JP7266462B2 - IMAGE PROCESSING APPARATUS, IMAGE FORMING APPARATUS, IMAGE PROCESSING METHOD AND PROGRAM - Google Patents

Description

The present disclosure relates to an image processing device and the like.

In addition to conventional analog image forming devices such as electronic copiers, digital types are becoming more popular, and with the advancement of digital image processing technology, full-color digital copiers that reproduce color images with high image quality are becoming popular. It has been commercialized.

One of the various documents is a document containing fluorescent colors. The paper is colored with a highlighter pen or the like, and organic phosphors are widely used for the highlighter pen.

In the case of a CCD (Charge Coupled Device) system, which is a reduction optical system, for a color scanner used in a digital copier, a white LED (light emitting diode) is irradiated, and the reflected RGB light is received by RGB sensors. When a portion colored with a fluorescent pen is irradiated with a white LED, fluorescence (excitation light) is generated in addition to normal reflected light, and reflected light of G and R components increases. That is, the excitation light is read by the R sensor and G sensor. Therefore, when reading a red or yellow fluorescent colored portion, the values of the R and G components become extremely large, and pixel data of color components that do not appear when reading a general printed matter is obtained.

For example, in Patent Document 1, it is determined whether or not an input document contains a fluorescent color, and color conversion is performed by switching preset color processing parameters according to the determination result. Further, based on the read data of the original, it is locally determined whether or not the color is a fluorescent color, and color conversion is performed by switching preset color processing parameters according to the determination result.

JP-A-7-177368

However, there is a color scanner of a contact image sensor (CIS) sequential lighting system, which is a contact optical system, in addition to the CCD system. The CIS sequential lighting method differs from the CCD method in the detection sensitivity of each RGB color component. First, the blue LED is irradiated and the reflected light is read by the sensor as the B component signal, then the green LED is irradiated and the reflected light is read as the G component signal by the sensor, and then the red LED is irradiated. A sensor reads the reflected light as an R component signal. In addition, since the light reflected by the blue LED is read including the excitation light in the green and red regions, the B component is amplified. As a result, the color of the fluorescent colored portion becomes brighter and less saturated.

Therefore, the color of the fluorescent colored portion does not become pixel data of a color component that does not appear when a general printed matter is read, and it is impossible to determine whether or not it is a fluorescent colored portion.

In addition, the color processing parameters for color conversion can be set in advance for fluorescent colored originals separately from those for general originals, and can be switched according to the conditions specified by the user (for example, highlighter pen mode, manual exposure setting). Possible, but requires a lot of memory.

One of the objects of the present disclosure is to perform a simple one-dimensional correction of luminance and chromaticity on a manuscript including a fluorescent colored portion, which is different from that for a general manuscript, so that the color reproduction of the fluorescent colored portion is suitable. It is intended to be

An image processing apparatus according to the present disclosure includes an image input unit for inputting image data read by a contact optical system (CIS) method, and a control unit, wherein the control unit performs , a first mode in which normal image processing is performed, and a second mode in which image processing suitable for reproducing the color or density of the fluorescent colored portion is provided, and when the second mode is set and correcting the image data to increase the saturation of image data having low saturation.

An image forming apparatus of the present disclosure includes an image input unit that inputs first image data read by a contact optical system (CIS) method, performs image processing on the first image data, and performs second image processing. In an image forming apparatus having a processing section that outputs image data and an image forming section that forms an image based on the second image data, the processing section performs normal image processing on the first image data. It has a first mode for performing image processing and a second mode for performing image processing suitable for reproducing the color or density of the fluorescent colored portion. 1, correction is performed to increase the saturation of low-saturation image data.

An image processing method of the present disclosure is an image processing method in an apparatus having an image input unit for inputting image data read by a contact optical system (CIS) method, and a control unit, wherein the image data is: It has a first mode for performing normal image processing and a second mode for performing image processing suitable for reproducing the color or density of the fluorescent colored portion, and when the second mode is set, The image data is corrected to increase the saturation of image data with low saturation.

A program of the present disclosure is a computer having an image input unit for inputting image data read by a contact optical system (CIS) method, and a control unit. and a second mode in which image processing suitable for reproducing the color or density of the fluorescent colored portion is executed. It is characterized by executing a correction function for increasing the saturation of the saturation image data.

By performing a simple one-dimensional correction of luminance and chromaticity, which is different from that for a general document, on an original including a fluorescent colored portion, the color reproduction of the fluorescent colored portion can be made suitable. .

It is a figure for demonstrating the structure in 1st Embodiment. FIG. 4 is a diagram for explaining image correction in the first embodiment; FIG. 4 is a diagram for explaining image correction in the first embodiment; It is a figure for demonstrating the structure in 2nd Embodiment. It is a figure for demonstrating the operation|movement in 3rd Embodiment.

An embodiment for implementing an image forming apparatus and the like of the present disclosure will be described below with reference to the drawings. Note that the following embodiment is an example for explanation, and the technical scope of the invention described in the claims is not limited to the following description.

[1. First Embodiment]
FIG. 1 is a block diagram showing a schematic configuration of an image forming apparatus 1 according to this embodiment. In this embodiment, a case where the image forming apparatus 1 is an electrophotographic digital color copying machine will be described, but the configuration of the image forming apparatus 1 is not limited to this. Any device may be used as long as it has a function of performing processing.

The image forming apparatus 1 includes a control section 10, a color image input device 20, a color image processing device 30, a color image output device 40, an operation panel 50 and a storage section 60, as shown in FIG.

The color image processing device 30 includes an A/D (analog/digital) conversion unit 302, a shading correction unit 304, an area separation processing unit 306, a first color space conversion unit 308 for converting the RGB to YCbCr color space, A YCbCr correction unit 310, a spatial filter processing unit 312, a second color space conversion unit 314 that converts the YCbCr to RGB color space, a color correction unit 316, a black generation undercolor removal unit 318, an output gradation correction unit 320, a gradation A tone reproduction processing unit 322 is provided.

The color image input device 20 reads a document, generates image data of the document, and outputs the generated image data to the color image processing device. The configuration of the color image input device includes a scanner unit (not shown) equipped with a CIS (Contact Image Sensor), which is a contact optical system. : red, G: green, and B: blue).

The color image processing device 30 converts the image data input from the color image input device 20 into an A/D converter 302, a shading corrector 304, an area separation processor 306, a first color space converter 308, and a YCbCr corrector 310. , spatial filter processing unit 312, second color space conversion unit 314, color correction unit 316, black generation undercolor removal unit 318, output tone correction unit 320, and tone reproduction processing unit 322, and finally CMYK Image data represented by digital color signals corresponding to (C: cyan, M: magenta, Y: yellow, K: black) are output to the color image output device 40 .

The A/D conversion unit 302 converts analog signal image data corresponding to each of RGB into digital signal image data.

The shading correction unit 304 corrects various distortions occurring in the illumination system, the imaging system, and the imaging system of the color image input device 20 with respect to the image data of digital signals corresponding to RGB sent from the A/D conversion unit 302. process to remove the Also, the shading correction unit 304 adjusts the color balance.

Further, the shading correction unit 304 sends image data composed of RGB density signals (hereinafter, unless otherwise specified, the RGB signals represent density signals (signals representing pixel values)) to the area separation processing unit 306. Output.

The segmentation processing unit 306 determines whether each pixel in the input image data belongs to any of a background region, a photograph region (continuous tone region), a character region, and a halftone dot region based on the RGB density signals. process. Further, the area separation processing unit 306 generates an area identification signal indicating which area each pixel belongs to based on the result of the area separation processing, and the spatial filter processing unit 312, the color correction unit 316, and the black generation unit 316 generate area identification signals. The RGB signals input from the shading correction unit 304 are output as they are to the first color space conversion unit 308 in the subsequent stage, while being output to the color removal unit 318 and the gradation reproduction processing unit 322 .

A first color space conversion unit 308 (color space conversion (RGB to YCbCr) unit) converts RGB image data into YCbCr image data.

The YCbCr correction unit 310 performs image quality adjustment processing such as removal of background density and contrast on the YCbCr image data.

In other words, the background of the document (the paper on which characters are printed) has various colors. may be used excessively. For example, when forming an image in monochrome mode on a document with a yellowish background such as straw paper or a document with a colored background, if the background color is not treated as white, the white background (underground) will not be printed on the recording material when the image is output. is used. Therefore, in order to suppress the use of excess printing material, the YCbCr correction unit 310 performs a background density removal process (that is, a process of changing the density of the background to a white density) and a contrast adjustment process. I do.

Here, in the case of the first mode in which normal image processing is performed in an initial state in which the user does not give a particular instruction from the operation panel 50, background density removal processing is performed. Further, when the user instructs from the operation panel 50 the second mode in which image processing suitable for reproducing the color or density of the fluorescent colored portion is performed, correction different from that in the first mode is performed. Details will be described later.

The spatial filter processing unit 312 corrects the spatial frequency characteristics of the YCbCr signal image data input from the YCbCr correction unit 310, thereby preventing blurring and graininess deterioration of the output image. Spatial filtering is performed by a digital filter preset for each type of area according to the area identification signal input from 306 . Details of the spatial filtering unit 312 will be described later.

A second color space conversion unit 314 (color space conversion (YCbCr to RGB) unit) converts the YCbCr image data input from the spatial filtering unit 312 into RGB image data.

The color correction unit 316 converts the RGB signals input from the second color space conversion unit 314 into CMY signals according to the area identification signal input from the area separation processing unit 306 . In addition, the color correction unit 316 performs processing for removing color turbidity based on spectral characteristics of CMY color materials including unnecessary absorption components in order to achieve faithful color reproduction.

A black generation undercolor removal unit 318 performs black generation processing to generate a black (K) signal from the CMY signals after color correction by the color correction unit 316, and subtracts the K signal obtained by the black generation processing from the original CMY signals. and undercolor removal processing for generating new CMY signals. As a result, the CMY signals are converted into CMYK four-color signals (hereinafter referred to as CMYK signals).

For example, the black generation and undercolor removal unit 318 performs black generation using skeleton black as black generation processing. In the black generation process using this skeleton black, the input/output characteristic of the skeleton curve is y=f(x), the densities corresponding to the input C, M, and Y are respectively C, M, and Y, and the output C , M, Y, and K are C′, M′, Y′, and K′, respectively, and the UCR (Under Color Removal) rate is α (0<α<1),
K′=f{min(C,M,Y)}
C'=C-αK'
M′=M−αK′
Y'=Y-αY'
converts CMY three-color density signals into CMYK four-color density signals.

The output gradation correction unit 320 performs output gradation correction processing based on the output characteristics of the color image output device 40 on the image data of the CMYK signals input from the black generation undercolor removal unit 318 .

The gradation reproduction processing unit 322 predetermines the image data of the CMYK signals input from the output gradation correction unit 320 for each region type according to the region identification signal input from the region separation processing unit 306. the specified processing.

For example, regarding the region separated into character regions by the region separation processing unit 306, in order to improve the reproducibility of black characters or color characters in particular, the spatial filter processing unit 312 increases the amount of high-frequency enhancement by sharpness enhancement processing. A tone reproduction processing unit 322 performs binarization or multi-value processing on a high-resolution screen suitable for reproduction of high frequencies.

In addition, for the regions separated into halftone dot regions by the region separation processing unit 306, the spatial filter processing unit 312 performs low-pass filter processing for removing input halftone dot components, and the tone reproduction processing unit 322 performs the respective Gradation reproduction processing (halftone generation) is performed so that the gradation of pixels can be reproduced.

In addition, for the areas separated into photographic areas (continuous tone areas) by the area separation processing unit 306, the tone reproduction processing unit 322 performs binarization or multi-value processing on a screen that emphasizes tone reproduction. conduct.

The image data output from the gradation reproduction processing unit 322, that is, the image data subjected to each of the processes described above is temporarily stored in the storage unit 60, read out at a predetermined timing, and output to the color image output device 40. be.

The color image output device 40 outputs an image corresponding to image data onto a recording medium (for example, a sheet such as paper). A so-called color image output device 40 functions as an image forming section. The color image output device 40 forms an image on a recording medium using recording materials of two or more colors (four colors of C, M, Y, and K in this embodiment). In this embodiment, an electrophotographic printer is used as the color image output device 40 . However, the configuration of the color image output device 40 is not limited to this, and a printer device of another system such as an inkjet system may be used.

The operation panel 50 receives an instruction input from the user and transmits it to the control unit 10 . The operation panel 50 includes, for example, a display unit such as a liquid crystal display and operation keys for accepting user's operation input. Alternatively, the operation panel may be a touch panel.

The control unit 10 controls the entire image forming apparatus 1 . The control unit 10 implements various functions by reading and executing various programs stored in the storage unit 60, and is configured by, for example, a CPU (Central Processing Unit) which is an arithmetic device.

The control unit 10 receives various information stored in the storage unit 60, programs for executing various controls, instructions input from the user through the operation panel 50, and various sensors provided in the image forming apparatus 1. The operations of the color image input device 20, the color image processing device 30, the color image output device 40, and the operation panel 50 are controlled according to the detection result of the color image.

The storage unit 60 is a functional unit that stores various programs and various data necessary for the operation of the image forming apparatus 1 . The storage unit 60 is configured by, for example, a semiconductor memory, an HDD (Hard Disk Drive), or the like. Also, image data may be stored as appropriate.

(Details of YCbCr Corrector 310)
Details of the YCbCr correction unit 310 will now be described. When a mode or function setting (for example, highlighter pen mode, manual exposure setting: high, etc.) desired to reproduce colors suitable for a fluorescent colored original is selected, each component of YCbCr is as shown in FIGS. make such a correction.

FIG. 2 is a graph showing Y component correction. The horizontal axis indicates the Y (luminance) component of the input value, and the vertical axis indicates the Y (luminance) component of the output value. The dotted line is the normal document correction data, the dashed line is the highlight pen mode correction data, and the solid line is the manual exposure height correction data.

As is clear from FIG. 2, when the fluorescent pen mode is selected for a fluorescent colored document, the Y (luminance) component of YCbCr is made darker than that for a normal document. Make corrections. Specifically, although the degree varies depending on the type of color of the fluorescent pen, when processing and outputting with correction for a normal document, the portion colored with the fluorescent pen becomes lighter than the document. Therefore, when the highlight pen mode is selected, the Y (luminance) component of YCbCr in the portion colored with the highlight pen on the white portion of ordinary plain paper is approximately the minimum value (for example, 192) or more and approximately An input value less than the maximum value (for example, 241) is corrected to a value smaller than the correction value for normal documents.

FIG. 3 is an example of correction data for each component of CbCr. As is clear from FIG. 3, for the Cb and Cr components of the chromaticity components of YCbCr, low-saturation data is used to make the saturation that has decreased when reading the fluorescent colored portion closer to the appearance of the original. Correction is performed to increase the saturation of . Also, no particular correction is made for high saturation data. Specifically, as shown in FIG. 3, although the extent differs depending on the type of color of the highlighter pen, if output is performed without correcting the Cb and Cr components of the chromaticity components of YCbCr as in a normal document, , the color saturation of the portion colored with the highlighter pen becomes lower than that of the original. A very bright highlighter, like yellow, is not only desaturated, it fades. Therefore, when the highlight pen mode is selected, the values of the Cb and Cr components of the YCbCr chromaticity components of the white portion of the plain paper colored with the highlight pen are at least approximately the minimum value and at most approximately the maximum value. Corrects the input value of to increase the saturation.

Assuming that the first color space conversion unit 308 (RGB to YCbCr) sets achromatic colors to Cb=0 and Cr=0, corrections as shown in FIG. 3 are performed. Both the Cb and Cr components are corrected as shown in FIG. Specifically, in FIG. 3, -48 and 48 are preferably the inflection points (80 and 176 in the case of 0-255 data). This correction is performed using a one-dimensional lookup table.

As a result, the saturation of the fluorescent colored portion read low at the time of scanning can be made suitable, and the saturation of the portion where the saturation has not decreased at the time of scanning can be maintained. can. Although the saturation of the low-saturation portion other than the fluorescent-colored portion increases, it is possible to output an image that does not significantly impair the overall quality.

[2. Second Embodiment]
The second embodiment will be described as applied to a scanner device having a scanner function.

FIG. 4 is a block diagram for explaining the configuration of the scanner device 3. As shown in FIG. The image forming apparatus 1 shown in FIG. 1 may have a scan output function when the image forming apparatus 1 has a scan output function. In addition, about the structure common to 1st Embodiment, the same code|symbol is attached|subjected and description is abbreviate|omitted.

As shown in FIG. 4, a color image input device 20, a color image processing device 30, an operation panel 50, a control section 10 and a storage section 60 are provided.

The color image processing device 30 also includes an A/D (analog/digital) conversion unit 302, a shading correction unit 304, an area separation processing unit 306, a first color space conversion (RGB to YCbCr) unit 308, a YCbCr correction unit 310, A spatial filter processing unit 312 , a second color space conversion (YCbCr to RGB) unit 314 , a color correction unit 330 and an output tone correction unit 332 are provided.

Unlike the color correction unit 316 of the color image processing device in the image forming apparatus of FIG. are converted into RGB signals.

The output gradation correction unit 332 performs output gradation correction processing on image data of RGB signals input from the color correction unit 330, unlike the output gradation correction unit 320 of the color image processing device in the image forming apparatus of FIG. I do.

As described above, according to the above-described embodiment, the input image data read by scanning the document by the image input means is corrected to increase the saturation of the low-saturation image data. It is possible to provide an image processing apparatus that

For example, a portion colored with a yellow or orange highlighter will be very faint in normal copy/scan processing, and it will be difficult to distinguish between types of highlighter colors. By performing this processing, it becomes possible to distinguish between types of highlighter colors without making them too thin.

Further, according to the above-described embodiment, a mode indicating that it is suitable for reproducing the color and density of the fluorescent colored portion is provided. It is possible to provide an image processing apparatus characterized by performing correction for increasing the saturation of image data.

As a result, when copying/scanning a document colored with a fluorescent pen or the like, it is possible for the user to easily understand and output the fluorescent colored portion in a suitable color and density.

According to the above-described embodiment, an exposure setting is provided, and when an instruction to copy or scan is given with the exposure set high, correction is performed to increase the saturation of image data with low saturation. It is possible to provide an image processing apparatus that

As a result, when a document is copied/scanned with high exposure, it is possible to prevent the portions colored with a highlighter pen from being output with appropriate colors and densities.

According to the above-described embodiment, it is possible to provide an image processing apparatus characterized in that the correction for increasing the saturation of image data with low saturation is performed using the Cb and Cr components of YCbCr image data.

As a result, correction to increase the saturation of low-saturation image data can also be done by color correction, but usually a three-dimensional lookup table separate from the original is required, and the table design is complicated. and requires a large amount of memory. By using a one-dimensional lookup table for the Cb and Cr components, table design is easier than color correction, and the amount of memory required is small.

[3. Third Embodiment]
The third embodiment is an embodiment in which mode switching can be performed manually. For example, in the image forming apparatus 1 of the first embodiment and the scanner apparatus 3 of the second embodiment, exposure setting and exposure mode can be set using the operation panel 50 .

FIG. 5 is a diagram showing an example of a display screen on which parameters can be set on the operation panel 50. As shown in FIG. FIG. 5(a) is an example of a display screen that allows stepwise switching from "low exposure" to "high exposure" as a manual exposure setting. For example, it is possible to select from 5 levels on the operation panel 5, and the initial setting is the middle level. If you select and set the , the overall output will be darker.

FIG. 5B is an example of a display screen when manually setting the exposure mode. Exposure modes include character mode, character/print photo mode, photographic paper photo mode, and the like. In addition to these, a highlight pen mode is prepared and can be selected on the operation panel 50 . As a result, for example, not only can the copy operation mode be switched, but also the correction data shown in FIGS. 2 and 3 can be switched.

[4. Fourth Embodiment]
The fourth embodiment is an embodiment in which the image processing apparatus described above is realized by a computer.

The control block of the color image processing apparatus 30 shown in FIGS. 1 and 4 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or may be realized by using a CPU (Central Processing Unit). It may be realized by software.

In the latter case, the color image processing apparatus 30 includes a CPU for executing program instructions, which are software for realizing each function, and a ROM (Read Only Memory) in which the above programs and various data are recorded so as to be readable by a computer (or CPU). ) or a storage device (these are referred to as a “recording medium”), a RAM (Random Access Memory) for developing the above program, or the like. The object of the present invention is achieved by a computer (or CPU) reading and executing the program from the recording medium. As the recording medium, a "non-temporary tangible medium" such as a tape, disk, card, semiconductor memory, programmable logic circuit, or the like can be used. Also, the program may be supplied to the computer via any transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program. It should be noted that the present invention can also be implemented in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

This makes it possible to provide a portable recording medium recording the program code (executable program, intermediate code program, source program) for executing the processing of the YCbCr correction unit 310 . Further, the program recorded on the recording medium can be read by an image forming apparatus, an image reading apparatus, or a program reading apparatus provided in a computer system, thereby executing the document feature determination process.

The computer system includes an image input device such as a flatbed scanner, a film scanner, and a digital camera, a computer that performs various processing such as the above image processing method by loading a predetermined program code, and a CRT that displays the processing results of the computer. It may be configured by an image display device such as a display or a liquid crystal display and a printer for outputting the processing result of the computer on paper or the like. In addition, a network card, modem, or the like may be provided as communication means for connecting to a server or the like via a network.

[5. Modification]
Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and designs and the like within the scope of the scope of the claims can be applied without departing from the gist of the present invention. include.

1 image forming device 3 scanner device 10 control section 20 color image input device 30 color image processing device 302 A/D (analog/digital) conversion section 304 shading correction section 306 area separation processing section 308 first color space conversion section 310 YCbCr correction Section 312 Spatial Filter Processing Section 314 Second Color Space Conversion Section 316 Color Correction Section 318 Black Generation Under Color Removal Section 320 Output Gradation Correction Section 322 Gradation Reproduction Processing Section 330 Color Correction Section 332 Output Gradation Correction Section 40 Color Image Output Device 50 Operation panel 60 Storage unit

Claims (5)

In an image processing apparatus having an image input unit for inputting image data read by a contact optical system (CIS) method and a control unit,
The control unit
converting the image data input by the image input unit into YCbCr image data;
A first mode in which normal image processing is performed on the image data, and a second mode in which image processing suitable for reproducing the color or density of the fluorescent colored portion is provided,
When the second mode is set, for the image data,
The luminance component is corrected so that it is darker than a normal document,
For the Cb and Cr components, the color saturation is corrected from the achromatic color to the inflection point so that the saturation becomes high, and the portion from the inflection point to the high saturation is not corrected.
An image processing apparatus characterized by: The control unit
2. The image processing apparatus according to claim 1 , wherein the inflection points are -48 and +48 when the color space of the Cb component and the Cr component is represented by -127 to 127. an image input unit for inputting first image data read by a contact optical system (CIS) method; and a processing unit for executing image processing on the first image data and outputting second image data. and an image forming unit that forms an image based on the second image data,
The processing unit is
converting the image data input by the image input unit into YCbCr image data;
A first mode in which normal image processing is performed on the first image data, and a second mode in which image processing suitable for reproducing the color or density of the fluorescent colored portion is provided,
When the second mode is set, for the first image data,
The luminance component is corrected so that it is darker than a normal document,
For the Cb and Cr components, the color saturation is corrected from the achromatic color to the inflection point so that the saturation becomes high, and the portion from the inflection point to the high saturation is not corrected.
An image forming apparatus characterized by: An image processing method in an apparatus having an image input unit for inputting image data read by a contact optical system (CIS) method and a control unit,
A first mode in which normal image processing is performed on the image data, and a second mode in which image processing suitable for reproducing the color or density of the fluorescent colored portion is provided,
converting the image data input by the image input unit into YCbCr image data;
When the second mode is set, for the image data,
The luminance component is corrected so that it is darker than a normal document,
For the Cb and Cr components, the color saturation is corrected from the achromatic color to the inflection point so that the saturation becomes high, and the portion from the inflection point to the high saturation is not corrected.
An image processing method characterized by: In a computer having an image input unit for inputting image data read by a contact optical system (CIS) method and a control unit,
executing a first mode for performing normal image processing on the image data and a second mode for performing image processing suitable for reproducing the color or density of the fluorescent colored portion;
converting the image data input by the image input unit into YCbCr image data;
When the second mode is set, for the image data,
The luminance component is corrected so that it is darker than a normal document,
For the Cb component and Cr component, correction is performed so that the color saturation increases from the achromatic color to the inflection point, and the portion from the inflection point to high saturation is not corrected.
A program characterized by performing a function.

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