JP4713715B2 - Document imaging apparatus, control method thereof, and storage medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a document imaging apparatus and an imaging method capable of outputting an image read without using a personal computer or the like to a display device such as a projector.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a scanner as a document imaging apparatus operates via a personal computer, and resolution is designated from the personal computer.
Conventionally, presentations have been performed using slides, overhead projectors (OHP), and the like, but with the widespread use of personal computers, presentations using combinations of personal computers and liquid crystal projectors have been performed. Even in this case, there is a high demand for using printed materials such as auxiliary materials and handwritten materials, and there is a need for a document imaging device that is used in combination with a liquid crystal projector.
[0003]
In response to such a demand, an example of a so-called document camera, which is a document imaging device that reads image information of a document on a document table using a video camera using an area image sensor such as a CCD and outputs image data as a video signal. As shown in FIG.
[0004]
In FIG. 13, 33 is a video camera using an area image sensor, 34 is a document table on which a document is placed, and 35 is an illumination device for illuminating the document on this document table 34. Such a document imaging device has been commercialized as a device that performs presentation by connecting to a liquid crystal projector or a device that performs image input by connecting to a video conference device.
[0005]
[Problems to be solved by the invention]
However, a document imaging apparatus using an area image sensor is an apparatus using a video camera developed for moving images. For this reason, when used as a device for making presentations by connecting to a liquid crystal projector, there is generally a feature that a single-screen document can be captured instantaneously, but the following problems arise.
[0006]
In general, the area image sensor has a relatively low resolution, and it is difficult to obtain a sufficient resolution for reading and outputting characters such as a document original.
Since an NTSC signal or S signal used in a general color television or the like is used as an output video signal, it is difficult to utilize the characteristics of a high-quality display device such as a liquid crystal projector as a transmission path.
Since the optical path is a plane, it is difficult to reduce the size of the apparatus by refracting the optical path by reflection of mirrors or the like in multiple stages, so that the size of the apparatus increases both during operation and during storage.
[0007]
In view of this, a document imaging apparatus using a linear image sensor that is expected to have a higher resolution than the area image sensor has been proposed. An example of the block configuration is shown in FIG.
[0008]
FIG. 14 shows a document imaging device 37 using a conventional linear image sensor. In the figure, 2 is a linear image sensor, 5 is an A / D converter that converts image information from the linear image sensor 2 into digital data, 8 is a display memory that stores data from the A / D converter 5, and 9 is a video signal. Generator, 11 is a CPU for controlling the operation of the entire apparatus, 12 is a ROM for storing a control program for the CPU 11, 14 is a switch for designating an operation method, 15 is a display device such as a liquid crystal display, and 16 is read by this apparatus. A document, 38 is a sub-scanning position detector, and 39 is a sub-scanning drive mechanism.
[0009]
However, in the above-described conventional example, there is a problem that an invalid image or a wrong orientation is displayed when the original to be read is a valid image or when the original is set in the wrong direction and read as it is. Was.
[0010]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a document imaging apparatus and an imaging method that can always perform appropriate image display efficiently.
[0011]
[Means for Solving the Problems]
A document imaging apparatus of the present invention includes a reading unit that reads image information from a document,
An A / D converter for converting the image information read by the reading means into image data;
A memory for storing the image data from the A / D converter;
Output means for outputting the image data stored in the memory to a predetermined display device;
Determination means for determining whether or not the image data stored in the memory satisfies a predetermined condition;
If there is a display instruction before scanning of multiple documents is complete, The image data stored in the memory is output by the output means. In the display device output Let , Continue next Manuscript of By the reading means Ru Image information of Read R Can perform actions age ,
Image data that satisfies the predetermined condition based on the determination by the determination means Is in the memory, from the memory The output is not output to the display device but discarded, and the next reading is executed by the reading unit.
[0012]
Further, the document imaging apparatus of the present invention includes a reading unit that reads image information from a document,
An A / D converter for converting the image information read by the reading means into image data;
A memory for storing the image data from the A / D converter;
Output means for outputting the image data stored in the memory to a predetermined display device;
Re-output means for enabling image data to be output again to the display device from among a plurality of image data once output to the display device and stored in the memory;
If there is a display instruction before scanning of multiple documents is complete, The image data stored in the memory is output by the output means. The display device Output to Let , Continue next From the original document by the reading means Ru Image information of Read R Can perform actions age ,
If there is a re-display instruction, the image data is temporarily displayed on the display device, and the image data is stored in the memory. The image data is output again by the re-output means. Was displayed on the display device, and there was a rotation instruction. In case, Displayed After rotating the image data again Output possible To It is characterized by that.
[0013]
According to another aspect of the present invention, there is provided a method for controlling a document imaging device, the step of reading image information from a document by a reading unit;
Converting the image information read by the reading means into image data;
Storing the image data in a memory;
An output step of outputting the image data stored in the memory to a predetermined display device;
A determination step of determining whether or not the image data stored in the memory satisfies a predetermined condition,
If there is a display instruction before scanning of multiple originals is completed , The image data stored in the memory In the display device Execute the output process to output Subsequently, the step of reading the image information from the next original by the reading unit is executed. Possible age ,
Image data that satisfies the predetermined condition based on the determination in the determination step Is in the memory, from the memory The method further includes a step of discarding without outputting to the display device and executing reading of the next document by the reading unit.
[0014]
According to another aspect of the present invention, there is provided a method for controlling a document imaging device, the step of reading image information from a document by a reading unit;
Converting the image information read by the reading means into image data;
Storing the image data in a memory;
An output step of outputting the image data stored in the memory to a predetermined display device;
A plurality of image data once output to the display device and stored in the memory, and a re-output step of outputting the image data again to the display device,
If there is a display instruction before scanning of multiple documents is complete, The image data stored in the memory In the display device output Execute the output step, and continue from the next manuscript The step of reading the image information by the reading means can be executed. age ,
If there is a re-display instruction, the image data is temporarily displayed on the display device, and the image data is stored in the memory. The image data is output in the re-output step Was displayed on the display device, and there was a rotation instruction. In case Displayed Rotate the image data again Output possible To It is characterized by that.
[0019]
The recording medium of the present invention is a computer-readable recording medium storing a program for causing a computer to function as any one of the above means.
[0020]
The recording medium of the present invention is a computer-readable recording medium storing a program for executing the processing procedure of any one of the above methods.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a document imaging apparatus and an imaging method according to the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram that best represents the features of the present invention, and shows a document imaging apparatus 1 of this embodiment. 2 is a linear image sensor, 3 is a document position detector, 4 is a document driving mechanism that serves as both a sub-scanning drive mechanism and a document feeding mechanism, 5 is an A / D converter, and 6 is an A / D read by the linear image sensor 2. A first buffer memory 7 for temporarily storing document information converted into digital data by the converter 5 before it is displayed on a display device via a display memory 8 to be described later, and 7 compresses data during and after display. 2 is a second buffer memory for storing data, 8 is a display memory, 9 is a video signal generator for sequentially converting data written in the display memory 8 into a video signal, and 10 is a display device information reader. .
[0022]
11 is a CPU that controls the operation of the entire apparatus, 12 is a ROM that stores control programs and control data used by the CPU 11, 13 is a display performance designation switch, 14 is an operation method designation switch, and 15 is a display such as a liquid crystal projector. The apparatus, 16 is a document to be read by this apparatus, and 17 is a plurality of documents stored on a document tray 18 described later.
[0023]
The first buffer memory 6 and the second buffer memory 7 may be semiconductor memories, but may be a nonvolatile memory device such as a hard disk. In the apparatus according to the present embodiment, the data stored in the first buffer memory 6 is not compressed and expanded, and only the data stored in the second buffer memory 7 is compressed and expanded.
[0024]
The capacity of the first buffer memory 6 may be at least larger than the capacity of one document, and when the first buffer memory 6 stores data of one document or more, an actual reading operation is performed. Since the display screen can be switched without accompanying, a switching time equivalent to that of the apparatus using the area sensor can be realized. Also, even when data accumulation in the first buffer memory 6 is less than one document, the time until display can be shortened according to the accumulation amount. Even a large capacity is implemented. The capacity of the second buffer memory 7 only needs to be larger than the capacity of one original, but the apparatus of the present embodiment mounts a capacity larger than the capacity of two originals, and each makes a determination of availability. Determines that there is no free space when the free space is less than the capacity of one original to be transferred.
[0025]
The CPU 11 includes a first transfer unit that transfers data from the A / D converter 5 to the first buffer memory 6, a second transfer unit that transfers data from the first buffer memory 6 to the second buffer memory 7, It also has a function as third transfer means for converting data from the first buffer memory 6 or the second buffer memory 7 to the display memory 8 and transferring the data into a predetermined display format.
[0026]
Specifically, the operation method designation switch 14 includes a document set detector 19 described later and a remote control switch that can be remotely operated by infrared rays. With this remote control switch, operations such as new document display, rotation display, and redisplay can be instructed by pressing a button on the remote control switch.
[0027]
FIG. 2 is a cross-sectional view showing the mechanical structure of the document imaging apparatus according to the present embodiment. In the figure, 16 is a document being read, 17 is a document stored on a document tray 18 to be described later, 18 is a document tray, 19 is a document set detector which is a part of the operation method designating switch 14, and 20 is A paper feed roller which is a part of the document driving mechanism 4, a separation roller 21 which is a part of the document driving mechanism 4, a main roller which is a part of the document driving mechanism 4, and a part of the document driving mechanism 4. , 24 is a light source lamp that illuminates the document 16 being read, 25 is a white plate, 26 is a first mirror, 27 is a second mirror, 28 is a third mirror, 29 is a fourth mirror, and 30 is a lens. , 31 are main control circuits such as the A / D converter 5, the first buffer memory 6, the second buffer memory 7, the display memory 8, the video signal generator 9, the display device information reader 10, the CPU 11 and the ROM 12. The main control board for mounting, 32 is mounted on the main control board 31, a display device connector for connecting the video signal generator 9 and the display device information reading unit 10 display a signal 15.
[0028]
The paper feed roller 20 and the separation roller 21 are a document feeding mechanism that functions as a benefit unit for feeding one document 16 of the documents 17 stored in the document tray 18 from the document tray 18 to the document reading unit. It is a drive roller. The main roller 22 and the paper discharge roller 23 are driving rollers of a sub-scanning drive mechanism for performing sub-scanning that moves the document 16 relative to the linear image sensor.
[0029]
These two mechanisms need to be able to be driven independently, but in this device, by combining the switching of the rotation direction of the motor that is the power source and the spring clutch, the two mechanisms can be driven independently by one power source. It has become.
[0030]
FIG. 3 is a flowchart showing a processing procedure after activation in the apparatus of the present embodiment.
First, internal variables and mechanisms are initialized (steps S1 to S6), and then an instruction waiting loop process by the operation method designating switch 14 is entered (S7 to S13).
[0031]
When the display memory 8 is initialized, it is possible to check the connection between the apparatus 1 and the display apparatus 15 and the operation of the apparatus, not the black or white data, and adjust the screen size and image quality. The data that can be read is read from the ROM 12 or initialized by the data of the CPU 11.
The redisplay counter is a variable indicating the number of document information stored in the second buffer memory 7. The redisplay pointer indicates a variable indicating which document information is transferred to the display memory 8 among the document information stored in the second buffer memory 7. When it is 0, it indicates that the document information is read last, and when it is incremented by 1, it indicates information of an older document in order.
[0032]
If there is no instruction for operation such as new document display, rotation display, mirror image reverse display, and redisplay by the remote control switch, and the document set detector 19 detects that the document is set on the document tray, the first The original is continuously read until there is no space in the buffer memory 6 or until there is no original 17 stored in the original tray 18. When an operation instruction is issued by pressing a button on the remote control switch, a new document display (steps S7, S7 ′), a rotation display (steps S8, S8 ′), and a mirror image reverse display (step S9, S9 ′) and re-display (steps S10, S10 ′) are performed.
[0033]
In the present embodiment, the original 17 stored on the original tray 18 is detected by the original set detector 19 (step S11), and if there is an empty space in the first buffer memory 6 (step S12), the original 17 is immediately stored. Configured to start reading. Note that the continuous reading of the originals 17 stored on the original tray 18 may be started when an instruction to display a new original is given.
[0034]
FIG. 4 is a flowchart showing processing steps of document feeding and document reading in the apparatus of the present embodiment.
First, the CPU 11 turns on the light source lamp 24 (step S21), rotates the motor (step S22), drives the paper feed roller 20 and the separation roller 21 for feeding, and stores the originals 17 stored in the original tray 18. One of the originals 16 is fed (step S23). Feeding is continued until the document 16 reaches the main roller 22 with reference to the timing at which the document 16 reaches the document position detector 3 (step S24).
[0035]
When the document 16 reaches the main roller 22, the rotation of the motor is switched to the sub-scanning direction (step S 25), the drive of the paper feed roller 20 and the separation roller 21 is stopped, and the main roller 22 for sub-scanning and the paper discharge are stopped. The roller 23 is driven. When the original 16 reaches the original readable position on the white plate 25 (step S26), the CPU 11 starts data transfer from the A / D converter 5 to the first buffer memory 6 (step S27). When one sheet of data has been transferred (step S28), the data transfer is terminated (step S29). Then, the light source lamp 24 is turned off (step S30), a document discharge process is performed (step S31), and the motor is stopped. At this time, blank page detection of data in the first buffer is performed (step S32), and if it is determined that the page is blank (step S33), this data is discarded (step S34).
[0036]
The reading operation will be described in detail. When the document 16 reaches a readable position on the white plate 25, the light emitted from the light source lamp 24 depends on the image information of the document 16, and in the case of a non-transparent document, the document 16. In the case of a transparent original, it is reflected by the surface of the original 16 and the surface of the white plate 25. Then, the image is read by the linear image sensor 2 via the first mirror 26, the second mirror 27, the third mirror 28, the fourth mirror 29 and the lens 30.
[0037]
The CPU 11 converts the timing at which the trailing edge of the document 16 passes the document position detector 3 to detect the timing at which the document 16 deviates from the readable position on the white plate 25, and the reading of the document 16 is completed. Acknowledge. Image information of the document 16 read by the linear image sensor 2 is converted into digital data by the A / D converter 5. In this case, image processing such as gradation conversion and edge enhancement is performed as necessary and stored in the first buffer memory 6.
[0038]
FIG. 5 is a flowchart showing a document discharge processing procedure in the apparatus of this embodiment.
First, the CPU 11 rotates the motor in the sub-scanning direction (step S51), and drives the main roller 22 and the paper discharge roller 23 for sub-scanning. When the document position detector 3 detects the document 16 (step S52), the process waits until the trailing edge of the document 16 passes the document position detector 3. Converted from this timing, the motor is driven until the document 16 is surely removed from the paper discharge roller 23 (step S53), and when the document 16 is removed, the motor is stopped (step S54).
[0039]
When the document position detector 3 cannot detect the document 16 (step S52), it is assumed that the rear end of the document 16 is immediately after passing the document position detector 3. Then, from this timing, the motor is driven until the original 16 is surely removed from the paper discharge roller 23 (step S53), and the motor is stopped when the original 16 is removed (step S54).
[0040]
FIG. 6 is a flowchart showing a processing procedure for new display of a document in the apparatus of this embodiment.
First, the CPU 11 confirms whether data is stored in the first buffer memory 6 (step S41). If there is data, the data in the first buffer memory 6 is used. If there is no data in the first buffer memory 6, it is checked whether or not there is the original 17 stored in the original tray 18 (step S42). If there is, the original is read (step S43). Then, using the data newly stored in the first buffer memory 6, data is set in the second buffer memory 7 (step S44). When there are no documents 17 stored in the document tray 18, the instruction to display a new document is ignored.
[0041]
FIG. 7 is a flowchart showing a processing procedure of data transfer to the second buffer memory 7 and data transfer to the display memory 8 in the apparatus of this embodiment.
First, the CPU 11 confirms whether or not there is free space in the second buffer memory 7 (step S61). If there is no free space (full), the oldest data in the second buffer memory 7 is deleted from the second buffer memory 7 (step S68), the redisplay counter is decremented (step S69), and again The process returns to the process of confirming whether the second buffer memory 7 has free space.
[0042]
This is because the data in the second buffer memory 7 is compressed, and it is unclear whether another piece of data can be stored even if one piece of data is deleted. When the free space is secured in the second buffer memory 7, the above-mentioned redisplay pointer and rotation counter are set to 0 (steps S62 and S63). The rotation counter is a variable indicating how many times the image in the display memory 8 is rotated with respect to the original data in the second buffer memory 7. When the value of the rotation counter is n, it indicates that the rotation is 90 ° × n, and n takes an integer value from 0 to 3. Therefore, the image data in the display memory 8 is the newest data in the second buffer memory 7, indicating that the image data is not rotated and is in the same direction as the original data.
[0043]
Subsequently, the CPU 11 performs image processing such as resolution conversion, gradation conversion and edge enhancement on the oldest data in the first buffer memory 6 as necessary, and transfers the data to the display memory 8 (step S64). Next, the oldest data in the first buffer memory 6 is compressed and transferred to an empty area in the second buffer memory 7 (step S65), and the redisplay counter is incremented (step S66). The oldest data in the first buffer memory 6 is deleted from the first buffer memory 6 (step S67). The reason why the data in the first buffer memory 6, not the second buffer memory 7, is transferred to the display memory 8 is to prevent unnecessary data from being expanded.
[0044]
The data transferred to the display memory 8 is converted into a video signal by the video signal generator 9 and is sequentially output and displayed on the display device 15 via the display device connection connector 32. As the video signal generated by the video signal generator 9, analog RGB signals used in a personal computer are frequently used, but can be directly connected to the display device 15. If it is possible to notify the display device 15 of a change in the data in the display memory 8 in real time and reflect it in the display contents, a method of transmitting with a digital signal as defined by DFP (Digital Flat Panel Standard) or IEEE1394 But you can.
[0045]
In the present embodiment, image operations on the document screen during display of the apparatus include rotation, mirror image inversion, upside down inversion, size change, redisplay, color correction, filter processing, and the like.
[0046]
Next, a processing procedure for the case of rotation, mirror image reversal, and redisplay will be described.
FIG. 8 is a flowchart showing the processing procedure of the rotation display of the document screen being displayed in the apparatus of the present embodiment.
First, the CPU 11 checks whether or not the value of the redisplay counter is 0 (step S71). If the value of the re-display counter is 0, it indicates that there is no data in the second buffer memory 7 and that the original read data has not been displayed yet. In this case, the rotation display instruction is ignored.
[0047]
If the value of the redisplay counter is other than 0, the modulo 4 (MOD4) is calculated after incrementing the rotation counter (step S72), and the value of the rotation counter at the angle to be rotated this time is obtained. By performing the modulo operation in this way, the 360 ° instruction can be returned to the 0 ° instruction.
[0048]
Subsequently, among the data in the second buffer memory 7 (step S73), the data indicated by the redisplay pointer is expanded (step S74), and the rotation is converted according to the value of the rotation counter (steps S77 to S79). . In this case, image processing such as resolution conversion, gradation conversion, and edge enhancement is performed as necessary and transferred to the display memory 8 (step S80).
[0049]
FIG. 9 is a flowchart showing a processing procedure for mirror image reversal display of a document screen being displayed in the apparatus of the present embodiment.
First, the CPU 11 checks whether or not the value of the redisplay counter is 0 (step S91). If the value of the re-display counter is 0, it indicates that there is no data in the second buffer memory 7 and that the original read data has not been displayed yet. In this case, the instruction for mirror image reversal display is ignored.
[0050]
Subsequently, among the data in the second buffer memory 7 (step S92), the data indicated by the redisplay pointer is expanded (step S93), and mirror image inversion conversion is performed (step S94). In this case, image processing such as resolution conversion, gradation conversion, and edge enhancement is performed as necessary and transferred to the display memory 8 (step S95). In addition to mirror image inversion in the same manner, upside down inversion may be performed. Further, the rotation display and the reverse display processing may be performed simultaneously.
[0051]
FIG. 10 is a flowchart showing a processing procedure for redisplaying a displayed document in the apparatus of this embodiment.
First, the CPU 11 checks whether or not the value of the redisplay counter is 1 or less (step S81). When the value of the redisplay counter is 1 or less, there is no data in the second buffer memory 7 or there is only one sheet, and the original reading data has not been displayed yet, or the current display memory 8 It is shown that only the data that is being transferred and being displayed is stored in the second buffer memory 7. In this case, the redisplay instruction is ignored.
[0052]
When the value of the redisplay counter is 2 or more, the redisplay pointer is incremented, and then the modulo operation is performed with the value of the redisplay counter (step S82). Re Data in the second buffer memory 7 to be displayed Redisplay pointer indicating Find the value of. By performing this modulo operation, Last redisplayed Next to the data data Redisplay should Order of It can be data. Subsequently, the value of the rotation counter is set to 0 (step S83), and the data indicated by the redisplay pointer among the data in the second buffer memory 7 (step S84) is expanded. (Step S85). In this case, image processing such as resolution conversion, gradation conversion, and edge enhancement is performed as necessary and transferred to the display memory 8 (step S86).
[0053]
FIG. 11 is a flowchart showing a blank sheet detection processing procedure according to this embodiment.
First, a histogram of the read image is created for each color (RGB) (step S101). For the created histogram, histogram data with less than 0.005% of the total number of pixels is not adopted for noise removal (step S102). It is determined whether the difference between the maximum value and the minimum value of the histogram of red component data is a certain value or less (in this example, 6 gradations out of 32 gradations) (step S103).
If it is larger than a certain value at this time, it is determined that the paper is not blank (step S107).
[0054]
It is determined whether or not the difference between the maximum value and the minimum value of the histogram of the green component data is equal to or less than a certain value (in this example, 6 gradations out of 32 gradations) (step S104). If it is larger than a certain value at this time, it is determined that the paper is not blank (step S107).
[0055]
It is determined whether or not the difference between the maximum value and the minimum value of the histogram of the blue component data is equal to or less than a certain value (in this example, 6 gradations out of 32 gradations) (step S105). If it is larger than a certain value at this time, it is determined that the paper is not blank (step S107). For reference, an example of a histogram is shown in FIG. Paper that has passed the above determination is determined to be a blank sheet (step S106). Since the determination is performed for each color, it is possible to determine plain paper other than blank paper.
[0056]
Also specific hiss G In the case of gram data, the display may be invalidated. If it is determined that the sheet is blank, if the next original to be read is set in the apparatus, reading is automatically performed.
[0057]
As described above, it is determined whether or not the image is valid after reading the document to be read. If it is determined that the image is invalid, no display can be performed. When making presentations using a number of OHP sheets, when using blank paper as a partition between OHP sheets, using blank paper detection, even when scanning with blank paper sandwiched, blank paper is automatically Only the OHP sheet can be skipped and displayed. As a result, when the memory is used effectively and the present apparatus is used for a presentation or the like, it is possible to suppress useless display of blank paper without classifying OHP and blank paper.
[0058]
Further, when a vertical document and a horizontal document are mixed, an image read in the wrong direction can be displayed in the correct direction without reading the document again by the image rotation function. When OHP or the like is read upside down, the image can be displayed in the correct orientation without reading the original again by the mirror image inversion and upside down functions, and an efficient presentation can be realized. Similarly, image operations such as resizing, redisplaying, color correction, and filter processing have the advantage that an effective presentation can be performed without reading the original again.
[0059]
Here, each functional block and processing procedure shown in the various embodiments described above may be configured by hardware, or configured by a microcomputer system including a CPU or MPU, ROM, RAM, and the like, and the operation thereof is performed by ROM. Alternatively, it may be realized according to a work program stored in the RAM. In addition, what is implemented by supplying a software program for realizing the function to the RAM so as to realize the function of the function block and operating the function block according to the program is also included in the scope of the present invention. include.
[0060]
In this case, the software program itself realizes the functions of the above-described embodiments, and the program itself and means for supplying the program to a computer, for example, a recording medium storing such a program, Constitute. As a storage medium for storing such a program, in addition to the ROM and RAM, for example, a floppy disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-I, a CD-R, a CD-RW, a DVD, a zip, a magnetic A tape or a non-volatile memory card can be used.
[0061]
Further, by executing the program supplied by the computer, not only the functions of the above-described embodiments are realized, but also the OS (operating system) or other application software in which the program is running on the computer. Needless to say, such a program is included in the embodiment of the present invention even when the functions of the above-described embodiment are realized.
[0062]
Further, after the supplied program is stored in the memory provided in the function expansion board of the computer or the function expansion unit connected to the computer, the CPU or the like provided in the function expansion board or function expansion unit based on the instructions of the program Needless to say, the present invention includes the case where the functions of the above-described embodiment are realized by performing part or all of the actual processing.
[0063]
【The invention's effect】
As described above, according to the present invention, it is determined whether or not a predetermined condition is satisfied after the original to be read is read, and when it is determined that the predetermined condition is satisfied, the memory is not displayed. It can be used effectively, and invalid images need not be displayed.
Further, when the image data once output to the display device is output again, an appropriate image display can always be efficiently performed after the reading target document is read by performing a predetermined process.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a document imaging apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view showing a mechanical structure of a document imaging apparatus according to an embodiment of the present invention.
FIG. 3 is a flowchart showing a processing procedure after activation in the document imaging apparatus according to the embodiment of the present invention.
FIG. 4 is a flowchart showing document feeding and reading processing procedures in the document imaging apparatus according to the embodiment of the present invention.
FIG. 5 is a flowchart showing a document discharge processing procedure in the document imaging apparatus according to the embodiment of the present invention.
FIG. 6 is a flowchart showing a new document display processing procedure in the document imaging apparatus according to the embodiment of the present invention;
FIG. 7 is a flowchart showing a processing procedure in transferring data to the second buffer memory and transferring data to the display memory in the document imaging apparatus according to the embodiment of the present invention.
FIG. 8 is a flowchart showing a rotation display processing procedure in the document imaging apparatus according to the embodiment of the present invention;
FIG. 9 is a flowchart showing a processing procedure of mirror image rotation display in the document imaging apparatus according to the embodiment of the present invention.
FIG. 10 is a flowchart showing a processing procedure for redisplaying a displayed document in the document imaging apparatus according to the embodiment of the present invention.
FIG. 11 is a flowchart showing a blank page detection processing procedure in the document imaging apparatus according to the embodiment of the present invention;
FIG. 12 is a diagram showing an example of a histogram created by blank page detection in the document imaging apparatus according to the embodiment of the present invention.
FIG. 13 is a diagram illustrating an example of a conventional document imaging apparatus.
FIG. 14 is a diagram illustrating an example of another conventional document imaging apparatus.
[Explanation of symbols]
1 Document imaging device
2 Linear image sensor
3 Document position detector
4 Sub-scanning drive mechanism
5 A / D converter
6 First buffer memory
7 Second buffer memory
8 Display memory
9 Video signal generator
10 Display device information reader
11 CPU
12 ROM
13 Display performance specification switch
14 Operation method specification switch
15 Display device
16 Manuscript
17 Many documents
18 Document tray
19 Document set detector
20 Paper feed roller
21 Separation roller
22 Main roller
23 Paper discharge roller
24 Light source lamp
25 White plate
26 First mirror
27 Second mirror
28 Third mirror
29 4th Mirror
30 lenses
31 Main control board
32 Display device connector

Claims (14)

Reading means for reading image information from a document;
An A / D converter for converting the image information read by the reading means into image data;
A memory for storing the image data from the A / D converter;
Output means for outputting the image data stored in the memory to a predetermined display device;
Determination means for determining whether or not the image data stored in the memory satisfies a predetermined condition;
If the display instruction prior to completion of the reading of the multi-sheet, the image data stored in said memory by said output means is output to the display device, subsequently that by the reading means of the next document of the image information read - and can execute the operation,
Based on the determination by the determination unit, if image data satisfying the predetermined condition is present in the memory, the image data is discarded without being output to the display device, and the next original is read by the reading unit. An original document imaging apparatus characterized by: The memory includes a buffer memory that stores the image data, and a display memory that stores image data to be displayed on the display device,
2. The document imaging apparatus according to claim 1, wherein the determination unit determines whether or not the image data stored in the buffer memory satisfies a predetermined condition. The buffer memory has a first buffer memory and a second buffer memory,
The image data read by the reading means is stored in the first buffer memory and transferred to the second buffer memory for storage.
3. The document imaging apparatus according to claim 2, wherein the output of the image data to the display device is performed by transferring the image data from the first buffer memory or the second buffer memory to the display memory.   The document imaging apparatus according to claim 1, wherein the determination unit determines whether or not the image data includes a blank sheet as the predetermined condition.   5. The document imaging apparatus according to claim 1, further comprising remote operation means for performing display operation of image data output to the predetermined display device.   The document imaging apparatus according to claim 1, wherein the predetermined condition is based on a histogram of the image data.   The image data is discarded without being output to the display device when the difference between the maximum value and the minimum value of the histogram of the image data is a predetermined value or less. The document imaging device according to claim 1. Reading means for reading image information from a document;
An A / D converter for converting the image information read by the reading means into image data;
A memory for storing the image data from the A / D converter;
Output means for outputting the image data stored in the memory to a predetermined display device;
Re-output means for enabling image data to be output again to the display device from among a plurality of image data once output to the display device and stored in the memory;
If the display instruction prior to completion of the reading of multiple original, the said image data stored in the memory is outputted to the display device by said output means, subsequently the image data that by the said reading means from the next document read - and can execute the operation,
If there is a re-display instruction, the image data is output again by the re-output means from the plurality of image data stored in the memory once displayed on the display device and displayed on the display device. further rotating when the instruction was a document imaging apparatus characterized by enabling output again subjected to a rotation process to the image data displayed.   9. The method according to claim 8, wherein at least one of rotation processing, mirror image inversion processing, and upside down processing of image data output to the predetermined display device can be performed by operating a remote control means. Document imaging device.   The operation according to claim 9, wherein at least one of a size change process, a color tone correction process, and a filter process of image data output to the predetermined display device is possible by an operation of the remote operation unit. Document imaging device. A step of reading image information from a document by reading means;
Converting the image information read by the reading means into image data;
Storing the image data in a memory;
An output step of outputting the image data stored in the memory to a predetermined display device;
A determination step of determining whether or not the image data stored in the memory satisfies a predetermined condition,
If there is a display instruction before the reading of a plurality of originals is completed, the output step of outputting the image data stored in the memory to the display device is executed, and the image information is continuously read from the next original by the reading means. It can execute the process of reading,
Based on the determination in the determination step, when the image data satisfying the predetermined condition is present in the memory, the image data is discarded without being output to the display device, and the next original is read by the reading unit. A method for controlling a document imaging apparatus, further comprising the step of: A step of reading image information from a document by reading means;
Converting the image information read by the reading means into image data;
Storing the image data in a memory;
An output step of outputting the image data stored in the memory to a predetermined display device;
A plurality of image data once output to the display device and stored in the memory, and a re-output step of outputting the image data again to the display device,
If there is a display instruction before the reading of a plurality of originals is completed, the output step of outputting the image data stored in the memory to the display device is executed, and the image information is continuously read from the next original by the reading means. It can execute the process of reading,
If there is a re-display instruction, the image data is output from the plurality of image data temporarily displayed on the display device and stored in the memory in the re-output step and displayed on the display device. A method for controlling a document image pickup apparatus, characterized in that, when there is a further rotation instruction , the displayed image data is rotated and output again .   A computer-readable storage medium storing a program for causing a computer to function as each unit of the document imaging apparatus according to claim 1.   A computer-readable storage medium storing a program for causing a computer to execute each processing procedure of the method for controlling the document imaging device according to claim 11.

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