JP2002084381A - Image processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processor that optimizes image processing when scanner data is read. SOLUTION: The image processor converts image signals of a read document into digitized image signals, processes the image signals into prescribed image signals, and stores the image signals in a storing means. Image processing is performed upon assertion of a frame signal indicating the start of reading from a read means. If a negation of a frame signal indicating the end of read is received earlier than the timing of a preset number of lines, the data from the negation of the frame signal to the preset number of lines is stored as white line data in the storing means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus, and more particularly to an apparatus for reproducing a digital image signal on a transfer sheet as an image, and more particularly to an apparatus for reading an image from a scanner and reproducing the image on the transfer sheet. The present invention relates to an image processing device that performs image processing.

[0002]

2. Description of the Related Art Conventionally existing MFPs (copy, facsimile,
Japanese Patent Application Laid-Open No. 8-274988 discloses a technique for optimizing image processing of read signals, image storage in a memory, parallel operation of a plurality of functions, and image processing of each function in a multifunction machine such as a printer and a scanner. Has been invented. This image processing apparatus enables various types of image processing to be executed with one image processing configuration.

[0003]

However, in the above-described image processing apparatus, there is no description about the problem when reading the scanner data.

Accordingly, an object of the present invention is to provide an image processing apparatus for optimizing image processing when reading scanner data.

[0005] That is, the present invention is to achieve several specific objects as described below.

First, a first object of the present invention is to assert a frame gate signal FGATB indicating a range of a document in the sub-scanning direction at the time of scanning with a scanner at the same time as reading, and to set the frame gate signal FGATB at the end of reading. An image processing device that prevents transmission of defective data such that the value to be transmitted as scanner data is not determined when negates a little earlier due to mechanical circumstances, and that transmits non-problematic white line data. To provide. Also, when reading a document shorter in the sub-scanning direction than the transfer paper size, the scanner data from the end of the document in the sub-scanning direction to the transfer paper size is not regarded as defect data whose value is not determined, and white line data having no problem is used. An object of the present invention is to provide an image processing device for transmitting.

A second object is that the original size is not fixed in the sub-scanning direction. For example, when an original at the time of facsimile transmission or a long original is read by a scanner, the original length is previously determined by a mechanical sensor or the like. Even if the line length is detected and the line length is not stored in the line number setting register, the frame gate signal FGATEB indicating the reading range in the sub-scanning direction can be used.
An object of the present invention is to provide an image processing apparatus capable of smoothly moving to a document reading end sequence.

A third object is that the original length is not fixed in the sub-scanning direction. For example, when reading an original at the time of facsimile transmission or a long original with a scanner, the original length is previously determined by a mechanical sensor or the like. Even if the line length is detected and the line length is not stored in the line number setting register, the frame gate signal FGATEB indicating the reading range in the sub-scanning direction can be used.
In an image processing device that enables a smooth transition to the document reading end sequence, the controller that manages the system operation can easily recognize the document size and easily execute processing such as selecting the transfer paper size that matches this. An object of the present invention is to provide an image processing apparatus that can perform the above processing.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, a read original image signal is converted into a digitized image signal, and the image signal is converted into a predetermined image signal. An image processing apparatus for processing and storing the image data in a storage unit, wherein the image processing is executed by asserting a frame signal indicating the start of reading from the reading unit, and a frame signal indicating the end of the reading is negated by a preset line. When the data is received at a timing earlier than the number, the data from the negation of the frame signal to the set number of lines is stored as white line data in the storage means.

According to a second aspect of the present invention, there is provided an image processing apparatus for converting a read original image signal into a digitized image signal, processing the image signal into a predetermined image signal, and storing the image signal in a storage means. When the image processing is executed by asserting a frame signal indicating the start of reading from the reading unit, and negating of the frame signal indicating the end of reading is received at a timing earlier than a preset number of lines, the original image Recognizing that reading has been completed, ending the process of storing the image data in the storage means, and ending the reading of the document image.

According to a third aspect of the present invention, in the image processing apparatus of the second aspect, a line value holding means for holding a line counter when the frame signal indicating the document image area is negated is further provided. It is characterized by having.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An image processing apparatus for reproducing a digital image signal as an image on a transfer sheet,
In particular, as an image processing apparatus for reading an image from a scanner and reproducing the image on transfer paper, the following configuration can be considered.

Overall Configuration: FIG. 1 FIG. 1 is a block diagram showing the configuration of an image processing apparatus for achieving the above object, and particularly relates to the configuration of an MFP.

Referring to FIG. 1, the image processing apparatus comprises the following blocks. In the above configuration, the reading unit 1 that optically reads a document condenses the reflected light of the lamp irradiation on the document on the light receiving element by a mirror and a lens. The light receiving element (in this embodiment, a CCD is taken as an example) is mounted on an SBU (sensor board unit) 2. This CCD
The image signal converted into an electric signal in (SBU2) is converted into a digital signal and then output from SBU2.

An image signal output from the SBU 2 is input to a CDIC (compression / decompression and data interface control unit) 3. The CDIC 3 controls all image data transmission between the functional device and the data bus. Further, the CDIC3 is an SBU for image data.
2. It controls data transfer between the parallel bus 100 and the IPP (image processing processor) 4, and communication between the system controller 15 which controls the overall control of the present embodiment and the process controller 16 for image data.

The image signal from the SBU 2 is transferred to the IPP 4 via the CDIC 3, where the signal deterioration due to the quantization into the optical system and the digital signal (referred to as the signal deterioration of the scanner system) is corrected and output to the CDIC 3 again. Is done.

The data transferred from the IPP 4 to the CDIC 3 is sent from the CDIC 3 to the IMAC 10 (image memory access control) via the parallel bus 100. In this IMAC 10, the system controller 15
Based on the above control, access control of image data and MEM (memory module) 9, expansion of print data of external PC (personal computer) 11, and compression / expansion of image data for effective use of memory are performed.

The data sent to the IMAC 10 is stored in the MEM 9 after data compression. This stored data is read as needed.

The read data read out in this manner is decompressed and returned to the original image data.
0 is returned to the CDIC3 via the parallel bus 100.

After the transfer from the CDIC 3 to the IPP 4, image processing and pulse control by the VDC 5 are performed, whereby the image forming unit 6 forms a reproduced image on transfer paper.

In the flow of image data, the function of the MFP is realized by the bus control by the parallel bus 100 and the CDIC 3.

The facsimile transmission function performs image processing on the read image data by IPP4, and then performs CDI
F3 (FAX) via C3 and parallel bus 100
Control unit) 8.

The FCU 8 converts the notified read image data into a data format corresponding to the communication network,
(Public line) 7 is transmitted as FAX data.

In the processing for FAX reception, the PN
The line data fetched from 7 is converted into image data by the FCU 8 and transferred to the IPP 4 via the parallel bus 100 and the CDIC 3. In this case, no special image quality processing is performed, dot rearrangement and pulse control are performed in the VDC 5, and a reproduced image is formed on the transfer paper in the image forming unit 6.

When a plurality of jobs, for example, a copy function, a facsimile transmission / reception function, and a printer output function operate in parallel, the right to use the reading unit 1, the imaging unit 6, and the parallel bus 100 is allocated to the job by the system controller. 15 and the process controller 16. The process controller 16 controls the flow of image data, and the system controller 15 controls the entire system and manages activation of each resource.

The functions of the MFP described above are described in Op. P
The user selects and inputs the information by using an operation unit 12 (operation unit), thereby setting the processing contents such as the copy function and the FAX function.

The system controller 15 and the process controller 16 communicate with each other via the parallel bus 100, the CDIC 3, and the serial bus 200. At this time, data format conversion is performed in the CDIC 3 for the data interface between the parallel bus 100 and the serial bus 200.

Configuration of IPP4: FIG. 2 FIG. 2 shows an outline of image processing together with a block configuration of the IPP4. The read image is sent to I via SBU2 and CDIC3.
The data is transmitted from the input I / F 41 of the PP 4 to the scanner image processing unit 45. The scanner image processing unit 45 performs shading correction, scanner γ correction, MTF correction, and the like for the purpose of correcting deterioration of a read image signal. It is not a correction process, but also performs a scaling process for enlargement / reduction. After the completion of the correction processing of the read image data, C is output via the output I / F 42.
The image data is transferred to DIC3.

The output to the transfer paper receives image data from the CDIC 3 from the input I / F 43,
The area gradation processing is performed in step. The data after the image quality processing is output to the VDC 5 via the output I / F 44. The area gradation processing includes density conversion, dither processing, error diffusion processing and the like, and the main processing is area approximation of gradation information.

Once the image data subjected to the scanner image processing is stored in the memory, various reproduced images can be confirmed by changing the image quality processing. For example, the atmosphere of the reproduced image can be changed by changing the density of the reproduced image or changing the number of lines of the dither matrix. At this time, it is not necessary to reread the image from the reading unit 1 every time the processing is changed. If the stored image is read from the MEM 9, different processing can be performed on the same data any number of times.

In the case of a single scanner, scanner image processing and gradation processing are performed together and output to the CDIC 3. The processing contents are changed programmably. Switching of processing, change of processing procedure, and the like are managed by the command control unit 47.

Structure of CDIC3: FIG. 3 FIG. 3 schematically shows a block structure of the CDIC3. The image data input / output control unit 31 receives the image data from the SBU 2 and outputs the data to the IPP 4.

In the image data input control unit 32, the IPP4
The scanner-corrected data is input. The input data is subjected to data compression in a data compression unit 33 in order to increase the transfer efficiency in the parallel bus 100. Thereafter, the data is transmitted to the parallel bus 100 via the parallel data I / F 37.

The parallel data I from the parallel bus 100
The image data input via the / F 37 is compressed for bus transfer, and is expanded by the data expansion unit 36. The decompressed image data is transmitted to the image data output control unit 35.
Is transferred to IPP4.

As described above, the CDIC 3 has a function of converting parallel data and serial data.

Since the system controller 15 operates to transfer data to the parallel bus 100 and the process controller 16 operates to transfer data to the serial bus 200, the CDIC 3 performs data conversion for communication between the two controllers.

The CDIC 3 has one system of serial data I / F 39 for itself, and also has an I / F for IPP 4.
/ F.

Structure of VDC 5: FIG. 4 FIG. 4 schematically shows a block structure of the VDC 5. VDC5
Performs additional processing on input image data according to the characteristics of the image forming unit 6. Edge smoothing processing unit 51
Executes the dot rearrangement process by the edge smoothing process, and the pulse control unit 52 executes the pulse control of the image signal for dot formation. After that, the image data processed as described above is output to the image forming unit 6.

The VDC 5 is provided separately from the conversion of the image data.
It has a parallel data and serial data format conversion function, and the VDC 5 alone can support communication between the system controller 15 and the process controller 16.

Structure of IMAC 10: FIG. 5 FIG. 5 shows a schematic block diagram of the IMAC 10. IM
The AC 10 manages an image data interface with the parallel bus 100 in the parallel data I / F 108. In terms of the configuration, it controls storage / readout of image data to / from the MEM 9 and expansion of code data mainly input from the external PC 11 into image data. The input code data is for storing data in a local area in the line buffer 103. The code data stored in the line buffer 103 is developed into image data in the video control unit 104 based on a development processing command from the system controller 15 input via the system controller I / F 101.

The expanded image data or the image data input from the parallel bus 100 via the parallel data I / F 108 is stored in the MEM 9. In this case, image data to be stored is selected in the data conversion unit 107, data compression is performed in the data compression unit 105 to increase the memory use efficiency, and the address of the MEM 9 is changed in the memory access control unit 102. The image data is stored in the MEM 9 while being managed.

When reading the image data stored in the MEM 9, the read destination address is controlled by the memory access control unit 102, and the read image data is expanded by the data expansion unit 106. When transferring the expanded image data to the parallel bus 100, the parallel data I
Data transfer is performed via / F108.

Structure of FCU 8: FIG. 6 FIG. 6 shows an example of the structure of the FCU 8. FCU8 (FAX
The transmission / reception unit converts the image data into a communication format and transmits it to an external line, and converts external data back into image data and records and outputs the image data in the image forming unit 6 via the external I / F 80 and the parallel bus 100. I do.

The FCU 8 (FAX transmission / reception section) includes a FAX image processing section 81, an image memory 82, a memory control section 83, a facsimile control section 84, an image compression / decompression section 85, and a modem 8
6 and a network control unit 87. Among them, regarding the FAX image processing section 81, the binary smoothing processing on the received image is performed in the edge smoothing processing section 51 of the VDC.
As for the image buffer 82, a part of the output buffer function is transferred to the IMAC 10 and the MEM 9.

In the FCU 8 (FAX transmission / reception unit) configured as described above, when starting transmission of image information, the facsimile control unit 84 instructs the memory control unit 83 to store the image information stored in the image memory 82. Read sequentially. The read image information is restored to the original signal by the FAX image processing section 81, is subjected to density conversion processing and scaling processing, and is added to the facsimile control section 84.

The image signal applied to the facsimile control unit 84 is code-compressed by the image compression / decompression unit 85, modulated by the modem 86, and transmitted to the destination via the network control unit 87. Then, the image information whose transmission has been completed is deleted from the image memory.

When receiving the image data, the FCU 8 temporarily stores the received image in the image memory, and if the received image can be recorded and output at that time, the FCU 8 records and outputs the image when the reception of one image is completed. I do. Also, when a call is made during the copying operation and reception is started, the image memory usage is accumulated in the image memory until the usage rate reaches a predetermined value, for example, 80%, and the usage rate of the image memory reaches 80%. , The writing operation being executed at that time is forcibly interrupted, and the received image is read from the image memory and recorded and output. At this time, the received image read from the image memory is deleted from the image memory, and the writing operation which has been interrupted when the usage rate of the image memory drops to a predetermined value, for example, 10%, is resumed, and all the writing operations are completed. At this point, the remaining received images are recorded and output. In addition, after the write operation is interrupted, various parameters for the write operation at the time of the interruption are internally saved so that the write operation can be resumed.
Restore parameters internally.

Next, in addition to the above-described configuration, a configuration and an operation for optimizing image processing when reading scanner data will be described in detail with reference to the drawings.

First, referring to the above system example,
The configuration and operation for optimizing image processing when reading scanner data will be described.

In the block diagram of the image processing apparatus shown in FIG. 1, an image is read by the reading unit 1 at the time of copying, as described above. The read image signal is transferred to SBU2, CDIC3, IPP4, and CDIC3.
It is stored in the frame memory MEM9 via C10.
Thereafter, the image signal is transferred to the frame memory MEM9.
From IMAC 10 and CD via parallel bus 100
Sent to IC3, IPP4, VDC5, imaging unit 6
To be transferred to a transfer image.

Connection from SBU2 to CDIC3: FIG. 7 FIG. 7 shows how the sensor board unit SBU2 is connected to CDIC3. From SBU2, there are mainly two control signals FGATEB and LGATEB and a data line S for scanner data transmission.
D is connected to the image data input control block in CDIC3. "B" at the end of FGATEB and LGATEB indicates that the control signal is negative logic. That is, these signals are asserted when "L", and negated when "H".

Timing chart for transmitting scanner data: FIG. 8 FIG. 8 shows how scanner data is transmitted from the SBU 2 to the CDIC 3 by these signals.

The frame gate signal FGATB is a signal indicating a reading range of the document, and its assertion indicates the start of reading of the document, and negation indicates the end of reading of the document. The line gate signal LGATEB indicates the valid range of the line data, and indicates that the value of the data line SD is valid as scanner data in the asserted state.

.. Problems when transmitting scanner data: FIG.
1 (a), (b), (c) Here, FIG. 11 shows a problem in transmitting scanner data from SBU2 to CDIC3.

FIG. 11A shows an original to be read.
As the definition of the size, take the main scanning direction X in the horizontal direction,
The sub-scanning direction Y is set in the vertical direction. For example, in the case of an A4-size document, the horizontal size in the main scanning direction is 210 mm and the vertical size in the sub-scanning direction is 297 mm. When these originals are read at a resolution of 600 dots per inch (25.4 mm), which is 600 dpi (dot / inch) which is frequently used at present, it becomes about 4961 pixels × 7016 lines.

FIG. 11B shows the relationship between the normal frame gate signal FGATB and the transmitted scanner data.
FGATEB is asserted at the start of document reading, and negated at the end of document reading.

As described above, the frame gate signals FGATEB and S
If the position of the scanner data input from BU2 matches, the transmission image is transmitted correctly. However, there is a case where the timing of negating FGATB at the end of reading the original document is slightly shifted due to a defect in the paper feeding position accuracy of the scanner device or a defect in the detection accuracy of the end of the document. For example, FIG.
1 (c) is a case where the negation of FGATB is longer than the document size. However, in this case, when the line counter exceeds the preset number of lines, it is recognized that the reading of the document has been completed, so that the trouble data is not transmitted to the image storage memory as the image read by the scanner.

Configuration of image data input control block in CDIC3: FIG. 9 FIG. 9 shows the state of the image data input control block in CDIC3 that performs these input controls. The input control sequencer 321 includes a state machine or the like, and performs a counter operation and data input / output control.

Document image line number setting register LREG3
In 23, the number of lines, which is the size of the document in the sub-scanning direction, is set in advance from an external CPU (not shown).

The line counter LCNT322 resets the counter by asserting the reset signal res_LCNT once before reading the document. Then, every time one line of the scanner data is fetched, the counter increment signal inc_LCNT is asserted, and the number of lines of the received scanner data is counted.

The comparator CMP 325 compares the value of the document image line number setting register LREG 323 with the value of the line counter LCNT 322, and
The value of CNT 322 is set in the document image line number setting register LR.
When the value of the EG 323 is reached, the document image reading end signal FRAME_END is asserted, and the document reading is terminated by shifting to the document reading sequence.

Timing deviation between scanner data input and frame gate signal FGATB: FIG. 11D shows an example of timing deviation between scanner data input and frame gate signal FGATB. FIG. 11D shows the frame gate signal earlier than the size of the original.
This is the case when FGATEB is negated. in this case,
Scanner data input is invalidated by negating the frame gate signal FGATB, but the line counter LCNT322
Is set to a preset line number register LREG323.
, The scanner data is continuously transmitted to the image data storage memory.

Therefore, as shown in FIG. 11 (d), after the frame gate signal FGATB is negated, data including black stripes and stains, which are not determined as scanner data, are sent. (D) is output as a transfer image.

When the original is shorter than the standard size,
For example, in the case of the A4 vertical size, the size in the sub-scanning direction is 297 mm as described above, but when the document is as short as 250 mm, a defective image is output to the image memory 82 for the same reason as described above.

Countermeasures when document size is short: FIGS. 9 and 10 Countermeasures for these problems will be described with reference to FIGS. 9 and 10. FIG. FIG. 10 is an example of a state transition diagram of the state machine that is the input control sequencer 321 in FIG. 9 described above.
The state S0 is an idle state in which the reset signal res of the line counter LCNT322 is set.
A register NGCUT3 for storing a line counter value when negating _LCNT and the document frame gate signal FGATB
The reset signal res_NGCUT of 24 is asserted to reset.

In this state, the reading of the document is started, and when the frame gate signal FGATB is asserted, the state S1 is read.
Transitions to. In state S1, each time one line of document scanner data is input, a line counter LCNT32
Assert the increment signal inc_LCNT of 2 to count the number of lines of input scanner data.

When the end of the reading of the document is known by negating the frame gate signal (FGATEB = '1'), the state S1 is changed to the state S2 (when GCUT = '0') or the state S3 (GCUT = '). (1 '). Here, the gate cut mode GCUT transmits the remaining line data to the memory as white line data when scanner data has not yet been input by the set number of lines after the frame gate signal FGATB is negated (GCUT = '0'). If the original is not a fixed size document such as a FAX original or long original, and the frame gate signal FGATB is negated and the scanner data has not yet been input for the set number of lines, the scanner data can be imported. Can I exit (GCUT
= '1').

In state S2, the frame gate signal FG
After the ATEB is negated, if the scanner data has not yet been input by the set number of lines, the white line output signal out_0line indicating that fact is asserted to transmit the remaining line data to the memory as fixed white line data. . This signal becomes the select signal of the multiplexer MUX 326 in FIG. 9. When this signal is “0”, the scanner data input from the SBU 2 is transmitted to the memory. When this signal is “1”, the white data “0” is changed. The data is transmitted to the memory as transmission image data.

In this state, when the line data for the preset number of lines is transmitted to the memory, the line counter LC
The value of NT322 is a line register LREG set in advance.
When the FRAME_END signal is asserted and the FRAME_END signal is asserted, the state transits from the state S2 to the state S4, and the scanner data transmission end signal TRANS_END indicating the end of the transmission of the scanner data to the memory is asserted. In response to this signal, the CDIC 3 performs a transmission sequence end process to the memory.

On the other hand, in the state S3, the original to be read is not of a standard size like a FAX original or a long original, and the value of the line counter LCNT322 at the time when the frame gate signal FGATB is negated is set to the line at the time of the negation of FGATEB. In order to load the number storage register NGCUT 324, ld_NGCUT is output and the state transits to the state S4. The behavior of the state S4 is as described above.

Image after countermeasure: FIG. 12 By the above countermeasure, the image defect shown in FIG. 11D is improved as shown in FIG. FIG. 12A illustrates a read original, FIG. 12B illustrates a transfer sheet,
FIG. 12C shows image data transmitted to the image memory 82 as scanner data.

As shown in FIG. 12C, after the frame gate signal FGATB is negated, white image data is sent, and the image defect as shown in FIG. 11D is solved.

As described above, the frame gate signal FGATB indicating the range of the original in the sub-scanning direction at the time of scanning is asserted at the same time as the reading, and when the reading is completed, the frame gate signal FGATB negates a little earlier due to a precision defect. Even in the case where the error occurs, it is possible to prevent the transmission of defective data such that the value transmitted as the scanner data is not determined, and transmit the image data having no problem.

Also, when reading a document shorter in the sub-scanning direction than the transfer paper size, scanner data from the end of the document in the sub-scanning direction to the transfer paper size is not defective data whose value is not determined, and has no problem. Image data can be transmitted.

FIG. 13 shows a state in which the transmission of the image data to the memory is terminated after the frame gate signal FGATB is negated when the original is not a fixed size such as a FAX original or a long original. I have. As described above, even in such a case, the reading end sequence can be executed smoothly, and the controller that manages the system operation can easily know the document size, and can select the transfer paper size suitable for this. Can be easily executed.

[0076]

As described above, according to the image processing apparatus of the first aspect, the frame gate signal FGATB indicating the range of the original in the sub-scanning direction at the time of reading by the scanner is asserted at the same time as reading, and then read. When the frame gate signal FGATB negates a little earlier due to mechanical reasons when the process ends, there is a means for comparing the line counter value at the time of negation of the frame gate signal with the number of lines of the document set in advance, This function has a function to select and send original data or white line data as scanner data, so if only the number of lines of the original set in advance has not been transmitted yet,
It is possible to prevent transmission of defective data in which the value transmitted as the scanner data is not determined, transmit white line data having no problem, and realize an image processing apparatus that does not output a defective image.

Further, when reading a document shorter in the sub-scanning direction than the transfer paper size, the above function does not cause the scanner data from the end of the document in the sub-scanning direction to the transfer paper size to be inconsistent data whose value is not determined. An image processing apparatus that can transmit white line data without any problem and does not output a defective image can be realized.

Further, according to the image processing apparatus of the second aspect, the size of the document in the sub-scanning direction is not fixed, for example, F
When reading a document or a long document at the time of AX transmission with a scanner, the length of the document is detected in advance by a mechanical sensor or the like, and the line length is not stored in the line number setting register. A low-cost, high-performance image processing device is realized by a mechanism that enables the end of document reading to be detected by the frame gate signal FGATB indicating the reading range, and has a mechanism that enables a smooth transition to the document reading end sequence. can do.

According to the image processing apparatus of the third aspect, the size of the document in the sub-scanning direction is not fixed, for example, F
When reading a document or a long document at the time of AX transmission with a scanner, the length of the document is detected in advance by a mechanical sensor or the like, and the line length is not stored in the line number setting register. A mechanism that can hold or store the value of the line counter at the end of reading even if the size of the document is unknown, in an image processing device that can smoothly transition to the document reading end sequence by the frame gate signal FGATB indicating the reading range. A high-performance image processing apparatus capable of easily recognizing a document size by a controller that manages system operations and easily executing processing such as selection of a transfer paper size suitable for the document size. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an image processing apparatus according to the present invention, and particularly relates to a configuration of an MFP.

FIG. 2 shows an IPP4 included in the image processing apparatus shown in FIG.
FIG. 2 is a diagram showing an outline of image processing together with the block configuration of FIG.

FIG. 3 is a CDIC included in the image processing apparatus shown in FIG. 1;
FIG. 3 is a block diagram schematically showing a block configuration of No. 3;

FIG. 4 shows a VDC 5 included in the image processing apparatus shown in FIG.
FIG. 2 is a block diagram showing an outline of a block configuration of FIG.

FIG. 5 is an IMAC included in the image processing apparatus shown in FIG. 1;
It is a block diagram which shows the outline of 10 block structures.

FIG. 6 shows an FCU 8 included in the image processing apparatus shown in FIG.
FIG. 3 is a block diagram showing an example of the configuration of FIG.

FIG. 7 is a block diagram showing a state of connection from a sensor board unit SBU2 to a CDIC 3 in the image processing apparatus shown in FIG.

FIG. 8 is a timing chart showing how scanner data is transmitted from SBU2 to CDIC3.

FIG. 9 is a block diagram showing a state of an image data input control block in the CDIC 3 shown in FIG.

FIG. 10 is an example of a state transition diagram of a state machine which is the input control sequencer 321 in FIG. 9;

FIG. 11 is a diagram showing a problem in transmitting scanner data from SBU2 to CDIC3. (A) shows a read original. (B) is a normal frame gate signal
The relationship between FGATEB and transmitted scanner data is shown.
(C) shows an example in which the negation of FGATB is protruded longer than the document size. (D) shows an example of the timing shift between the scanner data input and the frame gate signal FGATB.

FIG. 12 is a diagram illustrating an example of a case where the image defect illustrated in FIG. 11D is improved. (A) shows a read original. (B) shows a transfer paper. (C) shows image data transmitted to the image memory 82 as scanner data.

FIG. 13 is a diagram illustrating a state in which transmission of image data to a memory is ended after a frame gate signal FGATB is negated for a document having a non-standard size such as a FAX document or a long document.

[Explanation of symbols]

 1 reading unit 2 SBU 3 CDIC 4 IPP 5 VDC 6 imaging unit 7 PN 8 FCU 9 MEM 10 IMAC 11 PC 12 Ope. Panel 13, 18 ROM 14, 17 RAM 15 System controller 16 Process controller 30 Command control unit 31 Image data input / output control unit 32 Image data input control unit 33 Data compression unit 34 Data conversion unit 35 Image data output control unit 36 Data decompression unit 37 parallel data I / F 38, 39 serial data I / F 41, 43 input I / F 42, 44 output I / F 45 scanner image processing unit 46 image quality processing unit 47 command control unit 51 edge smoothing processing unit 52 pulse control unit 53 Parallel data I / F 54 Data conversion unit 55 Serial data I / F 80 External I / F 81 FAX image processing unit 82 Image memory 83 Memory control unit 84 Facsimile control unit 85 Image compression / decompression unit 86 Modem 87 Network control unit 101 System Control Controller I / F 102 memory access control unit 103 line buffer 104 video control unit 105 data compression unit 106 data decompression unit 107 data conversion unit 108 parallel data I / F 100 parallel bus 200 serial bus 321 input control sequencer 322 LCNT (line counter) ) 323 LREG (document image line number setting register) 324 NGCUT 325 CMP (comparator) 326 MUX

Claims (3)

[Claims] 1. An image processing apparatus for converting a read original image signal into a digitized image signal, processing the image signal into a predetermined image signal, and storing the processed image signal in a storage means. When the image processing is executed by asserting the frame signal indicating the start of reading and the negation of the frame signal indicating the end of reading is received at a timing earlier than the preset number of lines, the number of lines set from the negate of the frame signal An image processing device for storing white line data in the storage means. 2. An image processing apparatus for converting a read original image signal into a digitized image signal, processing the image signal into a predetermined image signal, and storing the processed image signal in a storage means. Image processing is executed by assertion of a frame signal indicating the start of reading, and if a negation of the frame signal indicating the end of reading is received at a timing earlier than the preset number of lines, it is recognized that the original image reading has been completed, An image processing apparatus, wherein the process of storing image data in the storage unit is completed, and the reading of a document image is completed. 3. The image processing apparatus according to claim 2, further comprising a negated line value holding means for holding a line counter value when a frame signal indicating a document image area is negated.