JP2006311352A - Color reproduction system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display a picture which reproduces correctly the color of an object to be photographed. <P>SOLUTION: A color reproduction system 200 is provided with an imaging device 1 equipped with an image pick-up color gap table 5a for storing image pick-up color gap information for showing a color change generated when an image pick-up 2 photographs an object to be photographed; and a projection device 11B comprising a color adjustment part 12b for changing the picture color information of RAW data from an imaging device 1, and a projection color gap table 14b for storing indication color gap information which shows a color change generated when a projection optical system 15 and a lamp La display a projection picture. When the imaging device 1 is connected, the color adjustment 12b acquires RAW data and image pick-up color gap information. The picture color information is changed into the color information of the object to be photographed which shows the color of the object to be photographed. The color information of the object to be photographed is changed into indication picture information which shows the color information of the projection picture data based on the acquired image pick-up color gap information. The color information of the object to be photographed is changed into indication picture color information which shows the color information of projection picture data based on the indication color gap information. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a color reproduction system that displays an image that reproduces the color of a subject on a display device connected to the imaging device based on image data generated by the imaging device imaging the subject.

  In recent years, with the widespread use of imaging devices such as digital cameras and display devices such as projectors, image display systems have been developed that connect these devices and display images captured by the imaging devices with high display quality on the display device. (For example, refer to Patent Documents 1 and 2).

  In the imaging information processing system disclosed in Patent Document 1, a computer and a television monitor, a projector, and the like as an image output target are connected to a digital camera, and the computer edits imaging information generated by the digital camera. At this time, designation information for specifying the image output target is added to the imaging information, and the digital camera acquires the edited imaging information, determines the image output target based on the specified information, and determines the image output. An image is output by adjusting at least one of luminance and display size indicated by the imaging information in accordance with the target. As a result, high display quality such as improving the balance of light and darkness of the displayed image is obtained without depending on the model of the image output target.

JP-A-10-174036 JP 2002-314863 A

  However, in the imaging information processing system described above, since the input device (digital camera) and the display device (projector) transmit only image data, color shift (saturation, hue, brightness, etc.) is performed at the image processing stage of each device. There was a problem that occurred. Color misregistration of each device may occur due to a calculation error during image processing or the like, but may be consciously performed by a maker's picture creation (for example, replacement with a human memory color). In any case, there is a problem that an image deviating from the original color is displayed by combining devices having color misregistration that are not uniform as image input-display devices.

  In addition, when a projector is connected, the digital camera disclosed in Patent Document 2 obtains information on the number of colors and resolution that can be displayed by the projector, and outputs image data suitable for the projector to obtain high display quality. However, the process for reproducing the color of the subject is not performed.

  The present invention has been made in view of the above, and in the case where color misregistration occurs at least when an object is imaged and when an image obtained by imaging the object is displayed, or an image generated by imaging the object An object of the present invention is to provide a color reproduction system capable of displaying an image in which the color of a subject is accurately reproduced when data is image-processed in an imaging apparatus.

  In order to achieve the above object, a color reproduction system according to a first aspect of the present invention includes an imaging unit that captures an image of a subject and generates image data, and an imaging that indicates a color change that occurs when the imaging unit captures the subject. An image of the image data, which is color information indicated by gradation values of a plurality of basic colors, and an imaging device having imaging color misregistration storage means for storing color misregistration information (optical characteristic information from the lens to the image sensor) A display device comprising: a color adjusting unit that converts color information; and a display unit that displays a color reproduction image that reproduces the color of the subject based on the image data in which the image color information is converted by the color adjusting unit. And the color adjustment unit acquires the image data and the imaging color misregistration information when the imaging device is connected, and obtains the image color information based on the acquired imaging color misregistration information. in front And converting the object color information is the color information indicating the color of the object.

  In the color reproduction system according to claim 2, in the above invention, the imaging color misregistration information is stored as an imaging color misregistration storage table storing the subject color information corresponding to the image color information for each color, The color adjustment unit acquires the image data and the imaging color misregistration storage table when the imaging device is connected, and refers to the acquired imaging color misregistration storage table to obtain the image color information as the subject color. It is characterized by converting to information.

  According to a third aspect of the present invention, there is provided the color reproduction system according to the above invention, wherein the display device stores display color misregistration information indicating a color change generated when the display means displays a color reproduction image. A storage unit, wherein the color adjustment unit acquires the image data and the imaging color misregistration information when the imaging device is connected, and based on the acquired imaging color misregistration information, the image color information Is converted into the subject color information, and the converted subject color information is converted into display image color information that is the color information that cancels out the color change generated by the display means based on the display color shift characteristic. It is characterized by that.

  In the color reproduction system according to claim 4, in the above invention, the imaging color misregistration information is stored as an imaging color misregistration storage table storing the subject color information corresponding to the image color information for each color, The display color misregistration information is stored as a display color misregistration storage table in which the display image color information corresponding to the subject color information is stored for each color, and the color adjustment unit, when the imaging device is connected, Obtain image data and the imaging color misregistration storage table, refer to the acquired imaging color misregistration storage table, convert the image color information into the subject color information, refer to the display color misregistration storage table, The converted subject color information is converted into the display image color information.

  According to a fifth aspect of the present invention, there is provided a color reproduction system that captures a subject and generates image data, and imaging color misregistration information (imaging from a lens) that indicates a color change that is generated when the imaging unit captures the subject. Imaging color misregistration storage means for storing (optical characteristic information up to the element), image processing for generating image data by performing image processing on the image data, and generating image processing information indicating processing steps of the image processing A color adjustment unit that converts the processed image data into the image data and converts image color information of the image data that is color information indicated by gradation values of a plurality of basic colors And display means for displaying a color reproduction image for reproducing the color of the subject based on the image data obtained by converting the image color information by the color adjustment means. And the color adjustment unit acquires the processed image data, the image processing information, and the imaging color misregistration information when the imaging device is connected, and based on the acquired image processing information, The processed image data is converted into the image data, and the image color information of the converted image data is converted into subject color information that is the color information indicating the color of the subject based on the acquired captured color shift information. It is characterized by converting.

  In the color reproduction system according to claim 6, in the above invention, the imaging color misregistration information is stored as an imaging color misregistration storage table storing the subject color information corresponding to the image color information for each color, The color adjustment unit acquires the processed image data, the image processing information, and the imaging color misregistration storage table when the imaging device is connected, and based on the acquired image processing information, the processed image data Is converted into the image data, and the image color information of the converted image data is converted into the subject color information with reference to the acquired imaging color misregistration storage table.

  According to a seventh aspect of the present invention, in the color reproduction system according to the present invention, the display device stores display color misregistration information indicating a color change generated when the display means displays the color reproduction image. When the image capturing apparatus is connected, the color adjusting unit acquires the processed image data, the image processing information, and the captured color misregistration information, and based on the acquired image processing information. And converting the processed image data into the image data, converting image color information of the converted image data into the subject color information based on the acquired imaging color misregistration information, and displaying the display color misregistration information. The converted subject color information is converted into display image color information which is the color information that cancels out the color change generated by the display means.

  Further, in the color reproduction system according to claim 8, in the above invention, the imaging color misregistration information is stored as an imaging color misregistration storage table storing the subject color information corresponding to the image color information for each color, The display color misregistration information is stored as a display color misregistration storage table in which the display image color information corresponding to the subject color information is stored for each color, and the color adjustment unit, when the imaging device is connected, Processed image data, the image processing information, and the imaging color misregistration storage table are acquired, the processed image data is converted into the image data based on the acquired image processing information, and the acquired imaging color misregistration storage is acquired. The image color information of the converted image data is converted into the subject color information with reference to the table, and the converted object is read with reference to the display color misregistration storage table. And converting the color information in the display image color information.

  According to a ninth aspect of the present invention, there is provided a color reproduction system that includes an imaging device that captures an image of a subject and generates image data, and an identification information storage unit that stores identification information for identifying the device itself. Based on the color adjustment means for converting the image color information of the image data, which is color information indicated by the gradation value of the basic color, and the image data whose image color information has been converted by the color adjustment means, A display unit that displays a color reproduction image that reproduces a color, a color change that occurs when the imaging unit images a subject, and a color change that the display unit generates when the color reproduction image is displayed are synthesized. A display device having a color misregistration characteristic storage table that stores combined color misregistration information indicating a color change corresponding to each imaging device, and the color adjustment unit, when the imaging device is connected, Picture Obtaining the data and the identification information, referring to the color misregistration characteristic storage table, selecting the composite color misregistration information corresponding to the acquired identification information, and based on the selected composite color misregistration information, The image color information is converted into display image color information which is the color information that cancels out the color change generated by the imaging unit and the display unit.

  In the color reproduction system according to a tenth aspect, in the above invention, the composite color misregistration information is stored as a composite color misregistration storage table in which the display image color information corresponding to the image color information is stored for each color. The color adjustment unit acquires the image data and the identification information when the imaging device is connected, refers to the color shift characteristic storage table, and refers to the composite color shift corresponding to the acquired identification information. A storage table is selected, and the image color information is converted into the display image color information with reference to the selected composite color misregistration storage table.

  The color reproduction system according to an eleventh aspect of the present invention is characterized in that, in the above invention, the plurality of basic colors include at least three primary colors of additive color mixture or three primary colors of subtractive color mixture.

  According to the color reproduction system of the present invention, when color misregistration occurs at least when the subject is imaged and when the image obtained by imaging the subject is displayed, the image data generated by imaging the subject is captured by the imaging device. When image processing is performed in the image, it is possible to display an image in which the color of the subject is accurately reproduced.

  Exemplary embodiments of a color reproduction system according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments. In the description of the drawings, the same parts are denoted by the same reference numerals.

(Embodiment 1)
First, the color reproduction system according to the first embodiment of the present invention will be described. FIG. 1 is a block diagram showing a configuration of a color reproduction system 100 according to the first embodiment. As shown in FIG. 1, the color reproduction system 100 includes an imaging device 1 and a projection device 11A as a display device to which the imaging device 1 is connected.

  The imaging device 1 is a digital camera, and includes an imaging unit 2 that images a subject and generates image data, an image processing unit 3 that performs various image processing on the image data, a storage unit 5 that stores various types of information, And a control unit 6 that controls processing and operation of each unit of the imaging apparatus 1.

  The imaging unit 2 includes an imaging lens 2a that forms a subject image, an imaging device 2b that captures the formed subject image, and a signal processing unit that acquires image signals from the imaging device 2b and performs predetermined signal processing. 2c and an A / D conversion unit 2d that converts an analog signal from the signal processing unit 2c into a digital signal. The image pickup device 2b is a single image pickup device such as a CCD or a CMOS, and color filters corresponding to the respective colors of RGB are arranged in a Bayer (checkered pattern) pattern on the image pickup surface. The signal processing unit 2c amplifies and outputs the image signal from the image sensor 2b after noise reduction by a CDS (Correlated Double Sampling) circuit or the like.

  The image processing unit 3 acquires RAW data that is image data output from the A / D conversion unit 2d, performs various image processing such as white balance and luminance correction, and converts the image data into an image file format such as JPEG format. Output.

  The storage unit 5 is a storage area for image processing, and stores an imaging color misregistration table 5a and RAW data 5b. The imaging color misregistration table 5a stores imaging color misregistration information indicating a color change that is generated when the imaging unit 2 images the subject. Note that the storage unit 5 may include a removable portable storage medium such as a compact flash (registered trademark), and may store processed image data processed by the image processing unit 3.

  When the imaging device 1 is connected to the projection device 11A, the control unit 6 outputs the imaging color misregistration table 5a and the RAW data 5b to the projection device 11A.

  On the other hand, the projection device 11A is a projector, and performs an image processing unit 12A for generating various types of image processing on the RAW data 5b acquired from the imaging device 1, and a projection optical system based on the projection image data. A projection signal processing unit 13 that generates a drive signal for the liquid crystal panel of 15A, a storage unit 14A that stores various information, and projection optics that projects a projection image as a color reproduction image on the screen SC based on the projection image data. The system 15A and the projection lens 16 are provided, and a control unit 17A that controls processing and operation of each unit of the projection device 11A.

  The image processing unit 12A includes a color adjustment unit 12a that converts image color information that is color information of the RAW data 5b. The image color information is color information affected by a color change that occurs when the imaging unit 2 captures an image of the subject, and indicates a color different from the actual color of the subject. The color adjustment unit 12a converts the image color information into subject color information indicating the color of the subject so that the subject color is accurately reproduced on the projection image, and the subject color information is used as the color information of the projection image data. To do. Note that the image color information and the subject color information are indicated by gradation values of three colors of RGB.

  The projection signal processing unit 13 outputs color component image signals corresponding to the RGB color component image data constituting the projection image data from the R driver 13R, G driver 13G, and B driver 13B, and the projection optical system 15A is RGB. The liquid crystal panel provided for each color is driven. The projection optical system 15A coaxially combines the light from the liquid crystal panels for each color illuminated by the lamp La, and the projection lens 16 projects the combined light onto the screen SC to form a projected image.

  When the imaging device 1 is connected to the projection device 11A, the control unit 17A acquires the imaging color misregistration table 5a from the imaging device 1, stores it in the storage unit 14A as the imaging color misregistration table 14a, and then stores the RAW data 5b. get. The color adjustment unit 12a refers to the imaging color misregistration table 14a and converts the image color information of the RAW data 5b into subject color information.

  Note that the RAW data 5b normally includes a plurality of image data, the control unit 17A sequentially acquires the plurality of image data, and the color adjustment unit 12a obtains the image color information as the subject every time the image data is acquired. Convert to color information.

  Here, the imaging color misregistration information stored as the imaging color misregistration tables 5a and 14a will be described. The imaging color misregistration information indicates a correspondence relationship between the image color information and the subject color information, and is obtained in advance based on spectral characteristics unique to the imaging lens 2a and the imaging element 2b. This spectral characteristic is represented by characteristic curves TR1, TG1, and TB1, for example, as shown in FIG. Each characteristic curve TR1, TG1, TB1 shows the spectral sensitivity characteristic of each color component image imaged by the imaging element 2b via the imaging lens 2a. Such spectral sensitivity characteristics are measured using a spectroscope or the like.

  When the spectral characteristics of the imaging lens 2a and the imaging element 2b are shown in FIG. 2, for example, when color light with a wavelength of 500 nm is imaged as light from the subject, output of each color component image signal corresponding to the characteristic curves TR1, TG1, TB1 The ratio of the values OR, OG and OB is OR: OG: OB = 0: 50: 50. Further, when color light having a wavelength range of 500 to 550 nm is imaged, the output value OR becomes 0, and the output ratio OG: OB is a ratio of values obtained by integrating the characteristic curves TG1 and TB1 in this wavelength range, as shown in FIG. The area ratio between the areas AR1 and AR2.

  Similarly, an output ratio OR: OG: OB is obtained for colored light in various wavelength ranges to be imaged. Then, the correspondence between the subject color information and the image color information can be obtained by associating each color light and the output ratio OR: OG: OB with RGB gradation values. When each color light is indicated by RGB gradation values, gradation display may be performed based on RGB unique to the projection device 11A.

  The imaging color misregistration tables 5a and 14a store subject color information (R0, G0, B0) corresponding to the image color information (R1, G1, B1), for example, as shown in FIG. Here, the image color information and the subject color information are shown as color information obtained by displaying 256 gradations of RGB. However, the color information is not limited to the 256 gradation display, and the number of gradations is increased or decreased according to the desired color resolution. It's okay.

  As described above, in the color reproduction system 100 according to the first embodiment, the color adjustment unit 12a acquires the imaging color misregistration table 14a and the RAW data 5b and stores the imaging color misregistration stored in the imaging color misregistration table 14a. Since the image color information is converted into subject color information based on the information, and the converted subject color information is used as the color information of the projection image data, the influence of the color change that occurs when the imaging device 1 captures the subject is corrected. Thus, a projection image that accurately reproduces the color of the subject can be displayed. In addition, since the color adjustment unit 12a converts the image color information with reference to the imaging color misregistration table 14a, the color information can be converted at high speed.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. In Embodiment 1 described above, the color reproduction image is corrected by correcting the influence of the color change that occurs when the imaging device captures an image of the subject, but in this Embodiment 2, the projection device projects the image. When a color change is generated when an image is displayed, the effect of the color change is further corrected to display a color reproduction image.

  FIG. 4 is a block diagram showing the configuration of the color reproduction system 200 according to the second embodiment. As shown in FIG. 4, the color reproduction system 200 includes a projection apparatus 11B instead of the projection apparatus 11A included in the color reproduction system 100. The projection device 11B includes an image processing unit 12B, a storage unit 14B, a projection optical system 15B, and a control unit 17B instead of the image processing unit 12A, the storage unit 14A, the projection optical system 15A, and the control unit 17A provided in the projection device 11A. Prepare. The image processing unit 12B includes a color adjustment unit 12b instead of the color adjustment unit 12a, and the storage unit 14B stores a projection color misregistration table 14b in addition to the imaging color misregistration table 14a. Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same components.

  Similarly to the control unit 17A, when the imaging device 1 is connected to the projection device 11B, the control unit 17B acquires the imaging color misregistration table 5a from the imaging device 1, and stores it in the storage unit 14A as the imaging color misregistration table 14a. After that, the RAW data 5b is acquired.

  Similar to the color adjustment unit 12a, the color adjustment unit 12b refers to the imaging color misregistration table 14a and converts the image color information of the RAW data 5b into subject color information. Further, the color adjustment unit 12b refers to the projection color misregistration table 14b and converts the subject color information into display image color information so that the color of the subject is accurately reproduced on the projection image. Here, the display image color information is a color obtained by subtracting the color change from the color of the subject to be displayed on the projection image so as to cancel the influence of the color change generated when the projection device 11B displays the projection image. The color information is indicated by the gradation values of three colors of RGB.

  The projection color misregistration table 14b stores projection color misregistration information indicating a color change generated by the projection device 11B. Specifically, the projection color misregistration information indicates the correspondence between the subject color information and the display image color information, and is based on the spectral characteristics unique to the projection optical system 15B, the projection lens 16, and the lamp La as display means. Required in advance.

  The inherent spectral characteristics include the spectral output characteristics of the lamp La, the spectral transmittance characteristics and spectral reflectance characteristics of optical elements such as a dichroic mirror included in the projection optical system 15B, and the spectral transmittance characteristics of the projection lens 16. The synthesized characteristics are represented by characteristic curves TR2, TG2, TB2 as shown in FIG. 5, for example. Each characteristic curve TR2, TG2, TB2 shows a spectral transmittance characteristic corresponding to each color component image of RGB constituting the projection image. Such spectral characteristics are measured using a spectroscope or the like.

  In the case of the spectral characteristics shown in FIG. 5, the color component represented by the G component liquid crystal panel is a color corresponding to the area AR3 obtained by integrating the characteristic curve TG2 with respect to the wavelength, and is a point on the chromaticity diagram shown in FIG. Indicated by G2. Similarly, the color components represented by the R component and B component liquid crystal panels are colors corresponding to the characteristic curves TR2 and TB2, and are indicated by points R2 and B2 on the chromaticity diagram, respectively. In this case, on the projection image, colors corresponding to the points in the triangle composed of the points R2, G2, and B2 on the chromaticity diagram are displayed according to the gradation values of the RGB colors of the display image color information.

  On the other hand, the color shown on the chromaticity diagram is a color indicated by the XYZ color system converted from the RGB color system by a predetermined primary conversion formula, and uniquely corresponds to the color indicated by the subject color information. Therefore, display color shift information can be obtained by associating subject color information corresponding to the same point on the chromaticity diagram and display color information.

  For example, as shown in FIG. 7, the projection color misregistration table 14b stores display image color information (R2, G2, B2) corresponding to subject color information (R0, G0, B0). Here, the subject color information and the display image color information are shown as color information in which RGB is displayed in 256 gradations, but the present invention is not limited to 256 gradation display, and the number of gradations is increased or decreased according to the desired color resolution. You may let me.

  As described above, in the color reproduction system 200 according to the second embodiment, after the color adjustment unit 12b converts the image color information of the RAW data 5b into subject color information with reference to the imaging color misregistration table 14a, Further, since the subject color information is converted into display image color information based on the display color misregistration information stored in the projection color misregistration table 14b, and the converted display image color information is used as the color information of the projection image data, the imaging apparatus 1 In addition, it is possible to display a projection image that accurately reproduces the color of the subject by correcting the influence of the color change generated by the projection device 11B. In addition, since the color adjustment unit 12b converts the image color information and the subject color information with reference to the imaging color misregistration table 14a and the projection color misregistration table 14b, the color information can be converted at high speed. it can.

  The color adjusting unit 12b generates, for example, combined color shift information obtained by combining the captured color shift information and the display color shift information, instead of sequentially referring to the captured color shift table 14a and the projected color shift table 14b. The image color information may be directly converted into display image color information based on the color misregistration information.

(Embodiment 3)
Next, a third embodiment of the present invention will be described. In the first and second embodiments described above, the projection devices 11A and 11B acquire RAW data from the imaging device 1, but in the third embodiment, the image data after digital conversion is processed. Image data and image processing information indicating the processing steps of this image processing are acquired.

  FIG. 8 is a block diagram showing the configuration of the color reproduction system 300 according to the third embodiment. As shown in FIG. 8, the color reproduction system 300 includes an imaging device 21 and a projection device 31. The imaging device 21 includes an imaging unit 22, an image processing unit 23, a storage unit 25, and a control unit 26 instead of the imaging unit 2, the image processing unit 3, the storage unit 5, and the control unit 6 included in the imaging device 1. The imaging unit 22 includes an imaging unit 22b instead of the imaging element 2b, and the storage unit 25 stores the imaging color misregistration table 25a and the processed image data 25b instead of the imaging color misregistration table 5a and the RAW data 5b. The image processing information 25c is newly stored.

  On the other hand, the projection device 31 includes an image processing unit 32, a storage unit 34, and a control unit 37 instead of the image processing unit 12B, the storage unit 14B, and the control unit 17B included in the projection device 11B. The image processing unit 32 includes a color adjustment unit 32a instead of the color adjustment unit 12b. The storage unit 34 stores the imaging color misregistration table 34a instead of the imaging color misregistration table 14a, and newly adds image processing information. 34c is stored. Other configurations are the same as those of the second embodiment, and the same reference numerals are given to the same components.

  The imaging device 21 is a three-plate TV camera, and the imaging unit 22b captures a color separation prism that separates light from the imaging lens 2a into RGB color light and a subject image for each RGB color. It includes image sensors 2R, 2G, 2B such as CCD and CMOS.

  The image processing unit 23 acquires image data from the A / D conversion unit 2d, performs image processing such as white balance and luminance correction, and converts the processed image data of the image processing result into an image file format such as MPEG format. Image processing information indicating the processing steps of the image processing is output and stored in the storage unit 25 as processed image data 25b and image processing information 25c, respectively. Note that the storage unit 25 may include a removable portable storage medium such as a DVD or a video tape, and may store processed image data and the like.

  The imaging color misregistration table 25a stores imaging color misregistration information of the imaging unit 22 in the same manner as the imaging color misregistration table 5a. The imaging color misregistration information of the imaging unit 22 is based on the spectral transmittance characteristics of the imaging lens 2a, the spectral transmittance characteristics of the color separation prism provided in the imaging unit 22b, and the spectral sensitivity characteristics of the imaging elements 2R, 2G, and 2B. Sought in advance.

  When the imaging device 21 is connected to the projection device 31, the control unit 26 outputs the imaging color misregistration table 25 a, the processed image data 25 b, and the image processing information 25 c to the projection device 31.

  On the other hand, when the imaging device 21 is connected to the projection device 31, the control unit 37 acquires the imaging color misregistration table 25a and the image processing information 25c from the imaging device 21, and the imaging color misregistration table 34a and the image processing information 34c, respectively. After being stored in the storage unit 34, the processed image data 25b is acquired.

  Based on the image processing information 34c, the color adjustment unit 32a reverses the image processing performed by the image processing unit 23 to return the processed image data 25b to the image data after digital conversion. Further, similarly to the color adjustment unit 12b, the color adjustment unit 32a refers to the imaging color misregistration table 34a and the projection color misregistration table 14b, and converts the image color information of the image data after digital conversion into display image color information. The color information of the projection image data is used.

  The processed image data 25b usually includes a plurality of image data, the control unit 37 sequentially acquires the plurality of image data, and the color adjustment unit 32a acquires the image data every time the image data is acquired. It returns to the image data after digital conversion and converts the image color information into display image color information.

  As described above, in the color reproduction system 300 according to the third embodiment, the color adjustment unit 32a returns the processed image data 25b to the image data after digital conversion based on the image processing information 34c, and then the image color. Since the information is converted into display image color information, even when image processing such as white balance is performed on the image data after digital conversion in the imaging device 21, the influence of this image processing is corrected. A color reproduction image that accurately reproduces the color of the subject can be displayed. Further, it is not necessary for the imaging device 21 to store the image data after digital conversion, and the storage area can be saved.

  In the color reproduction system 300, the storage unit 34 stores the projection color misregistration table 14b, and the color adjustment unit 32a refers to the projection color misregistration table 14b so as to convert subject color information into display image color information. However, when the projection device 31 does not generate a color change when displaying the projection image, it is not necessary to store the projection color misregistration table 14b, and the subject color information is converted into display image color information. There is no need to do.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described. In Embodiments 1 to 3 described above, the projection apparatus acquires imaging color misregistration information from the imaging apparatus. However, in Embodiment 4, imaging color misregistration information corresponding to each connectable imaging apparatus. Is stored in advance.

  FIG. 9 is a block diagram showing a configuration of a color reproduction system 400 according to the fourth embodiment. As shown in FIG. 9, the color reproduction system 400 includes an imaging device 41-i and a projection device 51. The imaging device 41-i is one of a plurality of imaging devices that can be connected to the projection device 51, and includes a storage unit 45 and a control unit 46 instead of the storage unit 5 and the control unit 6 provided in the imaging device 1. . Also, the storage unit 45 newly stores the imaging device identification information 45a-i without storing the imaging color misregistration table 5a stored in the storage unit 5.

  On the other hand, the projection device 51 includes an image processing unit 52, a storage unit 54, and a control unit 57 instead of the image processing unit 12B, the storage unit 14B, and the control unit 17B included in the projection device 11B. The image processing unit 52 includes a color adjustment unit 52a in place of the color adjustment unit 12b, and the storage unit 54 stores a color shift characteristic table 54b in place of the imaging color shift table 14a and the projection color shift table 14b. The imaging device identification table 54a is newly stored. Other configurations are the same as those of the second embodiment, and the same reference numerals are given to the same components.

  When the imaging device 41-i is connected to the projection device 51, the control unit 46 outputs the imaging device identification information 45 a-i and the RAW data 5 b to the projection device 51. Here, the imaging device identification information 45a-i is identification information for the projection device 51 to identify the imaging device 41-i.

  When the imaging device 41-i is connected to the projection device 51, the control unit 57 acquires the imaging device identification information 45a-i from the imaging device 41-i and refers to the imaging device identification table 54a to identify the imaging device. After selecting the composite color misregistration table 54b-i corresponding to the information 45a-i from the color misregistration characteristic table 54b, the RAW data 5b is acquired. Then, the color adjustment unit 52a converts the image color information of the RAW data 5b into display image color information based on the combined color shift information stored in the conversion color table 54b-i, and the color information of the projection image data To do.

  The RAW data 5b normally includes a plurality of image data, the control unit 57 sequentially acquires the plurality of image data, and the color adjustment unit 52a displays image color information every time the image data is acquired. Convert to image color information.

  The composite color misregistration information stored as the composite color misregistration tables 54b-1 to 54b-n is the color change generated when the imaging unit 2 images the subject, and the projection optical system 15B, the projection lens 16, and the lamp La project the image. FIG. 10 shows a color change obtained by combining color changes generated when an image is displayed. For example, as shown in FIG. 10, image color information (R1, G1, B1) and display image color information (R2, G2, B2) The correspondence relationship is shown. The composite color misregistration tables 54b-1 to 54b-n store imaging device identification information together with the composite color misregistration information, for example, as shown in FIG.

  As described above, in the color reproduction system 400 according to the fourth embodiment, the projection device 51 stores the composite color misregistration tables 54b-1 to 54b-n corresponding to the connectable imaging devices, and the imaging device 41- When i is connected, the color adjustment unit 52a directly converts the image color information into the display image color information based on the composite color shift information stored in the conversion color table 54b-i. Conversion of color information can be performed at higher speed.

  In the color reproduction systems 100 to 400 according to the first to fourth embodiments described above, various types of color information are indicated by the gradation values of the three colors RGB, which are additive primary colors, but the subtractive primary colors are used. It may be indicated by gradation values of CMY (Cyan, Magenta, Yellow), or may be indicated by gradation values of four or more basic colors obtained by adding other colors to these three primary colors. Good.

  In the color reproduction systems 100 to 400 according to the first to fourth embodiments described above, the projector is used as the display device for the color reproduction image. However, the color reproduction image is displayed on a liquid crystal display, a CRT monitor, or the like. May be.

It is a block diagram which shows the structure of the color reproduction system concerning Embodiment 1 of this invention. It is a figure which shows the spectral characteristic of the imaging part shown in FIG. It is a figure which shows an example of the imaging color shift table shown in FIG. It is a block diagram which shows the structure of the color reproduction system concerning Embodiment 2 of this invention. It is a figure which shows the spectral characteristics of the projection optical system shown in FIG. 4, and a lamp | ramp. It is a figure explaining the correspondence of subject color information and display image color information. FIG. 5 is a diagram illustrating an example of a projection color misregistration table illustrated in FIG. 4. It is a block diagram which shows the structure of the color reproduction system concerning Embodiment 3 of this invention. It is a block diagram which shows the structure of the color reproduction system concerning Embodiment 4 of this invention. It is a figure which shows an example of the synthetic | combination color shift table shown in FIG.

Explanation of symbols

1,21,41-i imaging device 2,22 imaging unit 3,12A, 12B, 23,32,52 image processing unit 5,14A, 14B, 25,34,45,54 storage unit 6,17A, 17B, 26 , 37, 46, 57 Control unit 11A, 11B, 31, 51 Projection device 12a, 12b, 32a, 52a Color adjustment unit 13 Projection signal processing unit 15A, 15B Projection optical system 16 Projection lens La lamp

Claims (11)

Imaging means for imaging a subject and generating image data;
An imaging color misregistration storage unit for storing imaging color misregistration information indicating a color change generated when the imaging unit images a subject;
An imaging device having
Color adjusting means for converting image color information of the image data which is color information indicated by gradation values of a plurality of basic colors;
Display means for displaying a color reproduction image for reproducing the color of the subject based on the image data obtained by converting the image color information by the color adjustment means;
A display device having
The color adjustment unit acquires the image data and the imaging color misregistration information when the imaging device is connected, and based on the acquired imaging color misregistration information, the image color information is used to determine the color of the subject. A color reproduction system characterized by converting into subject color information which is the color information shown. The imaging color misregistration information is stored as an imaging color misregistration storage table storing the subject color information corresponding to the image color information for each color,
The color adjustment unit acquires the image data and the imaging color misregistration storage table when the imaging device is connected, and refers to the acquired imaging color misregistration storage table to obtain the image color information as the subject color. The color reproduction system according to claim 1, wherein the color reproduction system is converted into information. The display device further includes a display color misregistration storage unit that stores display color misregistration information indicating a color change generated when the display unit displays a color reproduction image.
The color adjustment unit acquires the image data and the imaging color misregistration information when the imaging device is connected, and uses the image color information as the subject color information based on the acquired imaging color misregistration information. And converting the converted subject color information into display image color information, which is the color information that cancels out the color change generated by the display means, based on the display color shift information. Item 2. The color reproduction system according to Item 1. The imaging color misregistration information is stored as an imaging color misregistration storage table storing the subject color information corresponding to the image color information for each color,
The display color misregistration information is stored as a display color misregistration storage table in which the display image color information corresponding to the subject color information is stored for each color.
The color adjustment unit acquires the image data and the imaging color misregistration storage table when the imaging device is connected, and refers to the acquired imaging color misregistration storage table to obtain the image color information as the subject color. 4. The color reproduction system according to claim 3, wherein the information is converted into information, and the converted subject color information is converted into the display image color information with reference to the display color misregistration storage table. Imaging means for imaging a subject and generating image data;
An imaging color misregistration storage unit for storing imaging color misregistration characteristics indicating a color change generated when the imaging unit images an object;
Image processing means for performing image processing on the image data to generate processed image data, and generating image processing information indicating a processing step of the image processing;
An imaging device having
Color adjusting means for converting the processed image data into the image data and converting image color information of the image data which is color information indicated by gradation values of a plurality of basic colors;
Display means for displaying a color reproduction image for reproducing the color of the subject based on the image data obtained by converting the image color information by the color adjustment means;
A display device having
The color adjustment unit acquires the processed image data, the image processing information, and the imaging color misregistration information when the imaging device is connected, and the processed image data is acquired based on the acquired image processing information. The image data is converted into image data, and the image color information of the converted image data is converted into subject color information that is the color information indicating the color of the subject based on the acquired imaging color misregistration information. Color reproduction system. The imaging color misregistration information is stored as an imaging color misregistration storage table storing the subject color information corresponding to the image color information for each color,
The color adjustment unit acquires the processed image data, the image processing information, and the imaging color misregistration storage table when the imaging device is connected, and based on the acquired image processing information, the processed image data The image color information of the converted image data is converted into the subject color information with reference to the acquired imaging color misregistration storage table. Color reproduction system. The display device further includes a display color misregistration storage unit that stores display color misregistration information indicating a color change generated when the display unit displays the color reproduction image.
The color adjustment unit acquires the processed image data, the image processing information, and the imaging color misregistration information when the imaging device is connected, and the processed image data is acquired based on the acquired image processing information. Converting to the image data, converting the image color information of the converted image data into the subject color information based on the acquired imaging color shift information, and converting the image data based on the display color shift information 6. The color reproduction system according to claim 5, wherein the subject color information is converted into display image color information that is the color information that cancels a color change generated by the display means. The imaging color misregistration information is stored as an imaging color misregistration storage table storing the subject color information corresponding to the image color information for each color,
The display color misregistration information is stored as a display color misregistration storage table in which the display image color information corresponding to the subject color information is stored for each color.
The color adjustment unit acquires the processed image data, the image processing information, and the imaging color misregistration storage table when the imaging device is connected, and based on the acquired image processing information, the processed image data Is converted into the image data, the image color information of the converted image data is converted into the subject color information with reference to the acquired imaging color misregistration storage table, and the display color misregistration storage table is referred to. The color reproduction system according to claim 7, wherein the converted subject color information is converted into the display image color information. Imaging means for imaging a subject and generating image data;
Identification information storage means for storing identification information for identifying the device itself;
An imaging device having
Color adjusting means for converting image color information of the image data which is color information indicated by gradation values of a plurality of basic colors;
Display means for displaying a color reproduction image for reproducing the color of the subject based on the image data obtained by converting the image color information by the color adjustment means;
Corresponding color shift information indicating a color change obtained by synthesizing a color change generated when the imaging unit images a subject and a color change generated when the display unit displays the color reproduction image corresponds to each imaging device. A color misregistration characteristic storage table stored as
A display device having
The color adjustment unit acquires the image data and the identification information when the imaging device is connected, refers to the color shift characteristic storage table, and the composite color shift information corresponding to the acquired identification information And converting the image color information into display image color information that is the color information that cancels out the color change generated by the imaging unit and the display unit, based on the selected combined color misregistration information. A color reproduction system characterized by The composite color shift information is stored as a composite color shift storage table storing the display image color information corresponding to the image color information for each color,
The color adjustment unit acquires the image data and the identification information when the imaging device is connected, refers to the color shift characteristic storage table, and stores the combined color shift corresponding to the acquired identification information. 10. The color reproduction system according to claim 9, wherein a table is selected, and the image color information is converted into the display image color information with reference to the selected composite color misregistration storage table.   The color reproduction system according to claim 1, wherein the plurality of basic colors include at least three primary colors of additive color mixture or three primary colors of subtractive color mixture.

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