JP2003036445A - Image processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform image processing of a document composed of a plurality of different image elements without deteriorating a certain particular image element. SOLUTION: An image processor is provided with a data communicating part 12 for inputting a PDL(page description language) file having image elements of a plurality of different types of space resolutions and gradation resolutions, an image expanding part 13 for interpreting and expanding a PDL file and also generating a tag bit showing an image element, an image data converting part 15 for converting the expanded file into image data corresponding to space resolutions and gradation resolutions required by the image data, memories 18a to 18d for an image for storing the image data, a tag bit memory 19 for storing the tag bit in a coordinate space being the same as that of the image data, an interface 20 for an image for reading and outputting the stored tab bit and image data while made to correspond to the coordinate space, and image processing parts 32 to 37 for performing image processing following the outputted tag bit of the outputted image data.

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a personal computer for DTP.
Etc., PDL and other image data formats
Can be reproduced with high quality.
It relates to a possible image processing device. [0002] 2. Description of the Related Art (Background) Recently, multimedia and DTP
(Desk Top Publishing) Technological advances in office
Very complex and precise
Documents are being created. And
This kind of document is faster, higher quality,
The demand for easier output has increased
In the meantime, various image processing devices have been developed.
You. Such an image processing apparatus uses a PDL (Page Description).
 Language: page description language)
Event files via various standard interfaces
And interpret it, and faithfully reproduce it on the target image forming apparatus.
The processing for realizing this is performed. Image forming device and
In general, electrophotographic image forming
It has been known. Recently, a color electrophotographic system has been developed.
PDL is remarkably popular with printers, etc.
In image processing devices that interpret document files
Some of them have been announced for color printers
I have. Their basic structure is a PDL document file.
Image expansion means for interpreting the file and performing expansion processing;
And a multi-valued full-page image memory.
A raster image is temporarily formed in the image memory,
It is a method of sending to the data. Here, the image memory is, for example,
400 dpi (dot / inch) resolution, A3 size (420 m
Assuming one page of image data of m × 297mm),
Is 4 megabytes, and 1 pixel is multi-valued 8
In terms of bits, 32 MB capacity is each
is necessary. Further, in the case of a color image, K (black),
Y (yellow), M (magenta) and C (cyan)
Since each page of 4 colors is required, 128 MB
Such an enormous capacity is required as an image memory. Generally, an image having a binary image memory
When developing / generating multi-valued images using a processing device
Area gradation method such as halftone dot, dither or error diffusion method
Often used. Image forming equipment that handles multi-valued images
By expressing one pixel with 8 bits, 2
Image forming apparatus having 56 gradations and handling color images
, K (black), Y (yellow), M (magenta)
) And C (cyan) are each composed of 8 bits.
Typically, it is treated as 32 bits per pixel
It is. (Resolution) In recent years, DTP
Various inputs due to advances in hardware / software technology
Devices (scanners, video still cameras, etc.)
With the advent of a text editor, various spatial resolution
Or image elements with gradation resolution in one document
(1 page)
Messy, advanced and various spatial or tonal resolutions
Document that combines image elements with
It has come to be. Here, the image element is similar
Image blocks classified by data having
For example, character / line drawing area, graphic area, and natural image
It can be divided into an image area. [0007] And complex, advanced, and various spaces
Documents with resolution or gradation resolution are also PDL
Can be easily expressed and generated as a simple file
It is also possible. Hey when creating a PDL file
Various different spaces contained in the document
Resolution and gradation resolution are agreed by PDL.
In a unique logical coordinate space independent of input / output devices.
Is described. On the other hand, in image processing devices, those
Interpret the PDL description and convert the image
Expansion processing with spatial resolution and gradation resolution of image memory
Perform Normally, the spatial resolution at which
Tone resolution is the intended image forming device such as a printer
Are the same as the spatial resolution and the gradation resolution. When handling color images, etc.,
Requires a huge amount of image memory
An image processing method using a quantity compression method has been proposed.
Proposals of this type include, for example, JP-A-4-87460.
Some are listed. In the system described in this publication,
Basically, to reduce memory, DCT (Discrete
 Cosine Transform)
JPEG (Joint Photographic Experts Group)
An image compression method is employed. In addition, DCT
In image compression methods such as JPEG, such as characters / line drawings,
Areas requiring high spatial resolution and natural images
Compression is effective for areas requiring high gradation resolution of halftone images.
There is also a problem that the rate and image degradation will differ
Therefore, the technology described in the above publication proposes a solution to this problem.
Is also taking place at the same time. [0009] Japanese Patent Application Laid-Open No. 4-63064 discloses the same.
/ Line drawing area that can be binarized as a method to solve various problems
Area is treated as a binary image and encoded using MMR coding.
And natural image areas are encoded by DCT, and each area
Are expanded or stored in separate image memories.
No, merge them on output and get the desired image shape
Compression efficiency by outputting to
An image processing device capable of obtaining a good image has been proposed.
ing. Further, a character / line image area and a natural image area
In both cases, spatial resolution and gradation resolution are basically
High resolution for character / line drawing area due to the opposite relationship
Degree binary image memory and low resolution multi-level image memory
When output, it is stored in each image memory.
Good by merging and outputting selected image data
Technology that can obtain complex images and reduction of image memory
Several methods have been proposed for
You. (About color space)
With various color spaces due to technological advancement
Import elements into one document (one page)
More complex, advanced and different colors
A document with a space image element is created.
It has come to be. For example, in one PDL, CIE
Base color space (CIE1931 (XYZ) sky
XYZ between, CIE1976 (L^*a^*b^*) L of space^*a
^*b^*, RGB in calibrated RGB space, etc.)
SKYMC and other special color space image elements
Into a one-page document.
is there. Here, different PDL files are used.
When capturing an image element with a color space
All CIE Sanashi for CIE based color base
Converted to the extreme XYZ color space,
For other color spaces
Imported into a one-page PDL file. Normally, a one-page PDL file is
Image elements with multiple different color spaces
If there is, the conventional image processing device is aimed
The same color space as the color space of the image forming apparatus
A process for converting to a pace is performed. At this time,
For example, a general device R
The complete conversion process from GB to device KYMC is as follows:
They are expressed by the following formulas, and
Is [0014] (Equation 1) In these equations, BG (k) and UCR
(K) means Sumi version synthesis function and UCR function, respectively.
These functions are provided by the target image forming apparatus.
It differs depending on the characteristics. The colors shown in these equations
Various operations in the space conversion processing and comparison processing
Row for each pixel for every image pixel that
Be done. Further, the image data is input by different image input devices.
A document having a plurality of input image elements
Can be easily expressed using PDL,
Can be generated. When generating a PDL file
In addition, image elements input by different image input devices are:
It is determined by PDL and is independent of I / O device.
Converted and described in color space and format
You. And in the image processing apparatus, those PDLs
The description is interpreted and the image memory of the image processing device is
Expansion processing is performed at spatial resolution and gradation resolution.
You. As described above, in the image processing apparatus, the image development processing
In processing, a device that depends on the device
Color space conversion and color matching
Get a color output image that faithfully reproduces the input screen
Various processes are performed. As a well-known technique of such processing, for example,
For example, there is one described in JP-A-3-282965.
The technology described in this publication is based on an input device such as a scanner.
The input image element is converted to an RG depending on the input device.
B as color space image data.
Tristimulus values independent of the input / output device for the image data obtained
XYZ, then the CIE1976 L^*a^*b^*
To gamut matching / color matching
Y required to perform image processing and perform image formation.
Ink amount for each color such as M and C, base for K (black) generation
Generate and calculate the amount of removal and the amount of inking, etc.
Image that faithfully reproduces the color of the input screen
This is to obtain an image output. The same applies to the specific PDL described above.
The concept of color matching is performed. sand
That is, image input / output / generation / editing of host computer, etc.
PDL file for image formation in the collector
When generating an image, the host computer
Input device-dependent color space is device-dependent
Are converted to CIE-based tristimulus values
File is generated, while the image processing device side
When developing / generating, CIE-based color
Refers to the rendering dictionary and does not depend on image input / output.
Color space depends on the image input / output device.
Color space conversion process and color converted to source
A matching process is performed. This allows each image
Faithful color of input image without depending on output device
A reproduced output image can be obtained. Recently, each DTP software maker has
Perform color matching in the same way
For the purpose, a color management system called color management system
Various switching framework software are provided
It has become. Such a color management system
The frame software itself has a device profile
Information called the image input / output device
This information allows devices of various image input / output devices
Device-dependent color space
(Eg CIE 1976L^*a^*b^*Or XYZ)
Convert to color space and vice versa
It has become. Here, the color management system
Is an image input / output device based on the device profile
Image data input / output from various image input / output devices
Convert to a device-independent color space
By performing output processing, between each image input / output device
To easily perform color matching processing with
is there. [0023] [Problems to be Solved by the Invention]
Title) However, such a conventional image processing apparatus basically has a P
When performing expansion processing by interpreting DL,
Space inherent in the image processing device or image forming device
Expansion processing can be performed only at the resolution and the gradation resolution. That
With the unique spatial resolution and gradation resolution of the image processing device
Image data that has undergone expansion processing is all a single spatial solution
Printer and other resolutions for image resolution and gradation resolution
Supplied to the target image forming apparatus, and
Various image processing is performed or nothing is performed
Then, an image is formed. As described above, the image constituting the document
Image elements are character / line drawing area, figure area, and natural image
Can be divided into regions and each image element
The required spatial resolution and gradation resolution are different. An example
For example, high spatial resolution is required in the text / line drawing area
But in most cases it is expressed as binary
Therefore, a low gradation resolution is sufficient. Also, in the figure area
Low in the sky due to the high probability that the same
Can be expressed in terms of the spatial resolution, and the spatial resolution is
Image formation including image processing devices or printers
Very low than the spatial resolution of the device and
Can be expressed in binary in the case
No. On the other hand, for a halftone image such as a natural image,
Resolution is required, high spatial resolution is not required, and
High resolution is oversampling and image quality
Since it deteriorates, a medium spatial resolution is sufficient. Originally, as described above, the requirements differ from each other.
Image elements with different spatial and gradation resolutions
To form high quality images in the true sense
Is the attribute of the image element from the image processing device to the image formation stage
Is saved, and the desired image,
Data is sent to the image forming device, and
Images that depend on each image forming device
An image or image formation should be performed. For example, in a natural image read by a scanner,
Small characters of 7pt (point) or less and other line drawings
In cases where it is included, conventional image processing
In the text area image and the natural image area image
Image forming devices such as printers that store attributes
Can not tell. For this reason, an image forming apparatus is an example.
For example, 200/400 line drawing of two types of line screen
Even if the printer has functions,
Image formation with a single 200/400 line
In the case of 200 lines fixed, the outline of the character is sharp.
Or halftone characters are a little blurred
In the case of 400 lines fixed,
Means that the natural image area is oversampled
And the reproducibility of halftone generally deteriorates
Problem. In recent copiers / printers, etc.,
Specify an area in a document and
How to switch or perform various different image processing
There are some thoughts. However, these
As described above, the character area and the natural image area overlap.
If there are any physical restrictions (such as
Amount of memory for specifying
Cannot be specified. (Problem Concerning Color Space)
In conventional image processing devices, PDL is basically interpreted and expanded
When performing processing, all image data must be processed.
It has an image processing device or image forming device
Must be converted to a specific color space,
The color space conversion process at this time took a very long time
Problem. Here's an example of this problem
I will explain it. Color of various graphic elements described in PDL
And color space in most cases,
In the PGB color space, using a color palette, etc.
The color is specified, and for one image element,
The color hardly changes. Thus, for example, 1
Percentage of each image element in the page document
If is small, color space conversion processing and expansion
You don't spend much time on the process. However, almost one-page document
The nature of a raster whose entire surface is read and input by a scanner, etc.
In the case of an image, when the image is developed, almost one page
Perform color space conversion processing for all pixels
One page document to have to do
It takes an enormous amount of time to develop the image
The performance of the device is reduced. For example, if the resolution is 400 dpi,
Image memory required for one page of A3 size is two
The value is as large as 4 megabytes, but one pixel is multi-valued 8bi
t requires 32 Mbytes each. Further
In the case of a color image, four of K, Y, M, and C
128 megabytes in total to require color pages
Enormous image memory is required. In this case
And the document to be processed is
The color space conversion process described above.
Need to perform 128 million (mega) operations
There is. In addition, the conventional image processing apparatus described above
Basically, when interpreting PDL and performing expansion processing,
Color matching for fixed image input / output devices
Only processing can be performed. Because of this, one throb
Input by a different image input device into the
And image data depending on the image input device is included.
In some cases, for a given image input / output device
Color matching is performed for each image element
Cannot perform different color matching processing
It is. Further, the processing corresponding to the above-mentioned specific PDL is performed.
In a physical device, different
Includes multiple image elements input from image input device
Even if the color rendering term for the image input device
By attaching the letter, the color matching process
It is not possible to do it differently for each image element
is there. However, these color matching processes
-Only polynomial operation methods are provided as matching operations
Not perform high-precision color matching
I can't. For high accuracy, all color
It is necessary to have a pace conversion table, this
Increases the file size and waste increases.
And all processing is performed by software.
Immense time for the color matching process
You need. On the other hand, a color management system is called
Color Matching Framework Software
But only simple color matching calculation processing is provided.
There is no need to perform high-precision color matching processing
Can not. For this reason, the processing device corresponding to the specific PDL is used.
As with placement, all color spaces are required for high accuracy.
Needs to have a translation table for
This leads to an increase in file size and waste increases.
All the processing is done by software,
Therefore, the color matching process takes an enormous amount of time.
Would. The present invention has been made in view of the above circumstances.
The goal is to produce higher quality images.
To provide an image processing apparatus capable of performing image formation.
And there. [0036] Means for Solving the Problems The above-mentioned problems are solved.
For this reason, the present invention provides a file described in a predetermined format.
Files with different spatial resolutions and floors
Input method for inputting a file having image elements of tonal resolution
Interprets and expands the file, and
Expansion means for generating plural types of attribute information for classifying elements
And the file expanded by the expansion means
Images corresponding to the spatial resolution and gradation resolution required by the element
Image data conversion means for converting the image data into data;
Image data storage means for storing the attribute information;
Attribute information stored in the same coordinate space as the image data
Storage means and the attribute stored by the attribute information storage means
Information and images stored by the image data storage means.
Image data that is read and output in accordance with the coordinate space
Data output means, and data output by the data output means.
The image data is output by the data output means.
Image processing device that performs image processing according to the attribute information
And a step. [0037] According to the present invention, the input means allows the predetermined
A file written in a different format
Has several spatial and gradation resolution image elements
File is input, and then this file is extracted
Interpretation / decompression and classification of image elements
Are generated. Further expanded
The image file is converted by the image data conversion
Image data corresponding to the spatial resolution and gradation resolution required by
Is converted to data. The image data and the attribute information
Stored in image data storage means and attribute information storage means respectively
On the other hand, the data output means
Read and output. Then, the image processing means
Image processing according to the attribute information at the time of
Perform for [0038] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Will be explained. (First Embodiment) An image processing apparatus according to the first embodiment
Image data processing device 1 and image forming processing device 3
It is. Therefore, first, the image data processing apparatus 1 will be described.
I will tell. (Configuration of Image Data Processing Apparatus) FIG.
A block diagram showing the configuration of the image data processing apparatus 1 according to one embodiment.
It is a lock figure. In this figure, reference numeral 12 indicates a data communication.
Shinbe, a document written in a specific PDL
File (hereinafter simply referred to as "PDL file")
input. This PDL file is stored in the host computer
11. Symbol 13 is image development
Part, performs image expansion processing and solves the PDL file.
To create an object list for each image element.
It should be noted that the image developing unit 13 performs
Refers to the data stored in the font memory 14
Perform font expansion processing. Here, the object list is
Which position in the image coordinate space of the image data processing device 1
Whether each object (image element) exists in
In addition, what kind of composition of the image element and what kind of
Whether the image element has attributes and what color
Is a structure that indicates whether the object has
I have. The position in the image coordinate space is, for example, (x min, y mi
n), expressed as diagonal coordinates like (x min, y max)
It can be composed of characters, rectangular shapes,
It can be represented as a circle, line, or other image element,
For attributes, characters, line drawings, nature drawings, graphic elements, etc.
The color can be represented by the image developing unit 1
Instruct the color palette that 3 has internally
These expressions are possible. Next, reference numeral 15 denotes an image data conversion unit.
The object is listed on the object list by the image developing unit 13.
Processing to expand or convert image data into various data
Do. Reference numeral 16 denotes a control circuit for controlling each unit.
Detailed operations will be described later. Reference numeral 17 denotes an image storage unit.
Yes, image memories 18a-18d, tag bit memo
It is roughly divided into ri19. The image data in this embodiment is
Is 8 bits, the resolution is 400 dpi, and the size is A
Three sizes (4 megapixels) are assumed. others
Therefore, each of the image memories 18a to 18d
Stores image data corresponding to color K, Y, M and C
However, the sum of these capacities is 128 megabytes. one
On the other hand, the tag bit memory 19 has the image memories 18a to 18a.
8d has the same image coordinate space (4 megapixels)
Tag bits corresponding to each coordinate in the memory
Is stored in the memory. Here, in the present embodiment,
A bit is a two-bit image element, as shown in FIG.
And classified into the following four types. That is, the tag
Bits are natural image area (3), graphic area (2), character
/ Line drawing area (1) and other area (0)
And categorize. Here, the numbers in parentheses are expressed in 2-bit notation.
It is shown in decimal. Reference numeral 20 denotes an image interface.
The image data is exchanged with the image forming processing apparatus 3.
Send and receive. (Classification of image data in this embodiment)
Here, with reference to FIG.
An example of classification will be described. Original image 3 shown in this figure
00 is a character / line drawing image 301, a graphic image 302, and
And natural image 303. Each image is
Image of character / line drawing area, figure area, and natural image area
Can be classified into elements. (Configuration of Image Forming Processing Apparatus)
An image forming apparatus 3 according to one embodiment will be described.
FIG. 3 is a block diagram illustrating a configuration of the image forming processing device 3.
is there. In this figure, reference numeral 31 denotes an image interface
And the data with the image data processing device 1 shown in FIG.
And interpreted tag bits
Select data. Gamma correction unit 32, color space conversion unit 3
3, filter 34, UCR / black generator 35, gradation generator
36, and each image processing unit of the screen processing unit 37,
Depending on the instruction of each tag bit, different images
Performs image processing functions for performing image processing and processes for that purpose.
LUT (Look Up Table)
You. Reference numeral 38 indicates that an image is formed according to data.
Laser driving circuit. Note that the image in this embodiment is
In image formation, electrophotography, ink jet, heat transfer
It may be a copying method or other methods. In this case,
The symbol 38 is changed as appropriate. Reference numeral 39 denotes a control unit.
Synchronous control, system control, UI in the forming processing apparatus 3
Control, image processing control, communication control, etc.
What kind of image and what tag bit
Instructions such as whether to perform processing are started by software
Instruct before. Note that the image forming processing apparatus 3
It may be of a copier type having a force device 40.
In this case, the original is R (registered) by the CCDs 41a to 41c.
), G (green), B (blue)
Rarely, these read signals are output from the A / D converters 42a to 42a.
c to a digital signal.
Correction of sensitivity variation for each pixel and illumination
The unevenness is corrected, and finally the output signal line 44a
~ 44c, with R, G, B color space
The data is supplied to the image interface 31 as data.
In this case, the image interface 31 outputs the image data.
Instead of the image data from the data processing device 1, the image input device
The image forming process is performed by selecting data from the device 40.
It is. Next, the operation of the first embodiment will be described with reference to FIG.
This will be described with reference to FIG. FIG. 5 illustrates the operation of this embodiment.
It is a flowchart for clarifying. First, the image data
The operation of the processing device 1 will be described. (Operation of Image Data Processing Apparatus)
In step Sa1, the host computer 11 creates
The generated PDL file is received by the data communication unit 12.
And interpreted by the image developing unit 13. Next step
In step Sa2, the object is interpreted by the image
A project list is generated. This generation is based on image coordinates
From the smallest (x = 0, y = 0) position between
The main scanning is performed by moving forward by one line in the (+) direction, and then x
A backward scan is performed in the y direction while moving in the backward direction, and (x = 0, y
= 1), move one line forward in the x (+) direction
After the main scan, the same scan is repeated for the object.
It is done by being returned. Thus, 1
An object is created for each line on the page. Next, the image data in the object list
The data is passed to the image data conversion unit 15, and
3 is virtually rasterized (developed) and
In step Sa4, all scan lines on one page
On the other hand, rasterized for each color of K, Y, M, and C
Is converted into a byte map, and the next step Sa5
K, Y, M and C image memories 18a to 18
d is temporarily stored. On the other hand, the image data
In step Sa7, the data converter 15
Generate tags. As described above, the image data conversion unit
15 according to the object list passed to
Locations of objects with different attributes, the objects
Can be clearly determined. Based on this information
In addition, the image data conversion unit 15
On the other hand, a dug bit generation process is performed. Tag bit
When generating the image data, the image data conversion unit 15
Data development / conversion processing, and
Know the characteristics of the element and the position where the image element exists
Thus, according to the tag bit function table shown in FIG.
As shown in FIG.
The write bit is written (step Sa8). In addition,
When image elements with different attributes overlap at the same time
In some cases, the attributes of the top-level image element
Responded. As described above, the image data conversion unit 15
Image data expansion processing to image memories 18a to 18d,
And the process of generating the tag bits in the tag bit memory 19
When completed, the image interface 20
Communication with the image forming processing apparatus
A synchronization signal is supplied via the communication / synchronization signal line 23.
Then, the image interface 20 determines in step Sa6
In the image stored in the image memories 18a to 18d.
Read the image data and perform raster decoding
At the same time, the image interface 20
It instructs the road 16 to output image data. This
In step Sa9, the image memories 18a-1
8d and the image data in the tag bit memory 19
The tag bit is used for the image
Output to the formation processing device. At that time, the image data
And the tag bit are respectively assigned to the image interface 2
0 indicates that the image data output signal lines 21a to 21d and
Image formation processing of communication partner via gbit output line 22
It is transmitted to the device 3. At this time, the image data and the tag bit are
The smallest image coordinate space of the image memories 18a to 18d
From the position (x = 0, y = 0) in the x direction for each line
The next scan is performed. Here, the image memories 18a to 18d are
The bit memory 19 has the same image coordinates as one another.
Since the size of the surface is the same, the image data and
And tag bits are completely synchronized for the same coordinate data.
Output to the image forming processing apparatus. In addition, image data
These processes in the data processor are controlled by the control circuit 16.
And are synchronized and instructed. (Operation of Image Forming Processing Apparatus)
The operation of the processing device 3 will be described. Image input device 4
Image data interface when not using data by 0
31 selects image data from the image data processing device 1
And each subsequent image with tag bits supplied at the same time
It is supplied to the processing unit, and in step Sa10, the tag
Image processing for each image element based on the Tag bit
As shown in FIG. 2, the natural image area (3) and the graphic area
Area (2), character / line art area (1), and other areas
(0)
Which image element the image data is
It can be determined by the tag bit to be executed. As a result, the screen processing section 37
The image element corresponding to the image data is the tag supplied at the same time.
When classified into character / line drawing area (1) by bit
Is output at 400 lines and is classified into other areas
In some cases, processing is performed so as to output to 200 lines. Similarly, the γ correction unit 32
Switching of gamma correction coefficient according to bit, color
The space conversion unit 33 controls the color space according to the tag bit.
LUT switching during source conversion processing, filter processing unit 3
4 is a filter section at the time of filtering according to the tag bit.
The UCR / black generator 35 switches the number of tags
Switching of UCR / coefficient at black generation, gradation control unit
Reference numeral 36 denotes a gradation control LU at the time of gradation control according to the tag bit.
Switching of T is performed. That is, each image processing unit 3
In steps 2 to 37, the tag image is added to the supplied image data.
The optimal processing is performed on the image element indicated by the
These processing results are sent to the laser drive circuit 208,
In step Sa11, image formation is performed.
It has become. According to the first embodiment, one page
Image elements with different characteristics in different documents
On the other hand, image formation is performed while maintaining the attribute.
Therefore, it is possible to form an image with high image quality. (Modification of First Embodiment) Next, the first
Various modifications of the embodiment will be described. (Modification) FIG. 6 shows a modification of the first embodiment.
Shows a function table of tag bits according to an example
FIG. This modification has a configuration similar to that of the first embodiment.
However, the tag bit is used to convert image elements into three
It is classified into the following eight types according to the data. Sand
The tag bit is, as shown in FIG.
(Natural image) area (7), monochrome gradation (natural image) area
(6), background color area (5), fore
Ground color area (4), halftone character area
(3), color character area (2), black character area (1),
And image elements of other areas (0). But
Therefore, the tag bit memory 19 in this modification is
3 bits x 4 megapixels (12 megabits)
. In this variant
Between the image data processing apparatus 1 and the image forming processing apparatus 3
The operation is the same as in the first embodiment, and the corresponding image element
1 shows image processing apparatuses having different classifications. (Modification) FIG. 7 shows a modification of the first embodiment.
FIG. 2 is a block diagram illustrating a configuration of an image data processing device according to an example.
The same elements as those in the first embodiment have the same functions.
The reference number is attached. This modification is similar to the first embodiment.
Output a monochrome multi-valued image
Screen data processing having an image memory 18e corresponding to the force
1 shows a processing device. In this variant, the monoc
B) One pixel corresponds to the image data output of the multi-valued image.
8 bit, 400 dpi resolution, A3 size image
32 megabytes of image memory 18e
The function corresponding to monochrome multi-valued image output is
This shows an image data processing device having the same as the embodiment.
is there. In this modification, the image interface
The image data from 20 is monochrome, not color
Since the value is multi-valued, the image data output line
This is one of the force signal lines 21e. (Modification) FIG. 8 shows a modification of the first embodiment.
FIG. 2 is a block diagram illustrating a configuration of an image data processing device according to an example.
The same elements as those in the first embodiment have the same functions.
The reference number is attached. This modification is similar to the first embodiment.
In a system having the same configuration as
Memos for multi-valued image output in multiple color spaces
The image processing device having the ridges 18f to 18h is shown.
That is, this modification is based on the R, B, G color space.
Corresponding to the output of the image data having
Bit, resolution 400 dpi, size A3 image
96 megabytes of image memory 18f, 18
g, 18h, corresponding to R, G, B multi-valued image output
Data processing device having the same functions as in the first embodiment.
It shows the location. (Second Embodiment) FIG. 9 shows a second embodiment.
FIG. 2 is a block diagram illustrating a configuration of the image data processing device.
Elements having the same functions as in the first embodiment have the same reference numerals.
Is attached. Image data processing in the second embodiment
The device 2 is required in the one-page image memory 18i.
Not have a large continuous image memory space.
And have a smaller amount of virtual memory space
When developing an image, the text / line drawing area and figure area
Area and natural image area
It performs an encoding conversion process. (Image Data Conversion Unit of Second Embodiment)
The image data conversion unit 15b according to the second embodiment
Classify image elements into their attributes according to the list
The point is the same as that of the first embodiment.
Software that performs optimal coding and conversion processing for each image element
Or by hardware, and
Along with the image data in the intermediate format
Function data required for decoding
The first point is that the image is stored in the image memory 18i of the storage unit 17.
This is different from the embodiment. Here, the optimal encoding conversion processing and
Is, for example, a binary coding method for a character / line drawing area.
Expression for run-length encoding
Coding method, and JPEG method for natural image areas.
Say each. FIG. 10 shows a memory map of the image memory 18i.
Shows the relationship between the format and the image data in the intermediate format.
It is a schematic diagram. As shown in this figure, the image memory 18
i represents, for example, image data indicated by the memory map 400.
Data is stored. Character / line drawing data 401 is a binary code
Binary Bitmap Data Format 405 of Encoding Method
And the color data 402 is binarized.
Coding and run-length encoding coding
(Foreground) color data as color data
/ BG (background) 8-bit color page
Data format 406, and
Data 403 is a data format of the JPEG encoding system.
And stored as function data
404 is function data and run-length data
And stored as a data format 408 comprising
You. Here, the function data is 4 bits,
Data is a total of 16 bits of 12-bit data
Stored in the memory 408. (Image Interface of Second Embodiment)
The image interface 20b in the second embodiment of
The intermediate format image stored in the image memory 18i.
Read image data according to function data
And decodes (decompresses) it and supplies it to the image forming processor.
is there. Then, next, the configuration of the image interface 20b
Will be described. FIG. 11 shows the image interface 2
0b is a block diagram showing the configuration of FIG. In this figure, reference numeral 201 denotes a read / write
Controller, which is stored in the image memory 18i.
Character / line drawing data, color data, natural image data,
And function data to AR202-205
Read at the address referred to. Here, AR2
02 to AR205 are character / line drawing data, respectively.
Pointer register, color data pointer register
Data pointer, natural image data pointer register, and funk
Data pointer register, which
In step 400 (see FIG. 10), irregular
The stored image data of each intermediate format and its
And the correspondence between the
Image data of each intermediate format of the first page exists
Has been set. Reference numeral 206 denotes a multiplexer.
Under the control via the flash / light controller 201.
The intermediate format image supplied from the image memory 18i.
Distribute image data. Each of reference numerals 207 to 210 is FI
FO (First-In First-Out) memory.
Memory 207 stores function data in FIFO memory
208 is character / line drawing data, and FIFO memory 209 is
Color data is stored in the FIFO memory 210.
Data is stored. Reference numeral 214 denotes a communication controller,
The communication with the image forming processing apparatus which is the hand is performed. Sign 2
Reference numeral 15 denotes a function controller, which is a FIFO memory.
Read function data from memory 207 and decorate
Then what data is needed and what files
Function and determine whether the image data is expanded.
Output. (Function Controller) Next,
Diagram showing the detailed configuration of the function controller 215
This will be described with reference to FIG. In this figure, the binary data
The register 215a stores the sentence expanded by the expander 211.
This register temporarily stores character / line image data.
Similarly, the color data register 215b is
12 is transferred to the natural image data
The register 215c is a natural image expanded by the expander 213.
These registers temporarily hold data. Reference numeral 215d denotes a function decode code.
Controller, and funk from FIFO memory 207.
Read and decode application data, and
Control. In addition, the function decode
The controller 215d is a function execution pixel.
Built-in counter that counts
Same as indicated in the run length field of the
Count the number of execution pixels of the function. Sign
215e and 215f are multiplexers, respectively.
Function decode command via controller 215g
Controller 215d to select and output one input.
Power. Where the function decode controller
Diagram of contents of decoding performed in 215d
13 will be described. In this figure, use of character data (0)
Indicates a data area of a character / line drawing area,
Especially when this bit is “0”, character data is
To expand the character / line drawing data into image data.
Output. The number of output pixels at this time depends on the function
Data in the run length field
It is pixel equivalent. Next, the color data inversion (1) is usually
When referring to the color data of FG color data,
Is referenced as the foreground color of a character or shape
BG color data is
This bit, while referred to as the
When it is “1”, FG color data and BG color data
The data is the background color and the foreground, respectively.
-It is necessary to refer to the inverted color
Show. The graphic / natural image (2) is a graphic data
Data area or natural image data area,
In the case of a graphic data area (when this bit is "0")
), Run-length decode and output image data
On the other hand, in the case of natural image data (when this bit is "1"
In some cases), expand the natural image data and
Output. Here, run length for run length decoding
Of the image data output by expanding the natural image data
The number of pixels in the function data
Only the pixels shown in the run length field
Is forced. By the way, use of character data (0) and graphic
/ Instructions for natural image (2) indicate that both character data
If indicated, output using character / line drawing data.
Force, foreground color and background color
Color can be selected from FG color and natural image data.
Is done. At the same time, color data inversion (1) is specified.
Output of FG color and natural image data
You. The white output (3) is a white output.
Indicates that data is to be output.
Used when outputting the margin or margin. Output at this time
The number of pixels of the image data
Pixels in the run-length field
Output. (Operation of Second Embodiment) Same as in the first embodiment.
The host computer received via the data communication unit 12
The PDL file from the computer 11 is controlled by the control circuit 16.
Under the control, the image developing unit 13 performs image developing processing. this
At this time, in the image developing unit 13, the
An object list is created, and the image data conversion unit 15
b interprets this object list,
It is classified into each attribute. In the second embodiment,
Image elements include a character / line drawing area, as in the first embodiment.
It is classified into a graphic area and a natural image area. Classified images
The image elements are converted to each image element by the image data conversion unit 15b.
The optimal encoding conversion process is performed on the
The image data in the intermediate format is stored in the image memory 18.
i. The image data conversion unit 15 performs this processing.
At the same time as these intermediate format image data
To generate a raster image by combining
Function data for the image memory 1
8i. One or more pages are stored in the image memory 18i.
The storage of the image data in the intermediate format of the page is completed.
Then, as in the first embodiment, the image interface
Communication / synchronization signal with the image forming processing device by the stage 20b
Communication is performed via the line 23, and the image output synchronization signal is
Is output. Image interface means 2
0b indicates an instruction to output image data to the control circuit 16.
You. Thereby, the image data in the image memory 18i is stored.
Is an image forming process via the image interface 20b.
Output to the device. (Operation of Image Interface)
The operation of the image interface 20b will be described. System
The control circuit 16 outputs image data to the image processing / forming apparatus.
When the instruction is given, in FIG.
Image data is supplied to this image interface 20b
Is done. Then, first, the FIFO memories 207 to 210
Until each data is in FULL state
Stored. That is, the function data is FI
Character / line drawing data is stored in the FIFO
In the memory 208, the color data is stored in the FIFO memory 209,
The natural image data is stored in the FIFO memory 210, respectively.
Is done. In the FULL state, the synchronization signal is
An image is transmitted from the controller 214 via the communication / synchronization signal line 23.
The data is output to the image forming processing device and data output is instructed.
You. On the other hand, upon receiving this, the image forming processing apparatus sends the image
Communication / synchronization with the communication controller of interface 20b
Synchronization signal for instructing image data output via signal line 13
Is output. Then, the communication controller receiving the synchronization signal
LA 214 is to the function controller 215
Then, an instruction to read data from the FIFO is issued. This
Function controller 2 that has received an instruction to read
15 is a function data stored in the FIFO memory 207.
Data to determine what data is needed next,
Function is determined. And
The function controller 215 has a function
The image data is output according to the instruction. Here, data is read into the FIFO memory.
Only the FIFOs that are no longer in FULL state
Until the image output of one page is completed.
During this time, it is controlled to keep the FULL state.
These processes are basically performed line by line.
One page by repeatedly outputting all line data
Is completed. (Operation of Function Controller) Next
The function controller 215 in FIG.
The operation of will be described. Function decode control
The controller 215d outputs the data from the FIFO memory 207.
The temporary storage of the function data
Function table shown in Fig. 3
The binary data register 215a,
-Data register 215b, natural image data register 21
5c and the controller 215g.
This will execute the decoded function
You. At this time, the data required to execute the function
Is the binary data register 215a and the color data register
Data 215b or the natural image data register 215c.
It is read from the difference. For example, a funk for outputting color data
Function decode controller 2
15d gives an instruction to the color data register 215b.
And multiples via the controller 215g.
215e and 215f are the color data registers 215.
Command to select the output of b. This allows
Data is read from the color data register 215b.
And sequentially through the multiplexers 215e and 215f.
It is output and the function is executed. Then, the function decode control
The execution picture given by the counter in the
Execution of the same function is counted by the number of cells
And the execution of that function ends, and a new
As the function data is read, the next fan
The data required to execute the action is stored in the binary data register.
215a, color data register 215b or natural
Is read into any of the image data registers 215c,
The next function is performed in a similar manner. Needless to say
No, the data required for execution corresponds to the load destination
From any of the FIFOs 208 to 210, the decompressor 21
1, 213 or the corresponding register via the delay unit 212.
Is read by the star. Output of character / line image data, natural image data
Output or a combination of these functions
The same processing is applied to the
It is possible to obtain a raster image of the image data.
You. The controller 215g executes the file to be executed.
Data, color data, and natural image data
Of which data is output,
Generate raster images of image data
The tag corresponding to the function as shown in FIG.
Bit and generate the tag bit in synchronization with the image data.
Power. Note that the reference numerals used in the second embodiment
In the method, M is used for character / line drawing and graphic areas.
Using MR coding method and natural image area
May use a DCT coding method or the like. According to the present embodiment, when forming an image,
Image elements without relying on the inherent color space of
Can perform appropriate image processing on
In addition, such conversion processing can be performed by hardware.
The conversion process takes time.
Can be avoided. (Modification of Second Embodiment) Next, the second embodiment will be described.
A modification of the embodiment will be described. In this modified example, as shown in FIG.
High space above the area of the halftone image element like
When there are image elements such as characters that require resolution
In addition, image data processing
Image screen with no image degradation on the device side
(For example, area gradation method such as halftone dot and error diffusion method)
Performing On the other hand, this modified example
No processing is performed on the image forming
Only the image elements such as
Perform the process of generating a scene. This will cut the screen
Image degradation that occurs on alternate borders can be prevented.
You. Further, the configuration is the same as that of the second embodiment.
Does not cause image degradation in the host computer 11
Low noise screens and different image screen angles
Generate an image screen, etc., and generate the image screen
Is read via the data communication unit 12, and for each image element
A function to specify a different image screen may be provided. (Third Embodiment) Next, a third embodiment according to the present invention will be described.
An example will be described. In the third embodiment, a plurality of
Image elements with different color spaces
And its attributes can be saved. FIG. 15 shows an image data according to the third embodiment.
FIG. 2 is a block diagram showing a configuration of a data processing device 1C,
It has the same function as the image data processing device 1 in the embodiment.
The same reference numerals are given to the same elements. The picture in this figure
The image development unit 13C is a PDL file described in a specific PDL.
This performs the image development processing of the file.
Interprets the file and creates an object list for each image element.
This is similar to the first embodiment except that the object
There is a slight difference for Trist. That is, the object in this embodiment is
The list is an image included in the image data processing device 1C.
Where in the coordinate space the image element is located,
What color does the image element have, such as
Object and what kind of
Structure indicating whether the image element has the attribute of color space
It differs from the first embodiment in that it has a body configuration.
You. Here, regarding the attributes of the color space, CIE
Base tristimulus values XYZ, device KYMC, device
Can be expressed by RGB, etc.
For convenience of explanation, in the third embodiment, the device KYMC
It will be described as. Further, the image developing section 13C outputs the target image.
Color space of image forming processing device 3C (described later)
When developing raster image elements other than
The color space of the raster image element and its image
Recognize the position of the image element from the object list and
Color space converted image required to indicate the presence of these image elements
A prime list is created and passed to the control circuit 15C. Control circuit 1
5C controls each part and this color space
The converted image element list is held until image data is output. Here, the color space conversion image element list
Will be described. This color space converted image element
The list is an image memory 18a in which image data is stored.
18d have the same image coordinate space as the
Lists the color space bits corresponding to each coordinate
It is. The color space bits in this embodiment are
Is a color space conversion fan as shown in FIG.
Actions are defined in the following four types with 2 bits.
You. That is, the color space bit is the device KY
MC → Device KYMC (through) conversion (0), CIE
 XYZ → device KYMC conversion (1), device YM
C → device KYMC conversion (2) and device RG
B → Device KYMC conversion (3)
Exchange. (Image Forming Processing Apparatus Applied to Third Embodiment)
Next, image formation applied to the third embodiment will be described.
The processing device 3C will be described. FIG. 17 shows an image forming process.
It is a block diagram showing the composition of 3C. In this figure
The image forming processing apparatus 3C includes a gamma correction unit in FIG.
The other parts are the same.
Since there is, description is omitted. (Operation of Third Embodiment) Next, the third embodiment
The operation of the example will be described. First, the host computer
The PDL file created by 11 is transmitted to the communication unit 12
Received by the control circuit 16C,
The image is expanded and interpreted by the opening unit 13C. Next
In the image developing unit 13C, each image element
Object list is created in the same manner as in the first embodiment.
Is done. Next, the image data in the object list
The data is virtually rasterized by the image developing unit 13C.
Rasterized based on the object list.
Expansion / conversion processing is performed as a
It is. At this time, the smallest (x = 0,
(y = 0) from the position in the x direction every scan line.
The existence of the object is checked and if the object exists
Is confirmed, the expansion process is performed on the object.
Required for one scan line in the x direction.
The data is calculated to obtain the required data. A similar process exists for one scan line.
By performing for all objects,
The scan line bytemap is obtained and its one scan
Byte map is written to the image memories 18a to 18d.
And then the next scanline is expanded.
Be done. Similarly, all the scanners on one page
Of the image memory 18a.
-18d rasterized image data is written
You. Here, image development is performed during the development / conversion processing.
The unit 13C is a unit provided in the target image forming processing apparatus.
Raster other than space (here, device KYMC)
-When developing image elements, that is,
If the raster image element has
Color space and its image element locations
And recognize the presence of these image elements
Control circuit by creating color space conversion image element list
16C. In response to this,
The path 16C displays the color space conversion image element list.
Holds until image data is output. The image developing section 13C has a color space.
Image elements listed in the source image element list
To the color space of this image data processing device
Sent as a PDL file without conversion
Perform expansion processing in color space. At this time,
For image elements that have the color space of the
Is stored in the image memories 18b to 18d for YMC.
Each expansion process is performed. (For example, device RGB
Or in the case of CIE XYZ, the image of each YMC
Expansion processing is performed on the memory 16 for use. ) As described above, the image data conversion unit 15C
Image data expansion processing to the image memories 18a to 18d
Is completed, the image interface 20C displays
Communication with the intended image forming processing apparatus 3C
The image output synchronization signal is transmitted via the communication / synchronization signal line 23.
Supplied. When this is received, the image interface 2
0C instructs the control circuit 16 to output image data.
Accordingly, the images stored in the image memories 18a to 18d are
Data is image-formed through the image interface 20
Output to the processing device. At that time, the control circuit 16C
Outputs image elements that require color space conversion processing.
The color spectrum created by the image
The color space is referenced by referring to the color conversion image element list.
To generate a color space bit that indicates
An instruction is given to the image interface 20C. Received this
The image interface 20C simultaneously outputs image data.
To generate and output a color space bit. Image data and color output here
The space bits are output signal lines 21a to 21a, respectively.
sent to the image forming processing device 3C via
You. At this time, the image data and the color space bits are
The smallest image coordinate space of the image memories 18a to 18d
From the position (x = 0, y = 0) in the x direction
The image data is scanned and sent sequentially for each input.
Memories 18a to 18d for storing image data and a control circuit
Color space conversion image element list held by 16C
Image coordinate space has the same image coordinates and
Since the size is the same, image data and color
-Space bits are completely synchronized for the same coordinate data
Output to the image forming apparatus. In addition, these images
Processing in the image data processing device is performed by the control circuit 16C.
And are indicated in a synchronized manner. Next, the operation of the image forming processing apparatus 3C will be described.
Will be explained. In the image interface 31, image input
With or without data from device 40
The input image data can be switched
You. In the latter case, the image interface 31
The image data from the data processing device 1C,
Subsequent processing with supplied color space bits
Supply to the conversion unit. At this time, the image interface 31
Also interprets the color space bits,
The result is supplied to the control unit 39. Color space converter 3
3 is the table shown in FIG.
Color space conversion functions classified by
To the image data supplied at that time.
Execute. Each control of the image forming processing apparatus 3C is performed.
For example, synchronous control, system control, UI control,
Image processing control, communication control, and the like are performed by the control unit 39.
The color space conversion process to be performed
Before the operation is started by software by the control unit 39.
Is instructed. (Specific processing in the third embodiment)
The document shown in FIG. 18 corresponds to the third embodiment.
How it is processed will be described. In this figure
The original image 500
Having a plurality of image elements, ie, device RGB data
Image element 501, device YMC data image element 50
2, each of the CIE XYZ data image elements 503
When outputting each image,
A color space conversion process is performed on the element. In the third embodiment, the device RG
When outputting the B data image element 501, the device RGB
→ Color space bit of device KYMC conversion (3)
Is generated and RGB → device KYMC conversion processing is performed.
While device YMC data image element 502 output
Sometimes device YMC → device KYMC conversion (2)
Is generated and the device YMC →
Device KYMC conversion processing is performed.
When the XYZ data image element 503 is output, CIE X
YZ → device KYMC conversion processing is performed.
Change device KYMC to device KYMC for area
A color space bit of exchange (0) is generated and the device
KYMC → device KYMC conversion (through) processing is performed
Will be done. According to the third embodiment, one page
Have image elements in different color spaces in
The image data processing device
Do not perform color space conversion processing like software
Hardware-based pipeline processing during image formation
To perform the color space conversion process
It is shorter than before, and the image development and shape
And output. (Modification of Third Embodiment) Next, the third embodiment
A modification of the embodiment will be described. FIG. 19 shows this
Block showing a configuration of an image data processing device according to a modification
FIG. This figure is similar to the third embodiment shown in FIG.
The same reference numerals are given to the configurations. This modification is substantially the same as the third embodiment.
Although the configuration is such that the color matching circuit 50
Difference in that it is provided on the output side of the interface 20C
I do. The color matching circuit 50 includes a device KY
Color space conversion LUT corresponding to each MC
Color space is changed by the instruction of the switching signal.
Cuts the color space conversion LUT referenced in the
Color space conversion and color matching
Perform processing. Such a color matching circuit 50 is
DLUT (Direct Look Up Table)
Configuration) using color matching LSI etc.
It is possible. FIG. 20 shows color space bits and colors.
Table showing correspondence with matching function
It is. In this modification, in the image data processing device
Color space conversion and color matching processing
Is carried out, so that the
When the error bit is specified, the image forming
Is not subjected to color space conversion processing,
Image processing such as gradation correction is performed. In this modification, similar to the third embodiment, the image
Colors normally performed while retaining the attributes of image elements
Space conversion and color matching.
Instead, an image expansion process is performed. After that, the third implementation
As in the example, the image data and color space bits
Is output from the image interface 20C, and the color
In the matching circuit 50, the former is used as an image input signal,
Provide the color space conversion LUT switching signal.
Paid. The color space bits correspond to the same coordinates
Is supplied in synchronization with the image data
Color space referred to in color space conversion of
The image conversion LUT is switched in real time, and each image
Color space conversion processing and color mapping
A ching process is performed. Next, the processing according to this modification is shown in FIG.
The following is an example using the document shown.
You. The document 600 shown in FIG.
Input by three different image input devices A, B, C
Image elements that are
Elements 601, 602, and 603 are image input devices, respectively.
A, B, and C. In this modification, color matching
When the image element 601 is output by the circuit 50,
Is the color space change from the image input device A to the image output device.
Conversion processing is performed and the image element 602 is output.
Is the color space change from the image input device B to the image output device.
Conversion processing is performed, and when the image element 603 is output,
The color space of the image input device C → the image output device
Data conversion process, while in other cases the
A default color matching process is performed. According to this modification, a different image input device
The image element input by is included in one document
Image attributes while maintaining the attributes of each image element.
Opening / generating processing is performed, and a different color is
-Higher quality input due to matching process
An image output that faithfully reproduces the colors of the image can be obtained.
It works. [0118] According to the invention described above, the image forming method
Depends on the spatial resolution and gradation resolution specific to the device.
Performs appropriate image processing on image elements without performing
A certain spatial resolution and gradation resolution
Can be prevented from deteriorating.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of an image data processing device according to a first embodiment of the present invention. FIG. 2 is a diagram showing a tag bit function table in the embodiment. FIG. 3 is a block diagram illustrating a configuration of an image forming apparatus applied to the embodiment. FIG. 4 is a diagram for explaining classification of image elements in the embodiment. FIG. 5 is a diagram for explaining the operation of the embodiment. FIG. 6 is a diagram showing a tag bit function table in a modification of the embodiment. FIG. 7 is a block diagram illustrating a configuration of an image data processing device according to a modification of the embodiment. FIG. 8 is a block diagram showing a configuration of an image data processing device according to a modification of the embodiment. FIG. 9 is a block diagram illustrating a configuration of an image data processing device according to a second embodiment of the present invention. FIG. 10 is a schematic diagram showing a relationship between a memory map of an image memory and image data of an intermediate format in the embodiment. FIG. 11 is a block diagram showing a configuration of an image interface in the embodiment. FIG. 12 is a block diagram illustrating a configuration of a function controller in the image interface according to the embodiment. FIG. 13 is a diagram for explaining the contents of decoding performed by the function decode controller in the embodiment. FIG. 14 is a diagram illustrating a document applied to a modification of the embodiment. FIG. 15 is a block diagram illustrating a configuration of an image data processing device according to a third embodiment of the present invention. FIG. 16 is a diagram showing a color bit function table in the embodiment. FIG. 17 is a block diagram illustrating a configuration of an image forming apparatus applied to the embodiment. FIG. 18 is a diagram for explaining the classification of image elements in the embodiment. FIG. 19 is a block diagram showing a configuration of an image data processing device according to a modification of the embodiment. FIG. 20 is a diagram illustrating a color matching function table according to a modification of the embodiment. FIG. 21 is a diagram for explaining classification of image elements in a modification of the embodiment. [Description of Symbols] 12 Data communication unit (input means), 13 Image expansion unit (expansion means), 15 Image data conversion unit (image data conversion means), 18a to 18d Image memory ( Image data storage means), 19 ... tag bit memory (attribute information storage means), 20 ... image interface (data output means), 32-37 ... image processing unit (image processing means).

Claims (1)

Claims 1. An input means for inputting a file described in a predetermined format and having image elements of a plurality of different types of spatial resolution and gradation resolution, and interpreting the file. Developing means for generating a plurality of types of attribute information for classifying image elements, and converting the file expanded by the developing means into image data corresponding to the spatial resolution and gradation resolution required by the image elements Image data conversion means; image data storage means for storing the image data; attribute information storage means for storing the attribute information in the same coordinate space as the image data; and attributes stored by the attribute information storage means. Information and image data stored by the image data storage means are read and output in correspondence with a coordinate space. Image processing means for performing image processing on the image data output by the data output means in accordance with the attribute information output by the data output means. apparatus.