the main scanning direction 13', the main scanning reading start distance l _1S and the main scanning reading end within the reading range 9' of the original image 9. The distance l _1E , the sub-scanning reading start distance l _2S and the sub-scanning reading end distance l _2E in the sub-scanning direction 17 are measured, and these distance data are commanded to the scanner device. The lengths l ₃ and l ₄ in FIG. 4 are the length and circumference of the cylinder 10. The main scanning reading control circuit 24 shown in FIG. 3 has a counting circuit that is reset by the main scanning synchronizing pulse 29, and counts the number MM of the sampling clock 28, and also calculates the main scanning reading start distance l _1S and the main scanning reading end distance. An arithmetic circuit that converts the sampling clock numbers L ₁ S and L ₁ E corresponding to the distance l _1E , and a comparison circuit and a gate circuit that generate the main scanning gate pulse 30 in which the interval of L ₁ SMML ₁ E is logic 1. Configure. On the other hand, the sub-scanning reading control circuit 25 has the same circuit configuration as the main-scanning reading control circuit 24, and resets the count value with the sub-scanning synchronizing pulse 32, counts the number MS of encoder pulses 31, and scans the sub-scanning reading start distance l. _2S and end distance l _2E are each converted into the number of encoder pulses 31 L ₂ S
and L ₂ E, a sub-scanning gate pulse 33 whose period of L ₂ SMSL ₂ E is logic 1 is generated. Gate 26 gates sampling clock 28 to generate strobe pulse 34 when main scan gate pulse 30 and sub-scan gate pulse 33 are both logic ones.

When a scanner device having the reading range command method described above is applied to an image data acquisition system having the configuration shown in FIG. 2, the variation in the scanner coordinate origin P ₀ shown in FIGS. Therefore, it is not possible to eliminate mechanical adjustment variations among a plurality of scanner devices, and it is not possible to specify the reading range with high precision among the scanner devices.

The present invention provides a scanner device that corrects such variations between the coordinate origins of a plurality of scanners and realizes an image data acquisition system with significantly improved operational efficiency. An embodiment thereof is shown in FIG. .
In the figure, the same parts as in FIG. 3 are given the same reference numerals. As shown in FIG. 5, this scanner device consists of two large blocks: a command input section A that exclusively performs command input, and an image scanning section B that exclusively performs image scanning and image data transmission. The command input section A includes a command information input section 51 composed of a keyboard unit or numeric keypad unit for inputting various command data, a reading range command input section whose details will be described later, and a transmitting/receiving unit 52 for transmitting and receiving these command data. It consists of a data buffer 50 for transmitting data to the image scanning section B. The reading range command input section has a tablet board 44, an input pen 45, and a control unit 46, which constitute a writing point coordinate input device, and measures the coordinates of an arbitrary point on the tablet board 44 from the tablet origin _P0t, and calculates the x coordinate. l _x and y coordinates l _y are given to arithmetic circuits 48 and 49. On the other hand, an original image pasting sheet 42 made of polyester film for pasting the original image 9 has a position alignment hole 47' into which a register pin 47 provided on the tablet 44 is inserted, and a positioning hole 47' for attaching an arbitrary point on the original image pasting sheet 42. A sheet origin P _0c representing coordinates is set. Paste the original picture 9 on the original picture pasting sheet 42 in advance,
The reading range 9' when inserted into the tablet plate 44 has a coordinate relationship as shown in FIG. That is, in FIG. 6, the point P _0t is the tablet origin, and the coordinate values of the sheet origin P _0c of the original picture pasting sheet 42 are l _x0 , l _y0 ,
The coordinate values of the lower left corner P9'S of the reading range 9' are l _xS , l _yS ,
Assume that the coordinate values of the upper right corner P9'E are l _xE and l _yE . When such a positional relationship exists, if P9'S and P9'E are specified with the input pen 45 in FIG.
For the data l _x and _ly , values of l _xS , ly _S and l _xE , _lyE are obtained, respectively. Command coordinate correction value input circuit 48a, 4
9a, the coordinate values l _y0 and l _x0 of the sheet origin P _0c are input to the calculation circuits 48 and 49, respectively, and the calculation circuit 4
By performing the calculations l _y −l _y0 = l _y ′ and l _x −l _x0 = l _x ′ in 8.49, when points P9′S and P9′E are input, the data l _x and l _y are Coordinate values with the sheet origin P _0c as the origin
l′ _xS , l′ _yS and l′ _xE , l′ _yE are transmitted to data buffer 50 . The coordinate correction value input circuits 48a and 49a are composed of digital switches, code converters, and the like, and allow the coordinate values l _x0 and l _y0 of the point P _0c to be set in a semi-fixed manner in advance. In the command input section A having such a configuration, the coordinate value error included in the reading range command is determined by the register pin 47 and the original image pasting sheet 4.
Registration accuracy with the positioning hole 47' of No. 2 and the register pin 47 with respect to the coordinate axis of the tablet plate 44.
Although it _is caused by the parallelism error of
In order to absorb into the coordinate values l _x0 , l _y0 , the data l′ _x , l′ _y
does not appear in Therefore, the errors in the data l' _x and l' _y are only errors due to normal machining accuracy, and variations between devices are eliminated.

On the other hand, the image scanning section B shown in FIG. It has the function of synchronously controlling the system and the function of controlling the connection with the command input part A or the computer, and temporarily stores command data from the command input part A or the computer in the buffer 40 via the transmitting/receiving unit 39. The information is then transmitted to each part of the device. Of the various parts in the image scanning section B, the parts given the same numbers as in FIG. 3 represent the same functions as in the conventional example, and therefore the description thereof will be omitted. Now, in the image scanning section B, the cylinder 10 is equipped with a register pin 41, and all command data including the reading range commands l' _xS , l' _xE , l' _yS , l' _yE are inputted at the command input section A. When the original image pasting sheet 42 to which the original image 9 is pasted is installed, the Sukiyana origin P ₀
and sheet origin P _0c and original image reading range command data
The relationship between l' _xS , l' _xE , l' _yS and l' _yE is as shown in Figure 7, where the x-direction distance between the scanner origin P ₀ and the sheet origin P _0c is l' _x0 , and the y-direction distance is l ′ _y0 , l _1S = l′ _x0
+l′ _xS , l _1E = l′ _x0 + l′ _xE , l _2S = l′ _y0 + l′ _yS and l
_2E = l′ _y0
+l′ _yE . That is, in FIG. 5, among the command data transmitted from the command input section A to the image scanning section B, the command data for controlling main scanning reading is
Command data l' _{yS and} l' _yE are used to control sub-scanning reading using l' _xS and l' The explanation is omitted because it represents a command to control the . _The main scanning _reading command _data l _' It is added to the set l' _x0 and transmitted to the main scanning reading control circuit 24. Similarly, regarding the sub-scanning reading command data l' _yS and l' _yE , the sub-scanning correction calculation circuit 25b calculates the difference between the scanner origin P ₀ and the sheet origin P _0c set in the semi-fixed state by the sub-scanning correction value input circuit 25a. It is added to the sub-scanning direction distance l' _y0 and transmitted to the sub-scanning reading control circuit 25. Correction input circuits 24a, 25a
are both the correction value input circuits 48a and 4 of the command input section A.
The correction calculation circuits 24b and 25b may also have the same configuration as the calculation circuits 48 and 49. According to this method, since the coordinate reading range is always controlled based on the sheet origin P _0c on the original image pasting sheet 42, the scanner origin in the image scanning section B of the plurality of scanner devices
Variations in read range control caused by P ₀ and register pin 41 can be eliminated, providing a significant improvement over conventional methods.

In order to adapt the scanner device having such a configuration to the image data acquisition system shown in FIG.
The image scanning unit B can be realized by connecting the transmitting/receiving unit 39 and the image data output 36 to the transmitting/receiving units 5a, 5b, etc. in FIG. Furthermore, in normal operation of such an image data acquisition system, the original image pasting sheet 42
A plurality of original image pasting sheets 42 are used, a reference code is given to each original image pasting sheet 42, command data is managed for each reference code by computer software, and the original image pasting sheet is also attached to the cylinder 10 in the image scanning section. Further effects can be obtained by inquiring the transmission of command data from the computer using the reference code. Therefore, the normal pasting sheet is 43 in Figure 5.
After entering the verification code and obtaining image data in the image scanning section B, it is preferable to paste another original image again and manage it so that it can be used repeatedly.

Normally, the position alignment hole 47' of the original image pasting sheet 42 and the position mark of the sheet origin P _0c can be made simultaneously using a tool such as a tool to ensure sufficient mechanical accuracy, thereby minimizing intra-lot variation. . Therefore, in operation using a plurality of original picture pasting sheets 42 from the same lot, the correction value input circuits 48a, 49a, 24a and 25 in FIG.
Each correction value to be set in a may be constant and may be changed at the time of changing the lot of the original image pasting sheet 42.

If you want to further correct the positional variation of the sheet origin between multiple lots of original picture pasted sheets or between each original picture pasted sheet, use the correction value input circuit and arithmetic circuit part used in FIG. 5, 48a and 48,
49a and 49, 24a and 24b and 25a and 25
As shown in FIG. 8, a correction value corresponding to the reference code of the original image pasting sheet is stored in advance in the nonvolatile storage devices 55 and 56, and the reference code data of the original image pasting sheet is stored using the address decoder circuit 54. d ₁ as address data of storage devices 55 and 56
d ₂ and the correction value l _x0 in the storage devices 55 and 56
and l _y0 are read out and supplied to arithmetic circuits 48 and 49. These arithmetic circuits 48 and 49 exemplify the above-mentioned command input section A side, and l' _x = l _x - l _x0 and l' _y = l _y - l _y0.
This is the same as the embodiment shown in FIG. 5. For the image scanning unit B, the arithmetic circuit 24 which uses the arithmetic circuits 48 and 49 in FIG. 5 in FIG.
b, 25b, it is possible to perform correction processing for each collation code on the original image pasting sheet. In this case, the collation code data may be transmitted from the command information input section 51 of FIG. 5 on the command input section A side and from the sequence control section 38 on the image scanning section B to the address decoder circuit, respectively. This method can also be applied when performing correction processing for each production lot of the original picture pasting sheet. In that case, a new lot code is prepared in place of the collation code of the original picture pasting sheet mentioned above, and it corresponds to the lot code. It is sufficient to store the correction values in the storage devices 55 and 56 in FIG. 8, and to make the data _d1 correspond to the lot code data.

As described above, the present invention stores the origins of the respective tablets and the reading sections on which the adhesive sheets are provided in the command input means and the image scanning means or the positional errors during machining of the register pins in the respective storage means. By correcting the input origin and the scanner origin using the calculation means during acquisition, variations in the coordinate origins of multiple scanner devices can be corrected.
Moreover, it is possible to achieve a significant improvement in operational efficiency, and its industrial value is great.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration of an image data acquisition electronic computer system using a conventional scanner device.
FIG. 2 is a block diagram showing an example of the configuration of an image data acquisition electronic computer system for using the scanner device according to the present invention, and FIG. 3 is a block diagram showing an example of the configuration of a conventional scanner device that can control the reading range. ,
FIG. 4 is an explanatory diagram for explaining the control of the original image reading range in the scanner device of FIG. 3, FIG. 5 is a block diagram showing an embodiment of the scanner device according to the present invention, and FIG. An explanatory diagram of coordinate input on a pen point input coordinate device for commanding a reading range,
FIG. 7 is an explanatory diagram of the coordinate relationship in image scanning range control of the scanner apparatus according to the present invention, and FIG. 8 is a block diagram showing another embodiment of the origin correction circuit. 1...Electronic computer, 106...Conventional scanner device, 7a...Image scanning device, 8a...Command input device, 9...Original image, 9'...Original image reading range, 10
... Cylinder, 14 ... Feed screw, 18 ... Scanning head, 21 ... Pulse encoder, 23 ... Sampling pulse generator, 24 ... Main scanning reading control circuit, 25 ... Sub-scanning reading control circuit, 26 …
...Gate, 27...AD converter, 36...Digital image signal, P ₀ ...Scanner coordinate origin, 38...
Sequence control section, 39 and 52...Transmission/reception unit, 40 and 50...Buffer, 44...Tablet board, 45...Input pen, _P0t ...Tablet origin, 46...Control unit, 48 and 49...Calculation Circuits, 48a and 49a... Coordinate correction value input circuit, P _0c ... Sheet origin, 54...
Address decoding circuit, 55 and 56... storage device.

Claims (1)

[Claims] 1. In one scanner device that acquires a plurality of image data, a command input that instructs the position of an image to be input with respect to an image on a pasting sheet having a hole that engages with a register pin. The means includes: a tablet having a first origin and a first register pin on which the adhesive sheet is placed that engages with the first register pin; and processing of the first origin or the first register pin. a first storage means that stores at least a positional error at the time; and a pasting sheet from the reading position information of the image to be acquired inputted by an input pen on the tablet and the error information of the first storage means. a first calculating means for calculating reading position information based on the origin above, and an image scanning means for reading the image to be acquired using the reading position information calculated by the first calculating means in the command input means. , a reading unit having a second origin and a second register pin and providing the adhesive sheet that engages with the second register pin; and a position of the second origin and the second register pin during processing. a second storage means that stores at least an error; and reading position information that the scanning head should read from the reading position information calculated by the first calculation means in the command input means and the error information of the second storage means. A scanner device comprising: second calculation means for calculating. 2 The first and second storage means are the first and second storage means, respectively.
The origin of the register pin and the positional error during machining of the register pin are stored, and the correction value for each pasting sheet is also stored and sent as the positional error to the first and second calculation means, respectively. The scanner device according to scope 1.