JPH07287560A - Processor and method for image processing - Google Patents

Abstract

PURPOSE:To obtain a color reproduction faithful to original image and select and indicate a color space compressing process for a received image during a communication by performing the color space compressing process adaptive to the received image and outputting the processed image. CONSTITUTION:All image data which are compressed and encoded are inputted to the communication part 3 of the image processor 10 from an external device 8 and transferred to an image expansion part 4, and a detection part 5 detects whether or not the restored image data are within a color reproducible range. Once image data which are not included in the color reproducible range are detected, color space compressing process candidates are displayed at a display part 1 and the operator is prompted to select and indicate a process. The operator selects the desired color space compressing process through an indication input part 6. The selection information is sent to a color space compression part 7, and the received image is processed by the desired color space compression and outputted from an output part 2. Namely, since the operator can select the proper color space compressing process, the image data are reproduced faithfully to the original image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus and method, and more particularly to an image processing apparatus and method capable of receiving color image data from an external device to form an image and outputting the image.

[0002]

2. Description of the Related Art Conventionally, in an image processing apparatus that receives a color image from an external device to form an image, the received image data is displayed and the operator confirms the output, Alternatively, the operator performs various image processes on the displayed received image and then outputs the image.

When displaying image data received by a conventional image processing apparatus, first, all received data are received, decompressed and restored, and then the restored image is converted according to the display capability of the display means. It was displayed. Or, by receiving image data converted to several levels of resolution in order of decreasing resolution, and decompressing and displaying this in sequence, the operator can check the overall image of the image data roughly, but faster. An image reproduction method by a progressive build-up method that uses a so-called hierarchical process that can be used was adopted.

[0004]

However, in the above-mentioned conventional image processing apparatus, for example, when the received image data includes color space data that cannot be reproduced by the image processing apparatus, the color space data that cannot be reproduced is No processing is performed, or only a predetermined color space compression process is performed in order to appropriately match the color reproduction range of the output device, and the color space is transferred.
Therefore, not all received color image data is faithfully reproduced, and it is not possible to faithfully reproduce the original image depending on the color reproduction ability of the image processing apparatus, or the color reproduction is performed on the received image. There was an inconvenience that a correction process was required.

Further, since the most suitable compression processing differs depending on the image to be color space compressed, such as computer graphics and natural images, all the received image data can be faithfully reproduced only by the fixed color space compression. It was not enough for color reproduction.

Further, when the operator confirms the displayed color image, if the display is performed by decompressing and restoring after receiving all the image data, it takes time until the operator can confirm the image display. Therefore, most of the communication time elapses, or the image is finally displayed after the communication ends.

Further, even when the display is performed by using the hierarchical progressive build-up method, it is possible to roughly confirm the entire received image by the display at the low resolution stage, but especially the color reproduction of the received image is possible. For example, when the operator needs more detailed confirmation with a higher-resolution image, it takes a considerable amount of time before an image that can be confirmed by the operator is displayed.

[0008]

The present invention has been made to solve the above-mentioned problems, and has the following constitution in order to solve the above-mentioned problems.

That is, input means for inputting compressed image data, expansion means for expanding the image data input by the input means, and a color reproduction range of the image data expanded by the expansion means are detected. It is characterized in that it has a judging means for judging whether or not it is within the color reproduction range of the image output device, and a color space compressing means for carrying out a color space compression process according to the judgment result by the judging means.

Further, there is provided an instruction input means for inputting a selection instruction, and a display means for displaying at least two different color space compression processes when the determination means determines that there is image data out of the color reproduction range. When the instruction input means selects and instructs the color space compression processing displayed on the display means, the selected color space compression processing is performed.

Further, there is provided color reproducibility predicting means for predicting the color reproducibility of the entire image by inputting the image data stepwise from the input means in the order of containing much feature information relating to color reproduction.
The color reproducibility predicting unit predicts color reproducibility from the image data input at an early stage of the input unit, and detects image data outside the color reproduction range of the image output device from the color reproducibility of the entire image. Is characterized by.

Also, input means for inputting the compressed image data stepwise in the order of containing much feature information relating to color reproduction, and color reproduction for predicting the color reproducibility of the entire image from the stepwise input image data. According to the display capability of the display means according to the result of the discrimination by the discrimination means, the discrimination means for discriminating the type of image data based on the color reproducibility predicted by the color reproducibility prediction means, It is characterized by comprising a complementing means for performing the complementing processing and a display means for displaying the image data subjected to the complementing processing by the complementing means.

Further, an instruction input means for inputting an instruction, a processing means for performing various processings on the image data displayed on the display means based on the instruction input, and an image data for the image data based on the instruction input. And output means for outputting.

For example, the input means sequentially inputs image data at a stage where the quantization accuracy of the color components of the image data is coarse.

Further, for example, the input means inputs the image data by receiving code-compressed image data from an external device.

Further, for example, the output means outputs the image data by transmitting the image data to an external device.

[0017]

With the above structure, the operator can control the image output and can instruct the image processing during the communication, that is, the desired image communication processing can be performed at a higher speed. .

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described in detail below with reference to the drawings.

<First Embodiment> FIG. 1 is a block diagram showing the arrangement of an image processing apparatus according to this embodiment.

In FIG. 1, 10 is the main body of the image processing apparatus of this embodiment, and 8 is an external device for transmitting and receiving image data to and from the image processing apparatus 10.

In the image processing apparatus 10, 1 is a display unit such as a CRT for displaying a received image and a warning out of a color reproduction range described later, 2 is an output unit including a memory for outputting the received image on a storage medium, 3 Is a communication unit for transmitting / receiving compressed image data to / from the external device 8, 4 is an image expansion unit for expanding the received compressed image data, and 5 is an image restored by the image expansion unit 4 within the color reproduction range of the output unit 2. Is a detection unit for determining whether or not the received image is input, 6 is an instruction input unit such as a keyboard or a mouse to which various selection instructions are input by the operator, and 7 is a color space compressed into a received image according to the selection instruction input from the instruction input unit 6. The respective color space compression units that perform processing are shown. The various processing units described above are connected to the CPU 20 by the CPU bus 9, and the CPU 20 controls the operations of the various processing units.
Reference numeral 11 is a RAM used as a work area when the control processing by the CPU 20 is performed. Reference numeral 12 is a ROM that stores various control programs, LUTs, etc., and is referred to by the CPU 20 as necessary.

Next, the operation of the image processing apparatus 10 in the present embodiment having the above-mentioned structure will be described in detail with reference to FIG.

FIG. 2 is a flow chart showing the image processing in this embodiment.

In FIG. 2, first, in step S101, the compression coded whole image data is input from the external device 8 to the communication section 3 of the image processing device 10 via a communication line or the like. Then, in step S102, all the image data input to the communication unit 3 is transferred to the image decompression unit 4 and subjected to decompression processing, and the processing proceeds to step S103. In step S103, the image data restored by the image decompression unit 4 is transferred to the detection unit 5, and the detection unit 5 detects whether or not all the restored image data are within the color reproducible range by the output unit 2. To do.

Here, the detection section 5 holds in advance data indicating the limit of the color reproduction range in the output section 2, and the detection in step S103 detects the decompressed image data and this pre-stored data. It is done by comparing. This comparison processing is realized by a comparator, a look-up table, or the like, but may be performed by software processing using a general-purpose processor such as DSP.

Then, the process proceeds to step S104 to transfer the image data to the display unit 1 and display it. Next, in step S105, it is determined whether the image data outside the color reproduction range is detected in step S103. If the image data outside the color reproduction range is detected, the process proceeds to step S107. Step S10
7, the image data is displayed on the display unit 1 at the same time as step S1.
The detection result in 03 is also displayed at the same time. At this time, the display on the display unit 1 is expressed in a format in which the operator can clearly recognize that the image data outside the color reproduction range of the output unit 2 exists. Further, since the data outside the color reproduction range is detected, the fact that the color space compression processing is necessary is displayed at the same time to notify the operator, and a selectable color space compression processing candidate is displayed. Prompt the operator to select.

The color space compression processing candidates displayed in step S107 are, for example, a method of preserving gradation (Perceptual Match) suitable for a photograph having a large number of colors, and a color of an original. In order to reproduce as faithfully as possible, a method of approximating the closest color in the reproducible range (ColormetricMatc: ColormetricMatc
h), suitable for computer graphics (CG), etc.,
There is a method that saves with emphasis on hue rather than brightness (SaturationMatch).

When displaying the image data in step S104, the image data which is out of the color reproduction range can be easily recognized by the operator as data out of the color reproduction range on the image displayed on the display unit 1. It will be displayed by overlaying it with a color scheme so that it is possible to easily confirm its position and compare it with surrounding images. In addition, due to restrictions on the display unit 1 and the like, it is possible to display the image data outside the color reproduction range side by side with the received image data, or to switch and display the screens. Further, in order to notify that the data outside the color reproduction range has been detected, an alarm sound is generated at the same time as the display on the display unit 1, or a display such that only the portion where the data out of the color reproduction range is displayed blinks. Is also effective.

Then, in step S108, one color space compression process desired by the operator is selected from the color space compression process candidates displayed in step S107. This selection process is performed from the instruction input unit 6. Then step S
In step 109, the selection information of the color space compression process selected in step S108 is transmitted to the color space compression unit 7, and the color space compression process is performed on all or part of the received image according to the selection information. After that, the process proceeds to step S110,
The image data is transferred to the output unit 2 and output.

In step S109, the color space compression section 7 can of course execute all of the selectable color space compression processing displayed on the display section 1 in step S107. It is also possible to perform different color space compression processes at the same time. In this embodiment, the color space compression processing in the color space compression unit 7 is realized by a look-up table (LUT), but a general-purpose processor such as a DSP may be used as in the detection unit 5, for example.

On the other hand, if it is determined in step S105 that there is no image data outside the color reproduction range, there is no need to perform color space compression processing, so the flow advances to step S110. Depending on the case, a predetermined color space compression process may be performed here.

In this embodiment, the image output to the output unit 2 in step S110 is substantially writing to the memory in the output unit 2, and the communication unit stores the color space compressed image data. It is also possible to transmit the image data to the external device 8 via 3 or to expand the compressed image data again and output it from a printer unit (not shown) onto a recording medium.

Further, as shown in step S108, when the operator selectively inputs the color space compression processing, for example, if the area can be designated on the displayed image at the same time, the color space can be changed according to the area. It is also possible to select a compression process and perform two or more color space compression processes on one image as desired by the operator.

As described above, according to the present embodiment, even when the received image data contains color space data that cannot be reproduced by the image processing apparatus, the operator can select an appropriate color space compression process. Is possible,
The effect that the received color image data is faithfully reproduced as the original image is obtained.

<Second Embodiment> The second embodiment according to the present invention will be described in detail below.

The configuration of the image processing apparatus in the second embodiment is shown in the block diagram of FIG. In FIG. 3, the same components as those shown in FIG. 1 of the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted. In FIG. 3, reference numeral 13 denotes an image prediction unit that predicts color reproducibility of all image data from image data of a higher-order bit plane, which will be described later.

In the second embodiment, image reproduction using a so-called hierarchical progressive build-up method for image data communication will be described.

In color image communication, several types of image compression methods and communication methods have been proposed or standardized.
As a compression / transfer method for faithfully reproducing a full-color image without deterioration, there is a method of compressing and transferring color components quantized into multiple bits for each bit plane. This is a so-called bit plane encoding method, and a multi-valued image of n bits per pixel is handled as n 1-bit images. For example, a method of adapting JBIG or the like used for binary image compression for each bit plane can be considered. When the multi-bit quantized color component is compressed for each bit plane in this way, the higher the bit plane, the stronger the inter-pixel correlation with surrounding pixels and the more dominant the color component configuration of the pixel. The plane has a property that the compression efficiency is higher and more characteristic information about the color reproduction of the original image is included. Therefore, it is possible to predict almost the final image data regarding the color reproducibility from the data of the upper bit plane.

Therefore, in the second embodiment, the progressive build-up method is used to sequentially receive the data of the upper bit plane containing a lot of characteristic information regarding color reproduction as described above. When the compressed images are sequentially received from the upper bit planes, the higher the upper bit planes are, the higher the compression efficiency is. Therefore, the communication time required to receive each bit plane is shorter in the upper bit planes.

Image processing in the second embodiment will be described below with reference to FIG. FIG. 4 is a flowchart showing the image processing of the second embodiment.

In FIG. 4, first, in step S301, the external device 8
Of the image data compressed for each bit plane from
The communication unit 3 receives the most significant bit plane (MSB) data. Then, in step S302, step S
The data received at 301 is decompressed and restored by the decompression unit 4, and the most significant bit plane image is displayed on the display unit 1 at step S303. Next, in step S304, it is determined whether or not a flag indicating whether or not color space compression processing, which will be described later, is performed is "ON". If the flag is not “ON” in step S304, it is determined that the color space compression process is not selected, and the process proceeds to step S305. Step S305
Then, the fact that the received most significant bit plane data contains a lot of image feature information is used to
In, the color reproducibility of the entire image is predicted from the bit plane data.

Then, in step S306, the image data predicted by the image prediction unit 13 is transferred to the detection unit 5,
The detection unit 5 detects whether or not all the predicted image data are within the range in which the output unit 2 can reproduce colors.

Then, the process proceeds to step S307, and it is determined whether or not the image data outside the color reproduction range is detected in step S306. If the image data outside the color reproduction range is detected, the process proceeds to step S3.
Go to 08. In step S308, the display unit 1 simultaneously displays the image data and the detection result in step S306. At this time, the display on the display unit 1 is expressed in a format in which the operator can clearly recognize that the image data outside the color reproduction range of the output unit 2 exists.
Further, since the data outside the color reproduction range is detected, the fact that the color space compression processing is necessary is displayed at the same time to notify the operator, and the selectable color space compression processing candidates are displayed. Prompt the operator to select.

The display method on the display unit 1 in step S308 is as shown in FIG.
This is similar to the display in steps S104 and S107.

Subsequently, in step S309, it is determined whether or not the operator selects a desired color space compression process within a predetermined time from the color space compression process candidates displayed in step S308. This selection process is performed from the instruction input unit 6. When the operator makes a selection input in step S309, the process proceeds to step S310, the flag indicating that the color space compression process is selected is set to "ON", and the process proceeds to step S311. It is assumed that this flag has been initialized to "off" in advance.

On the other hand, if the flag is "ON" in step S304, the process proceeds to step S311, and also when it is determined in step S307 that there is no data outside the color reproduction range. It proceeds to step S311. Also, if no selection input is made by the operator in step S309, step S309
Proceed to 311.

In step S311, it is determined whether or not reception of all image data, that is, all bit planes has been completed. If it is finished, the process proceeds to step S312,
If not completed, the process returns to step S301, the data of the next bit plane is received, and the processing described above is repeated.

In step S312, the color space compression process selected in step S309 is applied to all image data. However, when there is no image data outside the color reproduction range, preset color space compression processing is performed. Then, in step S313, the color space-compressed image data is output to the output unit 2.

In this embodiment, the image output to the output unit 2 in step S313 is substantially writing to the memory in the output unit 2, and the communication unit stores the color space compressed image data. It is also possible to transmit the image data to the external device 8 via 3 or to expand the compressed image data again and output it from a printer unit (not shown) onto a recording medium.

Further, similarly to the above-described first embodiment, when the operator selects and inputs the color space compression processing in step S309, for example, it is possible to simultaneously specify the area on the displayed image. It is also possible to select a color space compression process according to a region and perform one or more color space compression processes on one image as desired by the operator.

As described above, according to the second embodiment,
First, the color reproducibility of all image data is predicted from the data of the most significant bit plane, and the operator is notified of this to select the optimum color space compression processing. If the operator cannot select the color space compression process in the most significant bit plane, the same process is performed using the second bit plane. The entire color space compression process can be selected. That is, there is an effect that an appropriate color space compression process can be instructed without waiting for the reception of all image data. That is, it is not necessary for the operator to intervene until the reception of all the image data is completed.

Further, the data format communicated with the external device 8 described in the second embodiment is not limited to the compressed data by the above-mentioned bit plane coding method, but the quantization accuracy of the color component is stepwise. The same effect as in the second embodiment can be obtained as long as it is a method in which data can be transferred in order from the data held and coarse steps.

<Third Embodiment> The third embodiment of the present invention will be described in detail below.

FIG. 5 is a block diagram showing the arrangement of an image processing apparatus according to the third embodiment. 5, the same components as those in FIG. 1 shown in the first embodiment and FIG. 3 shown in the second embodiment are denoted by the same reference numerals and the description thereof will be omitted.

In FIG. 5, reference numeral 15 is a discrimination process for discriminating the feature of the image from the image data restored by the image decompression unit 4, and a complement for adapting the received image data to the display capability of the display unit 1 based on the discrimination result. A determination / complementation processing unit 17 for performing processing and an image processing unit 17 for performing image processing such as various processing on the received image data in accordance with a selection instruction from the instruction input unit 6 by the operator.

Next, the operation of the image processing apparatus of the third embodiment will be described in detail with reference to FIG. The third embodiment uses the progressive build-up display described in the second embodiment to perform complementary processing suitable for the display unit 1.

FIG. 6 is a flow chart showing image processing in the image processing apparatus of the third embodiment. First, S201
In the image data compressed for each bit plane from the external device 8, the communication unit 3 receives the most significant bit plane (MSB) data. In step S202, the decompression unit 4 decompresses and restores the data received in step S301, and in step S203, the image prediction unit 13 predicts the color reproducibility of the entire image from the bit plane data.

Then, in step S204, a predetermined number of pixels of the predicted image data are transferred to the discrimination / complementation processing unit 15. In the discrimination / complementation processing unit 15, first, the feature is discriminated from the data of the pixel of interest and the pixels in the vicinity thereof (hereinafter referred to as “reference pixel”).

In the image feature discrimination processing in step S204, the density gradient in the reference pixel, the frequency component distribution, etc. are obtained by calculation, and a character / line drawing composed of, for example, a binary character and a line drawing is obtained by a preset threshold value. It is determined whether the image is a copy or the like, or a natural image part such as a photograph including a halftone. When determining the threshold value that serves as the discrimination criterion at this time, the character / line drawing part has a relatively large density gradient and contains high frequency components, while the natural image part that contains many halftones, conversely, has a density gradient. Is used, and characteristics such as a tendency not to include high frequency components are used.

Next, the processing advances to step S205, and as a result of the discrimination processing in step S204, the reference pixel is a character
It is determined whether or not it is a line drawing part. Step S2
If it is determined in 05 that the character / line drawing portion is detected, the process proceeds to step S206. In step S206, the discrimination / complementation processing unit 15 performs optimal complementation processing on the image data to display a character / line drawing on the display unit 1. For example, a representative value of adjacent pixels having a small density difference is obtained in accordance with the characteristic that pixels of a constant density level are continuous, and is approximated to the density value that can be displayed on the display unit 1. Then, the process proceeds to step S208.

On the other hand, if it is determined in step S205 that it is not the character / line drawing portion, the process proceeds to step S207, in which the discrimination / complementation processing portion 15 displays the halftone image on the display portion 1 for the image data. Appropriate complement processing is performed. For example, it is converted into a smooth density change by a method such as taking a weighted average of densities between adjacent pixels, and approximated to the displayable data of the display unit 1. Then, the process proceeds to step S208.

In step S208, step S
With respect to the bit plane data received in 201, it is determined whether or not the complementary processing in steps S206 and S207 is completed. If the complementing process is completed for all the data of the bit plane, the process proceeds to step S209, but if it is not completed, the process returns to step S204, and the above-described process is repeated until it is completed for all the data of the bit plane.

In step S209, all the image data subjected to the complementary processing are transferred to the display unit 1 and displayed.

Then, in step S210, the operator confirms the received image displayed on the display unit 1 and determines whether or not the image can be output. This determination is input from the instruction input unit 6. In step S210, when the operator selects completion of complementation or an output request to the output unit 2 from the instruction input unit 6, that is, the received image on the display unit 1 has been confirmed, and the process proceeds to step S212.

On the other hand, when the operator determines in step S210 that the received data displayed on the display unit 1 needs some image processing, the operator processes the received image data or the received image data. An instruction such as a reception interruption instruction is input from the instruction input unit 6, and the process proceeds to step S2.
Proceed to 11. In step S211, the instruction input unit 6
The operator instruction information input to the image processing unit 17 is transmitted to the image processing unit 17 as selection information for various image processing operations.
Then, according to this selection information, the designated processing is performed on all or part of the area of the received image data, and then the process proceeds to step S212.

Then, in step S212, it is determined whether or not reception of all image data, that is, all bit planes has been completed. If it has ended, the process proceeds to step S213, but if it has not ended, the process returns to step S201, receives the data of the next bit plane, and repeats the processing described above.

Then, in step S213, all the image data are transferred to the output unit 2 and output.

The image processing performed by the image processing unit 17 in step S211 described above may be, for example, color conversion processing, partial clipping, or scaling processing such as enlargement / reduction for all or part of the received image data. And so on. However, the image processing in the image processing unit 17 is not limited to this example, and optimum image processing may be appropriately set according to each image processing apparatus, image data to be received, and the like.

Further, the image data output to the output unit 2 in the third embodiment is the optimum image data to be displayed on the display unit 1, but especially the image data is transmitted to the external device 8 or the like via the communication unit 3. In the case of transmitting, the image data may of course be subjected to an appropriate compression process.

As described above, according to the third embodiment,
By determining the characteristics of the entire image from the image data at the initial stage of communication, it is possible to perform the complementing process most suitable for display.

Further, there is an effect that the image processing desired by the operator can be performed even during the reception, and the processing for the image data can be decided at an early stage of communication. That is, it is not necessary for the operator to intervene until the reception of all the image data is completed.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of a single device. Further, it goes without saying that the present invention can be applied to the case where it is achieved by supplying a program to a system or an apparatus.

[0073]

As described above, according to the present invention, not only the color reproduction faithful to the original image can be realized by performing the color space compression processing suitable for the received image and then outputting it, but also during communication. It is possible to select and instruct the color space compression process for the received image. In addition, the operator can check the received image in the initial stage of communication, and it is possible to control image output and give instructions for image processing during communication.

Therefore, the operator need not intervene until the reception of all the image data is completed, and the desired image communication processing can be performed at higher speed.

[0075]

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an image processing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing image processing in this embodiment.

FIG. 3 is a diagram showing a configuration of a second embodiment image processing apparatus according to the present invention.

FIG. 4 is a flowchart showing image processing in the second embodiment.

FIG. 5 is a diagram showing a configuration of a third embodiment image processing apparatus according to the present invention.

FIG. 6 is a flowchart showing image processing in the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 display part 2 output part 3 communication part 4 image expansion part 5 detection part 6 instruction input part 7 color space compression part 8 external device 9 CPU bus 10 image processing device 11 RAM 12 ROM 13 image prediction part 15 discrimination / complementation processing part 17 Image processing unit 20 CPU

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location H04N 1/60 1/41 C 1/46 H04N 1/40 D 1/46 Z

Claims (16)

[Claims] 1. An input unit for inputting compressed image data, a decompressing unit for decompressing the image data input by the input unit, a color reproduction range of the image data decompressed by the decompressing unit is detected, An image processing apparatus comprising: a determination unit that determines whether the image output device is within a color reproduction range, and a color space compression unit that performs a color space compression process according to the determination result of the determination unit. 2. An instruction input means for inputting a selection instruction, and a display means for displaying at least two different color space compression processes when the determination means determines that there is image data outside the color reproduction range. The image processing apparatus according to claim 1, wherein, when the color space compression processing displayed on the display means is selected by the instruction input means, the color space compression processing instructed to be selected is performed. 3. A color reproducibility predicting unit for predicting color reproducibility of the entire image by inputting image data from the input unit step by step in the order of including much feature information relating to color reproduction, The means for predicting color reproducibility from the image data input at an early stage of the input means and detecting image data outside the color reproduction range of the image output device based on the color reproducibility of the entire image. Item 3. The image processing device according to item 1 or 2. 4. Input means for inputting the compressed image data stepwise in the order of including much feature information relating to color reproduction, and color reproduction for predicting color reproducibility of the entire image from the stepwise input image data. According to the display capability of the display means according to the discrimination result by the discrimination means, the discrimination means for discriminating the type of image data based on the color reproducibility predicted by the color reproducibility prediction means, An image processing apparatus comprising: a complementing unit that performs a complementing process, and a display unit that displays the image data that has been complemented by the complementing unit. 5. An instruction input means for inputting an instruction, a processing means for performing various types of processing on the image data displayed on the display means based on the instruction input, and an image based on the instruction input. The image processing apparatus according to claim 4, further comprising an output unit that outputs data. 6. The image processing apparatus according to claim 3, wherein the input unit sequentially inputs the image data at a stage where the quantization accuracy of the color components of the image data is coarse. 7. The image processing apparatus according to claim 1, wherein the input unit receives the code-compressed image data from an external device and inputs the image data. 8. The output means outputs the image data by transmitting the image data to an external device.
The image processing device described. 9. An input step of inputting compressed image data, a decompression step of decompressing the image data input by the input step, a color reproduction range of the image data decompressed by the decompression step is detected, An image processing method comprising: a determination step of determining whether or not it is within a color reproduction range of the image output device; and a color space compression step of performing a color space compression process according to the determination result of the determination step. . 10. An instruction input step in which an operator inputs a selection instruction, and a display step of displaying at least two different color space compression processes when the determination step determines that there is image data outside the color reproduction range. 10. The image processing according to claim 9, further comprising: when the color space compression processing displayed in the display step is selected by the instruction input step, the color space compression processing instructed by the selection is performed. Method. 11. A color reproducibility prediction step of predicting color reproducibility of an entire image by stepwise inputting image data in the order of including a large amount of characteristic information regarding color reproduction in the input step. The step is characterized in that the color reproducibility is predicted from the image data input at an early stage of the input step, and the image data outside the color reproduction range of the image output device is detected from the color reproducibility of the entire image. Item 11. The image processing method according to item 9 or 10. 12. An input step of inputting compressed image data step by step in the order of including much feature information relating to color reproduction, and color reproduction for predicting color reproducibility of the entire image from the stepwise input image data. Sex prediction step, a discrimination step of discriminating the type of image data based on the color reproducibility predicted in the color reproduction prediction step, and a complement according to the display capability of the display step according to the discrimination result by the discrimination step An image processing method comprising: a complementing step of performing processing, and a display step of displaying image data subjected to the complementing processing by the complementing step. 13. An instruction input step in which an operator inputs an instruction, a processing step in which various processing processes are performed on the image data displayed in the display step based on the instruction input, and the instruction input The image processing apparatus according to claim 12, further comprising an output step of outputting image data based on the image data. 14. The image processing apparatus according to claim 11, wherein in the input step, image data at a stage in which quantization accuracy of color components of image data is coarse is sequentially input. 15. The image processing method according to claim 9, wherein the inputting step is performed by receiving code-compressed image data from an external device. 16. The image processing method according to claim 13, wherein in the output step, the image data is output by transmitting the image data to an external device.