JPS61107478A - Image data processing device - Google Patents

Abstract

PURPOSE:To permit an image processing between any image devices by providing a density conversion mechanism for desired resolution, and an enlargement and reduction mechanism for desired image sizes. CONSTITUTION:When a main processor receives an image from a higher system and develops it in an image memory 24, the processor sets in advance the data regarding its resolution, enlargement or reduction conversion, its magnification in a data conversion division 30, and develops the image in a memory 20 based on those parameters. If the data developed in the memory 20 is output to a printer 73, for example, the processor 10 sets in advance the image characteristics in a data conversion division 40, and causes the printer 73 to output the data sequentially.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image data processing apparatus used in a system having an input/output device for image data.

- [Technical background of the invention and its problems] In recent years, various image devices such as image scanners and image printers have been developed and put into practical use. With the spread of these various image devices, the resolution (density) of each device
There are also various types. If the resolution is different, images with the same number of pixels will appear to have different sizes. Therefore, in order to make the size the same between devices, that is, to perform density conversion, conventionally, each device is connected to the image input device such as an image scanner, and the support is to the image output device such as an image printer. In order to obtain the same size, we have performed pixel number conversion, that is, density conversion, etc.

However, nowadays, facsimile machines are connected to computer systems, network mechanisms have been developed, and many popular image devices are connected to the system.

In this case, if the previous configuration had a density conversion function in each device, the controllers of all the image devices connected to the system would have to have their own density conversion mechanism, which would complicate the overall system configuration. The problem arises that it leads to high costs.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and is an image conversion process that includes density matching between arbitrary image devices without providing each image input/output device with image conversion functions such as density conversion, enlargement/reduction conversion, etc. An object of the present invention is to provide an image data processing device which can effectively perform the following image conversion using a common image conversion mechanism.

“ [Summary of the Invention] The present invention provides a density conversion mechanism for density-converting an input image having an arbitrary resolution into an image having a desired resolution on an image memory in a two-dimensional bitmap format to obtain an output image; By realizing an image data processing device Ltk having an enlargement/reduction mechanism for obtaining a desired image size, any image can be processed without having image conversion functions such as density conversion, enlargement/reduction conversion, etc. in each image input/output device. Image conversion processing, including density matching between devices, can be effectively performed using a common image conversion mechanism, making it possible to build a system with multiple image devices at low cost, as well as Devices can be made flexible and any desired system can be easily constructed.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to all the drawings. In the figure, 10 is in charge of controlling the entire device: a main processor, and 10 is the main path of the main processor O. 20ij two-dimensional form (X.

image memory (accessed by Y coordinate), 21
is an image memory path to which write/read image data of the image memory 20 is transferred. Reference numeral 30 denotes an input image data conversion section, which includes an image input port 3, an image data decoding section 32, a conversion control section 33 for controlling conversion of density and enlargement/reduction, and the like.

An input image (from the upper system) via the main path 10f and an image from the image scanner 63 are input to the image input port 31. Further, the image data decoding section 32i11. , if the image attribute is a compressed image, it is expanded to an uncompressed image. Further, the conversion control unit 33 converts the number of pixels of the uncompressed image using a reduction/enlargement circuit, and controls writing to the image memo IJ 20.

Further, 40 is an output image data conversion section, which includes a conversion control section 41, an image data encoding section 42, and an image output yt.
? - 43 etc. The conversion control unit 4 reads the image stored in the image memory 20, obtains an image with a desired resolution, and performs attribute image processing to obtain a reduced/enlarged image. or,
If the desired image attribute is a compression format, the image data encoding unit 2 encodes the data generated by the conversion control unit 41 in the corresponding compression format. Also, image output cuff β-to 43
performs image output control to output the image obtained by the image data encoder 42 to the upper system via the main path 10 or to the 7' IJ printer side.

Reference numeral 50 denotes a higher-level system interface section, which receives and receives commands and data from the higher-level system, and performs control for sending status and data to the higher-level system.

51 is an upper system interface line connected to an upper system. Reference numeral 60 denotes an image scanner interface section, which is not essential for the image processor, but is an interface section when the image processor has a directly connected device. 61 is the image scanner interface section 60→
The scanner image data path 62 between the image input ports 31 is an image data signal (including control) inputted from the scanner device 63. Reference numeral 63 denotes a scanner device that performs image reading and scanning based on Ea of the image scanner interface section 60.

Reference numeral 70 denotes an image printer interface section, which is an image printer interface section used when an image created on the image memory 20 is outputted to the printer device 73 in the essential development information. 71 is image output port 43 → image output data/gas of image grid 7 interface, 72 is image output/4
(including controls). Reference numeral 73 denotes a printer device that executes printing processing under the image printer interface section 7001. 80 is a character generation unit which receives all character codes from the f maison processor IO, generates a character image, and develops it on the image memory 2θ. Character processing methods include reduction/enlargement, rotation, etc. 90 is a figure generator, and the main processor 10
A graphic code is received from the controller, a graphic image is generated, and the image memory 2011CH is opened. In addition, image memory 2
Image expansion to 0 is performed using read mode/OR superposition mode, etc.

Here, the operation of one embodiment will be explained.

1) When receiving an image from the upper system and developing it on Image Memo+720, the flow of image data in this case is as follows:
1 → Upper system interface section 50 → Main path 1
1 → input chimazo data conversion unit 30 (image input boat 31 → image data decoding unit 32 → conversion control unit 33)
→ image memory path 21 → image memory 20], and the image data manually input from the host system is developed on the image memory 20. The image attributes at this time are i, -, □yo (MH.MR, 3, i, -7
(□゛Resolution, image development position, image size, density conversion, reduction/enlargement conversion, and their magnification, etc. are different, and the main glossary flO is the input image data converter 3.
Set up each part of 0 in advance. Further, each conversion formula at this time is shown below.

”wDp/Dw m++・＋・(1) However,
D,; Image memory resolution % DW; Incoming image memory (upper system) resolution, RW: Reduction/enlargement magnification (when expanded)
It is.

2) When sending the image developed in the image memory 20 to the upper system, the flow of image data at this time is [Image memory 2
0→image memory path 21→output image data converter 40 (conversion controller 41→image data encoder 42→
The image data read from the image memory 20 is transferred to the upper system. The image attributes at this time (substantially the same as in case 1) above) are also set up in advance in each part of the output image/zo data conversion section 40 by the main processor 10, as in case 1) above. Moreover, the density magnification conversion formula at this time is shown below.

RRDR/DP ・・・・Song (2)・However, D
, : Same as equation (1), Dw: output image (upper system) resolution, Ri: reduction/enlargement magnification (at the time of reading).

A specific circuit for the image density conversion method (reduction/enlargement method) is described in detail in Japanese Patent Application No. 180140/1983.

3) When outputting the image on the image memory 20 to the printer device 73, the flow of image data at this time is as follows:
θ → image memory path 21 → output image data converter 40 (conversion side (goods) unit 41 → image data encoder 4
2 → image output port 43 or conversion control unit 41 → image output port 4s) → data file 1 → image printer interface unit 70 → data file 2 → printer device 73], and the image The image data successively output from the memory 20 is transferred to the printer device 73. In this case, as in the case of 2), the main processor 10 outputs the image data from the output image data converter 4.
Set up each part of 0 in advance. The density magnification conversion method at this time is shown below.

RoDo/DP・−・−(3) However, D, ; same as equation (1), Do: pre/re resolution, R
o: Reduction/enlargement magnification (image memory→glinter).

Note that during the above transfer, the image data encoder 42 is generally sent to the printer as uncompressed data.
is bypassed.

4) When developing the image from the scanner device 63 on the image memo IJ 20, the flow of image data at this time is [scanner device 63
→Image i4 bus 62 →Image scanner interface section 60→Data bus 61→Input image data conversion section 30 (image input port 31→Image data reconnaissance section 32→Conversion control section, V3)→Image memory path 21
→image memory 20], and the image read by the scanner device 63 is developed on the image memory 20. The image attributes at this time are also set up in each part of the input chimeno data converting section 3o by the main processor 1°, as in the case of each data transfer described above.

In addition, at the time of the above-mentioned transfer, since the image data from the scanner is generally an uncompressed image, the image data decoding section 32 is bypassed.

5) Parallel operation The data transfers in 1) to 4) above can be performed in parallel, which allows the following image data transfer between devices.

(a) Entire host system re/re/device 73 In this case, the above 1), 3), and ``''-1 transmission are performed in parallel.

(b) Scanner device 63 → host system In this case, the data transfers of 4) and 2) above are performed in parallel.

(c) Upper system→image memory 2° In this case, the data transfers of 1) and 2) above are performed in parallel.

2) Scanner device 63→image memory 2°→glinter device 73 In this case, the data transfers of 4) and 3) above are performed in parallel.

Image data processing device at according to the present invention as described above
By providing the image sensor between the input and output devices, an increase in cost on each input/output device terminal side can be avoided, and the system as a whole has a large cost advantage. In addition, even if the devices directly connected to the image processor have different resolutions, such as a scanner and a printer, it does not pose a problem at all because the same image is created through internal density conversion.
Flexibility in device selection, cost savings in this aspect
The benefits in performance are huge. In addition, since it is possible to operate in two parallels for the image input system and the output system, it is also excellent in terms of speed performance.

〔Effect of the invention〕

As described in detail above, according to the present invention, a density conversion mechanism obtains an output image by density-converting a human-powered image with an arbitrary resolution into an image with a desired resolution on a two-dimensional bit Mazda format image memory. By realizing an image data processing device having an enlargement/reduction mechanism for obtaining a desired image size, arbitrary image data processing can be performed without requiring each image input/output device to have an image conversion function such as density conversion, enlargement/reduction conversion, etc. Image conversion processing, including density matching between image devices, can be effectively performed using a common image conversion mechanism.This makes it possible to build a system with multiple image devices at a low cost, and also allows the image devices to be connected to Flexibility can be given to the system, and any system can be easily constructed.

[Brief explanation of the drawing]

The figure is a block diagram showing one embodiment of the present invention. 10... Main processor, 20... Image memory, 30... Input chimeno data conversion section, 3...
Image data decoding unit 1. 'i3... Conversion' control section, 40... Output image data conversion section, 41... Conversion control section, 42... Image data encoding section, 43... Image data encoding section,
50... Upper system interface m, 51.
... Upper system interface line, 60... Image scanner interface section, 63... Scanner device, 70... Image sensor interface section,
73... Glinter device, 80... Character generation section, 90
...Figure generation part.

Claims (1)

[Claims] an image memory in a two-dimensional bitmap format for storing input image data having a resolution attribute; and a data reception unit for receiving data input from an external device including an image input device;
and an input image data converting unit having a decoding unit for the image data inputted through the receiving unit, and a converting unit for executing density conversion and enlargement/reduction conversion with respect to the image memory. and conversion means for density conversion and expansion/reduction conversion of the data read from the image memory, compression encoding means for the data, and data sending for sending the data to an external device including an image output device. 1. An image data processing device comprising: an output image data converting section having an output image data converting section;