JPS61157152A - Picture reproducing system - Google Patents

Abstract

PURPOSE:To operate efficiently a picture display device by providing items such as paper size information or character direction in index information to retrieve picture information in a file. CONSTITUTION:A retrieval code section is provided in the index information, the paper size of picture input and character direction of a document are inputted to the section and the result is stored in a page memory (RAM)42. A CPU39 reads 16-bit 0-15 in X, Y directions in the RAM42 and stores each bit one by one bit in X direction 0-0 and Y direction 0-15 of a RAM43. When one scanning's share of the procedure is finished while being continued, the 16-bit 0-15 in X direction 0 and Y direction 1 of the RAM42 is read and each bit is stored one by one bit in X direction 0-1 and the Y direction 0-15 of the RAM43. The operation is applied to all areas of the RAM42 to store a picture signal turned by 90 deg. into the RAM43.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention sequentially stores image information such as documents in a storage device such as an optical disk, and selects images from among various images stored in the storage device in parentheses as needed. The present invention relates to an image reproduction system capable of searching and reading out required image information.

[Prior art]

2. Description of the Related Art Conventionally, CRT (cathode ray tube) display devices and liquid crystal display devices have been put into practical use as display devices that visually display image information converted into electrical signals.

Furthermore, as a third image display device, the present applicant previously proposed an image display device using electrophotography (Japanese Patent Application No. 1983).
-197410 to 197413). This display device reproduces and displays image information as a toner image, has excellent resolution, makes the image easy to see, can be manufactured with a large screen at a relatively low cost, and is a highly reliable device. An image display device using electrophotography forms an electrostatic latent image on an electrophotographic photoreceptor, for example, in the form of an endless belt, by scanning the photoreceptor with a light beam modulated by an image signal. The image is developed with toner to form a toner image, and the toner image forming area on the photoconductor is moved to the display section, where the toner image is visually viewed on the display section.After the display is finished, the photoconductor is moved. The photoreceptor can be used repeatedly by cleaning the toner image with a cleaning section and erasing the image.

Files that electrically store images for display or recording are also known.

[Problems with conventional technology]

However, in order to read out image data from a file and display or print it, the image direction and size of the file need to be uniform, which makes storing the data in the file a hassle.

Further, in image display devices using electrophotography, the display speed is slow because the photoreceptor serving as the display surface moves from the image forming section to the display section to display the image. Therefore, for A4 size image output, the character direction in the image is 9 as shown in Figure 1 (for BL, as shown in (C)).
It becomes necessary to rotate by σ.

Even if the operator instructs this 90° rotation after displaying, the data output format is rotated by 9σ from that point onward, and it takes a long time until the data is displayed and output again.

[Purpose of the invention]

The purpose of the present invention is to provide items such as paper size information or character direction (vertical/horizontal writing items) in index information consisting of a plurality of items for searching image information in a file,
When outputting information to a display device, items such as characters in the index information are checked, rotated as necessary, and output.

If necessary, it is also possible to perform processing such as movement and scaling based on index information.

[Embodiments of the invention]

The present invention will be explained below with reference to the drawings.

FIG. 2 is an external view of an image processing system to which the present invention is applied. 1 is a microcomputer for system control, R
This is a control unit (hereinafter referred to as a work station) that includes an internal memory such as AM and ROM.

Reference numeral 2 denotes an input unit of the digital copying machine, which is a manuscript league that converts document information of a manuscript placed on a manuscript table into an electrical signal using an image pickup device such as a COD. Reference numeral 3 denotes an output unit of the digital copying machine, which is a high-speed printer such as a laser beam printer that records an image on a recording material based on information converted into an electrical signal.

4 is an image file that has a storage medium such as an optical disk or a magneto-optical disk, and is capable of writing and reading a large amount of image information. Reference numeral 5 denotes a display section that displays image information photoelectrically read by an image sensor of a digital copying machine or image information read out from an image file, and is an endless display section in which a photoconductive layer is provided on a transparent conductive strip-shaped substrate. It has a photosensitive belt of
By irradiating the photoconductive layer with laser light tuned in accordance with the input image signal through the substrate, an electrostatic latent image corresponding to the brightness of the image light is formed on the photoconductive layer, and this formed latent image is transferred to the toner carrier. This is a high-resolution display device that develops a toner (developer) 1ζ having conductivity and magnetism held on top to form a display image.

6 is a floppy disk device that stores index information for searching images of image files.

7 is a cathode tube display device (hereinafter referred to as CRT) that displays image information photoelectrically read by the image sensor (reader) of the digital copying machine and microfilm file, image information read from the image file, system control information, etc. call).

Cables 11 to 15 electrically connect each input/output device. Further, reference numeral 20 denotes a keyboard provided in the control unit 1, and by operating this keyboard 2°, system operation commands, etc. are issued. Reference numeral 21 denotes an operation panel for instructing the operation of the digital copying machine, and includes setting keys for the number of copies, copy magnification, etc., a copy switch 22 for instructing the start of copying, a numerical display, and the like.

FIG. 2 is a block diagram showing the circuit configuration of the image processing system shown in FIG. 1. Each block number ζ corresponding to Fig. 1
are numbered the same as in Figure 1.

First, each block within the control section 1 will be explained. 2° is the keyboard shown in the first diagram, and the operator uses this keyboard 20.
Input system operation instructions at . 32 is a compression/expansion circuit that compresses (reduces redundancy) and expands (returns the reduced redundancy) image information. 34 is a CRT interface for exchanging information with the CRT 7.

The display image on the CRT 7 is information stored in the RAM 47. 35 is an interface for exchanging information with the image file 4; 36 is an interface for exchanging information with the display device 5. Furthermore, 38 is an interface for exchanging information with the document reader 2 and printer 3 that constitute the digital copying machine 46.

39 is a microcomputer (for example, Motorola 6
8000 ) central processing unit (hereinafter referred to as CPO)
It is. 40 is a ROM in which a system control program is written in advance, and the CPU 39 is connected to this ROM.
It is controlled according to the program written in M40. 41
is a RAM, and is mainly used as a working memory of the CPU 39. Reference numeral 42 and 43 are page memories composed of 6.4 KDRAM and the like, which store image signals (image signals read by the document reader 2 and the image file 4) exchanged between each input/output unit. 48 is 16 bi
t bus, through which signals are transferred from each block within the control unit 1.

As mentioned above, 11 to 15 are cables that electrically connect each input/output device, and control signals and image signals are transmitted.The arrows on the cables indicate the flow of images.The flow of control signals is Bidirectional in cable.

Furthermore, since the image signals of the document reader 2, printer 3, and display device 5 are serial signals, the input/output interface 3
8 is a serial-parallel (16
A parallel (16 bit) to serial conversion register for image signal output is provided. The display device interface 36 displays hahararel (
16 bit)→A serial conversion register is provided.

The compression/expansion circuit 32 is configured as shown in FIG. 4, for example. That is, during compression, as shown in Figure 4(a), a line buffer for a constant distortion line (specifically, 16x2
10-bit buffer) 61, compression (MH conversion) circuit 6
2. An EOL generator 63 that generates an end-of-line code (hereinafter simply referred to as EOL) indicating the end of one line; - a CRC generator that generates a cyclic redundancy check code (hereinafter simply referred to as CRC) for each image information of a scanning line; 64, - the above EOL and C at the end of each scan line of converted image information;
It consists of an EOL for adding RC and a CRC addition circuit 65.

Also, when it is extended, as shown in Figure 4(b), the line buff 1
61, an expansion (MH inverse conversion) circuit 66, and an EOL detection circuit 6'l that detects the EOL added to the converted image.

A counter 68 counts the detection result of this EOL detection circuit 67. The number of lines of the converted image is determined by the count number of this counter 68 to a predetermined number of lines (for example, 16×297
a determination circuit 69 for determining whether the line has been reached;
A CRC check circuit 70 that performs a periodic redundancy check using the CRC added to the converted image and the image information of the constant distortion line that has been inversely converted, and a counter 71 that counts errors caused by the check of the CRC check circuit 70. It is comprised of a determination circuit 72 that determines whether the number of error lines is less than or equal to a predetermined number of lines (for example, 64 lines) based on the count number of this counter 71.

Figure 5 shows an example of the structure of index information, which is composed of a search code section that indicates search information and an address code section that indicates the address recorded in file 4. In the search code section, an image is input along with a date and title. The paper size (e.g. A4) and the character direction in which the document is written (e.g. Figure 1 (
In the case of a), the vertical direction is shown in Fig. 1 (in the case of C1, the horizontal direction)
is input.

Further, the address code section consists of the first track address to the image file 4, the third address S@ADR1 and the highest track sector address E@ADH.

Next, a storage (registration) method in such a configuration will be explained with reference to FIG. The registration (memory) mode is selected using the keyboard 20 (step 1).

Search code for image information to be registered next (date, title,
(paper size, font direction, etc.). This allows C.P.
U39 checks the validity of the input data according to the predefined search code format, and
Check whether there will be duplicate registration (step 2). If the search code is overwhelming as a result of the check, then the document reader 2 is operated to photoelectrically convert the image information of the set document, etc., and it is stored in the page memory 42 via the input/output interface 38 ( Step 3). Next, in the CPU, the image information signal stored in the page memory 42 is compressed by the compression/expansion circuit 32 and stored in the page memory 43 (step 4). Next, the CPU activates the image file 4 of the optical disk and causes the compressed image information signal stored in the page memory 43 to be stored in the image file 4 (step 5).

Next, the CPU stores index information consisting of the search code and address code in the floppy disk, and the registration operation ends (step 6).

Next, the image information stored in the image file 4 is displayed on the display device 5.
A search method for outputting data will be explained with reference to FIG.

First, a search mode is set using the keyboard 20 (step 1). Next, use the same keyboard 20 to insert the search code, date, and title (step 7). CPU3
9 sequentially compares and collates the search code with the search codes stored in the Flo-Sopi disk 6, and sequentially checks whether the search code matches the input search code. (Step 8). If the search code matches, the corresponding address information (first track/sector information, last track/sector information) is used to store the image information signal from the image file 4 in the page memory 43 via the interface 35 ( Step 9). Next, CP
U39 operates the expansion section of the compression/expansion circuit 32 (step 10) and transfers the original uncompressed image information signal to the page memory 4.
2.

Next, the CPU 39 determines the character direction code in the search code. In step 11), as shown in FIG. Send it to device 6.

In the case of FIG. 1(b), the contents of the page 42 are rotated by 90 degrees and the result is stored in the page memory 43. After that, start up the display device 5 and display the interface 7Ace 3.
6, the image signal is sent out to the display device 5 as shown in FIG.
Display the image as shown in C).

Next, an example of a method of rotating an image by 90 degrees will be shown using FIG.

The CPU 39 reads 16 bits 0 to 15 in the X direction 0 and y direction O of the page memory 42 and sets each bit to 0 to 0 in the X direction of the page memory 43 . Co-15) In the y direction, store l bits at a time. Next, the page memory 42
Read out 15 bits 16 to 31 in direction 1 and y direction O, and store each bit in the page memory 43 in the X direction 0-0. y direction (
16 to 31) are stored l bit by bit. When one scan is completed by continuing this one after another, 15 bits Q to 15 in the Z direction O1y direction 1 of the page memory 42 will be scanned.
Read each bit in the X direction 0-1 of the page memory 43
, 1 bit at a time in the y direction (0 to 15). By performing this operation for the entire area of the page memory 42, the image signal rotated by 9σ is transferred to the page memory 42.
be memorized.

FIG. 7 shows the details of the display device 5, in which 101 is a vertical device exterior liquid, 102 is a display image viewing hole formed with a large opening on the front plate surface of the exterior tube, and 103 is a front panel with a lower part of the front plate facing forward. 104 is a display window glass placed in the window hole 102, 105, 106, 10
Reference numerals 7 and 108 denote four endless belt-shaped photoreceptor suspensions arranged in parallel to each other with two axes at the upper and lower parts of the outer cylinder 101 in the left-right direction of the outer cylinder, and individually rotatably supported by bearings. The rotating support roller 109 is an endless belt-shaped photoreceptor that is supported by the four rollers 105 to 108. Note that the photoreceptor does not have to be endless.

The endless belt-shaped photoreceptor 109 (hereinafter simply referred to as a belt) has a base layer made of a transparent sheet such as a polyester sheet, and a very thin layer of metal is deposited on the outer surface of the sheet to substantially maintain transparency. imparts conductivity while remaining
It is entirely flexible and consists of a photosensitive material layer (photoconductive layer) such as CdS formed on the metal vapor-deposited side, and is suspended by the four rows 2 mentioned above with the photosensitive material layer outside. Supported.

Among the four rollers 105 to 108, roller 105 is used as a driving roller, and the roller 21 is driven by a motor M (not shown).
05 is rotated. Other three rollers 106-108
At least one of them, for example the roller 106, acts as a belt tension roller to give tension to the suspended belt 109.

Therefore, when the drive roller 105 is driven to rotate counterclockwise in FIG. 7 by the motor M, the suspension belt 109 rotates counterclockwise without waving, sagging, or slipping.

With this rotation, the tensioned surface of the belt 109 is moved between the rollers 105 and 108 into the display screen peep hole 10.
Move through the 2 points from bottom to top.

Reference numeral 110 denotes a laser beam scanning type image exposure device fixedly arranged in the inner space of the hanging belt 109, which includes a semiconductor laser oscillator 111, a polygon mirror scanner 112, an fθ lens (imaging lens) 113, a reflecting mirror 114, and a transparent plate. 115. The transparent plate 115 is a horizontally long transparent flat plate made of glass or plastic, which is placed in pressure contact with the inner surface of the tensioned belt portion between the above-mentioned belt suspension support rollers 107 and 108 with an appropriate force.

In this image exposure device 110, page memories 42, 43
An intermittent laser beam L corresponding to an electric pixel signal supplied from the semiconductor laser oscillator 111 at the front of the figure is oscillated toward a rotating polygon mirror scanner 112 at the rear of the figure. Scanner 11? The laser beam L incident on the belt is swung in the belt width direction and passes through the fθ lens 1132 and the reflecting mirror 11.
4. The laser beam enters the inside of the belt 109 between the rollers 107 and 108 along the path of the transparent plate 115, and is scanned by the laser beam in the belt width direction. As a result, an image is exposed by a laser beam from inside the belt, with this laser beam scanning as a main scanning and the rotational movement of the belt 109 as a sub-scanning.

A toner developer 116 is disposed on the outer surface of the belt between rollers 107 and 108, and has a developing width that is equal to or slightly wider than the belt width. In addition, transparent plate 1
15 is disposed with its lower surface slightly protruding downward from the common tangent below the rollers 107 and 108, and the belt 109
It is brought into pressure contact with the inner surface of the. The developing device 116 is provided with a sleeve 135 having a magnet 134 therein, and the magnet 134 is rotationally driven in the direction of the arrow by a developing motor (not shown). sleeve 135 and bell) 10
A direct current developing bias voltage is applied between the conductive layer 9 and the conductive layer 9 .

Here, image formation, display, and image erasing operations of the display device will be explained.

First, the motor M is driven by the keys on the keyboard 20, and the belt 109, which is a photoreceptor, rotates in the direction of the arrow at a predetermined speed. Next, laser beam scanning exposure of designated image information is started on the inner surface side of belt 109 between rollers 107 and 108, and exposure scanning for two images is performed. At the same time as this exposure, the toner in the developing device 116 acts on the outer surface of the belt, so toner images corresponding to the exposed images are successively formed on the outer surface of the belt 109. When the toner image formed on the outer surface of the belt rotates from bottom to top from the bottom to the top of the display image viewing window 102 as the belt rotates and moves to the designated window range position, once the belt 109 rotates. will be stopped. As a result, an image is displayed in the window hole 102, and the image is visually recognized through the display window glass 104. Next, when the motor M is driven by a belt re-rotation operation command, the belt 109 moves again in the direction of the arrow, the next display image moves to the window hole range position, and the next screen is displayed.

After the image is displayed, the toner image on the outer surface of the belt reaches the toner developing device 116 as the belt rotates, where it is cleaned and removed by a developing brush, and immediately after this cleaning, it is newly exposed and simultaneously developed. A new toner image is formed by receiving the toner image. As mentioned above, the developing device also serves as a cleaning means. In this way, the image information is reproduced and displayed as a toner image, and the image is exposed using a very thin laser aperture, so it is possible to display fine text and other images clearly and with high resolution. In addition to being able to display the image, it has an extremely simple configuration that does not require corona charging means or special cleaning means because it uses a toner application method at the same time as exposure, and large screens can be manufactured at a relatively low cost. A highly reliable display device with less deterioration of the photoreceptor and photoreceptor can be constructed.

As shown above, specify the direction of the characters in the search code, vertically.

By inputting information such as the horizontal direction, a high-resolution image display device can be operated efficiently.

[Brief explanation of drawings]

FIG. 1 is a diagram showing image directions, FIG. 2 is a connection diagram of an image reproduction system, and FIG. 3 is an image reproduction block diagram. FIG. 4 is a companding circuit diagram, and FIG. 5 is a code memory diagram. FIG. 6 is a memory up diagram, FIG. 7 is a perspective view of the display, and FIG. 8 is a flowchart.
is an image file, and 5 is a display device.

Claims (1)

[Claims] It has a storage means for storing a read image signal, and a means for displaying or otherwise reproducing the image stored in the storage means. An image playback system that performs image processing such as rotation and outputs the processed image to a display or the like.