JP2000261801A - Image processing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processing unit that applies proper processing to image data by recognizing compression processing information. SOLUTION: The image processing unit is provided with a reception means 1 that receives image data that are compressed or not compressed and processing information when the data are compressed or not compressed, an expansion processing means 2 that applies expansion processing to the received image data to image data before the compression processing when the image data are compressed image data, an information recognition means 3 that recognizes the processing information, a 1st image processing means 4 and a 2nd image processing means 5 that apply image processing to the received non compression image data or the expanded image data, and a processing changeover means 6 that selects any image processing of the 1st image processing means or the 2nd image processing means. The 1st image processing means processing image data at a higher speed than that of the 2nd image processing means and the 2nd image processing means processes the image data with higher accuracy than that of the 1st image processing means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recognizing compression processing information by receiving compressed image data by an image processing apparatus having a decompression function in order to increase the efficiency of data transmission of videophones, originals, moving images, and the like. The present invention relates to an image processing apparatus that performs image processing suitable for image data based on a result.

[0002]

2. Description of the Related Art In a conventional image processing apparatus having a decompression function, the processing speed has been improved by reducing the accuracy of filter processing on compressed image data (see Japanese Patent Laid-Open No. 6-22318). On the other hand, some image processing apparatuses are provided with a distortion correction circuit so as not to cause image deterioration even if the processing speed is sacrificed for the compressed image data. However, if the same image processing is performed on all the compressed image data, sometimes the originally desired processing accuracy or processing speed may be greatly sacrificed.

[0003]

SUMMARY OF THE INVENTION Therefore, the problem to be solved by the present invention is that the recognition result of processing information when no compression or compression processing is performed without unilaterally sacrificing processing accuracy or processing speed. An object of the present invention is to provide an image processing apparatus that performs a process suitable for image data based on the image data.

[0004]

According to an aspect of the present invention, there is provided an image processing apparatus according to the present invention, wherein uncompressed or compressed image data and the image data are uncompressed or compressed. Receiving means for receiving processing information indicating that processing has been performed, and expanding processing means for expanding the image data before compression processing when the image data received by the receiving means is compressed image data; and ,
An information recognizing means for recognizing the processing information received by the receiving means; and a first image processing means or a first image processing means for performing image processing on the received uncompressed image data or the image data decompressed by the decompression processing means. 2 image processing means, and processing switching means for switching to one of the first image processing means or the second image processing means based on the recognition result of the information recognition means, The first image processing means processes image data at a higher speed than the second image processing means, and the second image processing means processes the image data with a higher accuracy than the first image processing means. It is assumed that. Further, in the invention according to claim 2, in the image processing apparatus according to claim 1, the processing switching means determines whether or not the recognition result of the processing information by the information recognition means is recognized as lossy compression. And switching to one of the first image processing means and the second image processing means. According to a third aspect of the present invention, in the image processing apparatus according to the first aspect, the processing switching unit determines whether a recognition result of the processing information by the information recognizing unit is recognized as irreversible compression or is determined as lossless compression. The process is switched to either one of the first image processing means or the second image processing means based on recognition.

According to the invention described in claim 4, according to claim 1,
In the image processing apparatus described above, the processing switching unit is configured to output one of the first image processing unit and the second image processing unit based on a recognition result of a compression method in the processing information by the information recognition unit. Is switched to the processing of (1). In the invention according to claim 5,
2. The image processing apparatus according to claim 1, wherein the processing switching unit is configured to perform the first processing based on whether a recognition result of the processing information by the information recognition unit is recognized as being compressed by block coding. 3. The processing is switched to one of the image processing means and the second image processing means. In the invention according to claim 6,
2. The image processing apparatus according to claim 1, wherein the processing switching unit recognizes a recognition result of the processing information by the information recognizing unit as image data at a block boundary portion of the block coding or image data inside the block. The processing is switched to either one of the first image processing means and the second image processing means based on the operation. According to the invention described in claim 7, according to claim 2,
In the image processing apparatus described in the above, the processing switching means switches to the first image processing means when the recognition result of the processing information by the information recognition means is recognized as irreversible compression, and the recognition result is irreversible. A switch is made to the second image processing means upon recognition of something other than compression. In the image processing apparatus according to the eighth aspect, in the image processing apparatus according to the third aspect, the processing switching unit is configured to execute the first processing by recognizing a recognition result of the processing information by the information recognizing unit as irreversible compression.
And switching to the second image processing means when the recognition result is recognized as lossless compression. In the ninth aspect of the present invention, in the image processing apparatus according to the fourth aspect, the processing switching unit is configured to execute the first processing by recognizing a recognition result of the processing information by the information recognition unit as a JPEG compression method. And switching to the second image processing means when the recognition result is recognized as a method other than the JPEG compression method. In the image processing apparatus according to the tenth aspect, in the image processing apparatus according to the fifth aspect, the processing switching unit is configured to perform the first processing by recognizing the recognition result of the processing information by the information recognizing unit as block coding. And switching to the second image processing means when the recognition result is recognized as something other than block coding. Also, in the image processing apparatus according to the eleventh aspect, in the image processing apparatus according to the sixth aspect, the processing switching unit recognizes that the recognition result of the processing information by the information recognizing unit is image data of a block boundary of block coding. And switching to the second image processing means when the recognition result is recognized as image data inside the block.

According to the first aspect of the present invention, the first image processing means capable of processing image data at high speed and the second image processing means capable of processing image data with high accuracy are provided by an information processing apparatus. Since the processing is switched by the processing switching means based on the recognition result of the recognition means, when the information recognizing means recognizes that the image data is suitable for high-speed processing, it is processed by the first image processing means, and the high-precision processing is performed. When it is recognized that the image data is suitable for processing, it can be processed by the second image processing means. According to a second aspect of the present invention, in addition to the image processing apparatus of the first aspect, the first processing is performed by the processing switching unit based on the recognition result of the information recognition unit as to whether or not the lossy compression is performed. Since the processing is switched to either the image processing means or the second image processing means, high-speed processing and high-speed processing can be performed between the irreversibly compressed image data and the non-compressed or losslessly compressed image data. Processing divided into precision processing can be performed. Claim 3
According to the invention of the first aspect, in addition to the invention of the image processing apparatus constructed as in claim 1, the first image processing means is provided by the processing switching means based on the recognition result of the information recognizing means of irreversible compression or reversible compression. Alternatively, since the processing is switched to either one of the second image processing means, the processing divided into high-speed processing and high-precision processing can be performed on the irreversibly compressed image data and the losslessly compressed image data. Can be applied. Also,
According to a fourth aspect of the present invention, in addition to the invention of the image processing apparatus configured as in the first aspect, the first image processing unit or the first image processing unit or the second Since the processing is switched to either one of the two image processing means, it is possible to perform processing divided into high-speed processing and high-precision processing depending on the content of the compression method.

According to a fifth aspect of the present invention, in addition to the image processing apparatus of the first aspect, whether or not the image data is compressed by the process recognizing means by block coding of the information recognizing means is determined. Is switched to either the first image processing means or the second image processing means on the basis of the recognition result. Processing divided into precision processing can be performed. According to a sixth aspect of the present invention, in addition to the invention of the image processing apparatus configured as in the first aspect, the processing switching means determines whether the image data at the block boundary of the information recognizing means or the image data inside the block. Since the processing is switched to either the first image processing means or the second image processing means based on the recognition result, high-speed processing can be performed depending on whether the image data is at the block boundary or within the block. Processing divided into high-precision processing can be performed. According to a seventh aspect of the present invention, in addition to the image processing apparatus according to the second aspect, the first image processing unit is configured such that the information recognizing unit recognizes the lossy compression by the process switching unit. , And switches to the second image processing means by recognizing that the image data is not irreversible compression. Therefore, high-precision processing cannot be expected for irreversibly compressed image data, so that high-speed processing is performed. Since high-precision processing can be expected for non-compressed or lossless-compressed image data other than the above, high-precision processing is performed even if the processing speed decreases.

According to an eighth aspect of the present invention, in addition to the image processing apparatus according to the third aspect of the present invention, the information recognizing means recognizes the lossy compression by the processing switching means. Switching to the image processing means and switching to the second image processing means by recognizing lossless compression, processing is performed at high speed because high precision processing cannot be expected with irreversibly compressed image data. Since high-accuracy processing can be expected with the processed image data, high-accuracy processing is performed even if the processing speed is reduced. According to a ninth aspect of the present invention, in addition to the image processing apparatus according to the fourth aspect of the present invention, the information recognizing means is realized by the processing switching means.
The image data compressed by the JPEG compression method is switched to the first image processing means by recognizing the method as the PEG compression method, and switched to the second image processing means by recognizing the method other than the JPEG compression method. High-precision processing cannot be expected in
Since high precision processing can be expected for image data other than the PEG compression method, processing is performed with high precision even if the processing speed is reduced. According to a tenth aspect of the present invention, in addition to the image processing apparatus of the fifth aspect, the processing switching means
Since the information recognizing unit switches to the first image processing unit by recognizing that the block encoding is performed, and switches to the second image processing unit by recognizing that it is not the block encoding. Since high-precision processing cannot be expected for the processed image data, high-speed processing is performed. For image data other than block coding, high-precision processing can be expected. According to an eleventh aspect of the present invention, in addition to the invention of the image processing apparatus configured as in the sixth aspect, the information recognizing means recognizes the image data at the block boundary of the block coding by the processing switching means. Is switched to the first image processing means, and is switched to the second image processing means by recognizing the image data inside the block. , And high-precision processing can be expected for the image data inside the block. Therefore, even if the processing speed is reduced, the processing is performed with high precision.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a main part of an image processing apparatus 9 according to the present invention. In FIG. 1, in order to make the operation of the image processing device 9 easier to understand, an image input device 2 that transmits uncompressed or compressed image data and processing information when the uncompressed or compressed process is performed.
0 is also shown. First, a document or image data is input to the image input unit 21 of the image input device 20. If the document is a document, the image on the document is read by the image input unit 21, converted into image data, and input processed. During the input process, output image data without compression,
Alternatively, whether to output the compressed image data is determined in advance. If image data is input to the image input section 21, the input image data is input processed by the image input section 21, but the image data is output without compression in the same manner as described above. It is already determined whether to output the obtained image data. Also, the image input unit 2
1 is a non-compression process or a compression process, and if it is a compression process, details of the compression process are described in the input process information section 2.
2 is transmitted. The transmission unit 23 receives the image data input processed from the image input unit 21 and the processing information at the time of non-compression or compression processing from the input processing information unit 22 and transmits the image data to the next-stage image processing apparatus 9. The transmission form of the image data and the processing information may be transmitted as separate pieces of information via different routes, or may be transmitted at a time with the processing information added to the header of the image data. The image processing device 9
Then, the image data sent from the image input device 20 and the processing information on the non-compression or compression processing are received by the receiving unit 1 as the receiving means. The receiving unit 1 divides the received data into image data and processing information, and gives the processing information to an information recognizing unit 3 as information recognizing means. Further, although not shown, it has a buffer for one line or more for storing received data, and the received data is temporarily stored in the buffer. The information recognizing unit 3 recognizes the content of the received processing information, and determines whether the image data sent from the image input device 20 is uncompressed image data or compressed image data, and further, If the image data has been subjected to compression processing, it is possible to recognize information such as what kind of compression method is used.
Further, the information recognizing unit 3 transmits the image data received by the receiving unit 1 based on the content of the recognized processing information to the process switching unit 6 as the process switching unit if the image data is not compressed. If so, it is transmitted to the expansion processing unit 2 as expansion processing means. Upon receiving the compressed image data, the decompression processing unit 2 decompresses the compressed image data recognized by the information recognition unit 3 to restore the pre-compression image data, and transmits the decompressed image data to the processing switching unit 6. Here, the process switching unit 6 receives the uncompressed image data or the image data decompressed by the decompression processing unit 2,
It plays a role of transmitting the signal to the first image processing unit 4 as the first image processing unit emphasizing high-speed processing or to the second image processing unit 5 as the second image processing unit emphasizing high-accuracy processing. ing. The image data received by the process switching unit 6 is
Which one of the image processing units and the second image processing unit is transmitted is based on the recognition result of the processing information recognized by the information recognition unit 3. That is, in the process switching unit 6, the image data to be subjected to image processing based on the recognition result of the information recognition unit 3 is processed by the first image processing unit 4.
, Or the second image processing unit 5 switches the processing. The image data processed by the first image processing unit 4 or the second image processing unit 5 is transmitted to an image output device such as a printer (not shown) via an image processing output unit 7 and output to a medium. You.

FIG. 2 is an example showing the contents of the image processing section 10 in more detail. The image processing unit 10 includes the first image processing unit 4 and the second image processing unit 5 in FIG. Although not shown in FIG. 2, the image processing unit 10 also includes the processing switching unit 6 shown in FIG. Here, the operation of the image processing unit 10 will be briefly described. First, the image processing of the image processing unit 10 is roughly divided into a filter processing unit 11, a density conversion processing unit 12, a γ (gamma) conversion processing unit 13, a color conversion processing unit 14, a halftone processing unit 15, and an image processing unit. It is composed of an area separating unit 16 and the like.
Further, the uncompressed image data or the image data decompressed by the decompression processing unit 2 is first input to the filter processing unit 11 and the image area separation unit 16 of the image processing unit 10. The image area separating unit 16 uses the input image data to determine whether the image attribute of the input image is a region having an edge portion such as a character or a line drawing, or a region having a halftone portion which is a halftone print image. Alternatively, it is determined whether the area is a picture area having a continuous tone portion such as a photograph. Further, according to the image area separation result of the image area separation section 16, the filter processing section 11, the density conversion processing section 12, the γ (gamma) conversion processing section 13, the color conversion processing section 1
4. Each processing unit such as the halftone processing unit 15 performs different processing. Further, the filter processing unit 11 performs a conversion process of the spatial frequency of the image by correcting the MTF (Modulation Transfer Function) characteristic deteriorated by the scanner or by performing a filter process for reducing the moire generated in the halftone print document. Further, the density conversion processing unit 12 performs the resolution conversion processing when there is a difference between the input resolution and the output resolution, or when the input image needs enlargement / reduction scaling processing. Further, the γ conversion processing unit 13 performs a conversion process of the gradation characteristics of the image data so as to obtain a desired gradation characteristic. Further, the color conversion processing unit 14 performs a conversion process of changing the RGB input image from the scanner into CMYK data which is a reproduction color of the printer. The halftone processing unit 15 performs conversion processing such as systematic dither processing and error diffusion processing according to the output characteristics of the printer. Further, the image data processed by each processing unit is transmitted from the image processing unit 10 to an image output device (not shown), and is output on a medium such as paper by the image output device. Here, for example, when the information recognizing unit 3 recognizes that the uncompressed image data is input to the image processing unit 10, the information recognizing unit 3 converts the image data into the high-precision image data shown in the second image processing unit 5 in FIG. A process that emphasizes high accuracy such as a process is performed. Conversely, when the information recognizing unit 3 recognizes that the image data compressed irreversibly has been input to the image processing unit 10, the information recognizing unit 3 converts the image data into the first data in FIG.
A process emphasizing high speed such as the high speed process shown in the image processing unit 4 is executed. Accordingly, the filter processing unit 11 of the image processing unit 10 performs high-precision processing of applying a filter to uncompressed image data by a convolution operation in a real space, and performs irreversible compression on image data. Since a sufficient effect cannot be expected by the filtering process, the process is skipped and transmitted to the next stage at high speed. In the density conversion processing unit 12 in the next stage, for uncompressed image data, high-precision processing of resolution conversion by a three-dimensional function convolution method in which converted information of a certain pixel is obtained from information of 16 points around the pixel. Irreversibly compressed image data, the converted information of a certain pixel is obtained by high-speed processing of a linear interpolation method for obtaining information from four surrounding points.
In the γ (gamma) conversion processing unit 13, for example, for image data given with 8 bits per pixel to express the characteristics of a certain pixel, the same 8 bits as the image data for uncompressed image data To perform high-precision processing, and perform high-speed processing on lossy-compressed image data using only the upper 5 bits. Similarly, the color conversion processing section 14 performs high-precision color conversion processing on non-compressed image data, and performs high-speed color conversion processing on irreversibly compressed image data. ing. Similarly, the halftone processing unit 15 performs high-precision halftone processing on non-compressed image data, and performs high-speed halftone processing on irreversibly compressed image data. . Further, in the image area separating unit 16, for the uncompressed image data, the image attribute of the input image is a region having an edge portion such as a character or a line drawing, or a halftone portion which is a halftone print image. Performs high-precision processing to separate the image data into regions that have a continuous tone portion, such as photographs, etc., and has edge portions such as characters and line drawings for irreversibly compressed image data. High-speed processing is performed to separate the image into a region or a picture region having a continuous tone portion such as a photograph. Further, in FIG. 2 described above, as an example of recognition by the information recognition unit 3, a case where non-compressed image data and lossy-compressed image data are recognized,
The difference in the processing method due to the difference in recognition was explained, but other recognition of lossy compression or not, recognition of lossy or lossless compression, recognition of compression method, and whether or not it was compressed by block coding It is the same that there is a difference in the processing method due to the difference in the recognition of the image data at the block boundary of the block coding or the image data inside the block. FIG. 3 is a diagram showing image data of a block boundary portion and image data inside a block in an easy-to-understand manner when 8 × 8 pixels are treated as one block. One block of 8 × 8 pixels is indicated by Mm, Nm, Mn, and Nn, and a black portion corresponds to a block boundary.

FIGS. 4 to 8 are flowcharts showing main operations of the image processing apparatus 9 of the present invention. In FIG. 4, the information recognizing unit 3 recognizes whether or not the image data to be processed is image data that has been subjected to lossy compression (Step S).
1). The recognition result is checked, and an inquiry is made as to whether or not the image data is lossy-compressed image data (S2). If the image data is irreversibly compressed (S2 YES), the image data to be processed is processed by the first image processing unit 4 for high-speed processing (S3). In step S2, if the image data is not lossy-compressed image data (S2 NO) but is non-compressed image data or lossless-compressed image data, the image data to be processed is converted to a second image processing unit of high-precision processing. 5 (S4), and the flow ends. In FIG. 5, the information recognizing unit 3 recognizes whether the image data to be processed is irreversibly compressed image data or losslessly compressed image data (S11). The recognition result is checked, and an inquiry is made as to whether the image data is irreversibly compressed image data (S12). If the image data is lossy-compressed (S12 YE
S), the image data to be processed is processed by the first image processing unit 4 for high-speed processing (S13). In step S12, if the image data is not lossy-compressed image data but lossless-compressed image data (S12 NO), the image data to be processed is processed by the second image processing unit 5 of the high-precision processing (S14). ), Finish the flow.

In FIG. 6, the information recognizing unit 3 recognizes the compression method of the image data to be processed (S2).
1). The recognition result is checked, and an inquiry is made as to whether the compression method of the image data to be processed is the JPEG method (S22). If it is the JPEG system (S22 YES), the image data to be processed is processed by the first image processing unit 4 for high-speed processing (S23). In step S22,
If the compression method of the image data to be processed is not the JPEG method (S22 NO), the image data to be processed is processed by the second image processing unit 5 of the high precision processing (S24), and the flow ends. In FIG. 7, the information recognizing unit 3 recognizes whether or not the image data to be processed is block-coded (S31). The recognition result is checked, and an inquiry is made as to whether the image data to be processed is block-coded (S32). If the image data is block-coded (S32: YES), for example, the image data to be processed is subjected to a smoothing filter process in order to make the block noise inconspicuous, and is processed by the first image processing unit 4 for high-speed processing. (S33). In step S32, if the image data to be processed is not block-coded (NO in S32), for example, the image data to be processed is not subjected to the smoothing filter processing, and the second image processing unit of the high precision processing is performed. 5 (S34), and the flow ends. 8, the information recognizing unit 3 recognizes whether the image data to be processed is the image data at the block boundary or the image data inside the block (S41). The recognition result is checked, and an inquiry is made as to whether the image data to be processed is image data at the block boundary (S42). If it is the image data of the block boundary (S42 YES), for example,
Smoothing filter processing is added to make the block noise inconspicuous, and the first image processing unit 4 for high-speed processing processes (S43). In step S32, if the image data to be processed is not the image data at the block boundary but the image data inside the block (S42 NO), for example, the smoothing filter processing is not performed on the image data to be processed, The second image processing unit 5 of the accuracy processing causes processing (S4
4) End the flow.

[0013]

As described above, according to the image processing apparatus of the first aspect, when the information recognizing means recognizes that the image data is suitable for high-speed processing, the information is processed by the first image processing means. When it is recognized that the image data is suitable for high-precision processing, the image data can be processed by the second image processing means. Therefore, image processing for performing processing suitable for each of uncompressed and compressed image data Equipment can now be provided. According to the invention of claim 2, in addition to the invention of the image processing apparatus of claim 1, the image data subjected to lossy compression and the image data subjected to no compression or lossless compression are divided into high-speed processing and high-precision processing. It is possible to provide an image processing apparatus for performing the above-described processing. According to the invention of claim 3,
In addition to the invention of the image processing apparatus according to claim 1, there is provided an image processing apparatus that performs processing of high-speed processing and high-precision processing on irreversibly compressed image data and losslessly compressed image data. Now you can. According to the invention of claim 4, in addition to the invention of the image processing apparatus of claim 1, it is possible to provide an image processing apparatus that performs processing divided into high-speed processing and high-precision processing according to the content of the compression method. became. According to the invention of claim 5, in addition to the invention of the image processing apparatus of claim 1, an image processing apparatus for performing processing divided into high-speed processing and high-precision processing depending on whether or not the image is compressed by block coding is provided. Can now be offered.
According to the invention of claim 6, in addition to the invention of the image processing apparatus of claim 1, image processing for performing processing divided into high-speed processing and high-precision processing depending on whether block boundary data of block coding or data inside a block is used. Equipment can now be provided. According to the seventh aspect of the present invention, in addition to the image processing apparatus of the second aspect, irreversibly compressed image data is processed at high speed, and non-lossy or losslessly compressed image data other than lossy compression is processed. It has become possible to provide an image processing apparatus that performs processing with high accuracy. According to the invention of claim 8, in addition to the invention of the image processing apparatus of claim 3, an image processing apparatus for processing lossy-compressed image data at high speed and processing lossless-compressed image data with high accuracy Can now be offered. According to the ninth aspect of the present invention,
In addition to the invention of the image processing apparatus according to claim 4, image data compressed by the JPEG compression method is processed at high speed,
It has become possible to provide an image processing apparatus for processing image data other than the EG compression method with high accuracy. According to the tenth aspect of the present invention, in addition to the image processing apparatus of the fifth aspect, image data compressed by block encoding is processed at high speed, and image data other than block encoding is processed with high accuracy. An image processing device can be provided. According to the eleventh aspect of the present invention, in addition to the image processing apparatus of the sixth aspect, there is provided an image processing apparatus for processing image data at a block boundary portion at high speed and processing image data inside a block with high accuracy. You can now.

[Brief description of the drawings]

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

FIG. 2 is a block diagram illustrating an image processing unit of the image processing apparatus according to the embodiment shown in FIG. 1 in detail;

FIG. 3 is an explanatory diagram for explaining the distinction between a block boundary portion and the inside of a block when 8 × 8 pixels are regarded as one block.

FIG. 4 is a flowchart showing a main operation for switching image processing depending on whether image data is irreversibly compressed in the image processing apparatus of the present invention.

FIG. 5 is a flowchart showing a main operation of switching image processing depending on whether image data is irreversibly compressed or losslessly compressed in the image processing apparatus of the present invention.

FIG. 6 is a flowchart showing a main operation of switching image processing by a compression method of image data to be processed in the image processing apparatus of the present invention.

FIG. 7 is a flowchart showing a main operation of switching image processing depending on whether or not block coding is performed in the image processing apparatus of the present invention.

FIG. 8 is a flowchart showing a main operation of switching image processing depending on whether a block boundary or image data inside a block is used in the image processing apparatus of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Receiving part (receiving means), 2 expansion processing part (expansion processing means), 3 information recognizing part (information recognizing means), 4 first image processing part (first image processing means), 5 second image processing part ( Second image processing means), 6 processing switching section (processing switching means), 7 image processing output section, 9 image processing apparatus, 10
Image processing unit, 11 filter processing unit, 12 density conversion processing unit, 13 gamma conversion processing unit, 14 color conversion processing unit, 1
5 halftone processing section, 16 image area separation section, 20 image input device, 21 image input section, 22 input processing information section, 23
Transmitter

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Shibaki 1-3-6 Nakamagome, Ota-ku, Tokyo F-term in Ricoh Co., Ltd. (Reference) 5C059 KK11 MA00 MA45 PP01 PP04 SS07 SS15 TA17 TB08 TC27 TC33 TC50 TD13 UA05 UA11 UA39 5C078 BA21 BA44 CA02 CA21 CA31 DA02

Claims (11)

[Claims] 1. A receiving means for receiving uncompressed or compressed image data and processing information indicating that the image data is uncompressed or compressed, and image data received by the receiving means. If is compressed image data, decompression processing means for decompressing the image data before compression processing, information recognition means for recognizing the processing information received by the receiving means, and received uncompressed image data A first image processing unit or a second image processing unit for performing image processing on image data expanded by the expansion processing unit; and the first image processing based on a recognition result of the information recognition unit. Means for switching to one of the image processing means and the second image processing means, wherein the first image processing means is the same as the second image processing means. Processing the image data at high speed, the second image processing means image processing apparatus characterized by processing the image data from the first image processing means highly accurately. 2. The first image processing unit or the second image processing according to whether or not a recognition result of the processing information by the information recognition unit is recognized as irreversible compression. 2. The image processing apparatus according to claim 1, wherein the image processing is switched to any one of the means. 3. The method according to claim 1, wherein the processing switching unit performs the first processing according to whether the recognition result of the processing information by the information recognition unit is recognized as lossy compression or lossless compression.
2. The image processing apparatus according to claim 1, wherein the processing is switched to either one of the image processing means and the second image processing means. 4. The processing switching means according to claim 1, wherein said information recognizing means recognizes a compression method in said processing information, and performs processing of one of said first image processing means and said second image processing means. The image processing apparatus according to claim 1, wherein the image processing apparatus is switched to: 5. The first image processing unit or the first image processing unit according to whether or not the recognition result of the processing information by the information recognition unit is recognized as being compressed by block coding. 2. The image processing apparatus according to claim 1, wherein the processing is switched to any one of the second image processing means. 6. The processing switching means according to whether the recognition result of the processing information by the information recognizing means is recognized as image data of a block boundary portion of block coding or image data in a block. 2. The image processing apparatus according to claim 1, wherein the processing is switched to one of the first image processing means and the second image processing means. 7. The processing switching means switches to the first image processing means when a recognition result of the processing information by the information recognizing means is recognized as irreversible compression, and the recognition result is other than irreversible compression. The image processing apparatus according to claim 2, wherein the image processing apparatus switches to the second image processing means when the image processing apparatus recognizes that the image processing apparatus has been operated. 8. The processing switching means switches to the first image processing means when the recognition result of the processing information by the information recognition means is recognized as lossy compression, and the recognition result is recognized as lossless compression. The image processing apparatus according to claim 3, wherein the image processing apparatus switches to the second image processing unit by performing the operation. 9. The processing switching means switches to the first image processing means when a recognition result of the processing information by the information recognizing means is recognized as a JPEG compression method, and the recognition result is other than a JPEG compression method. The image processing apparatus according to claim 4, wherein the image processing apparatus switches to the second image processing unit when the image processing apparatus recognizes that the image processing apparatus has been operated. 10. The processing switching means switches to the first image processing means when a recognition result of the processing information by the information recognizing means is recognized as block coding, and the recognition result is other than block coding. The image processing apparatus according to claim 5, wherein the image processing apparatus switches to the second image processing unit when the image processing apparatus recognizes that the image processing apparatus has been operated. 11. The processing switching means switches to the first image processing means when a recognition result of the processing information by the information recognizing means is recognized as image data at a block boundary part of block coding, 7. The image processing apparatus according to claim 6, wherein the switching to the second image processing means is performed when a recognition result is recognized as image data inside the block.