JPH04114197A - Image processor - Google Patents

Abstract

PURPOSE:To successively display an image even on the way of reading the image by inputting image data outputted from an original reader from the serial port side of a video RAM in the blanking term of a display part. CONSTITUTION:When a reading action for the original reader 18 is started, the image data read out in synchronism with the blanking term is transferred. The image data outputted from the original reader 18 is transferred to a serial access port 10 in an image memory 19 and a data switching circuit 17 through an input/output interface 12. In an ISAP 10, the image data being successively inputted is inputted in serial, and the image is displayed to a random access port 9. Meanwhile, a CRT interface 13 is separated, and the input/output interface 12 and the serial access port (VSAP) 16 are connected with each other by the data switching circuit 17 in the blanking term. Thus, the image data from the original reader 18 is inputted to the VSAP 16 in the blanking term.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device, and particularly to an image processing device that performs processing such as inputting and creating image information such as characters and figures, and outputs the resultant image information.

[Prior Art] Conventionally, in this type of device, after inputting image data for all images read from an image document to a memory for image input/output is completed, the image data is transferred to a memory for display by program control. It is configured to transfer and display from the transferred display memory.

[Problems to be Solved by the Invention] Therefore, the conventional image processing apparatus has the following drawbacks.

(1) It takes time from the start of image input to the image display.

(2) Since program control is required to transfer image data from the image input/output memory to the image display memory, other controls cannot be performed during the transfer time.

The present invention is proposed in view of such disadvantages.
The purpose is to propose an image processing device that can display images sequentially even while reading images.

Another object of the present invention is to propose an image processing device that can shorten the time from the start of image reading to display.

Another object of the present invention is to propose an image processing device that eliminates the need to interrupt other controls by eliminating the need to transfer read image data from an image input/output memory to an image display memory.

[Means for Solving the Problems] These problems require an image reading section that reads an image of a document using a photoelectric conversion means, an image output section that outputs the read image information, and an image reading section and an image output section. a first image storage section that develops image information to be input and output; a second image storage section that develops image information to be displayed on the image information display section; This is achieved by an image processing apparatus characterized by comprising a write control means for simultaneously writing image information read by the image reading section into the first and second image storage sections.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of an image processing apparatus including an image data output control section of this embodiment.

In the figure, 1 is a control unit that controls image data output for creation, editing, and printing of document data, and 2 is an image storage unit that stores images in recording materials according to image data (image data) sent from the control unit 1. , for example, a printer such as a laser beam printer. 18 is a document reader that converts the document into an electrical signal as image information, and 3 is a CRT display section that displays document data and the like.

In the control unit 1, 5 is a CPU, which performs main control of the image processing device. 6 is a ROM, which stores a document processing program executed by the CPU 5 or a control program shown in FIG. 7 is a RAM, which the CPU 5 uses as a work area. The RAM 7 also stores document data (character code data) before being developed for printing or display.

(image data, etc. read by the document reader 18) is temporarily stored. A floppy disk (FD) 8 stores various document files as an external storage device. A keyboard (KBD) 4 provides various control commands in addition to creating and editing document data. 13 is a CRT interface (CRT I/F), which controls the CR7 display section 3;

A video RAM (VRAM) T 20 stores image data for CRT display. The VRAM 20 has a random access port (VRAP) 15 that can access word data randomly from the CPU 5 side, and a serial access port (VSAP) 1 that can access serial data that is output to the CRT 3 via the CRT interface 13.
6. 14 is a system bus of the CPU 5. Furthermore, 19 is an image memory section, into which image data from the document reader 18 is input. Further, image data for printing is developed by the CPU 5, and the developed image data is serially read out in accordance with timing signals from the image printer.

The image memory unit 19 of this embodiment is configured with a dual port memory, and includes a random access port (IRAP) that allows word data to be randomly accessed from the CPU 5 side.
) 9, the document reader 18, and the image printer 2, a serial access port (IS
AP) 10. Similarly, the video RAM 20
It consists of a dual port memory, with a random access port (VRAP) 15 that randomly accesses word data from the CPU 5 side, and a serial access port (VSAP) that can access serial data output to the CRT 3 via the CRT interface 13. )16
Equipped with

FIG. 2 is a diagram showing the timing of image data transfer from the serial access port 16 of the video RAM 20 to the CRT 3. Serial access boat 1 during the display period
Image data for display is sequentially output from 6 onwards. However, during the blanking period, the output of this display image data is stopped. That is, even if the CRT 3 is in a constant display state, the VSAP 16 is in a stopped state during the blanking period. Even if the video RAM 20 is accessed during this blanking period, there is no flickering on the screen at the bottom, so there is no need to consider deterioration in display quality. During the display period, the data switching circuit 17 connects the VSAP 16 and the CRT interface 17.

Next, the operation of inputting image data from the document reader 18 will be explained. When the document reader 18 is activated for reading operation, the read image data is transferred in synchronization with the blanking period. The image data output from the document reader 18 is transferred to the ISAP 10 in the image memory 19 and the data switching circuit 17 via the input/output I/F 12. In ISAP 10, sequentially input image data is serially input and the image is developed into IRAP 9.

On the other hand, the data switching circuit 17 connects the CRT interface 13 and VSAP 16 during the display period, but in the blanking period, disconnects the CRT interface 13 and connects the input/output interface 12 and VSAP 16.
Connect. This allows image data from document reader 18 to be input to VSAP 16 during the blanking period. The image data serially input to the VSAP 16 is sequentially expanded to the VRAP 15, and is written to the VRAM 20 when a word is formed, for example. VSAP
16 is in output mode during the display period, and the document reader 18
When inputting image data from , mode switching is performed as an input mode.

FIG. 3 is a flowchart showing the above-mentioned image data input operation. The operation will be explained below according to the flowchart.

The operation starts in step S1. In step S2, the document reader 18 is activated. In step S3, it is determined whether there is a blanking period. If it is not the blanking period, it loops and waits until the blanking period. If it is a blanking period, proceed to step S4;
Input image data into VSAP 16. Step S5
At , it is determined whether input of all image data has been completed. If input of all image data has not been completed, the process returns to S3 and repeats the operation. If input of all image data has been completed in step S5, step S5
Proceed to step 6, and the operation ends.

In the above embodiment, a dual port memory was used as the image memory. This is because it is easy to transfer data between random ports and serial ports, and it is easy to input and output serial data. However, the present invention is not limited to the above embodiments. For example, an image memory section that achieves the same effect can be configured using a normal single-board memory.

[Effects of the Invention] As explained above, since image data from the document reader is input from the serial port side of the video RAM during the blanking period of the display section, screen flickering and display quality can be avoided even during image reading. The scanned images can be displayed sequentially without dropping the image. Moreover, since the read image is input into the video RAM in accordance with the blanking period, there is an effect that the time from the start of image reading to the display can be shortened. Furthermore, since image development for display requires almost no programmatic control, it has become possible to allocate the CPU to other control operations.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram of an image processing apparatus equipped with an image data input/output control unit according to the present embodiment, FIG. 2 is a diagram showing the timing of transmitting images for CRT display, and FIG. 3 is an image of the present embodiment. 5 is a flowchart of memory transfer control. In the figure, 1...control unit, 2...image printer, 3...
・CRT, 5...CPU, 12...I/O I/F,
13...CRTI/F, 17...Data switching circuit,
18... Manuscript league, 19... Image memory section, 20
...Video RAM.

Claims (1)

[Claims] (1) An image reading unit that reads an image of a document using photoelectric conversion means; an image output unit that outputs the read image information; and an image output unit that develops the image information input and output to the image reading unit and the image output unit. a first image storage section; a second image storage section that develops image information to be displayed on the image information display section; An image processing apparatus comprising: write control means for simultaneously writing to first and second image storage units.