JP5920580B2 - Color processing device, color conversion device, color processing program, color conversion program - Google Patents

Description

  The present invention relates to a color processing device, a color conversion device, a color processing program, and a color conversion program.

  When forming a color image, a color material of a basic color (hereinafter referred to as a basic color) necessary for forming the color image, for example, a color of C (cyan) M (magenta) Y (yellow) Various colors are reproduced using materials or color materials such as R (red), G (green), and B (blue). When CMY is used as the basic color, a K (black) color material may also be used. In recent years, there is a case where a color material having a color different from these basic colors and K (hereinafter referred to as a special color) is used. For example, when CMY is used as a basic color, or CMY and K are used, one or several color materials among colors such as R, O (orange), G, B, and V (violet) may be used. is there.

  A metallic color may be used as the spot color. The metallic color is generally used to reproduce a sparkling feeling. For example, in Patent Document 1, a color signal of a metallic color designated as one of color signal components is received together with signals of other colors, and a color material of a certain metallic color and a color material other than the metallic color are used in advance. A specified metallic color is reproduced from the determined metallic colors.

  On the other hand, in an apparatus for forming an image, the color reproduced in the formed image may be different even if a certain color signal is given. This is caused by various factors such as an image forming method, a color material to be used, and an environment for forming an image. There has been developed a technique for eliminating such a difference in reproduced colors and performing color conversion so that a color represented by a given color signal is reproduced in a formed image. For example, an image formed by giving a certain color signal may be subjected to color measurement, and the color signal may be converted so as to become a color signal having a colorimetric value. This color conversion technique is exemplified in Japanese Patent Application Laid-Open No. H11-228707, for example, when CMY is a basic color and a special color such as O or RGB is used together with K.

  However, metallic colors have different characteristics from special colors such as O and RGB. Since the metallic color reproduces a sparkling feeling, it may be recognized as a brighter color than the measured color. In addition, since the metallic color material is not transparent, the saturation is lowered when used together with the other color materials than when the metallic color material is not used. The color range (color gamut) of the special colors such as O and RGB is higher than that when these special colors are not used. For example, the color gamut may vary depending on the use of metallic colors. Will not spread.

  As described above, the metallic color has characteristics different from those of other special colors such as O and RGB, and even if an image is formed by performing the color conversion for color matching as described above, an apparent color is displayed. May differ from the color specified by the color signal. For this reason, the color conversion for matching the color in the above-described colorimetric manner has not been performed for the metallic color.

JP 2006-50347 A JP 2004-194042 A

  The present invention relates to a color processing device, a color conversion device, a color processing program, and a color processing method for determining a color material amount in which a color of a given color signal is reproduced while suppressing an apparent color change even when a metallic color is used. The object is to provide a conversion program.

  According to the first aspect of the present invention, there is provided a maximum amount determining means for determining a maximum value of a color material amount of a metallic color when reproducing a color of the color signal from a given color signal, and saturation of the color signal. Is higher, the adjustment means for adjusting the color material amount of the metallic color within the range of the maximum value determined by the maximum amount determination means with respect to the apparent color change due to the metallic color, the color signal, The color processing apparatus further includes color material amount determining means for determining a color material amount other than the metallic color from the metallic color material amount adjusted by the adjusting means.

  The invention described in claim 2 of the present application is characterized in that the adjusting means in the invention described in claim 1 performs an adjustment to reduce the amount of the color material of the metallic color as the lightness is lower for a color having a predetermined lightness or less. And a color processing apparatus.

  In the invention described in claim 3 of the present application, the adjusting means in the invention described in claim 1 or 2 of the present application performs adjustment to reduce the amount of the color material of the metallic color as the lightness is higher for a color having a predetermined lightness or higher. The color processing apparatus is characterized in that it performs.

  The invention according to claim 4 of the present application further includes an adjustment in which the adjusting means in the invention according to any one of claims 1 to 3 further reduces the amount of the color material of the metallic color according to the setting for the metallic feeling. The color processing apparatus is characterized in that it performs.

  The invention according to claim 5 of the present application provides a plurality of color signals including a plurality of color signals and a metallic color obtained by the color processing device according to any one of claims 1 to 4 for each of the color signals. It is a color conversion device characterized by having a conversion means for converting a given color signal into a plurality of color material amounts including a metallic color using a pair with the material amount.

  The invention according to claim 6 of the present application is the same as that of the invention according to claim 5 of the present invention, but further includes changing means for changing the color material amount of the metallic color, and the color material amount of the metallic color changed by the changing means. The color conversion apparatus includes correction means for correcting a color material amount other than the metallic color based on the above.

  The invention described in claim 7 is a color processing program that causes a computer to execute the function of the color processing apparatus described in any one of claims 1 to 4.

  The invention according to claim 8 of the present application is a color conversion program for causing a computer to execute the function of the color conversion apparatus according to claim 5 or claim 6.

  According to the invention of claim 1 of the present application, it is possible to suppress an apparent color change that occurs when a metallic color is used, in which the saturation of the reproduced color appears to be apparently lowered. There is an effect that it is possible to determine the color material amount of each color in which the color of the color signal is reproduced.

  According to the second aspect of the present invention, it is possible to prevent the reproduced color from appearing bright by using the metallic color.

  According to the third aspect of the present invention, it is possible to prevent the reproduced color from appearing dark by using the metallic color.

  According to the invention described in claim 4 of the present application, the amount of the color material of the metallic color can be adjusted according to the metallic feeling to be obtained.

  According to the fifth aspect of the present invention, it is possible to perform color conversion while suppressing an apparent color change that occurs when a metallic color is used.

  According to the sixth aspect of the present invention, even when the amount of the metallic color material is adjusted in accordance with the metallic feeling to be obtained, color conversion that reproduces the color of the given color signal can be performed. it can.

  According to the invention of claim 7 of the present application, the effect of the invention of any one of claims 1 to 4 can be obtained.

  According to the invention described in claim 8 of the present application, the effect of the invention described in claim 5 or 6 of the present application can be obtained.

It is a block diagram which shows one Embodiment of the color processing apparatus of this invention. It is a flowchart which shows an example of the operation | movement in one Embodiment of the color processing apparatus of this invention. It is explanatory drawing of an example of the adjustment method of the coloring material amount of a metallic color. 1 is a configuration diagram showing a first embodiment of a color conversion apparatus of the present invention. It is a block diagram which shows 2nd Embodiment of the color conversion apparatus of this invention. FIG. 1 is a diagram illustrating an example of a computer program, a storage medium storing the computer program, and an example of a computer when the functions described in the embodiments of the color processing apparatus and the color conversion apparatus of the present invention are implemented by a computer program. It is.

FIG. 1 is a configuration diagram showing an embodiment of a color processing apparatus of the present invention. In the figure, 11 is a maximum metallic amount determining unit, 12 is a metallic amount setting unit, 13 is a metallic amount adjusting unit, 14 is a color material amount determining unit, and 15 is an image recording signal output unit. In the illustrated example, a color signal in the LAB color space (L ^* a ^* b ^* color signal) is given as the color signal. However, the present invention is not limited to this, and device-independent color spaces such as LUV color space and sRGB color space, and color signals in device-dependent color spaces such as CMY, CMYK, and RGB may be used. In addition to using the color signals in these color spaces as processing targets, the color signals may be given after being converted to the processing target color space such as the LAB color space. Further, it may be configured such that it is instructed by a spot color name or the like and converted into a corresponding color signal. The color material colors indicated by the output image recording signal are also combinations of C, M, Y and S indicating metallic colors in this example. However, the present invention is not limited to this example, and CMYK and S, RGB and S, etc. , A combination of other colorant colors including the metallic color S may be used.

  The maximum metallic amount determination unit 11 determines the maximum color material amount Smax of the metallic color when reproducing the color of the color signal from the given color signal. There are various determination methods. For example, the determination method of the maximum black amount and the maximum special color amount described in Patent Document 2 may be used for the metallic color.

  The metallic amount setting unit 12 sets at least how much metallic feeling is to be produced. Further, the metallic amount adjustment unit 13 may perform settings used for adjustment. When such setting is performed in a fixed manner, the metallic amount setting unit 12 may be omitted.

  The metallic amount adjustment unit 13 adjusts the metallic color amount in a range equal to or less than the maximum value Smax of the metallic color amount determined by the maximum metallic amount determination unit 11 with respect to the apparent color change due to the metallic color. The adjusted color material amount after adjustment is defined as So. This adjustment may be performed based on the lightness or saturation of a given color signal. As an example, the color material amount of the metallic color is adjusted to decrease as the lightness is lower for a color having a predetermined lightness or less, and the color material amount of the metallic color is decreased as the lightness is higher for a color having a predetermined lightness or higher. Adjustments are made, and adjustments are made to reduce the amount of metallic color material as the saturation increases. The setting of these adjustments is performed by the metallic amount adjustment unit 13 or the setting by the metallic amount setting unit 12 may be used. Furthermore, when the metallic amount setting unit 12 is set for the metallic feeling, an adjustment for reducing the metallic material amount of the metallic color may be further performed according to the setting for the metallic feeling.

  The color material amount determination unit 14 determines a color material amount other than the metallic color from the supplied color signal and the color material amount So of the metallic color adjusted by the metallic amount adjustment unit 13. In the example shown in FIG. 1, the color material amounts Co, Mo, and Yo of the colors C, M, and Y are determined. The determination method may be a conventional method. For example, a neural network or a weighted regression model may be used.

  The image recording signal output unit 15 includes the metallic color material amount So adjusted by the metallic amount adjustment unit 13 and the color material amounts of colors other than the metallic color determined by the color material amount determination unit 14 (Co, Mo in this example). , Yo). Co, Mo, Yo and So are output as image recording signals.

Hereinafter, an example of the operation in the embodiment of the color processing apparatus of the present invention described above will be described using specific examples. FIG. 2 is a flowchart showing an example of the operation in the embodiment of the color processing apparatus of the present invention. In S1, a given color signal is received. Here, the color signal is assumed to be an L ^* a ^* b ^* color signal, but if it is a color signal other than this, it may be converted into an L ^* a ^* b ^* color signal in advance.

In S <b> 2, the maximum metallic amount determination unit 11 determines the maximum value Smax of the metallic color amount when reproducing the color of the color signal from the given color signal. As described above, there are various known methods for this determination. As an example, there is a method using a color conversion model described in Patent Document 2. By measuring colors reproduced in advance by various combinations of C, M, Y, and S values and obtaining L ^* a ^* b ^* values, a plurality of (C, M, Y, S) and ( A set of L ^* , a ^* , b ^* ) is obtained. By using this set, a functional relationship of (L ^* , a ^* , b ^* ) = f (C, M, Y, S) is obtained, and this may be used as a color conversion model. Using this color conversion model, values of C, M, and Y are obtained from the color material amount S of the metallic color and the given L ^* a ^* b ^* color signal. Whether C, M, and Y are in a predetermined range, or an L ^* a ^* b ^* value obtained from the values of C, M, Y, and S and a given L ^* a ^* b ^* color signal It is determined whether the color difference is a predetermined range. By making such a determination while changing the color material amount S of the metallic color, the maximum value Smax of the color material amount of the metallic color may be determined.

  In S <b> 3, the metallic amount adjustment unit 13 adjusts the metallic color amount in a range equal to or less than the maximum value Smax of the metallic color amount determined by the maximum metallic amount determination unit 11. Even if the value obtained by measuring the color reproduced using the metallic color becomes the value of the given color signal, the reproduced apparent color may change due to the use of the metallic color. Adjustment of the color material amount of the metallic color in the metallic amount adjustment unit 13 corresponds to such a case. In addition, the color material amount of the metallic color may be adjusted according to the setting indicating how much metallic feeling is expressed in the reproduced image.

  FIG. 3 is an explanatory diagram illustrating an example of a method for adjusting the color material amount of the metallic color. FIG. 3A shows an example of the relationship between the lightness and the usage rate with respect to the maximum value of the color material amount of the metallic color, and FIG. 3B shows the use of the saturation and the maximum value of the color material amount of the metallic color. An example of the relationship with the rate is shown. In each figure, the thick line indicates the case where the metallic feeling is the strongest compared to the other cases, the broken line indicates the case where the metallic feeling is reduced as compared to the solid line, and the dotted line indicates the case where the metallic feeling is reduced as compared with the broken line. ing. In the case where the metallic feeling is not given, the usage rate with respect to the maximum value of the color material amount of the metallic color may be set to zero.

In the example shown in FIG. 3A, in the example in which the metallic feeling indicated by the bold line is maximized, the usage rate is maximized (100%) when the lightness (L ^* ) is p or more and q or less, and the metallicity is within this lightness range. The feeling is demonstrated. Further, the usage rate is decreased as the brightness decreases from the brightness p. When the metallic color is used in the low-lightness dark color, the apparent color is brightly recognized. By controlling in this way, the use of the metallic color is suppressed at the low-lightness and the apparent color becomes brighter. Is prevented. Further, the usage rate is decreased as the brightness increases from the brightness q. A bright color with high brightness exhibits a metallic feeling, but when the metallic color is used, the apparent color is visually perceived as dark. Control as in this example suppresses the use of metallic colors at high brightness and prevents the apparent color from becoming dark.

In addition, since a metallic feeling is exhibited in the low saturation color, the saturation (C ^* ) is used in the example shown in FIG. 3B in which the metallic feeling indicated by the bold line is maximized. The rate is 100%. Further, the usage rate is reduced as the saturation increases, and the usage rate becomes 0% at the saturation r or higher. The use of metallic colors in vivid colors with high saturation makes the apparent color dull and visible, but this control suppresses the use of metallic colors in high saturation colors and makes the apparent color Prevents dullness.

  In both cases of FIGS. 3A and 3B, the usage rate when the metallic feeling shown by the bold line is maximized is multiplied by a coefficient corresponding to the setting of the metallic feeling, and the usage rate in each metallic feeling is obtained. An example in which the setting is obtained is indicated by a broken line and a dotted line. Of course, the usage rate is not limited to this example. For example, the usage rate corresponding to the metallic feel setting is obtained by other methods such as setting the usage rate that is the upper limit according to the metallic feel setting and clipping at the upper usage rate. May be.

  Of course, the usage rates when the metallic feeling shown by the thick lines in FIGS. 3A and 3B is maximized are also examples, and the usage rates may be set without being limited to these examples. . In that case, it is preferable to set the usage rate to be lower than that of the other colors in one or more of the low brightness color, the high brightness color, and the high saturation color.

  Either the usage rate according to lightness shown in FIG. 3 (A) and the usage rate according to saturation shown in FIG. 3 (B) may be used, or both may be shared. Good. In the case of sharing, for example, the usage rate according to lightness is αL, the usage rate according to saturation is αC, the usage rate when sharing is α, and α = f (αL, αC using the function f. It may be adjusted by using the usage rate α obtained by (1). For simplicity, α may be set to αL · αC.

  Further, when there is a setting relating to metallic feeling, in this example, αL and αC are values including the setting. For example, in the case where the metallic feeling indicated by a thick line in FIGS. 3A and 3B is maximized. The usage rate may be determined by α = β · αL · αC, where αL and αC are the usage rates, and β is the coefficient corresponding to the set metallic feeling. Of course, the usage rate α may be set according to the color in the metallic amount setting unit 12, and the usage rate α may be selected and used according to the given color signal.

  The metallic amount adjusting unit 13 multiplies the maximum value Smax of the metallic color amount determined by the maximum metallic amount determining unit 11 by the usage rate α of the obtained metallic color amount, and after adjustment The color material amount So of the metallic color may be obtained as So = α · Smax. Of course, a value obtained by a function using the usage rate α may be multiplied.

Returning to FIG. 2, in S <b> 4, the color material amount determination unit 14 determines the color material amount other than the metallic color, here, the color material amount So of the metallic color adjusted by the metallic color adjustment unit 13. The color material amounts Co, Mo, and Yo of the colors C, M, and Y are determined. This determination is made, for example, by the color conversion model (L ^* , a ^* , b ^* ) = f (C, M, Y, S) inverse conversion model (C, M, Y, S) = f ⁻¹ (L ^* , a ^* , b ^* ), S is fixed to So in this inverse transformation model, and the color material amount Co, by (Co, Mo, Yo) = f ⁻¹ (L ^* , a ^* , b ^* , So) What is necessary is just to determine Mo and Yo. In solving this inverse transformation model, a numerical solution method of a nonlinear equation such as a simplex method or a Newton method may be applied. When the inverse transformation model is used, the color material amounts Co, Mo, and Yo that obtain the color signals (L ^* , a ^* , b ^* ) given when the reproduced color is measured are obtained. Of course, in addition to using an inverse transformation model, the color material amounts Co, Mo, and Yo may be determined by other methods such as a neural network.

In S <b> 5, the image recording signal output unit 15 determines the metallic color material amount So adjusted by the metallic amount adjustment unit 13 and the color material amount of colors other than the metallic color determined by the color material amount determination unit 14. Then, the color material amounts Co, Mo, and Yo are output as image recording signals. The colors reproduced by the output color material amounts Co, Mo, Yo, and So are colors that become a given color signal (L ^* , a ^* , b ^* ) when colorimetry is performed. By adjusting the color material amount So of the metallic color, an apparent color difference due to the use of the color material of the metallic color is avoided.

  In the above description, C, M, and Y color materials are used together with the metallic color. For example, when K color materials are used, or when special color materials other than these colors are used, K or The color material amount of the special color may be determined by the color material amount determination unit 14. In this case, for example, the color material amount of each color including K or further special color other than the metallic color may be determined by the method described in Patent Document 2 or other known methods. Alternatively, the color material amount for K or further special color is determined, the maximum value of the color material amount of the metallic color under the conditions is determined by the maximum metallic amount determination unit 11 and adjusted by the metallic amount adjustment unit 13, and the remaining C Alternatively, the color material amount determination unit 14 may determine the color material amounts of M, Y.

FIG. 4 is a block diagram showing the first embodiment of the color conversion apparatus of the present invention. In the figure, 21 is a three-dimensional color conversion unit, and 22 is a one-dimensional color conversion unit. Also in this illustrated example, it is assumed that a color signal (L ^* a ^* b ^* color signal) in the LAB color space is given as a color signal, and the color material amount of each color of C, M, Y and metallic color S is obtained. It is supposed to be. The color signal to be given is not limited to this, and may be a device-independent color space such as an LUV color space or an sRGB color space, or a color signal in a device-dependent color space such as CMY, CMYK, or RGB. In addition to using the color signals in these color spaces as processing targets, the color signals may be given after being converted to the processing target color space such as the LAB color space. Further, it may be configured such that it is instructed by a spot color name or the like and converted into a corresponding color signal. In addition, in this example, the amount of each color material to be output is a combination of C, M, Y and S indicating a metallic color. However, the present invention is not limited to this example, and metallic colors S such as CMYK and S, RGB and S are used. It may be a combination of other colorant colors, and is not limited to the number of colors.

The three-dimensional color conversion unit 21 performs color conversion from a given L ^* a ^* b ^* color signal to a set of color material amounts of each color (in this example, C, M, Y, S) including a metallic color. . For example, the configuration shown in FIG. 1 as an embodiment of the color processing apparatus of the present invention may be used, but in this example, a case in which the storage unit and the interpolation unit are used will be described. The storage means stores a plurality of pairs of L ^* a ^* b ^* color signals and CMYS pairs. Alternatively, a set of CMYS is stored in an address obtained from the pair of L ^* a ^* b ^* color signals. This pair, for example, gives an L ^* a ^* b ^* color signal to the configuration shown as an embodiment of the color processing apparatus of the present invention in FIG. 1, and the obtained image recording signals are Co, Mo, Yo. , So may be paired with a given L ^* a ^* b ^* color signal. Then, when the L ^* a ^* b ^* color signal is given to the three-dimensional color conversion unit 21, one or a plurality of pairs are selected based on the L ^* a ^* b ^* color signal, and the paired image recording is performed. Get the signal. When one pair is selected, the acquired image recording signal may be used as the output of the three-dimensional color conversion unit 21. When a plurality of pairs are selected, a plurality of image recording signals may be interpolated by an interpolation unit, and the interpolation result may be used as the output of the three-dimensional color conversion unit 21. The interpolation method may be selected from various known interpolation methods. Of course, the present invention is not limited to such a configuration. For example, it is configured by a neural network and the above-described pair is given as a teacher signal for learning, and other types of conversion from L ^* a ^* b ^* color signals to CMYS sets are possible. It may be a conversion method.

  In the example shown in FIG. 4, a one-dimensional color conversion unit 22 is further provided. The one-dimensional color conversion unit 22 is provided to adjust the color material amount for each color material amount output from the three-dimensional color conversion unit 21. Of course, the one-dimensional color conversion unit 22 may be omitted.

FIG. 5 is a block diagram showing a second embodiment of the color conversion apparatus of the present invention. In the figure, 31 is a metallic amount changing unit, 32 is a color reproduction predicting unit, and 33 is a color material amount correcting unit. When using a metallic color, it is used to give a brilliant feeling, but it may be required to increase or decrease the brilliant feeling. Will increase or decrease. For example, in the configuration shown in FIG. 4, when the three-dimensional color conversion unit 21 is configured by a storage unit and an interpolation unit, it is assumed that a metallic color material is used according to a certain design, and given L ^* a ^* b ^*. CMYS corresponding to the color signal is output, and the color material amount of the metallic color is increased or decreased by the one-dimensional color conversion unit 22. When the color material amount of the metallic color is changed by the one-dimensional color conversion unit 22, the reproduced color may be changed. The configuration shown in FIG. 5 is to maintain the reproduced color even when the color material amount of the metallic color is changed in this way.

In the second embodiment, the L ^* a ^* b ^* color signal is given to obtain the color material amounts of the C, M, and Y colors and the metallic color S. However, the present invention is not limited to this example. This is not as described in the first embodiment.

  The metallic amount changing unit 31 changes the metallic color amount obtained from the three-dimensional color converting unit 21. In this example, the metallic color material amount So is changed to So ′. For example, a setting for changing the amount of the color material of the metallic color may be made in accordance with a request for a metallic feeling or a metallic feeling of the color to be reproduced.

The example shown in FIG. 5 includes a color reproduction prediction unit 32 and a color material amount correction unit 33 as a configuration for correcting the color material amount of a color other than the metallic color in accordance with the change in the color material amount of the metallic color. ing. The color reproduction prediction unit 32 predicts the color to be reproduced from the amount of color material of each color including the metallic color obtained from the three-dimensional color conversion unit 21. In this example, conversion from Co, Mo, Yo, Ko, So to L ^* 'a ^* ' b ^* 'color signals is performed. For this conversion, the above-described color conversion model may be used.

The color material amount correction unit 33 uses the L ^* 'a ^* ' b ^* 'color signal obtained by the color reproduction prediction unit 32 and the color material amount So' of the metallic color changed by the metallic amount change unit 31. The color material amount of a color other than the metallic color after changing the color material amount of the metallic color is obtained. The color material amount correction unit 33 uses, for example, an inverse conversion model of the above-described color conversion model, sets the color material amount of the metallic color as So ′, and changes the color material amount of the metallic color to the color of the other color What is necessary is just to obtain | require material quantity Co ', Mo', and Yo '. Colors of other colors in the case of the color material amount So after changing to L ^* 'a ^* ' b ^* 'color signals indicating colors reproduced by Co, Mo, Yo, Ko, and So The material amounts Co ′, Mo ′, and Yo ′ are obtained, and even when the metallic color material amount is changed, the reproduced color does not change.

For example, the color reproduction prediction unit 32 and the color material amount correction unit 33 may be configured by a unit that performs calculation according to each model, may be configured by a neural network, or may be configured by a storage unit and an interpolation unit. May be. When the color reproduction prediction unit 32 is configured by the storage unit and the interpolation unit, the L ^* a ^* b ^* color signal is stored in addresses obtained from several CMYS pairs, and the number of the given CoMoYoSo. The L ^* a ^* b ^* color signal may be read out and subjected to interpolation processing to obtain the L ^* 'a ^* ' b ^* 'color signal. When the color material amount correcting unit 33 is configured by storage means and interpolation means, CMYS sets are stored in addresses obtained from several L ^* a ^* b ^* color signals, and given L ^* ′ Co'Mo'Yo'So 'may be obtained by reading several CMYS sets from the a ^* ' b ^* 'color signal and performing interpolation processing.

  Further, the color reproduction prediction unit 32 and the color material amount correction unit 33 may be configured as a single unit, and CoMoYoSo obtained from the three-dimensional color conversion unit 21 and the color material amount So ′ of the metallic color changed by the metallic amount change unit 31. And 'Co'Mo'Yo' may be output.

  FIG. 6 shows a computer program, a storage medium storing the computer program, and a computer when the functions described in the embodiments of the color processing apparatus and the color conversion apparatus of the present invention are implemented by the computer program. It is explanatory drawing of an example. In the figure, 41 is a program, 42 is a computer, 51 is a magneto-optical disk, 52 is an optical disk, 53 is a magnetic disk, 54 is a memory, 61 is a CPU, 62 is an internal memory, 63 is a reading unit, 64 is a hard disk, and 65 is An interface 66 is a communication unit.

  You may implement | achieve all or a part of function of each part demonstrated as one Embodiment of the above-mentioned color processing apparatus of this invention and each embodiment of a color conversion apparatus with the program 41 which a computer runs. In this case, the program 41 and data used by the program may be stored in a storage medium that can be read by a computer. The storage medium causes a change state of energy such as magnetism, light, electricity, etc. to the reading unit 63 provided in the hardware resource of the computer according to the description content of the program, and the signal corresponding thereto In this format, the description content of the program is transmitted to the reading unit 63. For example, a magneto-optical disk 51, an optical disk 52 (including a CD and a DVD), a magnetic disk 53, a memory 54 (including an IC card, a memory card, a flash memory, and the like). Of course, these storage media are not limited to portable types.

  The program 41 is stored in these storage media, and the program 41 is read from the computer by mounting these storage media in the reading unit 63 or the interface 65 of the computer 42, for example, and the internal memory 62 or the hard disk 64 (magnetic disk or The functions described in the embodiments of the color processing apparatus of the present invention and the embodiments of the color conversion apparatus described above are wholly or partly stored. Realized. Alternatively, the program 41 is transferred to the computer 42 via the communication path, and the computer 42 receives the program 41 by the communication unit 66 and stores it in the internal memory 62 or the hard disk 64, and the program 41 is executed by the CPU 61. Also good.

  In addition, various devices may be connected to the computer 42 via the interface 65. For example, an output device may be connected via the interface 65, and the output device may be configured to reproduce colors based on the color material amount of each color subjected to color processing or color conversion. In addition, for example, a reception unit that receives information may be connected and configured to perform settings related to a metallic feeling. Note that each component does not have to operate on one computer, and the processing may be executed by another computer depending on the processing stage. Of course, the function described as one embodiment of the color processing apparatus of the present invention and the function described as each embodiment of the color conversion apparatus of the present invention may be processed by different computers, or integrated. It goes without saying that it may be executed.

  Moreover, when applying to another use, you may comprise as a unit with the program in the use. Furthermore, it may be partially configured by hardware, or all may be configured by hardware. For example, when each unit described in each embodiment of the color conversion apparatus of the present invention is configured by a storage unit and an interpolation unit, it may be configured as hardware.

  DESCRIPTION OF SYMBOLS 11 ... Maximum metallic amount determination part, 12 ... Metallic amount setting part, 13 ... Metallic amount adjustment part, 14 ... Color material amount determination part, 15 ... Image recording signal output part, 21 ... Three-dimensional color conversion part, 22 ... One-dimensional Color conversion unit 31 ... Metallic amount change unit 32 ... Color reproduction prediction unit 33 ... Color material amount correction unit 41 ... Program 42 ... Computer 51 ... Magnetic optical disk 52 ... Optical disk 53 ... Magnetic disk 54 ... Memory, 61 ... CPU, 62 ... Internal memory, 63 ... Reading unit, 64 ... Hard disk, 65 ... Interface, 66 ... Communication unit.

Claims (8)

  Maximum amount determining means for determining the maximum value of the color material amount of the metallic color when reproducing the color of the color signal from the given color signal; and the higher the saturation of the color signal, the more apparent the metallic color An adjusting unit for adjusting a color material amount of the metallic color within a range equal to or less than a maximum value determined by the maximum amount determining unit with respect to a change in color; and the color signal and the metallic color adjusted by the adjusting unit. A color processing apparatus comprising color material amount determining means for determining a color material amount other than a metallic color from a color material amount.   The color processing apparatus according to claim 1, wherein the adjustment unit performs adjustment to reduce the amount of the color material of the metallic color as the lightness is lower for a color having a predetermined lightness or less.   3. The color processing apparatus according to claim 1, wherein the adjustment unit performs an adjustment to reduce the amount of the color material of the metallic color as the lightness is higher for a color having a predetermined lightness or more.   4. The color processing apparatus according to claim 1, wherein the adjustment unit further performs an adjustment to reduce the amount of the color material of the metallic color according to a setting for the metallic feeling. 5.   A pair of a plurality of color signals and a color material amount including a metallic color obtained by the color processing device according to any one of claims 1 to 4 is given for each of the color signals. A color conversion apparatus comprising: conversion means for converting the received color signal into a plurality of color material amounts including metallic colors.   Furthermore, it has a change means for changing the color material amount of the metallic color, and a correction means for correcting the color material amount other than the metallic color based on the color material amount of the metallic color changed by the change means. The color conversion device according to claim 5.   A color processing program for causing a computer to execute the function of the color processing apparatus according to any one of claims 1 to 4.   A color conversion program for causing a computer to execute the function of the color conversion device according to claim 5 or 6.

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