JP2013048365A - Image processing system and image processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct an image in accordance with the difference between output image sizes in different image processors.SOLUTION: When an image processing system 1 sends image data having been used to output an image in a first output size by one image processor Gs1 to Gsn, to another image processor Gs1 to Gsn to output an image in a second output size by another image processor Gs1 to Gsn mentioned above, the image processing system 1 generates a correction parameter for correcting colors in accordance with the difference between the output sizes, corrects the image data on the basis of the correction parameter, and thereafter outputs an image by another image processor Gs1 to Gsn mentioned above.

Description

  The present invention relates to an image processing system and an image processing apparatus, and more particularly to an image processing system and an image processing apparatus that perform image correction according to a difference in output image size in different image processing apparatuses.

  In an image processing apparatus that outputs an image such as a copying apparatus, a composite apparatus, an image scanner, a digital camera, or a projector, the output image has an output characteristic for each output image processing apparatus, for example, a display characteristic in display output. Therefore, even if an image is output based on the same image data, it appears as a different image to human eyes. This difference in display characteristics is caused by individual differences among image processing apparatuses, differences in display methods such as liquid crystal displays and projectors, and differences in colors used as the reference for image processing apparatuses. The difference in appearance is not only greatly influenced by the color shift, but also greatly influenced by human visual characteristics.

  That is, human vision has a characteristic called area effect and has the following characteristics.

  (A) A color having a high brightness appears to have a higher brightness when the area is large.

  (B) A color having a high saturation appears to have a higher saturation when it has a large area.

vice versa,
(C) A color with low lightness appears to be weaker when the area is large.

  (D) A color with low saturation looks weaker when the area is large.

  In other words, even if the same image is output by the same image processing device, if the display size is changed, the image appears different to the human eye.

  Conventionally, when the input image is scaled and output, the brightness value of the image data before or after scaling is compensated so as to compensate for the color area effect between the input image and the output image. There has been proposed an image processing apparatus that performs correction according to the magnification of magnification (see Patent Document 1).

  That is, in such a conventional technique, for example, in a copying apparatus, the user operates the operation display unit to designate an image magnification, and corrects the color of the output image based on the input magnification. A parameter to be determined is determined, and the input image data is corrected using the parameter to output an image.

  However, in the prior art described in the above publication, only the area effect of the color at the scaling factor of the image in one apparatus is compensated, so that image data is exchanged between apparatuses and output. Was not taken into account and needed to be improved.

  That is, today, image data is exchanged between image processing apparatuses via a network or a portable memory, and an image display output or the like is performed between different image processing apparatuses. As display devices such as display monitors and projectors are becoming smaller, larger screens, and higher definition, the difference in size is increasing when the same image is displayed and output between different devices. The color shift due to the effect is increasing.

  However, the prior art described in the above publication has a problem that color correction (color management) cannot be performed when image data is transferred between different devices and displayed.

  For example, an image viewed on a liquid crystal screen of a digital camera is different from an image projected by the projector by sending the image data to a projector via a network or a portable memory, and the size of the image is tens of times different. Therefore, the appearance of the image is greatly affected by the area effect.

  In such a case, the number of combinations of image processing apparatuses is enormous, so it is not only difficult to predict and perform color correction in advance and store such magnifications. As described above, it is not a realistic countermeasure that the user performs the setting operation to determine the parameter. In addition, since a projection device such as a projector changes not only the setting of the projection device but also the size of the projected image depending on the position of the projection device and the projection screen, it is difficult for the user to specify the magnification. There is a demand for a technique for performing correction appropriately.

  Accordingly, an object of the present invention is to improve the reproducibility of an output image by correcting a color shift with respect to human visual characteristics of images of different sizes output between different devices.

  The image processing system according to claim 1, wherein, in order to achieve the above object, in the image processing system for transferring at least image data between the first image processing device and the second image processing device, the first image processing device. Is a first image output means for outputting an image at a predetermined first output size based on image data, and a first output size acquisition for acquiring the first output size of the image output by the first image output means. And data for passing the image data used for image output by the first output means and the first output size acquired by the first output size acquisition means to the second image processing device using a predetermined medium Output means, wherein the second image processing device receives the image data and the first output size via the medium, and receives a predetermined second output based on the image data. Second image output means for outputting an image in size, second output size acquisition means for acquiring the second output size of the image output by the second image output means, the first output size and the second Parameter generating means for generating correction parameters for color correction of the image from the output size, and color correction is performed on the image data received by the data receiving means using the correction parameters and output to the second image output means And an image correction means.

  According to the present invention, it is possible to correct a color shift with respect to human visual characteristics of images of different sizes output between different devices, and improve the reproducibility of an output image.

1 is a system configuration diagram of an image forming system to which an embodiment of the present invention is applied. The functional block diagram of the image processing apparatus as an image generation apparatus. 1 is a block configuration diagram of an image processing apparatus as an image output apparatus. The functional block diagram of the image processing apparatus as an image output device. Explanatory drawing of a correction pattern production | generation process. 5 is a flowchart showing image processing in the image generation apparatus. 5 is a flowchart showing image processing in the image output apparatus.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, since the Example described below is a suitable Example of this invention, various technically preferable restrictions are attached | subjected, However, The range of this invention is unduly limited by the following description. However, not all the configurations described in the present embodiment are essential constituent elements of the present invention.

  1 to 7 are diagrams showing an embodiment of an image processing system and an image processing apparatus of the present invention, and FIG. 1 is an image processing to which an embodiment of the image processing system and the image processing apparatus of the present invention is applied. 1 is a system configuration diagram of a system 1. FIG.

  In FIG. 1, an image processing system 1 includes a plurality of image processing apparatuses Gs1 to Gsn connected to a wired or wireless network NW. The network NW is a LAN (Local Area Network) such as Ethernet (registered trademark). Etc. are used.

  The image processing apparatuses Gs1 to Gsn are an apparatus for inputting an image such as a scanner apparatus, a copying apparatus, a printer apparatus, a composite apparatus, a projector, and a digital camera, an apparatus for outputting an image, and an apparatus for inputting and outputting an image.

  In the image forming system 1, the image processing apparatuses Gs1 to Gsn having an image generation function generate image data that is output at a predetermined output size (first output size) by the image output function unit of the image processing apparatus Gs1 to Gsn. The image data is transmitted to the other image processing devices Gs1 to Gsn via the portable memory, and the other image processing devices Gs1 to Gsn output the images in a predetermined output size (second output size).

  In the following description, the case where the image output is a display output will be described. However, the same can be applied to the case where the image output is a recording output on a sheet or the like.

  Further, in the following description, among the image processing devices Gs1 to Gsn, the image processing devices Gs1 to Gsn that generate images and display and output them on their own devices, and then send them to the other image processing devices Gs1 to Gsn. The other image processing devices Gs1 to Gsn that display and output images based on the transmitted image data will be described as the image output device (second image processing device) Gb. .

  In the image forming system 1, an image generation device Ga that is image processing devices Gs <b> 1 to Gsn that generate images includes functional blocks as shown in FIG. 2.

  That is, the image generation device Ga includes ROM, EEPROM (Electrically Erasable and Programmable Read Only Memory), EPROM, flash memory, flexible disk, CD-ROM (Compact Disc Read Only Memory), CD-RW (Compact Disc Rewritable), DVD. An image processing program for the image generation apparatus of the present invention recorded on a computer-readable recording medium such as a (Digital Versatile Disk), an SD (Secure Digital) card, or an MO (Magneto-Optical Disc) is introduced. Thus, as shown in FIG. 2, a user operation function unit 11, an image input function unit 12, a size detection function unit 13, a network control function unit 14, an image output function unit 15, and the like are constructed. This image processing program is a computer-executable program written in a legacy programming language such as assembler, C, C ++, C #, Java (registered trademark) or an object-oriented programming language, and is stored in the recording medium. Can be distributed.

  The user operation function unit 11 is constructed by operation display units of the image processing apparatuses Gs1 to Gsn, and has operation keys, an operation screen, and the like, and performs a type selection operation of an image input method and an image correction processing function of the present invention. An on / off operation, a network connection setting operation, an operation for specifying the image processing apparatuses Gs1 to Gsn that output images, and the like are performed.

  The image input function unit 12 reads or shoots a scanner, a digital camera, or the like in accordance with the operation of the user operation function unit 11 and captures it as digital image data in the image generation device Ga, thereby detecting a size. To the unit 13, the network control unit 14, and the image output function unit 15.

  The image output function unit (first image output unit) 15 is constructed by a projection unit or the like using a liquid crystal monitor, an irradiation lens, and the like. Based on the image data captured by the image input function unit 12, an image is output to a predetermined output size. Direct display or projection display is performed at (first output size).

  A size detection function unit (first output size acquisition unit) 13 detects an output size (first output size) when the image output function unit 15 displays an image captured by the image input function unit 12. The size detection function unit 13 detects the first output size based on the setting operation of the user operation function unit 11, the function of the image output function unit 15, and the like. For example, when the image output function unit 15 is a liquid crystal monitor, the size detection function unit 13 detects the size of an image displayed on the liquid crystal monitor, and when the image output function unit 15 is a projection unit. Detects the size obtained from the distance to the position of the projection destination (projection position) and the projection magnification of the irradiation lens or the size of the image at the direct projection position.

  The network control function unit (data output means) 14 is connected to the network NW, and the user operation function unit 11 specifies the image data captured by the image input function unit 12 and the first output size detected by the size detection function unit 13. The image data is transmitted to the image output device Gb, which is the output image processing devices Gs1 to Gsn, via the network NW. In this embodiment, the network NW is used to send the image data and the first output size from the image generation device Ga to the image output device Gb. However, the present invention is not limited to using the network NW. For example, the image data and the first output size may be stored in a portable memory such as an SD card, and the image data and the first output size may be read from the portable memory by the image generation device Ga and sent.

  In the above description, the image generation device Ga sends the image data and the first output size to the image output device Gb designated by the user operation function unit 11, but the image processing devices Gs1 to Gsn serving as image output destinations. An image request may be sent from an image output device Gb to the image generation device Ga, and the image generation device Ga may pass the image data and the first output size to the image output device Gb in response to the image request.

  In the image forming system 1, an image output device Gb that is an image processing device Gs1 to Gsn that outputs an image is configured as a block as shown in FIG. 3, and includes a CPU (Central Processing Unit) 21, a storage unit 22, and an operation input. A unit 23, an external interface unit 24, an image input unit 25, an image output unit 26, and the like. The CPU 21, storage unit 22, operation input unit 23, external interface unit 24, image input unit 25, and image output unit 26 are connected by a bus 27.

  The storage unit 22 includes a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and stores programs and system data, particularly the image processing program of the present invention, and is used as a work memory for the CPU 21. .

  A CPU (parameter generation means, image correction means, second output size acquisition means) 21 controls each unit of the image output device Gb while using the storage unit 22 as a work memory based on a program in the storage unit 22. The function as the image output device Gb is executed, and the function as the image processing device of the present invention is executed.

  The operation input unit (correction target selection means, selection means) 23 has operation keys, an operation screen, and the like, and selects an input method type of an image, an on / off operation of the image correction processing function of the present invention, and a network connection Setting operation, setting operation of an output method for outputting an image, and the like are performed.

  The external interface unit (data receiving means) 24 is connected to the network NW, and exchanges data and commands with the other image processing devices Gs1 to Gsn via the network NW, particularly with the image generating device Ga. The image data and the first output size are exchanged. The external interface unit 24 is not limited to an interface connected to the network NW and functions as a network interface. For example, the external interface unit 24 is an interface of a portable memory such as an SD card, and reads and writes data in the portable memory. May be performed.

  The image input unit 25 acquires the image data generated by the image generation device Ga and acquired by the external interface unit 24 and the first output size.

  The CPU 21 performs image size conversion and color correction on the image data acquired by the image input unit 25 and passes the image data to the image output unit 26 as will be described later. In this case, the CPU 21 detects the output size (second output size) in the display output of the image in the image output unit 26 based on the operation in the operation input unit 23, and the first output size and the second output size. Based on the color correction. In the color correction based on the first output size and the second output size, the CPU 21 particularly generates a correction parameter corresponding to the difference between the first output size and the second output size, and inputs the image based on the correction parameter. Color correction is performed on the image data acquired by the unit 25. Further, in this color correction, the CPU 21 generates the correction parameter according to the size and the area size of at least one of the brightness and the saturation of the image data. Further, in response to an instruction input from the operation input unit 23, the CPU 21 performs color correction on the image data acquired by the image input unit 25 for both or both of lightness and saturation. In this lightness and saturation correction, for example, the CPU 21 generates correction parameters for lightness and saturation, and image data acquired by the image input function unit 25, for example, RGB (Red, Green, Green). (Green), blue (Blue) image data is converted to lightness, saturation, and hue, and the brightness and saturation of the image data are corrected based on the correction parameters described above. Correction to increase the degree, correction to decrease the brightness, correction to decrease the saturation, etc. are performed.

  The image output unit (second image output unit) 26 is a projection unit or the like using a liquid crystal monitor, an irradiation lens, or the like, and displays and outputs an image based on image data passed from the CPU 21.

  The image output device Gb is recorded on a computer-readable recording medium such as ROM, EEPROM, EPROM, flash memory, flexible disk, CD-ROM, CD-RW, DVD, SD card, MO, etc. Image processing for executing image processing method for appropriately performing color correction according to enlargement / reduction size of image, which will be described later, by reading an image processing program for executing the image processing method in the image output apparatus and introducing it into the storage unit It is built as a device. This image processing program is a computer-executable program written in a legacy programming language such as assembler, C, C ++, C #, Java (registered trademark) or an object-oriented programming language, and is stored in the recording medium. Can be distributed.

  In the image output device Gb, a functional block is constructed as shown in FIG. 4 by introducing the image processing program. That is, as shown in FIG. 4, the image output device Gb includes a user operation function unit 31, a network control function unit 32, an image input function unit 33, a size input function unit 34, a size detection function unit 35, and a correction parameter generation function unit. 36, an image correction function unit 37, an image output function unit 38, and the like are constructed.

  The user operation function unit (correction target selection unit, selection unit) 31 is constructed by the operation input unit 23, and has operation keys, an operation screen, etc. The on / off operation of the image correction processing function of the invention, the network connection setting operation, the output method setting operation for outputting an image, and the like are performed.

  The network control function unit (data receiving means) 32 is constructed by the external interface unit 24, and as described above, exchanges data and commands with the other image processing devices Gs1 to Gsn via the network NW, in particular. The image data and the first output size are exchanged with the image generation device Ga.

  The image input function unit 33 is constructed by the image input unit 25 and acquires the image data acquired by the network control function unit 32 and passes it to the image correction function unit 37 as described above.

  The size input function unit 34 is configured by the CPU 21, acquires the first output size sent from the image generation device Ga acquired by the network control function unit 32, and passes it to the correction parameter generation function unit 36. The size detection function unit 13, the network control function unit 14, the network control function unit 32, and the image input function unit 33 of the image generation device Ga function as image data acquisition means as a whole.

  The size detection function unit (second output size acquisition means) 35 is configured by the CPU 21 and outputs an image output size (hereinafter, second output) that is actually output by the image output function unit 38 in response to an operation of the user operation function unit 31. Is detected and output to the correction parameter generation function unit 36. The size detection function unit 35 detects the second output size, for example, when the image output function unit 38 is a liquid crystal monitor, detects the size of the image displayed on the liquid crystal monitor, and the image output function unit 38 In the case of the projection unit, the size obtained from the distance to the projection destination position (projection position) and the projection magnification of the irradiation lens or the size of the image at the direct projection position is detected.

  The correction parameter generation function unit (parameter generation means) 36 is configured by the CPU 21, and based on the first output size from the size input function unit 34 and the second output size from the size detection function unit 35, the image correction function unit 37. Thus, a correction parameter for performing color correction on the image data is generated. For example, as shown in FIG. 5A, the correction parameter generation function unit 36 subtracts the first output size and the second output size from the image histogram of the lightness and saturation output of the original image. When the image generated by the image generation device Ga, which is the original image, is reduced and output by the image output function unit 38, as shown in FIG. 5B, based on the size and area of brightness and saturation. When the correction parameter to be corrected is generated, and the image generated by the image generation device Ga that is the original image is enlarged and output by the image output function unit 38, as shown in FIG. A correction parameter to be corrected is generated based on the magnitude and area of the saturation.

  That is, the correction parameter generation function unit 36 generates correction parameters as follows.

(1) In the case of image reduction,
(1-1) For the brightness correction parameter,
(A) A color having a high brightness appears to have a lower brightness when it has a smaller area. Therefore, a correction parameter that increases as the brightness increases is generated.

  (B) A color having a small lightness appears to have a larger lightness when the area is small. Therefore, a correction parameter is generated so that the smaller the lightness, the smaller the correction.

(1-2) For saturation correction parameters,
(A) Since a color having a high saturation appears to have a lower saturation when the area is smaller, a correction parameter that is increased by correction as the saturation is increased is generated.

  (B) Since a color with small saturation appears to have a larger saturation when the area is smaller, a correction parameter is generated that is reduced by correction as the saturation is smaller.

(2) In the case of image enlargement,
(2-1) For the brightness correction parameter,
(A) A color having a high lightness appears to have a larger lightness when it has a large area. Therefore, the larger the lightness, the smaller the color is corrected.

  (B) A color having a low brightness appears to have a smaller brightness when the area is large. Therefore, the smaller the brightness, the larger the correction.

(2-2) For the saturation correction parameter,
(A) A color with a high saturation appears to have a larger saturation when the area is large, and therefore, the larger the saturation, the smaller the correction.

  (B) Since a color with low saturation appears to be smaller when the area is large, the color is increased by correction as the saturation is small.

  The correction parameter generation function unit 36 outputs the correction parameters generated as described above to the image correction function unit 37.

  The image correction function unit (image correction unit) 37 is configured by the CPU 21 and performs color correction on the image data input from the image input function unit 33 according to the correction parameter input from the correction parameter generation function unit 36. To the image output function unit 38. In this lightness and saturation correction, for example, the correction parameter generation function unit 36 generates correction parameters for lightness and saturation as described above and outputs them to the image correction function unit 37 for image correction. The function unit 37 converts the image data input from the image input function unit 33, for example, RGB image data into brightness, saturation, and hue, and corrects the correction parameters for the brightness and saturation of the image data. Based on the correction parameters from the generation function unit 36, correction for increasing brightness, correction for increasing saturation, correction for decreasing brightness, correction for decreasing saturation, and the like are performed.

  The image output function unit (second image output unit) 38 is configured by the image output unit 26 and is based on the image data passed from the image correction function unit 37 to the projection unit using a liquid crystal monitor, an irradiation lens, or the like. Is output.

  Next, the operation of this embodiment will be described. The image processing system 1 according to the present embodiment easily and appropriately corrects a color shift with respect to human visual characteristics of images of different sizes output between different devices, and easily improves reproducibility of an output image. Let

  That is, the image forming system 1 generates image data using one of the image processing devices Gs1 to Gsn as the image generating device Ga, displays the image at the first output size, and the image data of the first output size. Is output with the second output size as one of the other image processing devices Gs1 to Gsn as the image output device Gb. At this time, the difference between the output sizes of the image data to be displayed with the second output size After color correction is performed based on the corresponding correction parameter, display output is performed.

  First, image processing in the image generation device Ga will be described with reference to FIG. The image generation device Ga is a user operation function unit 11 that performs an image input method type selection operation, an on / off operation of an image correction processing function of the present invention, a network connection setting operation, and image processing devices Gs1 to Gs1 that output images. When a Gsn designation operation or the like is performed (step S101), the size detection function unit 13 detects the first output size that is the display output size of the image in the image output function unit 15 (step S102).

  In the image generation device Ga, the image input function unit 12 generates an image acquired by a scanner, a digital camera, or the like as digital image data in accordance with the operation of the user operation function unit 11 (step S103), and the image output function unit 15 displays and outputs an image of the first output size based on the image data generated by the image input function unit 12 (step S104).

  Then, the image generation device Ga transmits the image data generated by the image input function unit 12 by the network control function unit 14 and the first output size output by the image output function unit 15 to the image output device Gb via the network NW. .

  As shown in FIG. 7, the image output device Gb is configured such that, first, a user operation function unit 31 selects an image input method type, an on / off operation of the image correction processing function of the present invention, a network connection setting operation, When an output method setting operation for outputting an image or the like is performed (step S201), the size detection function unit 35 detects a second output size that is an image output size in the image output function unit 38, and generates a correction parameter. It passes to the part 36 (step S202).

  In the image output device Gb, the network control function unit 32 acquires the image data transmitted from the image generation device Ga via the network NW and passes it to the image correction function unit 37 (step S203). The size input function unit 34 acquires the first output size 32 received from the image generation device Ga via the network NW and passes it to the correction parameter generation function unit 36 (step S204).

  In the image output device Gb, the correction parameter generation function unit 36 determines whether the first output size from the size input function unit 34 and the second output size from the size detection function unit 35 are the same size, that is, matches. However, if they do not match (NO in step S205), a correction parameter is generated as described above from the difference between the first output size and the second output size and output to the image correction function unit 37. (Step S206). The correction parameter generation function unit 36 determines that the image is enlarged when the first output size <the second output size, and determines that the image is reduced when the first output size> the second output size. The correction parameter generation function unit 36 determines that there is no change in the image output size when the first output size = the second output size.

  In this case, the correction parameter generation function unit 36 generates a correction parameter in accordance with the size and area size of at least one of brightness and saturation of the image data.

  If the user operation function unit 31 is set by the user to correct both brightness and saturation, or only one of brightness and saturation, the image correction function unit 37 performs correction according to the setting, or The correction parameter generation function unit 36 generates a correction parameter according to the setting and outputs the correction parameter to the image correction function unit 37.

  Further, the correction parameter generation function unit 36 generates a correction parameter and outputs it to the image correction function unit 37 only when image correction is selected by the user in the user operation function unit 31, and image correction is selected. When there is no correction parameter, no correction parameter is generated.

  In the image output device Gb, the image correction function unit 37 performs color correction on the image data input from the image input function unit 33 using the correction parameters input from the correction parameter generation function unit 36. The image output function unit 38 outputs the image in the second output size based on the image data corrected by the image correction function unit 37 (step S208).

  Then, in step S205, when the first output size matches the second output size (YES in step S205), the image output device Gb causes the correction parameter generation function unit 36 to display the image generation device. It is determined that there is no change in the display output size in Ga and the display output size in the image output device Gb, and the image output function unit 38 displays and outputs an image without performing image correction in the image correction function unit 37 ( Step S208).

  As described above, the image processing system 1 according to the present exemplary embodiment includes the image processing devices Gs1 to Gsn, in particular, between the image processing device (first image processing device) Ga and the image processing device (second image processing device) Gb. At least in the image processing system 1 that transmits and receives image data, the image processing device Ga includes an image output function unit (first image output unit) 15 that outputs an image with a predetermined first output size based on the image data, and an image output. A size detection function unit (first output size acquisition means) 13 for acquiring the first output size of the image output by the function unit 15, and the image data and size detection used for image output by the image output function unit 15 A network control function unit (data output means) 14 for passing the first output size acquired by the function unit 13 to the image processing apparatus Gb using a predetermined medium such as a network NW; The image processing apparatus Gb includes a data receiving unit of the external interface unit 24 or the network control function unit 32 that receives the image data and the first output size via the medium, and a predetermined second output based on the image data. Second image output means of the image output section 26 and image output function section 38 for outputting an image in size, and the CPU 21 and size detection function section for acquiring the second output size of the image output by the second image output means 35, a second output size acquisition unit, a CPU 21 for generating correction parameters for color correction of an image from the first output size and the second output size, a parameter generation unit of the correction parameter generation function unit 36, and the data reception The image data received by the means is subjected to color correction using the correction parameter and output to the second image output means. It includes PU21 and image correction means of the image correction function unit 38, a.

  Therefore, it is possible to correct a color shift with respect to human visual characteristics of images of different sizes output between different image processing apparatuses Gs1 to Gsn, and to improve the reproducibility of the output image.

  Further, the image processing devices Gs1 to Gsn as the image output device Gb of the present embodiment output an image with a predetermined first output size in the image output function unit 15 of the image generation device Ga which is another image processing device Gs1 to Gsn. Data receiving means of the external interface unit 24 or the network control function unit 32 for receiving the image data and the first output size of the image output by the image output function unit 15, and a predetermined second output based on the image data Second image output means of the image output section 26 and image output function section 38 for outputting an image in size, and the CPU 21 and size detection function section for acquiring the second output size of the image output by the second image output means 35, a second output size acquisition means, and a CPU 2 for generating correction parameters for color correction of an image from the first output size and the second output size. And a parameter generation unit of the correction parameter generation function unit 36, and a CPU 21 and an image correction function unit that perform color correction on the image data received by the data reception unit using the correction parameter and output to the second image output unit 38 image correction means.

  Therefore, it is possible to correct a color shift with respect to human visual characteristics when an image output from another image processing device Gs1 to Gsn is output from the own image processing device Gs1 to Gsn. Can be improved.

  Further, in the image forming system 1 according to the present embodiment, the size detection function unit 13 and the size detection function unit 35 have the output size of the image at the actual output position of the image by the image output function unit 15 and the image output function unit 38. Is getting.

  Therefore, it is possible to accurately detect the size of the image that is actually output, and to efficiently and more appropriately correct the color shift with respect to the human visual characteristics of images of different sizes output between different devices. Thus, the reproducibility of the output image can be further improved.

  In the image forming system 1 of the present embodiment, the correction parameter generation function unit 36 generates a correction parameter corresponding to the difference between the first output size and the second output size.

  Accordingly, it is possible to efficiently and more appropriately correct a color shift with respect to human visual characteristics of images of different sizes output between different devices, and to easily further improve the reproducibility of the output image. .

  Furthermore, in the image forming system 1 of the present embodiment, the correction parameter generation function unit 36 has the size and the area size of at least one of the brightness and saturation of the image data acquired by the image input function unit 33. The correction parameter is generated according to the above.

  Accordingly, it is possible to efficiently and more appropriately correct a color shift with respect to human visual characteristics of images of different sizes output between different devices, and to easily further improve the reproducibility of the output image. .

  Further, the image forming system 1 of the present embodiment performs color correction on image data by the image correction function unit 37 for both or either one of brightness and saturation.

  Therefore, image correction can be selected according to the intention or usability of the user's output image, and the color of the human visual characteristics of images of different sizes output between different devices can be improved while improving usability. The deviation can be corrected efficiently and more appropriately.

  Further, the image forming system 1 of the present embodiment includes a user operation function unit (selection unit) 31 that selects whether or not to perform color correction, and the image correction function unit (image correction unit) 38 has a user operation function. The color correction is executed only when the color correction is selected by the unit 31.

  Therefore, whether or not to perform image correction can be selected according to the user's usability, etc., and the color shift with respect to human visual characteristics of images of different sizes output between different devices while improving usability Can be corrected efficiently and more appropriately.

  The invention made by the present inventor has been specifically described based on the preferred embodiments. However, the present invention is not limited to that described in the above embodiments, and various modifications can be made without departing from the scope of the invention. It goes without saying that it is possible.

DESCRIPTION OF SYMBOLS 1 Image processing system Gs1-Gsn Image processing apparatus NW Network Ga Image generation apparatus Gb Image output apparatus 11 User operation function part 12 Image input function part 13 Size detection function part 14 Network control function part 15 Image output function part 21 CPU
DESCRIPTION OF SYMBOLS 22 Memory | storage part 23 Operation input part 24 External interface part 25 Image input part 26 Image output part 27 Bus 31 User operation function part 32 Network control function part 33 Image input function part 34 Size input function part 35 Size detection function part 36 Correction parameter generation Function unit 37 Image correction function unit 38 Image output function unit

JP 2001-339602 A

Claims (7)

In an image processing system that exchanges at least image data between a first image processing apparatus and a second image processing apparatus,
The first image processing apparatus includes:
First image output means for outputting an image at a predetermined first output size based on the image data;
First output size acquisition means for acquiring the first output size of the image output by the first image output means;
Data output means for passing the image data used for image output by the first output means and the first output size acquired by the first output size acquisition means to the second image processing device using a predetermined medium; ,
With
The second image processing device includes:
Data receiving means for receiving the image data and the first output size via the medium;
Second image output means for outputting an image at a predetermined second output size based on the image data;
Second output size acquisition means for acquiring the second output size of the image output by the second image output means;
Parameter generation means for generating correction parameters for color correction of an image from the first output size and the second output size;
Image correction means for performing color correction on the image data received by the data receiving means using the correction parameter and outputting the color correction to the second image output means;
An image processing system comprising: The first output size acquisition means and the second output size acquisition means are:
The image processing system according to claim 1, wherein an output size of the image at an actual output position of the image by the first image output unit and the second image output unit is acquired. The parameter generation means includes
The image processing system according to claim 1, wherein a correction parameter corresponding to a difference between the first output size and the second output size is generated. The parameter generation means includes
The correction parameter is generated according to a size and an area size of at least one of brightness and saturation of the image data acquired by the image data acquisition unit. Item 4. The image processing system according to any one of Items 3 to 4. The image forming system includes:
A correction target selection unit that selects whether to perform the color correction on the image data by the image correction unit with respect to either or both of brightness and saturation;
The image correcting means includes
5. The image processing system according to claim 1, wherein the color correction is performed only on a correction target selected by the correction target selection unit. The image forming system includes:
Selecting means for selecting whether or not to perform the color correction;
The image correcting means includes
6. The image processing system according to claim 1, wherein the color correction is executed only when execution of the color correction is selected by the selection unit. Data receiving means for receiving image data output at a predetermined first output size in the first image output means of another image processing apparatus and the first output size of the image output by the first image output means;
Second image output means for outputting an image at a predetermined second output size based on the image data;
Second output size acquisition means for acquiring the second output size of the image output by the second image output means;
Parameter generation means for generating correction parameters for color correction of an image from the first output size and the second output size;
Image correction means for performing color correction on the image data acquired by the information acquisition means using the correction parameter and outputting the color correction to the second image output means;
An image processing apparatus comprising:

Images