JP2003289536A - Manuscript-imaging apparatus, and method and program for switching image - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manuscript-imaging apparatus, an image-switching method, and an image-switching program that can reliably prevent erroneous display due to erroneous operation by a user and can achieve precise presentation according to the intention of the user. <P>SOLUTION: The manuscript-imaging apparatus 1 is connected to a display 15 comprising a liquid crystal projector and an image-outputting apparatus 46 comprising a personal computer, and has a video signal-switching equipment 47. The video signal-switching equipment 47 switches the image data of internal input obtained by reading the image information of a manuscript 16 to the image data of external input inputted from the image-outputting apparatus 46 for outputting to the display 15. When the image data of the internal input are switched to the image data of the external input for outputting to the display 15, the switching is not immediately executed, it is judged whether input exists in the image data of the external input or not, and a message screen for switching confirmation is displayed to prompt the user to perform reconfirmation. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document image pickup device, an image switching method and a program, and more particularly to a document image which can read an image of a document and directly output it to a display device such as a projector without using a personal computer. The present invention relates to an imaging device, an image switching method, and a program.

[0002]

2. Description of the Related Art Conventionally, presentations have been made using only slides and overhead projectors (OHPs), but in recent years, with the spread of personal computers (hereinafter referred to as "personal computers"), personal computers and projectors have become common. This is being done by a combined system.

In particular, there is a strong demand for using printed materials such as auxiliary materials and handwritten manuscripts in presentations, and there is a demand for a system that combines a scanner and a liquid crystal projector, which are manuscript image pickup devices capable of reading them. . As one of the document imaging devices that meet this demand, a video camera equipped with an area image sensor such as a CCD (Charge Coupled Device) reads image information of a document on a platen as image data, and the image data is converted into a video signal. There is a document camera that outputs. FIG. 12 shows the overall structure of a document camera equipped with an area image sensor.

In FIG. 12, a document camera 50 includes a video camera 31 having an area image sensor, a document table 32 on which a document is placed, and an illuminating device 33 for illuminating a document on the document table 32. It is commercialized as a device for connecting and giving a presentation or a device for connecting a video conference device and inputting an image.

Further, in order to realize high resolution and miniaturization of the original image pickup device, there is proposed an original image pickup device in which a linear image sensor is adopted instead of the area image sensor. FIG. 13 shows a schematic configuration of a document image pickup device including a linear image sensor.

In FIG. 13, a document image pickup device 34 includes a linear image sensor 35 in which a lens such as a contact image sensor (CIS) and primary color light sources (R, G, B) are integrated.
And an A / D converter 36 that converts the image information of the document 43 read by the linear image sensor 35 into digital image data (hereinafter referred to as “image data”).
A display memory 37 for storing (storing) the image data sent from the A / D converter 36, a video signal generator 38 for sequentially converting the image data stored in the display memory 37 into a video signal and outputting the video signal, A CPU 39 for controlling the operation of the entire apparatus, a ROM 40 for storing control programs and control data executed by the CPU 39, an operation method designating switch 41, a sub-scanning position detector 44, and a sub-scanning drive mechanism 45 are provided. There is.

However, in the above-mentioned presentation using the document camera 50 and the document imaging device 34, an operator (user) operates an operation unit such as an operation method designating switch 41 to display a display device such as a liquid crystal projector. The screen was switched.

[0008]

However, in the above-described conventional original image pickup apparatus, the display screen switching function is activated due to an erroneous operation of the user who gives a presentation to cause an erroneous display, and the image is accurately displayed according to the user's intention. There is a problem that it is not possible to give a good presentation.

The present invention has been made in view of the above problems, and it is possible to reliably prevent erroneous display due to an erroneous operation by the user, and to realize an accurate presentation according to the user's intention. An object is to provide an imaging device, an image switching method, and a program.

[0010]

In order to achieve the above object, an original image pickup device according to a first aspect of the present invention includes a reading means for reading an image of an original, a storage means for storing the read image data, and the storage means. A document image pickup device including an output unit for reading and outputting the stored image data, the output unit including a first image data input unit for inputting the image data stored in the storage unit as first image data; Second image data input means for inputting image data output from an external image output device as second image data, the first image data input by the first image data input means, and the first image data Image switching means for switching the second image data input by the second image data input means and outputting the second image data to the external display device.

According to a second aspect of the present invention, there is provided a document image pickup apparatus according to the first aspect.
In the document imaging apparatus described above, when the image switching unit switches from the first image data to the second image data, the second image data input unit inputs the second image data. The presence / absence is judged, and the switching is not executed when the second image data is not input.

According to a third aspect of the present invention, there is provided a document image pickup apparatus according to the second aspect.
In the document imaging apparatus described above, the image switching unit determines whether or not the second image data is input based on a synchronization signal input from the image output apparatus.

According to another aspect of the present invention, there is provided an original image pickup device.
Alternatively, in the document image pickup device described in item 3, when the image switching unit determines that the second image data has not been input, the image display unit displays the absence of the input as a message screen on the display device. To do.

According to a fifth aspect of the present invention, there is provided a document image pickup apparatus according to the first aspect.
The document imaging apparatus according to any one of items 1 to 4,
When switching to either one of the first image data and the second image data, the image switching means causes the display device to display the currently output image data as a message screen. Characterize.

According to another aspect of the present invention, there is provided an original image pickup device.
The document imaging apparatus according to any one of items 1 to 5,
When the second image data is being input by the second image data input unit, a control unit is provided that permits only the operation of at least one of the reading unit and the image switching unit.

According to another aspect of the present invention, there is provided an original image pickup device.
7. The document imaging device according to any one of items 1 to 6,
The first image data input unit continuously inputs the first image data when the image switching unit switches the first image data to the second image data. It is characterized by

The document image pickup device according to claim 8 is the image pickup device according to claim 1.
The document imaging apparatus according to any one of items 1 to 7,
When the input of the second image data by the second image data input means is interrupted during the output of the second image data, the image switching means has interrupted the input of the second image data. Is displayed on the display device as a message screen.

According to a ninth aspect of the present invention, there is provided a document image pickup apparatus according to the first aspect.
9. The document imaging device according to any one of items 8 to 8,
The image switching means is configured to be able to remotely switch to either one of the first image data and the second image data.

In order to achieve the above-mentioned object, an image switching method according to a tenth aspect of the invention is a reading means for reading an image of a document, and a storage means for storing the read image data.
A first image data input step of inputting the image data stored in the storage unit as first image data, in an image switching method of an original image pickup apparatus including an output unit that reads out and outputs the stored image data. A second image data input step of inputting image data output from an external image output device as second image data, and first image data input in the first image data input step. The second image input in the second image data input step
And an image switching step of outputting the image data to the external display device.

The image switching method according to claim 11 is the image switching method according to claim 10, wherein in the image switching step, when switching from the first image data to the second image data is performed, It is characterized in that the presence or absence of the second image data input by the second image data input means is determined, and when the second image data is not input, the switching is not executed.

An image switching method according to a twelfth aspect is the image switching method according to the eleventh aspect, wherein in the image switching step, the presence or absence of the input of the second image data is a synchronization signal input from the image output device. It is characterized by judging based on.

An image switching method according to a thirteenth aspect is the image switching method according to the eleventh or twelfth aspect, wherein when the image switching step determines that the second image data is not input, the input is performed. It is characterized in that the absence is displayed on the display device as a message screen.

An image switching method according to a fourteenth aspect is the image switching method according to any one of the tenth to thirteenth aspects, wherein the image switching step includes the first image data and the second image data. When switching to either one of the above, the currently output image data is displayed on the display device as a message screen.

An image switching method according to a fifteenth aspect is the image switching method according to any one of the tenth to fourteenth aspects, wherein the second image data is input in the second image data input step. In this case, a control step for permitting only the operation of at least one of the reading unit and the image switching unit is provided.

An image switching method according to a sixteenth aspect is the image switching method according to any one of the tenth to fifteenth aspects, wherein the first image data input step is the first image data switching step. When the switching from the image data to the second image data is performed, the first image data is continuously input.

An image switching method according to a seventeenth aspect is the image switching method according to any one of the tenth to sixteenth aspects, wherein the image switching step includes the step of outputting the second image data while outputting the second image data. When the input of the second image data by the image data input means is interrupted, the fact that the input of the second image data is interrupted is displayed on the display device as a message screen.

An image switching method according to claim 18 is the image switching method according to any one of claims 10 to 17, wherein the image switching step includes the first image data and the second image data. It is characterized in that it can be switched to either one of them remotely.

In order to achieve the above object, a program according to a nineteenth aspect of the invention is a reading means for reading an image of a document,
In a program for causing the original image pickup device to execute an image switching method of the original image pickup device, which includes a storage unit that stores the read image and an output unit that reads out the stored image and outputs the image to an external display device, The program inputs a first image data input step of inputting image data stored in the storage means as first image data, and inputs image data output from an external image output device as second image data. Switching between the second image data input step, the first image data input in the first image data input step, and the second image data input in the second image data input step And an image switching step of outputting to an external display device.

[0029]

1 is a block diagram showing the overall structure of a document image pickup apparatus according to an embodiment of the present invention.

In FIG. 1, the original image pickup device 1 is an original document 1
6 is a scanner for reading image information and is connected to a display device 15 such as a liquid crystal projector via a display device connecting connector 51. In addition, the document imaging device 1
Is connected to an image output device 46 such as a personal computer (hereinafter referred to as “personal computer”).

The original image pickup device 1 includes a linear image sensor 2 in which a lens and primary color light sources (R, G, B) are integrated, an original document position detector 3, an original document drive mechanism having a sub-scanning drive mechanism and an original document feeding mechanism. 4 and linear image sensor 2
The A / D converter 5 for converting the image information of the document 16 read by the digital image data (hereinafter referred to as “image data”), and the image data sent from the A / D converter 5 is temporarily stored (stored). A first buffer memory 6, a second buffer memory 7 for compressing and storing image data being displayed on the display device 15 or being displayed, and a display memory 8 for storing image data to be displayed on the display device 15.
And a video signal generator 9 that sequentially converts the image data stored in the display memory 8 into a video signal and outputs the video signal to the video signal switching device 47, a display device information reading device 10, and controls the operation of all the above-mentioned units. In addition, the CPU 11 that executes the processes in FIGS. 3 to 11 described later, and the ROM that stores the control program and the control data executed by the CPU 11
12, a display performance designating switch 13, an operation method designating switch 14, a video signal input from the video signal generator 9 and a video signal input from the image output device 46 are switched by a control signal from the CPU 11. And a video signal switching device 47 for outputting to the display device 15.

The display device 15 is connected to the video signal switching device 47 and the display device information reading device 10 via the display device connecting connector 51. The image output device 46 is
It is connected to the CPU 11, the display device information reader 10, and the video signal switch 47.

In the document imaging apparatus 1, a plurality of documents 17 stored on a document tray 18 shown in FIG.
Then, the image information of the original 16 is read as image data by the linear image sensor 2 as it is conveyed one by one.

The first buffer memory 6 and the second buffer memory 7 are semiconductor memories, but a non-volatile storage device such as a hard disk may be used together. The image information of the document 16 read by the linear image sensor 2 is converted into image data by the A / D converter 5 and stored in the first buffer memory without being subjected to image compression processing.

The first buffer memory 6 has a storage capacity larger than the image data of one original. For example, the document imaging device 1 can switch the display screen of the display device 15 without actually performing the reading operation when the image data of one document or more can be stored in the first buffer memory 6. Therefore, it is possible to realize the same switching time as that of the original image pickup apparatus using the area image sensor.

On the other hand, even when the image data that can be stored in the first buffer memory 6 is less than that of one original, the time until the display by the display device 15 can be shortened according to the storage capacity. It may have a storage capacity smaller than the image data for one sheet.

The image data stored in the first buffer memory 6 is subjected to image compression processing and stored in the second buffer memory 7. The second buffer memory 7 stores the original 1
It is preferable to have a storage capacity larger than the image data for one sheet. In the original image pickup device 1, a second buffer memory 7 having a storage capacity larger than that of two originals is mounted, and it is determined that there is no free space when the remaining storage capacity of the second buffer memory 7 is less than one original. is doing.

The CPU 11 has a first transfer function of transferring the image data from the A / D converter 5 to the first buffer memory 6, and the image data from the first buffer memory 6 or the second buffer memory 7 to the display memory. 8 has a second transfer function of converting the image data into a predetermined display format and transferring it, and a third transfer function of transferring the image data from the first buffer memory 6 to the second buffer memory 7. The image data transferred from the first buffer memory 6 or the second buffer memory 7 to the display memory 8 is sequentially converted into a video signal by the video signal generator 9, and the video data is switched to the video signal switching unit 47 as internally input image data. Is output. The video signal switching unit 47 inputs the image data output from the image output device 46 as external input image data, and inputs the image data output from the video signal generator 9 as internal input image data.

The operation method specifying switch 14 is composed of a document set detector 19 shown in FIG. 2 described later and a remote controller (not shown) which can be remotely operated by infrared communication or the like. The image source (Source) displayed on the display device 15 can be switched, new display, rotation display, mirror image inversion display, and re-display can be performed by pressing the button or operating.

FIG. 2 is a longitudinal sectional view showing the mechanical structure of the original image pickup device 1 of FIG. In the figure, the corresponding elements in FIG. 1 described above are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 2, the original image pickup apparatus 1 includes an original tray 18 for storing a plurality of originals 17, an original set detector 19 which is a part of the operation method designating switch 14,
Separation roller 20 that is a part of document driving mechanism 4, paper feed roller 21 that is a part of document driving mechanism 4, main roller 22 that is a part of document driving mechanism 4, and part of document driving mechanism 4. Paper discharge roller 23, white plate 24, A / D converter 25, first buffer memory 6, second buffer memory 7, display memory 8, video signal generator 9, display device information reader 10, CPU 11 and ROM 12
A main control board 25 on which main control circuits such as the above are mounted, a drive system upper holding member 26, a separation pad 27, a first pinch roller 28, a second pinch roller 29, and a drive system lower holding member 30. It consists of and.

The paper feed roller 21 and the separation roller 20 feed one original 16 out of the plurality of originals 17 stored in the original tray 18 from the original tray 18 to the linear image sensor 2 which is the original reading unit. It is a drive roller of a document feeding mechanism that functions as a feeding unit for performing. The main roller 22 and the paper discharge roller 23 are drive rollers of a sub-scanning drive mechanism for performing sub-scanning for moving the document 16 relatively to the linear image sensor 2.

These two mechanisms need to be driven independently, but in this document imaging apparatus 1, the two power sources can be driven by one power source by combining the switching of the rotation direction of the motor which is the power source and the spring clutch. It can be driven independently.

FIG. 3 is a flow chart showing the processing after activation in the original image pickup apparatus 1 of FIG. This process is C
It is executed by the PU 11.

In FIG. 3, first, internal variables and mechanisms are initialized (steps S1 to S6), and then a loop process for waiting for an instruction by the operation method designating switch 14 is entered (steps S7 to S20). .

The redisplay counter in step S3 is a variable indicating the number of image data stored in the second buffer memory 7. The redisplay pointer in step S4 means which image data among the image data stored in the second buffer memory 7 is displayed in the display memory 8.
Is a variable indicating whether or not the image data is being transferred to, and when it is 0, it indicates that the image data was read last, and as it increases by 1, it indicates that it is image data of an older document in order.

Initialization of the display memory 8 in step S5 is performed by connecting the original document image pickup device 1 and the display device 15 and the original document image pickup device 1 instead of the image data of all black or all white.
The operation is performed by reading the image data from the ROM 12 capable of confirming the operation of, and adjusting the size and image quality of the screen, or by the calculation of the CPU 11.

After step S7, the image displayed on the display device 15 is not the image data of the external input input from the image output device 46 but the image data of the internal input input from the video signal generator 9 ( N in step S7
O), and when the button on the remote controller of the operation method designating switch 14 is pressed and an instruction to newly display an image, rotate the image, reverse display the mirror image, re-display, or switch the image source is given, the instructed content 6 (step S16) to be described later, a rotation display process (step S17) to be described later in FIG. 8, a mirror image reverse display process (step S18) to be described later in FIG. 9, and a redisplay in FIG. 10 to be described later. The processing (step S19) and each processing of the image source switching processing (step S20) of FIG. 11 described later are performed.

On the other hand, in step S7, the display device 1
If the image being displayed at 5 is not the image data of the internal input input from the video signal generator 9 but the image data of the external input input from the image output device 46 (YES in step S7), the operating method When the button on the remote controller of the designating switch 14 is pressed, the above-mentioned new display of the image,
Even if an instruction for rotation display, mirror image inversion display, or redisplay is given, the instruction is not accepted. That is, C
In the PU 11, the externally input image data input from the image output device 46 is displayed on the display device 1 by the video signal switch 47.
5 and the display device 15 is displaying an externally input image, only the operation of reading at least one of the original by pressing a button on the remote controller of the operation method designating switch 14 and the image source switching is permitted. . Also,
When the externally input image data is being output to the display device 15 by the video signal switch 47, the CPU 11 may stop the function of the document imaging device at all.

In step S14, there is no instruction from the user such as new display, rotation display, mirror image inversion display, redisplay, or image source switching by the remote controller of the operation method designating switch 14, and the document 17 is set on the document tray 18. When it is detected by the document set detector 19 (YES in step S13), the first buffer memory 6 becomes full or the document tray 1
The images of the originals are continuously read until the originals 17 stored in 8 are exhausted.

In the present embodiment, when the document 17 stored on the document tray 18 is detected by the document set detector 19 (YES in step S13) and the first buffer memory 6 has a free space ( Y in step S14
ES), the reading of the original 17 is started immediately. However, for example, when a new display is instructed, continuous reading of the original 17 stored on the original tray 18 is started. You may comprise. Also,
Since it is possible to switch to either external input image data or internal input image data by the video signal switch 47, the output source of the image data currently output to the display device 15 and being displayed can be detected. Good.

FIG. 4 is a flowchart showing the document reading process in step S13 of FIG.

In FIG. 4, first, the CPU 11 turns on a light source (not shown) (step S21). The light sources are R, G, and B light sources built in the linear image sensor 2, and the CPU 11 switches between R, G, and B and lights them while one line of the document is read. Next, a motor (not shown) is rotated to drive the sheet feeding roller 21 and the separation roller 20 for feeding, and one of the plurality of originals 17 stored in the original tray 18 is set as the original 16. It is fed (step S22).

When the document position detector 3 detects the document 16 (YES in step S23), the document 16 is fed until it reaches the main roller 22 based on the timing when the document 16 reaches the document position detector 3. Continue (step S2
4). When the document 16 reaches the main roller 22, the rotation of the motor is switched to the sub-scanning direction (step S25),
The driving of the paper feed roller 21 and the separation roller 20 is stopped, and the main roller 22 and the paper discharge roller 23 for sub-scanning are also performed.
Is driven to feed the document 16 (step S26).

Next, when the document 16 reaches the document readable position on the white plate 24 (step S26), C
The PU 11 causes the linear image sensor 2 to read the image information of the document 16 and starts the data transfer of the image information (image data transfer) from the A / D converter 5 to the first buffer memory 6 (step S27). When the data transfer of the image information for one original is completed (YES in step S28), the data transfer to the first buffer memory 6 is terminated (step S29), and the light source is turned off (step S28).
30) Then, the document discharge process is performed and the motor is stopped (step S31).

Next, a monochrome determination process of the read image data is performed (step S32), and when the document is monochrome (YES in step S33), a monochrome flag is set (step S34), and the process returns and the process shown in FIG. Return to processing.

The operation of reading the original 16 in step S27 will be described in detail. When the original 16 reaches the readable position on the white plate 24, R, G, and
The B primary color light is reflected according to the image information of the original document 16, and R,
The linear image sensor 2 reads the G and B image data. At this time, when the original 16 is a non-transparent original, it is reflected on the surface of the original 16, and when the original 16 is a transparent original,
It is reflected by the surface of 6 and the plate surface of the white plate 24.

The CPU 11 detects the timing at which the document 16 deviates from the readable position on the white plate 24 by converting it from the timing when the trailing edge of the document 16 passes the document position detector 3, and the reading of the document 16 is completed. Recognize that. The R, G, B image information of the original 16 read by the linear image sensor 2 is converted into digital image data by the A / D converter 5, and image processing such as gradation conversion and edge enhancement is performed as necessary. Stored in the first buffer memory 6.

FIG. 5 is a flow chart showing the document discharge process in step S6 of FIG.

In FIG. 5, first, the CPU 11 rotates the motor in the sub-scanning direction to cause the main roller 2 for the sub-scanning to rotate.
2 and the discharge roller 23 are driven (step S51).
Next, when the document position detector 3 detects the document 16 (YES in step S52), the process waits until the trailing edge of the document 16 passes through the document position detector 3.

As a result of the determination in step S52, when the document position detector 3 no longer detects the document 16 (NO in step S52), it means that the trailing edge of the document 16 has just passed the document position detector 3. Assuming that the document 16 is converted from this timing, the document 16 is fed by driving the motor until the document 16 is reliably removed from the paper discharge roller 23 (step S53).
The motor is stopped at the stage where the document 16 is separated from the paper discharge roller 23 (step S54), and the process returns to return to the process of FIG.

Next, a process of newly displaying an image in the above-mentioned document image pickup apparatus 1 will be described with reference to FIG.

FIG. 6 is a flowchart showing the new display processing in step S14 of FIG.

In FIG. 6, first, the CPU 11 executes the first
It is determined whether or not the image data is stored in the buffer memory 6 (step S41). When the image data is stored (YES in step S41), the step S41 is performed.
On the other hand, if no image data is stored (NO in step S41), the process proceeds to step 44, and it is determined whether or not there is a document 17 stored in the document tray 18 (step S4).
2).

As a result of the determination in step S42, when there is no document 17 stored in the document tray 18 (NO in step S42), the instruction for new display is ignored and the process returns. YE in step S42
S), read the document 17 and store the image data in the first buffer memory 6 (step S43), and use the image data stored in the first buffer memory 6 for the second buffer memory. The image data is set in step 7 (step S44), and the process returns and returns to the process of FIG.

FIG. 7 is a flowchart showing the image data setting process for the second buffer memory 7 in step S44 of FIG.

In FIG. 7, first, the CPU 11 executes the second
Whether there is free space in the buffer memory 7 of
It is determined whether or not the buffer memory 7 of the second buffer memory 7 is in the full state (step S61), and when it is in the full state (YES in step S61), the oldest image data in the second buffer memory 7 is set to the second buffer memory 7 Deleted from (step S
68), the above-mentioned redisplay counter is decremented (redisplay counter = redisplay counter-1) (step S6).
9) Then, the process returns to step S61 again. This is because the image data in the second buffer memory 7 is compressed, and it is unclear whether another image data can be stored even if one image data is deleted.

If the result of the determination in step S61 is that the second buffer memory 7 is not full (step S61
NO), the re-display pointer and the rotation counter described above are set to 0 when the free space is secured in the second buffer memory 7.
(Steps S62, S63). The rotation counter is a variable indicating how many times the image data in the display memory 8 is rotated with respect to the original image data in the second buffer memory 7. When the value of the rotation counter is n, 90 ° × n rotations. And n takes an integer value from 0 to 3.
The image data in the display memory 8 is the newest image data in the second buffer memory 7, and when the value of the rotation counter is n = 0, the image data is not rotated and has the same orientation as the original image data.

Subsequently, the CPU 11 performs image processing such as resolution conversion, gradation conversion, and edge enhancement on the oldest image data in the first buffer memory 6 as needed, and transfers the image data to the display memory 8 (step S64). ). At this time, when the output mode is the monochrome mode or the monochrome flag is set, the R, G, B single color image data or the brightness data is calculated as the gray scale data and the image data is displayed in the display memory. Transfer to 8.

Next, the oldest image data in the first buffer memory 6 is compressed and transferred to the free area of the second buffer memory 7 (step S65), and the above-mentioned redisplay counter is incremented (redisplay counter). = Redisplay counter + 1) (step S66), and the oldest image data in the first buffer memory 6 is set to the first buffer memory 6
Is deleted (step S67), the process returns and returns to the process of FIG. Thus, by transferring not the image data in the second buffer memory 7 but the image data in the first buffer memory 6 to the display memory 8, it is possible to prevent an extra compression / expansion process of the image data. .

The image data transferred to the display memory 8 is converted into a video signal by the video signal generator 9 and sequentially output to the display device 15 for display via the interface such as the display device connecting connector 51. . As the video signal generated by the video signal generator 9, an analog RGB signal used in a personal computer (hereinafter referred to as “personal computer”) is often used. If the interface can be directly connected to the display device 15 and can notify the display device 15 of the change of the image data of the display memory 8 in real time and reflect it on the display content,
DFP (Digital Flat Panel Standard) and IEEE1
It may be a system of transmitting with a digital signal as defined in 394.

Next, the respective processes of image rotation display, mirror image inversion display, re-display, and image source switching in the above-described original image pickup apparatus 1 will be described with reference to FIGS. In the document imaging apparatus 1, the image operation of the document screen being displayed on the display device 15 includes the rotation display, the mirror image inversion display, and the redisplay processing, as well as the vertical inversion, size change, and
Refers to color tone correction and filter processing.

FIG. 8 is a flow chart showing the rotation display processing in step S15 of FIG.

In FIG. 8, first, the CPU 11 determines whether or not the value of the redisplay counter is 0 (step S).
71). As a result of this determination, when the value of the redisplay counter is 0 (YES in step S71), it means that there is no image data in the second buffer memory 7 and the image data of the original has not been displayed yet. On the other hand, when the value of the redisplay counter is not 0 (NO in step S71), the rotation counter is incremented (rotation counter = rotation counter + 1) and then modulo 4 (MOD4). Is calculated (step S72), and the value of the rotation counter of the angle to be rotated this time is obtained. The modulo 4 operation calculates the remainder by dividing the rotation counter by 4 and performs the modulo operation to obtain 3
The rotation instruction of 60 ° can be returned to the instruction of 0 °.

Subsequently, of the image data in the second buffer memory 7, the image data of the page indicated by the redisplay pointer is read (step S73), the read image data is expanded (step S74), and rotated. It is determined whether or not the value of the counter is 0 (step S75). As a result of this determination, when the value of the rotation counter is 0 (YES in step S75), the process proceeds to step S80, while when the value of the rotation counter is not 0 (N in step S75).
O), the image data is rotated and converted according to the value of the rotation counter (steps S77 to S79), and the image data such as resolution conversion, gradation conversion, and edge emphasis is performed on the rotationally converted image data as necessary. , Data is transferred to the display memory 8 (step S80), and the process returns and returns to the process of FIG.

FIG. 9 is a flow chart showing the mirror image inversion display processing in step S16 of FIG.

In FIG. 9, first, the CPU 11 determines whether or not the value of the redisplay counter is 0 (step S91). As a result of this determination, when the value of the redisplay counter is 0 (YES in step S91), it means that there is no image data in the second buffer memory 7 and the image data of the document has not been displayed yet. In this case, the mirror image inversion display instruction is ignored, and the process returns and returns to the process of FIG.

As a result of the determination in step S91, if the value of the redisplay counter is not 0 (NO in step S91),
Of the image data in the second buffer memory 7, the image data of the page indicated by the redisplay pointer is read (step S92), the read image data is expanded (step S93), and the expanded image data is a mirror image. Inversion conversion (step S94), image processing such as resolution conversion, gradation conversion, and edge enhancement are performed on the image data that has been mirror-image inversion converted, if necessary, and the data is transferred to the display memory 8 (step S95), and returns. Then, the process returns to FIG.

In addition to mirror image inversion by the same processing method as above,
You may make it upside down. Further, the reverse display process and the rotation display may be simultaneously performed.

FIG. 10 is a flow chart showing the redisplay processing in step S17 of FIG.

In FIG. 10, first, the CPU 11 determines whether or not the value of the redisplay counter is 1 or less (step S81). As a result of this determination, when the value of the redisplay counter is 1 or less (YES in step S81), the second
There is no image data in the buffer memory 7 or there is only one image data, and the image data of the original is not displayed yet, or only the image data currently transferred to the display memory 8 and being displayed is the second image data. Stored in the buffer memory 7 of FIG. 3, the instruction for redisplay is ignored, and the process returns to the process of FIG.

As a result of the determination in step S81, when the value of the redisplay counter is not 1 or less, that is, when it is 2 or more (NO in step S81), the redisplay pointer is incremented (redisplay pointer = redisplay pointer + 1). After that, a modulo operation is performed with the value of the redisplay counter to obtain the value of the redisplay counter of the image data stored in the second buffer memory 7 to be displayed this time (step S82).
The modulo operation calculates the remainder divided by the redisplay counter, and by performing this modulo operation, the next redisplay order of the oldest image data can be the newest image data.

Subsequently, the value of the rotation counter is set to 0 (step S83), the image data of the page indicated by the redisplay pointer is read out from the image data in the second buffer memory 7 (step S84), and read out. The image data is decompressed (step S85), the decompressed image data is subjected to image processing such as resolution conversion, gradation conversion, and edge enhancement as necessary, and the data is transferred to the display memory 8 (step S86). The process returns and returns to the process of FIG.

FIG. 11 is a flowchart showing the image source switching process in step S20 of FIG.

In FIG. 11, when the user depresses a button on the remote controller of the operation method designating switch 14 and gives an instruction to switch the image source (YES in step S11 in FIG. 3), the image is currently output to the display device 15. Then, it is determined whether or not the image being displayed is the internally input image data input from the video signal generator 9 (step S101),
When the display image output to the display device 15 is not the image data of the internal input but the image data of the external input input from the image output device 46 (N in step S101).
O), while proceeding to step S106, if the image of the internal input is being displayed (YES in step S101), the image output device 46 should determine whether or not the image data of the external input is input from the image output device 46. It is determined whether there is a sync signal from (step S102). This allows
It is possible to reliably switch the image data of the internal input to the image data of the external input.

As a result of the determination in step S102, if there is no sync signal from the image output device 46 (step S10).
(NO in 2), it is determined that the image data of the external input is not input from the image output device 46, the process returns without executing the switching of the image data, and when the synchronization signal from the image output device 46 is present ( YE in step S102
S), it is determined that the image data of the external input from the image output device 46 is input. Next, without immediately switching the image data, a switching confirmation message screen as to whether or not to perform the switching is displayed on the display device 15 to inform the user (step S103).

Next, in order to reconfirm whether or not the display screen switching operation is in accordance with the user's intention, it is determined whether or not to switch to the externally input image data (step S104). As a result of this determination, when the button on the remote controller is pressed to switch to the image data of the external input (YES in step S104), the switching confirmation message screen is erased and the video signal switching unit 47 inputs the message. The image data is switched to output the externally input image data to the display device 15 and displayed on the display device 15 (step S105), and the process returns and returns to the process of FIG.

In step S106, the internally input image data is displayed, and a switching confirmation message screen as to whether or not to switch is displayed on the display device 15 to inform the user (step S107). Next, to reconfirm whether or not the display screen switching operation is in line with the user's intention,
It is determined whether or not to switch to the internally input image data (step S108). As a result of the determination, if the button on the remote controller is pressed and the input image data is not switched (NO in step S108), the process proceeds to step S105 while the input image data is switched. (YES in step S108),
The switching confirmation message screen is erased (step S10
9) The image data input by the video signal switch 47 is switched to output the internally input image data to the display device 15 and display it on the display device 15 (step S1).
10), and returns to the processing of FIG.

By this processing, double confirmation work is performed when switching the screen displayed on the display device 15, so that an erroneous display due to an erroneous operation by the user is prevented and an accurate presentation according to the user's intention is realized. can do.

In step S104, when the image data of the internal input is switched to the image data of the external input, the input of the image data of the internal input from the video signal generator 9 is not stopped, The image data may be continuously input to the video signal switch 47. With this configuration, when the image data of the external input is switched and then the image data of the internal input is switched again, the image data immediately before the switching can be surely output and displayed. Further, when switching to the image data of the external input, the same effect can be obtained by stopping the functions including the display operation and the like in the original image pickup apparatus 1.

If it is determined in step S102 that externally input image data from the image output device 46 has not been input, the display device 15 displays a message screen indicating that there is no input, The user may be notified. As a result, the image output device 4
It is possible to understand in advance communication troubles and the like with 6, and improve the usability for the user.

According to the above embodiment, when the user gives an instruction to switch the image source, when the image data of the internal input is switched to the image data of the external input and is output to the display device 15, the switching is immediately executed. Instead, the presence / absence of externally input image data is determined (step S102), the switching confirmation message screen is displayed (step S103), and the user is reconfirmed (step S104). It is possible to reliably prevent the display, and it is possible to realize an accurate presentation according to the user's intention.

The present invention supplies a software program (a program corresponding to the flowcharts of FIGS. 3 to 11) that realizes the functions of the above-described embodiments to the CPU 11, and the CPU 11 reads the supplied program. It goes without saying that the object of the present invention can also be achieved by executing the above.

In this case, the program is directly stored in the storage medium storing the program, or the Internet,
It is supplied by being downloaded from another computer, a database or the like (not shown) connected to a commercial network or a local area network.

The above-mentioned program is only required to be able to realize the functions of the above-described embodiments by a computer, and the form thereof is an object code, a program executed by an interpreter, script data supplied to an OS, or the like. May be included.

Furthermore, by supplying a computer with a storage medium in which a software program for realizing the functions of the above-described embodiments is recorded, and the computer or CPU reads and executes the program stored in the storage medium. Needless to say, the object of the present invention is achieved.

In the above embodiment, the program is R
Although it is stored in the OM 12, the storage medium for supplying the program is not limited to this.
RAM, NV-RAM, floppy (registered trademark) disk, hard disk, optical disk, magneto-optical disk, C
D-ROM, MO, CD-ROM, CD-RW, DVD
(DVD-ROM, DVD-R), a magnetic tape, a non-volatile memory card, another ROM, or any other device capable of storing the above program.

[0098]

As described in detail above, according to the apparatus of claim 1 and the method of claim 10, the image data stored in the storage means is input as the first image data and the The image data output from the image output device is input as the second image data, and the input first image data and the second image are switched and output to the external display device, which facilitates the switching of the images. Therefore, it is possible to realize an accurate presentation according to the user's intention.

According to the apparatus of claim 2 and the method of claim 11, when switching from the first image data to the second image data, it is judged whether or not the second image data is input, When there is no input of the second image data,
Since switching is not performed, it is possible to reliably prevent erroneous display due to erroneous operation by the user.

According to the apparatus of the third aspect and the method of the twelfth aspect, the presence / absence of the input of the second image data is judged based on the synchronization signal input from the image output apparatus, so that the switching is surely performed. It can be carried out.

According to the apparatus described in claim 4 and the method described in claim 13, when it is determined that the second image data is not input, the absence of the input is displayed on the display device as a message screen. It is possible to know in advance communication troubles with the image output device and improve the usability for the user.

According to the apparatus of claim 5 and the method of claim 14, when switching to either one of the first image data and the second image data, the currently output image data Is displayed on the display device as a message screen, the usability for the user can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a document imaging device according to an embodiment of the present invention.

FIG. 2 is a schematic vertical sectional view showing a mechanical structure of the original image pickup device 1 of FIG.

FIG. 3 is a flowchart showing a process after activation in the document imaging apparatus 1 of FIG.

FIG. 4 is a flowchart showing a document reading process in step S13 of FIG.

5 is a flowchart showing a document discharge process in step S6 of FIG.

6 is a flowchart showing a new display process in step S14 of FIG.

7 is a flowchart showing a process of setting image data in a second buffer memory 7 in step S44 of FIG.

FIG. 8 is a flowchart showing a rotation display process in step S15 of FIG.

9 is a flowchart showing mirror image inversion display processing in step S16 of FIG.

10 is a flowchart showing a redisplay process in step S17 of FIG.

FIG. 11 is a flowchart showing an image source switching process in step S20 of FIG.

FIG. 12 is a schematic diagram showing an overall structure of a document camera including a conventional area image sensor.

FIG. 13 is a block diagram showing a schematic configuration of a document image pickup apparatus including a conventional linear image sensor.

[Explanation of symbols]

1,34 Document imaging device 2,35 Linear image sensor 3 Document position detector 5,36 A / D converter 6 First buffer memory 7 Second buffer memory 8,37 Display memory 9,38 video signal generator 11,39 CPU 12,40 ROM 15,42 Display 16,43 manuscript 46 image output device 47 video signal switch

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Ryuichi Negishi             1248, Shimokagemori, Chichibu-shi, Saitama             N Electronics Co., Ltd. (72) Inventor Takashi Arai             1248, Shimokagemori, Chichibu-shi, Saitama             N Electronics Co., Ltd. (72) Inventor Yuyuki Tsuchiya             1248, Shimokagemori, Chichibu-shi, Saitama             N Electronics Co., Ltd. F-term (reference) 5C022 AB64 AC03 AC13 AC18 AC42                       AC69 CA07                 5C054 AA01 AA05 CA04 CC02 EC00                       FA00 FF03 GA00                 5C062 AA05 AA14 AB17 AB20 AB21                       AB38 AB46 AC29 AC41 BA04

Claims (19)

[Claims] 1. An original image pickup apparatus comprising: a reading unit that reads an image of an original; a storage unit that stores the read image data; and an output unit that reads and outputs the stored image data. A first image data input means for inputting the image data stored in the storage means as first image data; and a first image data input means for inputting image data output from an external image output device as second image data. External image display by switching between the second image data input means, the first image data input by the first image data input means, and the second image data input by the second image data input means. An original image pickup apparatus, comprising: an image switching unit that outputs the image to the apparatus. 2. The image switching means, when switching from the first image data to the second image data, determines whether or not the second image data is input by the second image data input means. The document imaging apparatus according to claim 1, wherein the determination is not made and the switching is not executed when the second image data is not input. 3. The document imaging apparatus according to claim 2, wherein the image switching unit determines whether or not the second image data is input based on a synchronization signal input from the image output apparatus. . 4. The image switching means, when it is determined that there is no input of the second image data, causes the display device to display a message screen indicating that there is no input of the second image data. Alternatively, the document image pickup device described in item 3. 5. The image switching means, when switching to either one of the first image data and the second image data, the currently output image data as a message screen, and the display device. The document imaging apparatus according to any one of claims 1 to 4, further comprising: 6. A control means for permitting only operation of at least one of the reading means and the image switching means when the second image data is being input by the second image data input means. Claim 1 characterized by the above-mentioned.
The document imaging apparatus according to any one of items 1 to 5. 7. The first image data input means is configured to change the second image data from the first image data by the image switching means.
When the image data is switched to the image data of
7. The original image pickup device according to claim 1, wherein the image data is continuously input. 8. The image switching means, when the input of the second image data by the second image data input means is interrupted during the output of the second image data, the second image data of the second image data is output. 8. The document imaging apparatus according to claim 1, wherein a message screen indicating that the input has been interrupted is displayed on the display device. 9. The image switching means is configured to be able to remotely switch to either one of the first image data and the second image data. Item 9. The document imaging device according to any one of items 1 to 8. 10. An image switching method for a document imaging apparatus, comprising: a reading unit that reads an image of a document; a storage unit that stores the read image data; and an output unit that reads and outputs the stored image data. A first image data input step of inputting image data stored in the storage means as first image data, and a second image data input step of inputting image data output from an external image output device as second image data Of the image data input step, and the first image data input in the first image data input step and the second image data input in the second image data input step are switched to each other. An image switching method comprising: an image switching step of outputting to a display device. 11. The image switching step, when switching from the first image data to the second image data, determines whether or not the second image data is input by the second image data input means. 11. The image switching method according to claim 10, wherein the switching is not executed when the determination is made and the second image data is not input. 12. The image switching step determines whether or not the second image data is input based on a synchronization signal input from the image output device.
The image switching method described in 1. 13. The image switching step, when it is determined that the second image data has not been input, causes the display device to display a message screen indicating that the second image data has not been input. Alternatively, the image switching method described in 12. 14. The image switching step, when switching to either one of the first image data and the second image data, uses the image data currently output as a message screen as the display device. The image switching method according to any one of claims 10 to 13, characterized in that the image is displayed on the screen. 15. A control step of permitting only the operation of at least one of the reading means and the image switching means when the second image data is input in the second image data input step. Claim 1 characterized by the above.
The image switching method according to any one of 0 to 14. 16. The first image data inputting step is performed from the first image data to the second image data in the image switching step.
When the image data is switched to the image data of
The image switching method according to any one of claims 10 to 15, wherein the image data of (1) is continuously input. 17. The image switching step comprises, when the input of the second image data by the second image data input means is interrupted during the output of the second image data, 2. The display device displays a message screen indicating that the input has been interrupted as a message screen.
17. The image switching method according to any one of 0 to 16. 18. The image switching step can remotely switch to either one of the first image data and the second image data. The image switching method according to item 1. 19. An image of a document image pickup device, comprising: reading means for reading an image of a document; storage means for storing the read image; and output means for reading out the stored image and outputting it to an external display device. In a program for causing the document imaging device to execute the switching method, the program includes a first image data input step of inputting image data stored in the storage means as first image data, and an external image output device. A second image data input step of inputting the output image data as second image data; and a first image data input step of the first image data input step.
The image switching step of switching between the image data of 1) and the second image data input in the second image data input step and outputting the image data to an external display device.