JPH04116773A - Electronic filing device - Google Patents

Abstract

PURPOSE:To reduce a picture memory capacity by reading binary picture data stored in an external storage device via a buffer and compressing binary picture data in the buffer for displaying it in a screen so as to transfer it to a picture memory. CONSTITUTION:A picture data compression processing part 2 compresses a binary picture on the buffer 4 so that it can be displayed on the screen, sets it in the picture memory 5 and judges whether a picture read part 1 terminates converting a whole document into the binary picture or not. When it is converted, a picture enlargement/reduction processing part 3 enlargement- processes the binary picture in the picture memory 5 and sets it in a buffer for picture output 6 if a mode is enlargement by the enlargement/reduction mode designated by different input/output. If the mode is reduction, the binary picture in the picture memory 5 is reduction-processed, and it is set in the buffer for picture output 6. If the mode is nonmagnification, the binary picture of the picture memory 5 is set in the buffer for picture output 6 as it is and it is displayed in a display part 8. Thus, the picture memory capacity can be reduced.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is capable of reading documents/images and storing them in an external storage device as binary image data, or of reading documents/images stored in an external storage device. This invention relates to an electronic filing device that searches and displays or prints.

(Prior art) - A conventional electronic filing device was developed by Japanese Patent Publication No. 58-5378
Publication No. 1 states: [The image reading section operates the document and converts it into a binary image consisting of mXn pixels, this binary image is written into the image memory under the control of the writing circuit, and the image enlargement/reduction device converts the document into a binary image consisting of mXn pixels. Using the binary image in the memory as the original image, a scaled converted image is created and stored in the output buffer.

'', all data of the converted binary image is written into the image memory, and this entire data is used as the original image to create a scaled converted image.

(Problems to be Solved by the Invention) However, the above-mentioned conventional electronic filing devices are mainly expensive systems, and it is necessary to reproduce complete document/image data when displaying enlarged/reduced images or when editing images. Therefore, it is necessary to minimize the loss of original image data immediately after image reading, and a large capacity memory is required to hold all data of the original image immediately after image reading in memory.

On the other hand, low-cost systems do not have functions such as editing images, and there is no need to reproduce complete document/image data on the screen. In other words, as long as it can be determined on the screen whether or not the document/image data is the desired one, some data omissions are acceptable. Therefore, even though there is no need to install a large capacity memory to hold all the data of the original image immediately after the image is read,
By using a device similar to the above system, there is a problem in that a large capacity memory is installed, making the system expensive.

The present invention is intended to solve these problems, and aims to reduce the memory capacity and realize a low-cost system.

(Means for Solving the Problems) In order to achieve the above-mentioned problems, the present invention includes an image reading section that reads binary image data stored in an external storage device into a buffer, and a screen that reads the binary image data stored in the buffer. Number to display: The image data compression processing unit compresses and transfers it to the image memory, and the image data in the image memory is compressed and transferred to the image memory at the same size.
Alternatively, it may include an image enlargement/reduction processing section that reduces the image, transfers it to an image output buffer, and displays the image.

(Function) Therefore, according to the present invention, binary image data stored in an external storage device is read via a buffer, and the binary image data in the buffer is compressed and transferred to the image memory for display on the screen. Therefore, the image memory capacity can be reduced.

(Embodiment) FIG. 1 shows a block configuration of an electronic filing device in an embodiment of the present invention. In FIG. 1, 1 is an image reading section, 2 is an image data compression processing section, 3 is an image enlargement/reduction processing section, 4 is a buffer, 5 is an image memory, 6
7 is an image output buffer, 7 is an image output control section, and 8 is a display section.

FIG. 2 is a flowchart showing the operation of the electronic filing device in one embodiment of the present invention.

Next, the operation of the above embodiment will be explained using FIGS. 1 and 2. In the above embodiment, the image reading unit l
operates the document, converts a predetermined area into a binary image, and sets it in buffer 4 (Sl). Next, the image data compression processing section 2 compresses the binary image on the buffer 4 so that it can be displayed on the screen and sets it in the image memory 5 (S□). Next, it is determined whether the entire document has been converted into a binary image by the image reading unit 1 (S,), and if the conversion is not completed, the above (S,
).

Repeat (S,), (S,). Once the conversion is complete (
(S, -YES), the image enlargement/reduction processing section 3 enlarges the binary image in the image memory 5 in accordance with the enlargement/reduction mode specified by another input means (not shown) in the enlargement mode. In the reduction mode, the binary image in the image memory 5 is reduced and set in the image output buffer 6, and in the same size mode, the binary image in the image memory 5 is output as is. Set it in the image output buffer 6. The contents of this image output buffer 6 are displayed on the display section 8 under the control of the image output control section 7 (S,).

(Effects of the Invention) As is clear from the above embodiments, the present invention includes an image reading unit that reads binary image data stored in an external storage device into a buffer, and displays the binary image data in the buffer on a screen. an image data compression processing section that compresses the image data and transfers it to the image memory; and an image enlargement/reduction processing section that compresses the image data in the image memory or reduces it and transfers it to the image output buffer and displays the image. With this configuration, the binary image data stored in the external storage device is read via the buffer, and the binary image data in the buffer is reduced and transferred to the image memory for display on the screen, so the image memory capacity is reduced. This has the effect of making it possible to reduce the cost of the system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an electronic filing device according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of the electronic filing device according to an embodiment of the present invention. l...image reading unit, 2...image data compression unit,
3... Image enlargement/reduction processing unit, 4... Buffer,
5... Image memory, 6... Image output buffer,
7... Image output control section, 8... Display section. Patent applicant: Matsushita Electric Industrial Co., Ltd. Agent Koji Hoshino

Claims (1)

[Claims] an image reading section that reads binary image data stored in an external storage device into a buffer; an image data compression processing section that compresses the binary image data in the buffer and transfers it to the image memory for display on a screen; It has an image enlargement/reduction processing section that transfers the image data in the image memory to the same size or reduced size to the image output buffer and displays the image, and it is possible to display the image with a relatively small memory capacity. Characteristic electronic filing device.