JP3803178B2 - Image forming system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in an image forming system that reads a document image and forms an image based on the read image data.
[0002]
[Prior art]
With the widespread use of personal computers (hereinafter abbreviated as personal computers), the number of originals copied by copiers is increasing on the memory or network in personal computers. Under such circumstances, it is also a fact that opportunities for information transmission by electronic information such as electronic mail are increasing. On the other hand, there are still many opportunities for transmitting information by paper, and along with this, the opportunities for copying have increased.
[0003]
However, a document copied on the basis of a document output on paper cannot avoid image quality deterioration. In particular, since color images include a mixture of halftone images and character images having different properties due to recording characteristics, it is difficult to faithfully reproduce these halftone images and character images.
[0004]
In JP-A-8-331362, for the purpose of preventing such image quality deterioration, an image area identification signal for identifying an image area having different properties in terms of recording characteristics is added to a copy image in a state where it is difficult to visually identify the image area. A method has been proposed in which image quality deterioration is reduced by the image area identification signal. However, even with this method, deterioration of the quality of the color image is still inevitable. In particular, if the copying is repeated twice or three times, the image quality is greatly deteriorated.
[0005]
Further, in JP-A-8-331362, image data read from a document image to be copied is stored in a file server or the like with a predetermined file name (for example, a document identification number), and formed based on the read image data. There has been proposed a method of adding a document identification number to an image in a state where it is difficult to visually identify the document identification number. That is, when the document to be copied is a document to which a document identification number is added, the document identification number added to the document is read, and the document identification number corresponding to this document identification number is read. Image data is read, and an image is formed based on the read image data. According to this method, image quality deterioration is substantially eliminated in copying based on a document to which a document identification number is added. However, the problem of image quality deterioration at the stage of adding the document identification number (first stage) still remains.
[0006]
Further, Japanese Patent Laid-Open No. 8-331362 proposes a method of embedding text data or description language data in a copy, and developing image data faithfully by developing the image data based on the embedded information. However, since the text data or the description language data has a considerable amount of information, it is difficult to add the text data or the description language data in a state where it is difficult to visually identify. A two-dimensional bar code is known as a large amount of information to be recorded. However, an unnatural pattern appears on a manuscript with a two-dimensional bar code and cannot be used as a formal document. Moreover, the problem of image quality deterioration at the stage of adding text data or description language data (first stage) still remains.
[0007]
Japanese Patent Application Laid-Open No. 7-28928 proposes a method for recording information on a document image on a document using a recording method using light absorption characteristics in a wavelength region other than the visible light region. However, a special recording device for recording information by such a recording method and a special reading device for reading information recorded by such a recording method are necessary, which causes inconvenience in terms of cost. was there. Moreover, the problem of image quality deterioration at the initial stage still remains.
[0008]
Japanese Patent Application Laid-Open No. 7-30696 proposes an image information loading device in which digital information is encoded and embedded in image data. That is, easy-to-read code information similar to a barcode is recorded on the same sheet, and an image is output by superimposing it with image information based on this code information. Also, as a similar device, there is also known an apparatus that records such code information on the first page of a document, reads the first page, obtains the original image data from the image file data, and prints it out. Yes. In this device, code information is recorded in a visible state, and cannot be used as a formal document. In addition to the original document, a special document in which code information is recorded is required, the management becomes complicated, and the usability is not good.
[0009]
In addition, since code information can be added by hand, there is an advantage that control other than normal copying is possible, but there is also a possibility of misuse. Therefore, in actual operation, for example, the inconvenience that the same copy as the original overflows contrary to the intention of the manuscript creator.
[0010]
Even if information is digitized, there are still many opportunities to circulate documents. In this case, information such as a check indicating that the circulation has been completed, an approval mark, or a signature may be added to the circulation document. When copying such a circulation document, the original circulation document may be copied, but a copy of the circulation document with additional information may be required. The conventional example as described above has a problem that such a request cannot be answered.
[0011]
[Problems to be solved by the invention]
As described above, the conventional copying machine has a problem that it is impossible to reproduce a document having the same image quality as the original document (which is not inferior to that of the original document) with ease of copying. In particular, this problem becomes prominent when the original document is in color.
[0012]
In addition, the conventional copying machine has a problem that it is not possible to prevent flooding of originals having an image quality close to that of an original original against the will of the original supplier.
In addition, even if a conventional copying machine can reproduce a document having an image quality close to that of the original document, it is difficult to reproduce a document having an image quality close to that of the original document including the added information when some information is added to the original document. Met.
[0013]
Further, in the conventional copying machine, when the original circulation document is digitized and stored, the original circulation document and the circulation document to which additional information is added cannot be associated and managed. It was.
[0014]
SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming system described below in view of the above-described circumstances.
(1) An image forming system capable of obtaining a document that is substantially the same as the original document with ease of copying.
[0015]
(2) An image forming system capable of preventing overflow of a document that is substantially identical to the original document, contrary to the will of the original document creator.
(3) An image forming system capable of obtaining a document that is substantially the same as the original document and that reflects information added to the original document.
[0016]
(4) An image forming system capable of managing an original circulation document in association with the circulation document to which additional information is added when the original circulation document is stored in an electronic form.
[0017]
[Means for Solving the Problems]
In order to solve the above problems and achieve the object, an image forming system of the present invention is configured as follows.
(1) An image forming system according to the present invention adds a file storage unit for storing a file and access information for accessing the file stored in the file storage unit, and an image formed based on the file. First image output means for output, reading means for optically reading the image output by the first image output means and outputting image data, and access from among the image data output from the read means An extraction means for extracting information, and a second image output for reading out a file stored in the file storage means based on the access information extracted by the extraction means and outputting an image formed based on the file Means.
[0018]
(2) An image forming system according to the present invention includes a file storage unit for storing a file, address information indicating a file storage location for accessing the file stored in the file storage unit, and a file name indicating a file name Information and access information including password information indicating a password are added, and a first image output means for outputting an image formed based on the file, and an image output by the first image output means is optically Reading means for automatically reading and outputting image data, extracting means for extracting access information from the image data output from the reading means, and storing the file based on the access information extracted by the extracting means A second image output means for reading a file stored in the means and outputting an image formed based on the file; An identification information registration means for accepting registration of the identification information and registering the accepted identification information, an identification information input acceptance means for accepting input of the identification information, and a password included in the access information extracted by the extraction means The image quality deterioration degree of the information is evaluated, and the determination based on the result of the evaluation permits the reading of the file stored in the file storage means, and the identification information registered in the identification information registration means, and the identification Only when the identification information received by the information input receiving means matches, the control means for executing the output of the image by the previous second image forming means.
[0019]
(3) An image forming system of the present invention adds a file storage means for storing a file and access information for accessing the file stored in the file storage means, and an image formed based on the file is added. First image output means for outputting, reading means for optically reading the image output by the first image output means and outputting image data, and image for storing image data output from the reading means Data storage means, extraction means for extracting access information from the image data stored in the image data storage means, and the file storage means based on the access information extracted by the extraction means A file is read, and image data formed based on the file is stored on the image data stored in the image data storage means. It was written, and a second image output means for outputting an image formed based on image data obtained as a result of the overwriting.
[0020]
(4) An image forming system according to the present invention adds a file storage means for storing a file and access information for accessing the file stored in the file storage means, and an image formed based on the file is added. First image output means for outputting, reading means for optically reading the image output by the first image output means and outputting image data, and image for storing image data output from the reading means Data storage means, extraction means for extracting access information from the image data stored in the image data storage means, and the file storage means based on the access information extracted by the extraction means A file is read, and image data formed based on the file is stored on the image data stored in the image data storage means. Second image output means for outputting an image formed on the basis of image data obtained as a result of overwriting and overwriting, image data stored in the image data storage means, and extracted from the image data Control means is provided for comparing image data formed based on a file read based on access information and storing image data corresponding to the difference between the two image data in association with the file.
[0021]
As a result of taking the above-mentioned means, the following operation occurs.
(1) According to the image forming system of the present invention, a document that is substantially the same as the original document output by the first image output unit is output by the second image output unit. That is, based on the original document, a document substantially identical to the original document can be obtained.
[0022]
(2) According to the image forming system of the present invention, an image is output by the second image forming apparatus only when predetermined conditions (extracted password image quality degradation degree, ID match, etc.) are satisfied. The This ensures security in the image forming process based on the file.
[0023]
(3) According to the image forming system of the present invention, a document that is substantially the same as the original document output from the first image output means and that reflects the information added to the original document is provided. And output from the second image output means. That is, based on the original document with the information added, a document that is substantially the same as the original document and that reflects the information added to the original document is obtained.
(4) According to the image forming system of the present invention, the original document and the information added to the original document are managed in association with each other.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing a schematic configuration of an image forming apparatus according to an embodiment of the present invention. This image forming apparatus has a copying function as a copying machine and a printer function as a printer.
[0025]
As shown in FIG. 1, the image forming apparatus includes a scanner unit 1 as a reading unit and a printer unit 2 as an image forming unit.
A scanner unit 1 that reads an image of a document has a document table cover 3 at the top thereof, and is opposed to the document table cover 3 in a closed state, and has a document table 4 made of transparent glass on which a document D is set. is doing. Below the document table 4, an exposure lamp 5 for illuminating the document D placed on the document table 4, a reflector 6 for condensing the light from the exposure lamp 5 on the document D, and reflected light from the document D A first mirror 7 or the like that is bent in the left direction in FIG. The exposure lamp 5, the reflector 6, and the first mirror 7 are fixed to the first carriage 8. The first carriage 8 is connected to a pulse motor (not shown) via a toothed belt (not shown) and the like, and the driving force of the pulse motor is transmitted to move in parallel along the document table 4.
[0026]
The left side of the drawing with respect to the first carriage 8, that is, the direction in which the reflected light reflected by the first mirror 7 is guided, is parallel to the document table 4 via a driving mechanism (not shown) such as a toothed belt and a DC motor. A second carriage 9 is provided so as to be movable. The second carriage 9 includes a second mirror 11 that folds the reflected light from the document D guided by the first mirror 7 downward, and a third mirror that folds the reflected light from the second mirror 11 to the right in the drawing. 12 are arranged at right angles to each other. The second carriage 9 is driven by the first carriage 8 and is moved in parallel along the document table 4 at a speed ½ with respect to the first carriage 8.
[0027]
An imaging lens 13 that forms an image of the reflected light from the second carriage 9 at a predetermined magnification is disposed in a plane including the optical axis of the light reflected through the second carriage 9. A CCD image sensor (photoelectric conversion element) 15 for converting the reflected light, which is focused by the imaging lens 13, into an electric signal, that is, image data, is arranged in a plane substantially orthogonal to the optical axis of the light that has passed. Yes.
[0028]
Thus, when the light from the exposure lamp 5 is condensed on the document D on the document table 4 by the reflector 6, the reflected light from the document D is converted into the first mirror 7, the second mirror 11, the third mirror 12, and The light enters the CCD image sensor 15 through the imaging lens 13 and is converted into image data here.
[0029]
The printer unit 2 is a color-separated image for each color component based on a well-known subtractive color mixing method, that is, yellow (yellow, hereinafter referred to as y), magenta (a type of red, hereinafter referred to as m), It has first to fourth image forming units 10y, 10m, 10c, and 10k that respectively form images of four colors of cyan (bluish purple, hereinafter referred to as c) and black (black, hereinafter referred to as k). is doing.
[0030]
Below each of the image forming units 10y, 10m, 10c, and 10k, a conveyance mechanism 20 including a conveyance belt 21 that conveys an image of each color formed by each image formation unit in the direction of arrow a in the drawing is disposed. Yes. The conveyor belt 21 is wound and stretched between a driving roller 91 that is rotated in the direction of arrow a by a belt motor (not shown) and a driven roller 92 that is spaced a predetermined distance from the driving roller 91, and is constant in the direction of arrow a. Travel endlessly at speed. The image forming units 10y, 10m, 10c, and 10k are arranged in series along the conveyance direction of the conveyance belt 21.
[0031]
Each of the image forming units 10y, 10m, 10c, and 10k is a photosensitive drum 61y, 61m, 61c, and 61k as an image carrier whose outer peripheral surface is formed to be rotatable in the same direction at a position in contact with the conveyance belt 21. Is included. A drum motor (not shown) for rotating each photosensitive drum at a predetermined peripheral speed is connected to each photosensitive drum.
[0032]
The axes of the respective photoconductive drums 61y, 61m, 61c, and 61k are arranged so as to be orthogonal to the direction in which the image is conveyed by the conveyance belt 21, and the axes of the respective photoconductive drums are arranged at equal intervals. In the following description, the axial direction of each photosensitive drum is defined as a main scanning direction (second direction), and the direction in which the photosensitive drum is rotated, that is, the rotation direction of the conveying belt 21 (the direction of arrow a in the figure). The sub-scanning direction (first direction) is assumed.
[0033]
Around each of the photosensitive drums 61y, 61m, 61c, 61k, charging devices 62y, 62m, 62c, 62k extending in the main scanning direction, static eliminating devices 63y, 63m, 63c, 63k, similarly in the main scanning direction. Developing roller 64y, 64m, 64c, 64k extended, lower stirring roller 67y, 67m, 67c, 67k, upper stirring roller 68y, 68m, 68c, 68k, transfer device 93y extended in the main scanning direction in the same manner 93m, 93c, 93k, cleaning blades 65y, 65m, 65c, 65k similarly extended in the main scanning direction, and waste toner collection screws 66y, 66m, 66c, 66k, respectively, rotate in the corresponding photosensitive drum. Are arranged in order.
[0034]
Each transfer device is disposed at a position where the conveyance belt 21 is sandwiched between the transfer drums, that is, inside the conveyance belt 21. Further, exposure points by an exposure device described later are formed on the outer peripheral surface of the photosensitive drum between the charging device and the developing roller, respectively.
[0035]
Below the transport mechanism 20, paper cassettes 22a and 22b containing a plurality of recording papers P as image forming media to which images formed by the image forming units 10y, 10m, 10c, and 10k are transferred are arranged. Yes.
[0036]
Pick-up rollers 23a and 23b that take out the recording paper P stored in the paper cassettes 22a and 22b one by one (from the top) at one end of the paper cassettes 22a and 22b and close to the driven roller 92 Is arranged. Between the pickup rollers 23a and 23b and the driven roller 92, the leading edge of the recording paper P taken out from the paper cassettes 22a and 22b and the leading edge of the y toner image formed on the photosensitive drum 61y of the image forming unit 10y are disposed. A registration roller 24 for alignment is disposed. The toner images (m, c, k) formed on the other photosensitive drums 11y, 11m, 11c are supplied to the transfer positions in accordance with the conveyance timing of the recording paper P conveyed on the conveyance belt 21. The
[0037]
Between the registration roller 24 and the first image forming unit 10y, in the vicinity of the driven roller 92, substantially on the outer periphery of the driven roller 92 with the conveying belt 21 interposed therebetween, a predetermined roller via the registration roller 24 is provided. An adsorption roller 26 that provides a predetermined electrostatic attraction force is disposed on the recording paper P that is conveyed at the timing. Note that the axis of the suction roller 26 and the axis of the driven roller 92 are arranged in parallel to each other.
[0038]
One end of the conveyance belt 21, in the vicinity of the drive roller 91, substantially on the outer periphery of the drive roller 91 across the conveyance belt 21, for detecting the position of the image formed on the conveyance belt 21. A misalignment sensor 96 is arranged at a predetermined distance from the drive roller 91. The positional deviation sensor 96 is configured by a transmissive or reflective optical sensor.
[0039]
A conveyor belt cleaning device 95 for removing toner adhering to the conveyor belt 21 or paper dust of the recording paper P is disposed on the conveyor belt 21 on the outer periphery of the drive roller 91 and on the downstream side of the positional deviation sensor 96. Has been.
[0040]
In the direction in which the recording paper P transported via the transport belt 21 is separated from the driving roller 91 and further transported, the toner image transferred to the recording paper P is melted by heating the recording paper P to a predetermined temperature. In addition, a fixing device 80 for fixing the toner image on the recording paper P is disposed. The fixing device 80 includes a pair of heat rollers 81, oil application rollers 82 and 83, a web take-up roller 84, a web roller 85, and a web pressing roller 86. The toner formed on the recording paper P is fixed on the recording paper, and is discharged by the discharge roller pair 87.
[0041]
An exposure apparatus 50 that forms an electrostatic latent image that is color-separated on the outer peripheral surface of each photoconductive drum is provided with image data (y, m, c, k) for each color that is color-separated by an image processing unit described later. ), The semiconductor laser 60 whose emission is controlled based on the above. On the optical path of the semiconductor laser 60, the polygon mirror 51 rotated by the polygon motor 54 that reflects and scans the laser beam, and the focus of the laser beam reflected through the polygon mirror 51 is corrected and imaged. The fθ lenses 52 and 53 are provided in order.
[0042]
Between the fθ lens 53 and the photosensitive drums 61y, 61m, 61c, and 61k, a first folding mirror that folds the laser beam for each color that has passed through the fθ lens 53 toward the exposure position of each photosensitive drum. 55 (y, m, c, k) and second and third folding mirrors 56 (y, m, c), 57 for further folding the laser beam folded by the first folding mirrors 55 y, 55 m, 55 c (Y, m, c) are arranged. The black laser beam is folded back by the first folding mirror 55k and then guided to the photosensitive drum 61k without passing through another mirror.
[0043]
Next, the functions of the image forming apparatus shown in FIG. 1 and an outline of a network including the image forming apparatus will be described with reference to FIG. FIG. 2 is a block diagram showing an outline of each function of the image forming apparatus and a network including the image forming apparatus.
[0044]
As shown in FIG. 2, the image forming apparatus is provided with an external interface 200. An image forming apparatus and a personal computer PC3 as a printer server are connected via the external interface 200. The personal computer PC3 is connected to a network, and a plurality of personal computers PC1 and PC2 are connected to the network. Files created by the personal computers PC1 and PC2 can be printed out by the image forming apparatus via the network and the personal computer PC3.
[0045]
As shown in FIG. 4A, the personal computer PC1 includes a CPU 211, a memory 212, a display unit 213, a keyboard 214, and the like. The CPU 211 controls the entire personal computer PC1. The memory 212 stores data such as various programs. The display unit 213 displays various information. The keyboard 214 receives various inputs.
[0046]
Similarly, as shown in FIG. 4B, the personal computer PC2 includes a CPU 221, a memory 222, a display unit 223, a keyboard 224, and the like. The CPU 221 controls the entire personal computer PC2. The memory 222 stores data such as various programs. The display unit 223 displays various information. The keyboard 224 receives various inputs.
[0047]
Similarly, as shown in FIG. 4C, the personal computer PC3 includes a CPU 231, a memory 232, a display unit 233, a keyboard 234, and the like. The CPU 231 controls the entire personal computer PC3. The memory 232 stores data such as various programs. The display unit 233 displays various information. The keyboard 234 receives various inputs.
[0048]
Returning to the description of the image forming apparatus shown in FIG. The image forming apparatus shown in FIG. 2 includes three CPUs: a main CPU 31 in the main control unit 30, a scanner CPU 100 in the scanner unit 1, and a printer CPU 110 in the printer unit 2.
[0049]
The main CPU 31 performs bidirectional communication with the printer CPU 110 via the shared RAM 35. The main CPU 31 issues an operation instruction, and the printer CPU 110 returns a status status. The printer CPU 110 and the scanner CPU 100 perform serial communication, the printer CPU 110 issues an operation instruction, and the scanner CPU 100 returns a status status.
[0050]
The operation panel 40 is connected to the main CPU 31 and includes a panel CPU 41 that controls the whole, a liquid crystal display 42, and a print key 43. The liquid crystal display unit 42 has a touch panel 42a and functions as an input unit.
[0051]
The main control unit 30 includes a main CPU 31, ROM 32, RAM 33, NVM 34, shared RAM 35, image processing unit 36, page memory control unit 37, page memory 38, and printer font ROM 121.
[0052]
The main CPU 31 controls the entire main control unit 30. The ROM 32 stores a control program and the like. The RAM 33 temporarily stores data.
[0053]
An NVM (nonvolatile RAM) 34 is a non-volatile memory backed up by a battery (not shown), and retains data on the NVM 34 when the power is turned off.
[0054]
The shared RAM 35 is used for bidirectional communication between the main CPU 31 and the printer CPU 110.
The page memory control unit 37 stores or reads out image data in the page memory 38. The page memory 38 has an area where image data for a plurality of pages can be stored, and is formed so that data obtained by compressing image data from the scanner unit 1 can be stored for each page.
[0055]
The printer font ROM 121 stores font data corresponding to print data. The personal computer PC3 as the network controller uses the font data stored in the printer font ROM 121 at the resolution corresponding to the data indicating the resolution added to the print data for the print data received via the network. It plays a role to develop.
[0056]
The scanner unit 1 includes a scanner CPU 100 that controls the entire scanner unit 1, a ROM 101 that stores a control program and the like, a RAM 102 for data storage, a CCD driver 103 that drives a CCD image sensor 15, an exposure lamp 5 and a mirror 7, 11. Scan motor driver 104 that controls the rotation of a motor that moves 11, 12, etc., A / D conversion circuit that converts an analog signal from the CCD image sensor 15 into a digital signal, variation in the CCD image sensor 15, or a change in ambient temperature, etc. An image comprising a shading correction circuit for correcting a variation in the threshold level with respect to the output signal from the CCD image sensor 15 caused by the above, and a line memory for temporarily storing the shading corrected digital signal from the shading correction circuit. It is constituted by the correction unit 105.
[0057]
The printer unit 2 includes a printer CPU 110 that controls the entire printer unit 2, a ROM 111 that stores a control program and the like, a RAM 112 for data storage, a laser driver 113 that turns on / off light emitted from the semiconductor laser 60, and an exposure device 50. A polygon motor driver 114 that controls the rotation of the polygon motor 54, a paper transport unit 115 that controls transport of the paper P by the transport mechanism 20, charging devices 62y, 62m, 62c, and 62k, developing rollers 64y, 64m, 64c, and 64k, transfer The image forming apparatus includes a development process unit 116 that performs charging, development, and transfer using the devices 93y, 93m, 93c, and 93k, a fixing control unit 117 that controls the fixing device 80, and an option unit 118.
[0058]
Further, the image processing unit 36, the page memory 38, the image correction unit 105, and the laser driver 113 are connected by an image data bus 120.
Next, an outline of functions included in the image processing unit 36 will be described with reference to FIG. FIG. 3 is a block diagram for explaining the image processing unit 36.
[0059]
As shown in FIG. 3, the image processing unit 36 includes a color conversion unit 36a, an image quality control circuit 36b, a gradation processing circuit 36c, an access information extraction circuit 36d, a compression / decompression circuit 36e, and the like.
[0060]
The RGB image data transmitted from the scanner unit 1 is input to the color conversion unit 36a. The color conversion unit 36a converts the RGB image data into YMCK image data and outputs it.
[0061]
The YMCK image data output from the color conversion unit 36a is input to the image quality control circuit 36b. The image quality control circuit 36b detects the character area and the halftone area from the YMCK image data, and performs processing corresponding to each area on each area. For example, edge enhancement processing is performed on a character region, and moire suppression processing is performed on a halftone region. In other words, the image quality control circuit 36b outputs YMCK image data that has been processed according to the character area and the halftone area.
[0062]
The YMCK image data output from the image quality control circuit 36b is input to the gradation processing circuit 36c. The gradation processing circuit 36c performs gradation processing suitable for each of the character area and the halftone area. That is, YMCK image data subjected to gradation processing is output from the gradation processing circuit 36c.
[0063]
The YMCK image data output from the gradation processing circuit 36 c is input to the printer unit 2. In the printer unit 2, an image forming process is performed based on the YMCK image data.
[0064]
The access information extraction circuit 36d is a circuit that extracts access information described later from the YMCK image data output from the color conversion circuit 36a. The extraction of access information by this circuit will be described in detail later. The compression / decompression circuit 36e is a circuit that compresses and decompresses image data.
[0065]
Next, various printouts and various copies using the image forming apparatus described above will be described. In that case, it demonstrates with reference to the flowchart shown in FIGS. 5-12 as needed. FIG. 5 is a flowchart for explaining processing in the PC 1 when executing printout by the image forming apparatus based on an instruction from the PC 1. FIG. 6 is a flowchart for explaining processing in the PC 3 when executing printout by the image forming apparatus based on an instruction from the PC 1. FIG. 7 is a flowchart for explaining processing in the image forming apparatus when printout is executed by the image forming apparatus based on an instruction from the PC 1. FIG. 8 is a flowchart for explaining copy processing in the image forming apparatus. FIG. 9 is a flowchart for explaining the original copy mode. FIG. 10 is a flowchart for explaining the additional information compatible copy mode. FIG. 11 is a flowchart for explaining the postscript information filing mode. FIG. 12 is a flowchart for explaining an access permission determination process according to the security level.
[0066]
First, with reference to the flowchart of FIG. 5, processing in the PC 1 when executing printout by the image forming apparatus based on an instruction from the PC 1 will be described. In addition, each process in this PC1 shall be performed by CPU211 of this PC1.
[0067]
In the image forming apparatus of the present invention, security can be enhanced by registering an ID (identification information). Here, only the ID registration procedure will be described, and security by this ID will be described in detail later. The ID is accepted by the PC 1 and registered in the image forming apparatus from the PC 1 through the PC 3. Specifically, when an instruction to display the ID registration screen is received via the keyboard 214 (ST10, YES), the ID registration screen is displayed on the display unit 213 according to the instruction to display the ID registration screen. (ST12). At this time, when an ID is input via the keyboard 214, the input ID is registered in the RAM 33 of the image forming apparatus via the PC1 to PC3 (ST14). Of course, when the ID has already been registered or when the ID registration is unnecessary, it is not necessary to execute the ID registration process.
[0068]
Next, a printout of a file (document file, image file, etc.) created by an application installed on the PC 1 will be described. When a printout of a file created on the PC 1 is instructed via the keyboard (ST16, YES), a print mode selection screen is displayed on the display unit 213 according to the printout instruction (ST18). On this print mode selection screen, a normal print mode and a print mode with access information are displayed, and one of these modes can be selected by the keyboard 214.
[0069]
The normal print mode is a mode for printing out an image formed based on a file to be printed. That is, the normal print mode is the same as the conventional printout. On the other hand, the print mode with access information is a mode in which an image formed based on a file to be printed and access information for accessing the file to be printed are printed out. This print mode with access information will be described in more detail later.
[0070]
When the normal print mode is selected on the print mode selection screen (ST20, NO) (ST22, YES), print information including a file to be printed is transmitted from PC1 to PC3 (ST24). Thereafter, when the PC 1 receives a printout completion response transmitted from the PC 3 (ST34), the print management file is updated by the printer driver installed in the PC 1 (ST36). In the print management file, information such as the name of the file that has been printed out, the date and time when the printout was executed, and the machine number of the image forming apparatus that has executed the printout are recorded. If a printout completion response is not received at PC1 or a printout error response is received at PC1, a printout error is displayed on display unit 213 (ST38).
[0071]
When the print mode with access information is selected on the print mode selection screen (ST20, YES), the access information setting screen is displayed on the display unit 213 (ST26). In this access information setting screen, access information input via the keyboard 214, that is, a storage destination (address information) of a file to be printed, a file name (file name information) of a file to be printed, a password (password information), etc. The setting is accepted. The file to be printed is stored in the storage destination set on the access information setting screen with the file name set on the access information setting screen. The setting of the password is arbitrary, and this password will be described in detail later.
[0072]
When the setting of the access information is completed (YES in ST28), the file to be printed is stored in the storage destination of the file included in the set access information with the file name included in the set access information (ST30). ). Then, print information including a file to be printed and access information for accessing this file (access information set on the access information setting screen) is transmitted from PC1 to PC3 (ST32). Thereafter, when the PC 1 receives a printout completion response transmitted from the PC 3 (ST34), the print management file is updated by the printer driver installed in the PC 1 (ST36). The print management file stores information such as access information, the date and time when the printout was executed, and the machine number of the image forming apparatus that executed the printout. If a printout completion response is not received at PC1 or a printout error response is received at PC1, a printout error is displayed on display unit 213 (ST38).
[0073]
Next, with reference to the flowchart in FIG. 6, processing in the PC 3 when executing printout by the image forming apparatus based on an instruction from the PC 1 will be described. In addition, each process in this PC3 shall be performed by CPU231 of this PC3.
[0074]
When the PC 3 receives print information transmitted from the outside (for example, PC 1) (ST40, YES), the received print information is stored in the memory 232 of the PC 3 (ST42). Further, it is checked whether or not access information is included in the received print information. If access information is not included in the received print information (ST44, NO), image image data is generated based on the file to be printed included in the print information (ST48). Of course, the image data generated at this time does not include access information.
[0075]
If the access information is included in the received print information (ST44, YES), it is checked whether the peripheral area of the recording paper (copy paper or the like) set in the image forming apparatus is white. When setting a recording sheet of a color other than white in the peripheral area to the image forming apparatus, the fact that such a recording sheet has been set in advance is input from the operation panel 40 (strictly, the touch panel 42a) of the image forming apparatus. It is necessary to keep it. Information about the recording paper input from the operation panel 40 is transmitted to the PC 3 and used for color check of the peripheral area of the recording paper.
[0076]
When the peripheral area of the recording paper set in the image forming apparatus is white (when the recording paper is a general copy paper) (ST46, YES), the file to be printed included in the print information and Based on the access information, image data is generated (ST50). At this time, the generated image data includes access information. An image formed based on the image image data, that is, a printout result will be described in detail later. Further, it is assumed that image data is generated in ST50 so that a printout result described later is obtained.
[0077]
When the peripheral area of the recording paper set in the image forming apparatus is a color other than white (ST46, NO), the access information is converted according to the luminance color difference method as disclosed in JP-A-7-123244. . Then, image data is generated based on the file to be printed included in the print information and the access information converted according to the luminance color difference method (ST52).
[0078]
The image image data generated in ST48, ST50, ST52 is transmitted from the PC 3 to the image forming apparatus (ST54). Thereafter, when the PC 3 receives a printout completion response transmitted from the image forming apparatus (ST56), this printout completion response is transmitted to the PC1 (ST58), and the print management file of the PC3 is updated. (ST60). In the print management file, information such as access information, the date and time when the printout was executed, and the machine number of the image forming apparatus that executed the printout are recorded. Note that if the PC 3 does not receive a print-out completion response, or if the PC 3 receives a print-out error response, a print-out error is displayed on the display unit 233 (ST62).
[0079]
Next, with reference to the flowchart of FIG. 7, processing in the image forming apparatus when the image forming apparatus executes printout based on an instruction from the PC 1 will be described. Each process in the image forming apparatus is executed by the main CPU 91 of the image forming apparatus.
[0080]
When the image forming apparatus receives image image data transmitted from the PC 3 as the printer server (ST70, YES), printout is executed based on the received image image data (ST72).
[0081]
Here, an image formed based on image image data transmitted from the PC 3, that is, a printout result will be described. In particular, an image formed based on the image image data generated in ST50 will be described. For example, the access information is recorded as a yellow pattern in the peripheral area a of the sheet as shown in FIG. That is, an image corresponding to the file to be printed is recorded outside the image area b where the image is output. Further, this access information is not simply recorded in the peripheral area a of the paper. More specifically, the access information is recorded in the peripheral area a of the sheet along the four sides of the sheet, that is, along the four sides of the sheet. Accordingly, the access information is recorded at least in four places on the sheet. The access information recorded at these four locations are all recorded in different directions. This makes it possible to read access information from a document set in an arbitrary direction. The access information reading will be described later in detail.
[0082]
Here, the output of a color image will be briefly described. At the time of outputting a color image, as disclosed in JP-A-4-294682, the machine number for specifying the machine body of the image forming apparatus is recorded in a yellow dot pattern. This yellow dot pattern is recorded on the entire surface of the document. This is for identifying an image forming apparatus in which a criminal act is made when a criminal act is identified when a copy prohibited by law is copied. In the image forming apparatus of the present invention, both the machine number and the access information are printed with the same yellow pattern. Therefore, in order to prevent both patterns from overlapping and difficult to identify, the access information is in the peripheral area a and the machine number is the image. Output to area b.
[0083]
In this embodiment, for example, the print rate of the access information is set to about 1/1000 or less so that the access information can hardly be visually recognized. The recording pattern of access information is a recording system of 600 dpi and has three types of dot size widths. That is, recording is performed with 1 dot width (minimum pixel unit), 2 dot width, and 3 dot width. Address information and file name information are encoded in a pattern of 2 dot width and 3 dot width. The password information is encoded with a pattern of 1 dot width.
[0084]
When the password information recorded in the 1-dot width pattern is read by the scanner unit 1, the read level changes depending on the phase (positional relationship of the sensor). Therefore, the pattern indicating the password information is extremely deteriorated in the generation copy in which the copies are overlapped. That is, it is difficult to read the password in the generation copy. Therefore, the degree of image quality deterioration (error rate) is evaluated, and it is determined from the degree of deterioration whether the copy is an original copy. As will be described later, this is used as a means for suppressing printout from a print file contrary to the intention of the file creator.
[0085]
Although the case where the password is recorded in the peripheral area a has been described here, the password may be recorded in the peripheral area a and the image area b. By recording the password in the image area b, it is possible to assert a strong copyright.
[0086]
In this way, access information is recorded in the peripheral area a in a state that can hardly be visually confirmed, and an image corresponding to image data obtained from the file to be printed is formed in the image area b. In this way, an original document printed with access information added has the same image quality as a normal printed document without additional access information, and can be handled as an ordinary document. Become.
[0087]
Next, copy processing in the image forming apparatus will be described with reference to the flowchart of FIG. Each process in the image forming apparatus is executed by the main CPU 91 of the image forming apparatus.
[0088]
Here, processing for obtaining a copy from a document on which access information is recorded (hereinafter referred to as a document with access information) will be described. In the image forming apparatus of the present invention, it is possible to prevent an original copy that is against the will of the creator of the original document. In order to realize this, security levels 1 to 4 can be set for the image forming apparatus. The security levels 1 to 4 will be described in detail later. Only the security level setting procedure will be described here.
[0089]
When an instruction to display the security level setting screen is received via the operation panel 40 of the image forming apparatus (YES in ST80), the security level setting screen is displayed on the liquid crystal display unit 42 according to the instruction to display the security level setting image. Is displayed (ST82). At this time, the security level set via the touch panel 42a of the liquid crystal display unit 42 is set in the RAM 33 (ST84). Of course, when the security level has already been set, or when setting of the security level is unnecessary, it is not necessary to execute the security level setting process.
[0090]
Subsequently, a copy mode selection is required. The selection of the copy mode is performed via a copy mode selection screen displayed on the liquid crystal display unit 42. On the copy mode selection screen, a normal copy mode designation key for designating the normal copy mode and an original copy mode designation key for designating the original copy mode are displayed. When the normal copy mode designation key is pressed, normal copy is subsequently executed. When the original copy designation key is pressed, the original copy is thereafter executed.
[0091]
The normal copy mode is a mode for forming an image based on image data read from a document image. That is, the normal copy mode is the same as the conventional copy. On the other hand, the original copy mode is a mode in which a file is searched based on access information read from a document image and an image is formed based on image data obtained from the searched file.
[0092]
When the normal copy mode is designated by the normal copy mode designation key (ST86, NO) (ST88, YES) and the copy start instruction is given by pressing the print key (ST90, YES), normal copy is executed (ST90, YES). ST92). That is, an image is formed based on the image data read from the document image.
[0093]
When the original copy is designated by the original copy mode designation key (ST86, YES), an additional write copy mode designation key for designating the additional write copy mode is displayed on the liquid crystal display unit. Here, when the additional copy mode is not designated by the additional copy mode designation key (ST94, NO) and the print key is pressed (ST96, YES), the original copy is executed (ST98). When the additional copy mode is designated by the additional copy mode designation key (ST94, YES) and the print key is pressed (ST100, YES), the additional copy is executed (ST102). The original copy executed in ST98 and the additional copy executed in ST102 will be described in detail later.
[0094]
After the additional copy is executed, an additional information filing mode designation key for designating the additional information filing mode is displayed on the liquid crystal display unit 42. Here, when the additional information filing mode is designated by the additional information filing mode designation key (ST104), the additional information filing mode is executed (ST106). The additional information filing mode will be described in detail later.
[0095]
Next, the original copy mode will be described with reference to the flowchart of FIG.
First, the scanner unit 1 reads a document image set at a predetermined position on the document table 4 (ST110). Access information is extracted from the image data acquired by reading the original (ST112).
[0096]
If the access information cannot be extracted (ST114, NO), an error message is displayed on the liquid crystal display unit 42 (ST130). When the extraction of the access information is completed (ST114, YES), the extracted access information is analyzed (ST116). Then, an access permission determination process according to a preset security level is executed (ST118). The access permission determination process according to the security level will be described later in detail, and detailed description thereof is omitted here.
[0097]
If access is not permitted by the access permission determination process (NO in ST120), an error message is displayed on the liquid crystal display unit 42 (ST130). When access is permitted by the access permission determination process (ST120, YES), a file search instruction based on the access information is output to the printer server (PC3) (ST122).
[0098]
In the file search, the analyzed access information is transmitted from the image forming apparatus to the PC 3. In the PC 3, a file search is executed based on the transmitted access information. If the target file is not found in the PC 3, the access information is transmitted to the PC 1, and the search for the target file is executed in the PC 1. If the target file is found, image image data generated from this file and the access information of this file is transmitted to the image forming apparatus. When the image forming apparatus receives image data (ST124, YES), an image forming process is executed based on the received image data (ST126). If no image data is received on the image forming apparatus side (ST124, NO), an error message is displayed on the liquid crystal display (ST130). When the image forming process of ST126 is executed, the print management files of PC1 to PC3 are updated with this image forming process.
[0099]
The original copy mode described here makes it possible to obtain a document with the same image quality as the original. Further, even when the original copy is executed again based on the original obtained by this original copy, the obtained original has the same image quality as the original. Therefore, by this original copy mode, it is possible to always obtain a document having the same image quality as the original.
[0100]
Here, the above-described extraction of access information will be described in more detail. Access information extraction is realized by the access information extraction circuit 36d as described above. The access information recorded in the document is composed of combinations of lines having different thicknesses as shown in FIG. The access information is arranged such that the line thickness changes in the first direction (main scanning direction) and is aligned at the same position in the second direction (sub-scanning direction). Yes.
[0101]
The access information extraction circuit 36d has a 1-line buffer, and accurate access information can be detected by performing an averaging process in the sub-scanning direction with this line buffer. That is, access information can be detected without being affected by noise. In this way, the access information expressed by the line thickness is converted into meaningful access information.
[0102]
Now, at this time, the average number of lines in the sub-scanning direction is changed and the signal coded by the line width is evaluated. Then, in the data of 2 pixels width and 3 pixels width, the value does not change if the averaging process of several lines is performed. However, in the case of 1-pixel width data, a stable signal of about the same level can be obtained by performing an averaging process that is twice or more that of 2-pixel width and 3-pixel width data. This is when a document output in the original print mode (the document shown in FIG. 13) is input. On the other hand, in a copied manuscript copied based on the manuscript output in the original print mode, the in-phase or out-phase state occurs stochastically depending on the relative position with respect to the reading sensor of the one-pixel wide image dot. It is impossible to reproduce it evenly and faithfully. Therefore, some parts are reproduced, but most are not reproduced. Accordingly, it is difficult to obtain a stable signal even if the average processing of a plurality of lines from a copy original is performed. By evaluating the noise level, it is possible to determine whether the copy is a copy. More specifically, the main CPU 91 obtains signals with different average number of sub-scanning processes from the access information extraction circuit 36d, and counts the number of error blocks with a line width of 1 pixel. For an error block, for example, the simplest method is to detect an error by a method such as parity check. If the error rate exceeds a certain level, it is determined that the generation copy has been made. If the error rate is below a certain level, password information can be obtained from the data of one pixel width by the majority method or the like. This access information may be detected at the time of pre-scanning.
[0103]
Next, the additional copy mode will be described with reference to the flowchart of FIG.
It is assumed that some information is added to the original obtained in the original copy mode already described. For example, it is assumed that an original obtained in the original copy mode is circulation, and a seal and various information are additionally written in the circulation. In this case, when the postscript document that has undergone additional recording is copied in the original copy mode, an original document without additional information is obtained. Therefore, such a problem is solved by this additional copy mode.
[0104]
First, the scanner unit 1 reads a document image set at a predetermined position on the document table 4 (ST140). Image data acquired as a result of reading the original is converted into YMCK image data by the color converter 36a, the image quality control circuit 36b, and the gradation processing circuit 36c. Further, the YMCK image data is compressed by the compression / decompression unit 36e and stored in the page memory 38 (ST142).
[0105]
On the other hand, access information is extracted from the image data acquired by the scanner unit 1 (ST144). If the access information cannot be extracted (ST146, NO), an error message is displayed on the liquid crystal display unit 42 (ST162). When the extraction of access information is completed (ST146, YES), the extracted access information is analyzed (ST148). Then, an access permission determination process according to a preset security level is executed (ST150). The access permission determination process according to the security level will be described later in detail, and detailed description thereof is omitted here.
[0106]
If access is not permitted by the access permission determination process (NO in ST152), an error message is displayed on the liquid crystal display unit 42 (ST162). When access is permitted by the access permission determination process (ST152, YES), a file search instruction based on the access information is output to the printer server (PC3) (ST154).
[0107]
In the file search, the analyzed access information is transmitted from the image forming apparatus to the PC 3. In the PC 3, a file search is executed based on the transmitted access information. If the target file is not found in the PC 3, the access information is transmitted to the PC 1, and the search for the target file is executed in the PC 1. If the target file is found, image data generated from this file and the access information of this file is transmitted to the image forming apparatus. On the image forming apparatus side, when image data is received (ST156, YES), the received image data is compressed by the compression / decompression unit 36e. This compressed image data is overwritten and recorded on the image data stored in the page memory 38 in ST142 (ST158).
[0108]
The image data generated by the overwriting recording of ST158 is decompressed by the compression / decompression unit 36e, and image forming processing is executed based on the decompressed image data (ST160). When image data corresponding to the transmitted access information is not received (ST156, NO), an error message is displayed on the liquid crystal display unit (ST162). When the image forming process of ST160 is executed, the print management files of PC3 to PC1 are updated with this image forming process.
[0109]
With this additional copy mode, it is possible to obtain a document having the same image quality as the original and with additional information added.
Next, the additional information filing mode will be described with reference to the flowchart of FIG. This additional information filing mode is a mode for storing additional information in association with the original file.
[0110]
First, the scanner unit 1 reads a document image set at a predetermined position on the document table 4 (ST170). Image data acquired as a result of reading the original is converted into YMCK image data by the color converter 36a, the image quality control circuit 36b, and the gradation processing circuit 36c. Further, the YMCK image data is compressed by the compression / decompression unit 36e and stored in the page memory 38 (ST172).
[0111]
On the other hand, access information is extracted from the image data acquired by the scanner unit 1 (ST174). If the access information cannot be extracted (S176, NO), an error message is displayed on the liquid crystal display unit 42 (ST198). When the extraction of the access information is completed (ST176, YES), the extracted access information is analyzed (ST178). Then, an access permission determination process according to a preset security level is executed (ST180). The access permission determination process according to the security level will be described later in detail, and detailed description thereof is omitted here.
[0112]
If access is not permitted by the access permission determination process (NO in ST182), an error message is displayed on the liquid crystal display unit 42 (ST198). When access is permitted by the access permission determination process (ST182, YES), a file search instruction based on the access information is output to the printer server (PC3) (ST184).
[0113]
In the file search, the analyzed access information is transmitted from the image forming apparatus to the PC 3. In the PC 3, a file search is executed based on the transmitted access information. If the target file is not found in the PC 3, the access information is transmitted to the PC 1, and the search for the target file is executed in the PC 1. If the target file is found, image data generated from this file and the access information of this file is transmitted to the image forming apparatus. On the image forming apparatus side, when the image data is received (ST186, YES), the received image data is sent to the compression / decompression unit 36e (ST188). The image data sent to the compression / decompression unit 36e is compared with the image data stored in the page memory 38 in ST172, and a difference value is calculated (ST190). Then, isolated point removal processing is performed on the difference value image data corresponding to the calculated difference value (ST192). Further, compression processing is performed on the difference value image data that has been subjected to the isolated point removal processing (ST194). The difference value image data subjected to this compression processing is stored in the PC1 to PC3 as the related information of the file indicated by the access information analyzed in ST178 (ST196). The presence of the difference value image data is recorded in the print management file.
[0114]
With this additional information filing mode, additional information can be managed in a very small capacity in association with the original file. Further, in this additional recording information filing mode, the association cancellation may be guarded with a password so that the association of the image data associated with the original file cannot be easily canceled.
[0115]
Next, access permission determination processing according to the security level will be described with reference to the flowchart of FIG.
When security level 1 is set for the image forming apparatus (ST200), access is permitted on the condition that address information, file name information, password information, and ID are confirmed. More specifically, address information and file name information can be analyzed from the acquired access information (ST202, YES), and the image quality degradation degree (error rate) of the password is equal to or less than a predetermined value (ST204, YES). There is a need. Furthermore, the ID input in response to the ID request (ST210) needs to match the ID already registered (ST212, YES). In security level 1, access is permitted only when these conditions are satisfied (ST214).
[0116]
The evaluation of the degree of image quality degradation of the password is for determining whether or not the original is original. In other words, as a result of this evaluation, if the image quality degradation level is equal to or less than a predetermined value, it is determined that the document is original, and if the image quality degradation level exceeds the predetermined value, it is determined that the document is a generation copy. Is done. Incidentally, the original referred to here is an original obtained in the original print mode or an original obtained in the original copy mode. One generation copy refers to a document obtained in the normal copy mode.
[0117]
When the security level 2 is set for the image forming apparatus (ST206, YES), access is permitted on the condition that the address information, the file name information, and the ID are confirmed. More specifically, it is necessary to analyze address information and file name information from the acquired access information (ST208, YES). Furthermore, the ID input in response to the ID request (ST210) needs to match the ID already registered (ST212, YES). In security level 2, access is permitted only when these conditions are satisfied (ST214).
[0118]
If the security level 3 is set for the image forming apparatus (ST216, YES), access is permitted on the condition that the address information, file name information, and password information are confirmed. More specifically, address information and file name information can be analyzed from the acquired access information (ST218, YES), and the image quality deterioration degree (error rate) of the password needs to be a predetermined value or less (ST220). , YES). In security level 3, access is permitted only when these conditions are satisfied (ST228).
[0119]
When the security level 4 is set for the image forming apparatus (ST222, YES), access is permitted on the condition that the address information and the file name information are confirmed. More specifically, it is necessary to analyze address information and file name information from the acquired access information (ST224, YES). In security level 4, access is permitted only when these conditions are satisfied (ST228).
[0120]
The access permission determination process according to the security level can provide excellent security. Therefore, it is possible to prevent an original copy against the will of the owner of the original file.
[0121]
【The invention's effect】
According to the present invention, the following image forming system can be provided.
(1) An image forming system capable of obtaining a document that is substantially the same as the original document with ease of copying.
[0122]
(2) An image forming system capable of preventing overflow of a document that is substantially identical to the original document, contrary to the will of the original document creator.
(3) An image forming system capable of obtaining a document that is substantially the same as the original document and that reflects information added to the original document.
(4) An image forming system capable of managing an original document and information added to the original document in association with each other.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a schematic configuration of an image forming apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating an outline of each function of the image forming apparatus and a network including the image forming apparatus.
FIG. 3 is a block diagram for explaining an image processing unit.
FIG. 4 is a block diagram showing a schematic configuration of PC1, PC2, and PC3.
FIG. 5 is a flowchart for explaining processing in the PC 1 when a printout is executed by the image forming apparatus based on an instruction from the PC 1;
FIG. 6 is a flowchart for explaining processing in PC3 when executing printout by the image forming apparatus based on an instruction from PC1.
FIG. 7 is a flowchart illustrating processing in the image forming apparatus when executing printout by the image forming apparatus based on an instruction from the PC.
FIG. 8 is a flowchart illustrating copy processing in the image forming apparatus.
FIG. 9 is a flowchart for explaining an original copy mode.
FIG. 10 is a flowchart for explaining a copy mode corresponding to additional information;
FIG. 11 is a flowchart for explaining a postscript information filing mode;
FIG. 12 is a flowchart for explaining access permission determination processing according to a security level;
FIG. 13 is a diagram showing an outline of a document on which access information is recorded.
[Explanation of symbols]
1 ... Scanner section
2 ... Printer section
30 ... Main control unit
36. Image processing unit
36a ... Color conversion circuit
36b ... Image quality control circuit
36c: gradation processing circuit
36d ... Access information extraction circuit
36e ... compression / expansion circuit
38 ... Page memory
40 ... Control panel
91 ... Main CPU

Claims (9)

A file storage means for storing the file;
First image output means for adding an access information for accessing a file stored in the file storage means and outputting an image formed based on the file;
Reading means for optically reading the image output by the first image output means and outputting image data;
Extraction means for extracting access information from the image data output from the reading means;
Of the information formed with the first resolution included in the access information extracted by the extracting means and the information formed with the second resolution higher than the first resolution, the information is formed with the second resolution. Based on the access information , the file stored in the file storage means is read out, and an image formed based on the file is output on the condition that the image quality deterioration degree of the information is equal to or less than a predetermined value , Second image output means for prohibiting image output based on the access information on condition that an image quality degradation degree of information formed at the second resolution exceeds a predetermined value ;
An image forming system comprising: A file storage means for storing the file;
First image output means for adding an access information for accessing a file stored in the file storage means and outputting an image formed based on the file;
Reading means for optically reading the image output by the first image output means and outputting image data;
Image data storage means for storing image data output from the reading means;
Extraction means for extracting access information from the image data stored in the image data storage means;
Of the information formed with the first resolution included in the access information extracted by the extracting means and the information formed with the second resolution higher than the first resolution, the information is formed with the second resolution. Based on the access information , the file stored in the file storage means is read out on the condition that the image quality deterioration degree of the information is less than a predetermined value, and the image data formed based on the file is converted into the image data. Second image output means for overwriting the image data stored in the storage means and outputting an image formed based on the image data obtained as a result of the overwriting;
An image forming system comprising:   The second image output means reads the file stored in the file storage means based on the access information extracted by the extraction means, adds access information for accessing this file, The image forming system according to claim 1, wherein an image formed based on the file is output.   The second image output means reads a file stored in the file storage means based on the access information extracted by the extraction means, and the image data formed on the basis of the file is stored in the image data storage means. The image data obtained as a result of the overwriting is output by overwriting the image data stored in the file, adding access information for accessing the file, and outputting the image data as a result of the overwriting. Image forming system.   Compares the image data stored in the image data storage means with the image data formed based on the file read based on the access information extracted from the image data, and corresponds to the difference between the two image data 3. The image forming system according to claim 2, further comprising control means for storing image data to be stored in association with the file. The access information includes address information indicating a storage destination of a file formed with the first resolution and password information indicating a password formed with the second resolution. Item 3. The image forming system according to Item 2. The access information is formed by address information indicating a storage destination of a file formed at the first resolution, file name information indicating a file name formed at the first resolution , and the second resolution. The image forming system according to claim 1, further comprising password information indicating a password. An identification information registration means for accepting registration of identification information and registering the accepted identification information;
Identification information input receiving means for receiving input of identification information;
Control means for executing the output of the image by the second image forming means only when the identification information registered in the identification information registration means matches the identification information received by the identification information input receiving means. When,
The image forming system according to claim 1, further comprising: Store files,
Add access information to access this stored file, output the image formed based on this file,
The output image is optically read, and image data is output.
Access information is extracted from the output image data,
Of the information formed by the first resolution included in the extracted access information and the information formed by the second resolution higher than the first resolution, the information formed by the second resolution On the condition that the image quality deterioration degree is a predetermined value or less, based on the access information , a stored file is read, and an image formed based on the file is output.
An image forming method.

Images