JP2005159880A - Image processing method, image input control method, and apparatus for them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image input apparatus for receiving a color image that discriminates properness of an input color gamut designated by a user on the basis of an input image and urges the user to re-designate the color gamut as required so as to properly set a color signal used at the image input. <P>SOLUTION: An image processing section 107 of an image processing apparatus 1 processes an input image on the basis of a color gamut selected among a plurality of color gamuts prepared in advance. An input color gamut selection section 103 selects one of a plurality of the color gamuts on the basis of the color gamut of the input image. A user designates a desired color gamut among a plurality of the color gamuts by using an input color gamut designation section 108. A color gamut comparison 105 compares the color gamut selected by the input color gamut selection section 103 with the color gamut designated by the input color gamut designation section 108, and an input color gamut setting section 104 sets the color gamut to the image processing section 107 when both the color gamuts are coincident, allows a UI section to urge the user to re-designate the color gamut when both the color gamuts are dissident, and sets the color gamut decided in response to the re-designation operation to the image processing section 107. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a technique for processing image data obtained by a color image input device such as a color scanner or a reader unit of a color copying machine.

  With the spread of personal computers in recent years, an image is input using an image input device such as a digital camera or a color scanner, and the image is displayed using an image display device such as a CRT or LCD. On the other hand, editing, processing, correction, and the like are generally performed according to applications and output by an image output device such as a color printer.

  As described above, when an image is input by an image input device such as a color scanner, a color signal (for example, sRGB) for inputting the image is set, that is, a color gamut is set. For example, depending on the purpose, such as whether to input an image for output by a color printer or to input an image for display and editing on a monitor, the color signal used for input is specified for each purpose and scanned. It was. That is, it is not determined whether the color signal specified by the user is optimal for the image to be scanned, and the scanning operation or the processing of the scanned image is executed by the specified color signal.

  Japanese Patent Application Laid-Open Publication No. 2004-151867 discloses a technique for warning a user when an input image from a scanner or the like is analyzed and determined to be inappropriate for scanning. This technique determines the front and back of a document based on the number of black data in the image, and warns the user when it is determined that the document is back.

  In addition, as described above, when inputting an image with an image input device such as a color scanner, there is a type that can set an image input purpose of how to use the input image. For example, you can set whether the output destination is a printer or a file on the scanner driver, such as whether to input an image for output by a color printer, or to input an image for display and editing on a monitor. Scanning was performed while changing the input conditions such as reading resolution.

For example, as described in Japanese Patent Application Laid-Open No. 2004-228688, there is a technique for performing density correction suitable for an output destination printer as a technique for switching scanner processing in accordance with an image input purpose.
JP 2002-094730 A JP2001-078031

  In the above conventional example, an image is input so as to be a user-specified color signal (for example, sRGB color space). Since the image is input with a user-specified color signal (sRGB color signal), the input color gamut is limited to the user-specified color gamut (sRGB color gamut). That is, when the color gamut of the input target image is a color exceeding the color gamut (sRGB color gamut) specified by the user, such as a positive film or a high saturation color, there is a problem that color collapse occurs. In addition, when the color gamut of the input target image is a color that is much lower in saturation than the color gamut specified by the user (sRGB color gamut), such as a low chroma color, there is a problem that the color gradation is insufficient. There was also. On the other hand, Patent Document 1 described above only determines the front and back of the document, and does not analyze the color gamut of the input image and control the input color signal.

  In the above conventional example, images are input so as to have the same color signal (for example, sRGB color space) regardless of the input purpose. Since image input is performed using color signals set by the scanner (for example, sRGB color signals), the color gamut that can be input is limited to the color gamut set by the scanner (for example, sRGB color gamut). In other words, if the color gamut of the input target image exceeds the color gamut set by the scanner (sRGB color gamut), such as positive film or high-saturation color, accurate input such as color collapse may not be possible. There was a problem. On the other hand, Patent Document 2 described above only performs density correction suitable for an output destination printer, and does not control color signals when input by a scanner.

  The present invention has been made to solve the above-described problem, and in inputting a color image, when inputting a high saturation color or a low saturation color as described above, an accurate image input can be performed. An object of the present invention is to easily set a color signal suitable for the color gamut of an input image.

  Another object of the present invention is to allow a color gamut of an input image to be set according to the output destination of the image when inputting a color image, and to easily generate a color signal suitable for the color gamut of the image on the output side. It is to be settable.

In order to achieve the above object, an image processing method according to the present invention comprises:
An image processing method for processing an input image based on a color gamut selected from a plurality of color gamuts prepared in advance,
A calculation step of calculating a color gamut of the input image;
A selection step of selecting one of the plurality of color gamuts based on the color gamut of the input image calculated in the calculation step;
A processing step of processing the input image based on the color gamut selected in the selection step.

An image input control method according to another aspect of the present invention for achieving the above-described object is as follows:
An image input control method for inputting an image using a color filter selected from a plurality of color filters prepared in advance,
A calculation step of reading an image using a color filter having the maximum color gamut and calculating the color gamut of the obtained image;
A selection step of selecting one of a plurality of color filters prepared in advance based on the color gamut calculated in the calculation step;
And a reading step of reading an image using the color filter selected in the selection step.

Furthermore, an image processing method according to another aspect of the present invention for achieving the above object is provided:
An image processing method for processing an input image based on a color gamut selected from a plurality of color gamuts prepared in advance,
An input process for inputting information about the output destination of the input image;
A selection step of selecting one of the plurality of color gamuts as a color gamut of an input image based on the information about the output destination;
A processing step of processing the input image based on the color gamut selected in the selection step.

  According to the above configuration, when inputting a color image, it becomes possible to easily set a color signal suitable for the color gamut of the input image, and when inputting an image of a high saturation color or a low saturation color. Will be able to input accurate images.

  In addition, according to the above configuration, it is possible to easily set a color signal suitable for the color gamut of the output-side image when inputting a color image.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

<First Embodiment>
FIG. 30 is a diagram showing a configuration of the image processing system in the first embodiment. In FIG. 30, 10 is a scanner device to which a computer device 20 such as a personal computer and a printer 30 are connected. The scanner device 10 includes an image processing device 1 and a user interface (UI) 12. The optical device 11 includes a light receiving element such as a CCD for capturing an input original as image data, an optical component such as a lens, an A / D converter for digitizing image data, and the like. The UI 12 may be composed of, for example, a liquid crystal panel and a touch panel.

  FIG. 1 is a block diagram showing a hardware configuration of the image processing apparatus according to the first embodiment of the present application. In FIG. 1, reference numeral 1 denotes an image processing apparatus. An optical control unit 101 controls the optical device 11 and acquires digital image data. An image color gamut determining unit 102 determines the color gamut of the input image. An input color gamut selecting unit 103 selects an input color gamut suitable for the input image from the color gamut of the input image determined by the image color gamut determining unit 102. An input color gamut setting unit 104 sets the input color gamut selected by the color gamut comparison unit 105 in the image processing unit 107. Reference numeral 105 denotes a color gamut comparison unit that compares the input color gamut designated by the input color gamut designation unit 108 with the input color gamut selected by the input color gamut selection unit 103.

  An IF unit 106 is an interface that connects an external device such as the PC 20 or the printer 30 and the image processing apparatus 1. An image processing unit 107 performs image processing on an image input based on the input color gamut set by the input color gamut setting unit 104. Reference numeral 108 denotes an input color gamut designating unit, which writes the input color gamut designated by the user into the buffer memory 110. Reference numeral 109 denotes a UI unit that includes a UI 12 and provides a user interface for the user to input resolution and an input color gamut. A buffer memory 110 temporarily stores data input in the UI unit 109. Reference numeral 111 denotes a correspondence table holding unit which holds a parameter correspondence table (FIG. 11) describing color conversion parameters corresponding to each input color gamut. The parameter correspondence table is used when the input color gamut selection unit 103 selects a color gamut.

  In the present embodiment, the image processing apparatus 1 is provided in the scanner apparatus 10, but may be provided in the computer apparatus 20. In this case, the user interface is provided by the display 21, the keyboard 22, and the mouse 23. Even when the image processing apparatus 1 is provided in the scanner apparatus 10, a user interface using the display 21, the keyboard 22, and the mouse 23 is provided in cooperation with the UI unit 109 and the computer apparatus 20. Also good. A configuration of a copying machine in which the scanner 10 and the printer 30 are integrated may be employed.

<Operation in Image Processing Apparatus 1>
FIG. 2 is a flowchart illustrating an example of the color gamut designation process executed by the image processing apparatus 1.

  First, in step S <b> 1, the input color gamut specifying unit 108 sets the input color gamut C <b> 1 specified by the user using the UI unit 109. A specific processing flow of the input color gamut specifying unit 108 will be described later. In step S <b> 2, the optical control unit 101 reads a document placed on a document table (not shown) at a resolution specified by the user using the UI unit 109.

  A display example of the user interface by the UI unit 109 is shown in FIG. In FIG. 4, reference numeral 1091 denotes a resolution designation unit, which designates the resolution for inputting an image. A color / monochrome switching unit 1092 is used by the user to instruct color / monochrome switching. Reference numeral 1093 denotes an input color gamut specifying unit, which is used by the user to specify a color gamut to be input. In this example, three types of color gamuts (input color gamuts 1 to 3) are prepared, and one of these is designated, and this is set as the input color gamut C1. Needless to say, the number of color gamuts to be prepared is not limited to three. Reference numeral 1094 denotes an OK button for notifying that input has been completed. In step S <b> 2, the optical control unit 101 acquires the resolution specified by the user in the resolution specifying unit 1091 of the UI unit 109, and reads the document with the resolution. At this time, the size of the read document, that is, the number of rows and columns of the image is temporarily stored in the buffer memory 110.

  Next, in step S3, the image color gamut determination unit 102 calculates the color gamut of the input document. A specific calculation method will be described later. In step S4, the input color gamut selecting unit 103 uses the input color gamut prepared in advance based on the color gamut of the document calculated in step S3 (as described above in FIG. One of the color gamuts) is selected, and this is set as the input color gamut C2. The selection method will be described later. In step S5, the color gamut comparison unit 105 compares the input color gamut C1 designated by the user in step S1 with the input color gamut C2 selected based on the color gamut of the document in step S4. If both color gamuts are equal, that is, if C1 = C2, the process proceeds to step S10. If C1 ≠ C2, the process proceeds to step S6.

  In step S6, the user is warned that the input color gamut C1 designated by the user in step S1 is different from the input color gamut C2 determined to be optimal for the image in step S4. For example, when C1 is smaller than C2, as shown in FIG. 9A, a warning is given that the designated input color gamut is narrow, and a message recommending the input color gamut C2 determined from the color gamut of the document is displayed. To do. On the other hand, when C1 is larger than C2, as shown in FIG. 9B, a warning is given that the designated input color gamut is too wide, and the recommended input color gamut is displayed as in FIG.

  In step S7, it is determined whether or not the warning UI reset button 1096 shown in FIG. 9 has been pressed. If it is determined that the reset button 1096 has been pressed by the user, the process returns to step S1. If the reset button 1096 has not been pressed, the process proceeds to step S8. In step S8, it is determined whether or not the warning UI ignore button 1097 shown in FIG. 9 has been pressed. If it is determined that the ignore button 1097 has been pressed by the user, the process proceeds to step S10. If not, the process proceeds to step S9. In step S9, it is determined whether or not the warning UI OK button 1095 shown in FIG. 9 has been pressed. If the user presses the OK button 1095, the process proceeds to step S11. If not, the process returns to step S6.

  If the input color gamut C1 and the input color gamut C2 match, or if they do not match but an instruction is given to ignore the warning (if the ignore button 1097 is pressed), the process proceeds to step S10. Decide to use C1 as the input color gamut. That is, in step S10, the input color gamut setting unit 104 writes the input color gamut C1 designated by the user as the input color gamut C in the buffer memory 110. On the other hand, if the input color gamut C1 and the input color gamut C2 do not match and the UI OK button 1095 displayed in step S6 is pressed, the recommended input color gamut, that is, the input color gamut C2 is used in step S11. It is decided. That is, in step S11, the input color gamut setting unit 104 writes the input color gamut C2 suitable for the color gamut of the document as the input color gamut C in the buffer memory 110.

  Next, in step S <b> 12, the input color gamut setting unit 104 sets color conversion parameters corresponding to the input color gamut C held in the buffer memory 110 in the image processing unit 107. The correspondence table holding unit 111 holds color conversion parameters created in advance corresponding to each input color gamut as shown in FIG. Color conversion parameters corresponding to the input color gamut C are set according to the parameter correspondence table.

  In step S13, the image processing unit 107 converts the color of the image data of the document read in step S2 using the color conversion parameter set in step S12. Specific processing of the image processing unit 107 will be described later. In step S14, the IF unit 106 outputs the image data processed by the image processing unit 107 to a PC or a printer.

<Operation in Input Color Gamut Specification Unit 108>
The input color gamut specification in step S1 will be described in detail. FIG. 3 is a flowchart showing a processing flow of the input color gamut specifying unit 108. First, in step S20, the UI unit 109 presents a user interface as shown in FIG. The user interface may be realized using the UI 12, or may be realized using the display 21 or the input devices 22 and 23 of the computer device 20. In step S <b> 21, the input color gamut specifying unit 108 determines whether the OK button 1094 of the user interface presented by the UI unit 109 has been pressed. If the OK button 1094 is not pressed, the user input is awaited. If the user presses the OK button 1094, the process proceeds to step S22. In step S22, the input color gamut specification unit 108 writes the input color gamut input by the user as the input color gamut C1 in the buffer memory 110, and ends the process.

<Operation in Image Color Gamut Determination Unit 102>
Next, the image color gamut determination in step S3 will be described in detail. FIG. 5 is a flowchart for explaining image color gamut determination processing by the image color gamut determination unit 102.

  In step S31, the image color gamut determining unit 102 sets 0 to pixel numbers i and j. i and j correspond to the row and column of the image, respectively. The number of rows and the number of columns of the image are stored in the buffer memory 110 when the original is read using the optical device 11 under the control of the optical control unit 101. ing. In this description, the number of rows of images stored in the buffer memory 110 is N, and the number of columns is M.

  Next, in step S32, the image color gamut determination unit 102 converts the pixel having pixel numbers i and j in the image data read in step S31 into a CIE tristimulus value XYZ. The image data read in step S21 is captured in an input color gamut (hereinafter referred to as a scanner color gamut) formed by an RGB color filter equipped in the optical device 11. The scanner color gamut has the widest color gamut (in this example, the input color gamut) of the input color gamuts (in this example, the input color gamuts 1 to 6) held by the correspondence table holding unit 111. 3)). A relational expression (a matrix of 3 rows and 3 columns) between the scanner color gamut and the XYZ values is previously stored in the image color gamut determination unit 102 in a format as shown in FIG. Then, this conversion matrix is read, and the pixels with pixel numbers i and j are converted into XYZ values as shown in Expression (1).

  In the correspondence table of the correspondence table holding unit 111, color conversion parameters and color system conversion parameters are registered for each input color gamut as shown in FIG.

  In step S <b> 33, the image color gamut determination unit 102 determines whether i is equal to N stored in the buffer memory 110 (i = N). If i = N, the process proceeds to step S34. On the other hand, if i ≠ N, the process proceeds to step S35, i is incremented, and the process returns to step S32. In step S <b> 34, the image color gamut determining unit 102 determines whether j = M with respect to M stored in the buffer memory 110. If j = M, it is determined that all the pixels of the input image have been converted to XYZ, and the process ends. If j ≠ M, j is incremented in step S36, i = 0 is set, and the process returns to step S32.

<Color Gamut Selection Method in Input Color Gamut Selection Unit 103>
Next, the input color gamut selection process in step S4 will be described in detail with reference to FIG. 6, FIG. 8, and FIG.

  FIG. 6 is a flowchart for explaining processing of the color gamut selection method in the input color gamut selection unit 103. In step S <b> 41, the input color gamut selection unit 103 reads the XYZ values of the input image calculated by the image color gamut determination unit 102. In step S <b> 42, the input color gamut selection unit 103 acquires the number of color gamuts from the correspondence table holding unit 111. The correspondence table holding unit 111 holds a correspondence table of color gamuts and parameters and the number of held color gamuts in the format shown in FIG. From this, the number of color gamuts is obtained and set to a parameter P representing the number of color gamuts. In the example of FIG. 11, P = 3. In step S43, the input color gamut selecting unit 103 sets 1 to the color space number k.

  In step S44, the input color gamut selection unit 103 selects the kth input color gamut. The input color gamut is held in the correspondence table holding unit 111 in the format shown in FIG. 11 as described above, and is numbered in ascending order of the color gamut as shown in FIG. . Next, in step S45, the input color gamut selecting unit 103 uses the XYZ value of each pixel of the input image read in step S41, so that the color gamut of the input image is included in the input color gamut selected in step S44. It is determined whether or not everything is contained. This determination method will be described later.

  In step S46, referring to the result of the color gamut inside / outside determination in step S45, if all the output color gamuts are within the kth input color gamut, go to step S47, and if not, go to step S48. move on. In step S47, the input color gamut selecting unit 103 selects an input color gamut optimal for the output destination as the kth input color gamut. On the other hand, if the output color gamut does not fall within the kth input color gamut in step S46, k is the same as the number P of input color gamuts held in the correspondence table holding unit 111 in step S48. It is determined whether or not. As described above, the input color gamuts are numbered in ascending order of color gamut size. Therefore, the Pth input color gamut is an input color gamut having the maximum color gamut among the input color gamuts held by the input color gamut selection unit 103. Therefore, if k = P, that is, if the output destination color gamut does not fit in the Pth input color gamut, the process proceeds to step S47, and the Pth input color gamut is set as the optimum input color gamut. On the other hand, if k <P, k is incremented and the process returns to step S34. As described above, since the color gamut is processed in ascending order, if the color gamut is determined in step S47 after the YES branch of step S46, the determined color gamut includes the color gamut of the input image. The area has been selected.

<Color Gamut Inside / Outside Determination Method>
The color gamut inside / outside determination in step S45 will be described in detail. FIG. 7 is a flowchart showing the color gamut inside / outside determination process.

  In step S51, the CIE tristimulus value XYZ value of each pixel of the input image is converted into an RGB value of the input color gamut. A color system conversion parameter corresponding to each input color gamut is acquired from the parameter correspondence table shown in FIG. 11, and conversion is performed using the color system conversion parameter. For example, when the inside / outside determination of the input color gamut 1 is performed, conversion is performed as in Expression (2).

  In step S52, if at least one of the R value, the G value, and the B value is smaller than 0 as a result of the calculation by the expression (2), the process proceeds to step S59, and it is determined that the input color gamut is out and this process is terminated ( Steps S52, S53, S54). If at least one of the R value, the G value, and the B value is greater than 1, the process proceeds to step S59, where it is determined that the input color gamut is not reached, and the present process ends (steps S55, S56, S57). On the other hand, if all of the R value, G value, and B value are in the range greater than 0 and less than 1, the process proceeds to step S48, where it is determined that the input color gamut is within the range, and this process ends.

<Processing in Image Processing Unit 107>
The image processing in step S13 will be described in detail. FIG. 10 is a flowchart showing processing by the image processing unit 107.

In step S <b> 61, the image processing unit 107 performs white reference setting for the image data acquired by the optical control unit 101. The white reference setting is such that, for example, the R, G, B values of the color chart that is a white reference installed in the image processing apparatus 1 are R = 255, G = 255, and B = 255 (when 8 bits are output). By multiplying each R, G, B value by a correction coefficient. Assuming that the R, G, B values of the color chart serving as the white reference read by the optical control unit 101 are R _w , G _w , B _w , respectively, for example, white reference correction using the following equation (3) Coefficients T _R , T _G , and T _B are calculated.

  Then, all pixels of the image data are converted using the obtained white reference correction coefficient (Equation (4)).

  In step S62, the image processing unit 107 performs gradation conversion processing. The gradation conversion process is performed to absorb the color reproduction characteristics of the CCD and filter of the image processing apparatus 1. For example, a gradation conversion coefficient γ is determined in advance, and conversion is performed using the following equation (5).

  In step S <b> 63, the image processing unit 107 converts the input value using the color processing parameter set by the input color gamut setting unit 104. For example, when the input color gamut 1 is selected by the processing described above and the color conversion parameters of the matrix of 3 rows and 3 columns shown in FIG. 11 are set, the conversion is performed using the following equation (6).

  As described above, according to the first embodiment, when a user inputs a document with the image processing apparatus 1, the color gamut of the document is automatically determined, and the color gamut is the input color designated by the user. When the range is exceeded, or when the input color gamut specified by the user is too small, a warning to that effect can be given. Furthermore, the image input apparatus 1 notifies the user of the input color gamut optimal for the color gamut of the document as the recommended input color gamut. The manuscript can be input. It is obvious that an automatic color gamut setting mode may be provided in which the setting of the input color gamut by the user is omitted and the recommended input color gamut determined from the color gamut of the document is automatically set.

Second Embodiment
Next, a second embodiment will be described. FIG. 12 is a block diagram illustrating a hardware configuration of the image processing apparatus according to the second embodiment.

  In FIG. 12, reference numeral 2 denotes an image processing apparatus. In addition, the same reference numerals are assigned to the same components as those in the first embodiment (FIG. 1). An optical control unit 201 has substantially the same configuration as the optical control unit 101 of the first embodiment. However, the optical device 11 of the second embodiment includes a plurality of color filters, and the optical control unit 201 causes the optical device 11 to set the color filter selected by the color filter selection unit 207 when reading the document. An input color gamut setting unit 204 sets the input color gamut selected by the color gamut comparison unit 105 in the color filter selection unit 207. A color filter selection unit 207 selects a color filter based on the input color gamut set by the input color gamut setting unit 204.

<Operation in Image Processing Device 2>
FIG. 13 is a flowchart illustrating an example of processing executed by the image processing apparatus 2.

  In step S71, the input color gamut specifying unit 108 sets the input color gamut C1 specified by the user. Since the setting method is the same as step S1 in the first embodiment, the description thereof is omitted. In step S <b> 72, the color filter selection unit 207 sets a color filter having the widest color gamut among the held color filters in the optical control unit 201. In step S73, the optical control unit 201 pre-scans a document placed on a document table (not shown) using the color filter set in step S72. In step S74, the image color gamut determining unit 102 calculates the color gamut of the input document. Since the calculation method is the same as step S3 in the first embodiment, a detailed description thereof is omitted. In step S75, the input color gamut selecting unit 103 selects the input color gamut C2 based on the color gamut of the document determined in step S64. The input color gamut selection method is the same as that in step S4 in the first embodiment. However, the correspondence table (correspondence table holding unit 211) referred to in this step is, as shown in FIG. 15, the color filter corresponding to the input color gamut, the color system conversion parameters, and the number of input color gamuts. Is described.

  In step S76, the color gamut comparison unit 105 compares the input color gamut C1 set in step S1 with the input color gamut C2 selected based on the color gamut of the document in step S65. If C1 = C2, the process proceeds to step S81. If C1 ≠ C2, the process proceeds to step S77.

  In step S77, a warning is given that the input color gamut C1 designated by the user is different from the input color gamut C2 determined to be optimal for the image. For example, when C1 is smaller than C2, as shown in FIG. 9A, a warning is given that the designated input color gamut is narrow, and a message recommending the input color gamut C2 determined from the color gamut of the document is displayed. . On the other hand, when C1 is larger than C2, as shown in FIG. 9B, a warning is given that the designated input color gamut is too wide, and the recommended input color gamut is displayed in the same manner.

  In step S78, it is determined whether or not the warning UI reset button 1096 shown in FIGS. 9A and 9B has been pressed. If the reset button 1096 is pressed by the user, the process returns to step S71. If not, the process proceeds to step S79. In step S79, it is determined whether or not the warning UI ignore button 1097 shown in FIGS. 9A and 9B has been pressed. When the ignore button 1097 is pressed by the user, the process proceeds to step S81. If not, the process proceeds to step S80. In step S80, it is determined whether the OK button 1095 of the warning UI shown in FIGS. 9A and 9B has been pressed. If the user presses the OK button 1095, the process proceeds to step S82. If not, the process returns to step S77.

  If C1 = C2 in step S76, or if C1 ≠ C2 but the warning UI ignore button 1097 is pressed, in step S81, the input color gamut setting unit 204 inputs the input designated by the user. The color gamut C 1 is set as the input color gamut C, and this is stored in the buffer memory 110. On the other hand, if C1 ≠ C2 and the OK button 1095 in the trend UI is pressed, the input color gamut setting unit 204 sets the input color gamut C2 suitable for the color gamut of the document as the input color gamut C in step S82. This is held in the buffer memory 110.

  When the input color gamut C is set as described above, the input color gamut setting unit 204 sets the input color gamut C held in the buffer memory 110 in the color filter selection unit 207 in step S83. In step S84, the color filter selection unit 207 selects a color filter corresponding to the input color gamut C set in step S82, and sets the color filter in the optical control unit 201. The processing of the color filter selection unit 207 will be described later.

  In step S85, the optical control unit 201 reads an original using the color filter set by the color filter selection unit 207 (main scan). In step S86, the image data read in step S85 is output to the PC or printer via the IF unit 106.

<Processing Flow in Color Filter Selection Unit 207>
The color filter selection in step S84 will be described in detail. FIG. 14 is a flowchart for explaining a color filter selection procedure by the color filter selection unit 207. FIG. 15 is a diagram illustrating an example of the color filter correspondence table held in the correspondence table holding unit 211. Although the correspondence table is held in the correspondence table holding unit here, the correspondence table may be held in the color filter selection unit 207. It will be apparent to those skilled in the art that these differences are not substantial.

  In step S91, the color filter selection unit 207 acquires the input color gamut C set by the input color gamut setting unit 204. In step S92, the color filter selection unit 207 determines whether data of the input color gamut C exists in the held color filter correspondence table. The color filter correspondence table is obtained by calculating the input color gamut in advance for each color filter corresponding to the input color gamut and storing it in the correspondence table holding unit 211 in the format shown in FIG. . If data of the input color gamut C exists in this color filter correspondence table, the process proceeds to step S93. If not, the process proceeds to step S94.

  In step S93, the color filter selection unit 207 selects a color filter corresponding to the input color gamut C according to the color filter correspondence table. Then, the color filter is set in the optical control unit 201, and the process ends. In step S94, if there is no data of the input color gamut C in the color filter correspondence table, the color filter corresponding to the default input color gamut, for example, if the default input color gamut is the input color gamut 1, the color filter 1 is elected. Then, this color filter is set in the optical control unit 201, and this process is terminated.

  As described above, according to the second embodiment, when the user prescans the document with the image processing apparatus 2, the color gamut of the document is automatically determined, and the color gamut is input by the user. If the color gamut has been exceeded or is smaller than the user's specified input gamut, a warning to that effect can be given, and the input color gamut that is optimal for the original color gamut is recommended. The user can be notified. The input color gamut for inputting the original can be freely changed by switching the color filter in accordance with the re-designation by the user for the warning and notification. Obviously, an automatic color filter setting mode may be provided in which the user is not required to set the color filter and the recommended color filter determined from the color gamut of the document is automatically set.

<Third Embodiment>
FIG. 17 is a block diagram showing a hardware configuration according to the third embodiment. In FIG. 17, configurations having the same functions as those in the first embodiment are denoted by the same reference numerals.

  Reference numeral 302 denotes an input purpose setting unit in which an image input purpose is set by the user. Reference numeral 303 denotes an input color gamut selection unit that selects an input color gamut from the input purposes set in the input purpose setting unit 302. An input color gamut setting unit 304 sets the input color gamut selected by the input color gamut selection unit 303 in the image processing unit 106. Reference numeral 309 denotes a UI unit that provides a user interface described later with reference to FIG.

<Operation in Image Processing Device 3>
FIG. 18 is a flowchart illustrating an example of processing executed by the image processing apparatus 3. First, in step S101, the input purpose and input conditions specified by the user in the input purpose setting unit 302 are set. A specific processing flow of the input purpose setting unit 302 will be described later. Next, in step S102, the input color gamut selection unit 303 selects the input color gamut based on the input conditions set in step S101. A selection method for selecting the input color gamut from the input conditions will be described later.

  In step S103, the input color gamut setting unit 304 sets color conversion parameters corresponding to the input color gamut selected in step S102 in the image processing unit 106. Specific processing of the input color gamut setting unit 304 will be described later.

  In step S <b> 104, the optical control unit 101 reads a document placed on a document table (not shown) at the resolution input by the user in the UI unit 309. In step S105, the image processing unit 107 converts the color of the image data of the document read in step S104 using the color conversion parameter set in step S103. Specific processing of the image processing unit 107 will be described later. In step S106, the IF unit 106 outputs the image data processed by the image processing unit 107 to a PC or a printer.

<Operation of Input Purpose Setting Unit 302>
The input purpose and input condition setting in step S101 will be described in detail with reference to FIGS. FIG. 19 is a flowchart showing a processing flow of the input purpose setting unit 302. FIG. 20 shows an example of a user interface that is provided by the UI unit 309 for specifying an image input condition, a purpose, and the like when the user instructs reading (scanning) of an image.

  In the flowchart shown in FIG. 19, first, a user interface as shown in FIG. 2 is presented in step S120.

  In FIG. 20, reference numeral 3091 denotes a resolution designation unit, which designates the resolution at the time of image input. A color / monochrome switching unit 3092 performs color / monochrome switching at the time of image reading. Reference numerals 3093, 3096, and 3099 denote device designation units for designating output destination devices. In this embodiment, any one of an inkjet printer, a laser printer, and a monitor can be selected as an image output destination.

  When the output destination device is a printer, model designation units 3094 and 3097 for designating the printer name (model name) and media designation units 3095 and 3098 for designating the output media name are presented. Output media can be specified. Reference numeral 3100 denotes an OK button for notifying that the input by the user interface has been completed.

  In step S121, the input purpose setting unit 302 first determines whether or not the OK button 3100 of the UI unit 309 has been pressed. If the OK button 3100 is not pressed, the user input is awaited. If the OK button 3100 is pressed by the user, the process proceeds to step S122. In step S122, the input purpose setting unit 302 writes the type of the output destination device designated by the device by the device designation unit (3093, 3096, 3099) in the buffer memory 110. In step S123, the input purpose setting unit 302 determines whether the type of the output destination device designated by the user is a monitor. If it is a monitor, the process is terminated as it is, and if it is not a monitor, the process proceeds to step S124.

  If the output device is a printer, the input purpose setting unit 302 writes the model name of the output destination printer designated by the model designation unit (3094, 3097) in the buffer memory 110 in step S124. Further, in step S125, the input purpose setting unit 302 writes the output destination media designated by the media designation units 3095 and 3098 in the buffer memory 110.

<Color Gamut Selection Method in Input Color Gamut Selection Unit 303>
Next, the input color gamut selection in step S102 will be described in detail with reference to FIG. 21, FIG. 22, and FIG.

  FIG. 21 is a flowchart for explaining a color gamut selection method by the input color gamut selection unit 303. First, in step S131, the input color gamut selection unit 303 acquires the type of the output destination device from the buffer memory 110. In step S132, the input color gamut selection unit 303 determines whether the type of the output destination device acquired from the buffer memory 110 is a monitor. If it is determined to be a monitor, the process proceeds to step S135. If not, the process proceeds to step S133.

  In step S <b> 133, the input color gamut selection unit 303 acquires the model name of the output destination printer from the buffer memory 110. In step S <b> 134, the input color gamut selection unit 103 acquires the media name output from the output destination printer from the buffer memory 110. In step S135, the input color gamut selecting unit holds data corresponding to the output destination device, the model name of the output destination device, and the output media name acquired in step S132, step S133, and step S134 in the correspondence table holding unit 111. It is determined whether it is described in the color gamut correspondence table.

  FIG. 22 is a diagram showing an example of the color gamut correspondence table. The correspondence table of FIG. 22 is obtained by calculating the output color gamut determined by the combination of each device, model, and media, and determining the input color gamut optimal for that color gamut in advance. The color gamut will be further described with reference to FIG.

  In FIG. 8, the hatched area indicates the color gamut when inkjet printer 1 outputs to the coated paper (hereinafter referred to as inkjet 1 / coated paper) at the CIExy coordinates. Input color gamuts 1 to 3 show the color input gamuts. As can be seen from FIG. 8, in the input color gamut 1, the entire color gamut of the inkjet 1 / coated paper cannot be reproduced. On the other hand, the input color gamut 3 completely includes the color gamut of inkjet 1 / coated paper, but the color gamut is so wide that errors due to quantization increase or the number of bits increases. Increase the image size. For this reason, the input color gamut corresponding to the inkjet 1 / coated paper preferably includes the color gamut of the inkjet 1 / coated paper and is not too wide, that is, the input color gamut 2. In this way, the optimum input color gamut for each device, model, and media combination is described in advance in the color gamut correspondence table as shown in FIG.

  Returning to FIG. 21, if there is data corresponding to the acquired output destination device, the type of output destination device, and the output medium in the color gamut correspondence table, the process goes to step S136, and if there is no data, the process goes to step S137. Proceed with each. In step S <b> 136, the input color gamut selection unit 303 applies the previously acquired output destination information to the color gamut correspondence table, selects the corresponding input color gamut, and sets it as the input color gamut of the image processing apparatus 3. On the other hand, in step S137, when it is determined in step S135 that there is no data in the color gamut correspondence table, the default input color gamut, for example, the input color gamut 1, is determined as the input color gamut of the image processing apparatus 1.

<Processing in Input Color Gamut Setting Unit 304>
The input color gamut setting in step S103 will be described in detail with reference to FIGS. FIG. 23 is a flowchart showing a processing flow of the input color gamut setting unit 34. In step S <b> 141, the input color gamut setting unit 304 acquires the input color gamut selected by the input color gamut selection unit 303. In step S142, the input color gamut setting unit 304 acquires a color conversion parameter corresponding to the acquired input color gamut. The color conversion parameters are created in advance for each input color gamut, and are held in the correspondence table holding unit 111 as a correspondence table between each input color gamut and color conversion parameter parameters as shown in FIG. Then, according to this parameter correspondence table, a color conversion parameter corresponding to the input color gamut is acquired. In step S143, the input color gamut setting unit 304 sets the color conversion parameter acquired in step S142 in the image processing unit 107.

  The image processing unit 107 processes the input image data according to the set color conversion parameter, and the procedure is as described above in the first embodiment (FIG. 10).

  As described above, according to the third embodiment, the user can automatically select an input color gamut optimum for the purpose by designating the input purpose of the document to the image processing apparatus 3 using the UI. . Then, by inputting an original in an input color gamut according to the purpose, it is possible to prevent color collapse and reduce errors due to quantization.

<Fourth embodiment>
In the third embodiment, an input color area assigned in advance is set according to the output condition (output destination model or medium). On the other hand, in the fourth embodiment, the color gamut of the output image is calculated based on the profile information of the output destination, and the input color gamut is determined based on this. FIG. 25 is a block diagram illustrating a hardware configuration of the image processing apparatus 4 according to the fourth embodiment. In FIG. 25, the same reference numerals are given to the same components as those in the third embodiment.

  Reference numeral 402 denotes an input purpose setting unit that sets an input purpose based on an output profile. An input color gamut is selected from an input purpose set in the input purpose setting unit 402. Reference numeral 409 denotes a UI unit that presents a user interface as shown in FIG. A profile holding unit 412 holds an output destination profile.

<Operation in Image Processing Device 4>
FIG. 26 is a flowchart illustrating an example of processing executed by the image processing apparatus 4. FIG. 27 is a diagram showing an example of a user interface for receiving input from the user, presented by the UI unit 409.

  In FIG. 27, reference numeral 4091 denotes a resolution designation unit, which designates the resolution for image input. Reference numeral 4092 denotes a color / monochrome switching unit, which designates color / monochrome switching at the time of image input. Reference numeral 4093 denotes an output profile input unit for designating a profile in which the color reproduction characteristics of the output destination are described. Reference numeral 4094 denotes an OK button for notifying that the input by the user interface has been completed.

  The operation of the image processing apparatus 4 according to the fourth embodiment will be described below according to the flowchart shown in FIG.

  In step S161, the input purpose setting unit 402 presents a user interface as shown in FIG. 27 and sets a profile in which the color reproduction characteristics of the output destination are described. The user specifies a desired output destination profile from the profiles held in the profile holding unit 412 in the output profile input unit 4093 in the user interface presented by the UI unit 409. When an OK button 4094 is pressed by the user, the input purpose setting unit 402 reads the output destination profile designated by the user and writes it in the buffer memory 110. In step S162, the input color gamut selection unit 403 reads the profile written in the buffer memory 110 in step S161, and selects the input color gamut. This sorting method will be described later.

  In step S163, the input color gamut setting unit 304 sets color conversion parameters corresponding to the input color gamut selected in step S162 in the image processing unit 107. Since the operation of the input color gamut setting unit 304 is the same as that of the third embodiment, detailed description thereof is omitted. In step S164, the optical control unit 101 reads a document placed on a document table (not shown) with the resolution input by the user in the UI unit 409. In step S165, the image processing unit 107 converts the color of the document image data read in step S164 using the color conversion parameter set in step S163. Since this conversion method is the same as that of the first embodiment, detailed description thereof is omitted. In step S166, the IF unit 106 outputs the image data processed by the image processing unit 107 to a PC or a printer.

<Operation in Input Color Gamut Selection Unit 403>
The input color gamut selection in step S162 described above will be described in detail with reference to FIGS. 28, 29, and 11. FIG.

  FIG. 28 is a flowchart showing the processing of the input color gamut selection unit 403 according to the fourth embodiment. In step S <b> 171, the input color gamut selection unit 403 reads an output destination profile from the buffer memory 110. In step S <b> 172, the input color gamut selection unit 403 acquires the number of color gamuts from the correspondence table holding unit 111. As described in the first embodiment, the correspondence table holding unit 111 holds a correspondence table of color gamuts and parameters and the number of held color gamuts in the format shown in FIG. Yes. In step S172, the number of color gamuts is acquired from this, and set to a parameter N representing the number of color gamuts. In the example of FIG. 11, N = 3. In step S173, the input color gamut selection unit 403 sets 1 to the color space number i.

  In step S174, the input color gamut selection unit 403 selects the i-th input color gamut. The input color gamut is held in the correspondence table holding unit 111 in the format shown in FIG. 11 as described above, and is numbered in ascending order of the color gamut as shown in FIG. . In step S175, the input color gamut selection unit 403 acquires the color gamut from the output destination profile read in step S171. The output profile is described in a format as shown in FIG. 29, for example, and information on the output color gamut is stored in a three-dimensional Look Up Table format together with header and tag information. Then, it is determined whether or not all the XYZ values described in the Look Up Table are included in the input color gamut selected in step S174.

  This determination method is as described above with reference to FIG. That is, the XYZ value acquired from the output profile is converted to the RGB value of the i-th input color gamut, and if any of the RGB values falls outside the range of 1 to 0, it is determined that it is out of the color gamut. . Further, if all of the RGB values are in the range of 1 to 0, it is determined to be within the color gamut.

  In step S176, the result of the color gamut inside / outside determination in step S175 is referred to, and if all the output destination color gamuts are within the i-th input color gamut, the process proceeds to step S177, and if not, the process proceeds to step S178. move on. In step S177, the input color gamut selecting unit 403 selects the i-th input color gamut as the optimal input color gamut for the output destination. On the other hand, in step S178, if it is determined in step S176 that the output color gamut does not fall within the i-th input color gamut, it is determined whether i is the same as the number N of input color gamuts. Do. As described above, the input color gamuts are numbered in ascending order of color gamut size. Therefore, the Nth input color gamut is an input color gamut having the largest color gamut among the input color gamuts held by the correspondence table holding unit 111. Therefore, if i = N, that is, if the output destination color gamut does not fit in the Nth input color gamut, the process proceeds to step S177 as it is, and the Nth input color gamut is set as the optimum input color gamut. On the other hand, if i <N, i is incremented in step S179, and the process returns to step S174. Further, as described above, since the color gamut is processed in ascending order, when the color gamut is determined in step S177 after the YES branch in step S176, the determined color gamut is calculated based on the output destination profile. The minimum color gamut including the selected color gamut has been selected.

  As described above, according to the fourth embodiment, when the user inputs the profile of the output destination of the document to the image processing apparatus 2 using the UI, the input color gamut optimum for the output destination color gamut. Can be sorted automatically. Then, by inputting the document in the input color gamut according to the profile of the output destination, it is possible to prevent the color of the image from being crushed or to reduce errors due to quantization.

<Other embodiments>
In each of the above embodiments, the color conversion parameters have been described as a matrix of 3 rows and 3 columns. For example, a matrix of 3 rows and 9 columns that performs calculations using up to quadratic terms as in the following formula (7) is used. Also good.

  Furthermore, color conversion may be performed using a 3D-LUT as a color conversion parameter instead of a matrix.

  In the description of the image processing unit of the above embodiment, the number of output bits is limited to 8 bits. However, the output of the image processing apparatus in the present invention is not limited to 8 bits. Needless to say, it may be 10 bits, 12 bits, or 16 bits. In this case, when the number of bits is Mbit, Expression (3) and Expression (5) are respectively Expression (8) and Expression (9).

  In the color gamut inside / outside determination method used in the first, second, and fourth embodiments, the CIE tristimulus values XYZ are converted into RGB values of each input color gamut, and each RGB value enters 0 to 1. For example, the determination may be made by comparing the color gamut shapes three-dimensionally in the XYZ space. Furthermore, the comparison may be made not only in the XYZ space but also in the CIELAB space or the CIELUV space.

  Also, the UI in each of the above embodiments uses a radio button to select resolution, color / monochrome switching, input color gamut specification (first and second embodiments), output destination specification (third embodiment), and the like. The format is not limited to the radio button, but it goes without saying that it may be selected from a pull-down menu or manually entered in a text box.

  In addition, the input purpose in the third embodiment is to select three items of the output destination device, model name, and medium. However, the input purpose is not limited to these three items, but any item that can predict the output destination color gamut. Needless to say, it can be anything.

  In the third embodiment, when a monitor is set as an output destination device, one input color gamut is set regardless of the model. However, a monitor type, for example, a CRT monitor is used. It will be understood by those skilled in the art that the corresponding input color gamut may be changed according to the liquid crystal monitor, or the input color gamut may be changed depending on the manufacturer, product number, or the like. In the fourth embodiment, the output destination profile is held in the image processing apparatus 4 and selected from the profile. However, for example, the output destination profile is directly input to the image processing apparatus 4 from a network or a recording medium. Needless to say.

<Storage medium>
Note that the present invention can be applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, and a printer), and a device (for example, a copying machine and a facsimile device) including a single device. You may apply to.

  Another object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus, and the computer (or CPU or MPU) of the system or apparatus stores the storage medium. Needless to say, this can also be achieved by reading and executing the program code stored in.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention.

  As a storage medium for supplying the program code, for example, a floppy (registered trademark) disk (registered trademark), a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, ROM or the like can be used.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) running on the computer based on the instruction of the program code. It goes without saying that a part of the actual processing is performed and the functions of the above-described embodiments are realized by the processing.

  Further, after the program code read from the storage medium is written to a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.

It is a block diagram which shows the structure of the image processing apparatus by 1st Embodiment. It is a flowchart which shows the outline | summary of the process in the image processing apparatus by 1st Embodiment. It is a flowchart which shows the flow of a process in the input color gamut designation | designated part by 1st Embodiment. It is a figure which shows the example of a user interface by 1st Embodiment. It is a flowchart which shows the process of the image color gamut determination part by 1st Embodiment. It is a flowchart which shows the process of the input color gamut selection part by 1st Embodiment. It is a flowchart which shows the process of the color gamut inside / outside determination in 1st Embodiment. It is a figure which shows the relationship of a color gamut. It is a figure which shows the example of a warning display notified by UI part of 1st Embodiment. It is a flowchart which shows the flow of a process in an image process part. It is a figure which shows the example of the parameter corresponding table by 1st Embodiment. It is a block diagram which shows the structure of the image processing apparatus by 2nd Embodiment. It is a flowchart which shows the outline | summary of the process in the image processing apparatus by 2nd Embodiment. It is a flowchart explaining the process in the color filter selection part by 2nd Embodiment. It is a figure which shows the example of a color filter correspondence table. It is a figure which shows the structural example of the data currently hold | maintained at the image color gamut determination part. It is a block diagram which shows the structure of the image processing apparatus by 3rd Embodiment. It is a flowchart which shows the outline | summary of the process in the image processing apparatus by 3rd Embodiment. It is a flowchart which shows the flow of a process of the input objective setting part by 3rd Embodiment. It is a figure which shows the example of a user interface provided by UI part of 3rd Embodiment. It is a flowchart which shows the process in the input color gamut selection part of 3rd Embodiment. It is a figure which shows the example of the color gamut correspondence table | surface in 3rd Embodiment. It is a flowchart which shows the process in the input color gamut setting part of 3rd Embodiment. It is a figure which shows the example of the parameter corresponding table | surface in 3rd Embodiment. It is a block diagram which shows the structure of the image processing apparatus by 4th Embodiment. It is a flowchart which shows the outline | summary of the process in the image processing apparatus by 4th Embodiment. It is a figure which shows the example of the user interface shown by UI part of 4th Embodiment. It is a flowchart which shows the process in the input color gamut selection part of 4th Embodiment. It is a figure which shows the example of data of a profile. It is a figure which shows the outline | summary of the image processing system in each embodiment.

Claims (20)

An image processing method for processing an input image based on a color gamut selected from a plurality of color gamuts prepared in advance,
A calculation step of calculating a color gamut of the input image;
A selection step of selecting one of the plurality of color gamuts based on the color gamut of the input image calculated in the calculation step;
A processing step of processing the input image based on the color gamut selected in the selection step. Further comprising a designation step for allowing a user to designate a desired color gamut from the plurality of color gamuts,
The selecting step is performed when the specified color gamut specified in the specifying step matches the selected color gamut selected from the plurality of color gamuts based on the color gamut calculated in the calculating step. The image processing method according to claim 1, wherein a color gamut is selected as a color gamut used in the processing step.   The image processing method according to claim 2, further comprising a notification step of notifying a user when the designated color gamut does not match the selected color gamut.   The image processing method according to claim 2, wherein, in the selection step, the selected color gamut is a minimum color gamut including the calculated color gamut among the plurality of color gamuts. .   The image processing method according to claim 3, wherein the selected color gamut is presented in the notification step. An image input control method for inputting an image using a color filter selected from a plurality of color filters prepared in advance,
A calculation step of reading an image using a color filter having the maximum color gamut and calculating the color gamut of the obtained image;
A selection step of selecting one of a plurality of color filters prepared in advance based on the color gamut calculated in the calculation step;
And a reading step of reading an image using the color filter selected in the selection step. A designation step for allowing a user to designate a desired color filter from the plurality of color filters;
In the selection step, when the color filter selected based on the calculated color gamut matches the color filter specified in the specification step, the color filter is selected to be used in the reading step. The image input control method according to claim 6, wherein:   8. The image input control method according to claim 7, further comprising a notification step of notifying a user when the selected color filter does not match the designated color filter.   The selected color filter is a color filter corresponding to a minimum color gamut including a color gamut calculated in the calculation step among a plurality of color gamuts corresponding to the plurality of color filters. The image input control method according to claim 7.   The image input control method according to claim 8, wherein the selected color filter is presented in the notification step. An image processing method for processing an input image based on a color gamut selected from a plurality of color gamuts prepared in advance,
An input process for inputting information about the output destination of the input image;
A selection step of selecting one of the plurality of color gamuts as a color gamut of an input image based on the information about the output destination;
A processing step of processing the input image based on the color gamut selected in the selection step.   12. The image processing method according to claim 11, wherein in the input step, at least one of an output destination device, an output medium, and a profile relating to an output destination color gamut is input. Registration means for registering information relating to an output destination and one of the plurality of color gamuts,
The image processing method according to claim 11, wherein the selecting step selects a color gamut with reference to the registration unit.   12. The image processing method according to claim 11, wherein the processing step converts the input image using a conversion parameter corresponding to the color gamut selected in the selection step. An image processing apparatus that processes an input image based on a color gamut selected from a plurality of color gamuts prepared in advance,
Calculating means for calculating a color gamut of the input image;
Selection means for selecting one of the plurality of color gamuts based on the color gamut of the input image calculated by the calculation means;
An image processing apparatus comprising: processing means for processing the input image based on the color gamut selected by the selection means. An image input control device for inputting an image using a color filter selected from a plurality of color filters prepared in advance,
A calculation means for reading an image using a color filter having the maximum color gamut and calculating the color gamut of the obtained image;
Based on the color gamut calculated by the calculation means, a selection means for selecting one of a plurality of color filters prepared in advance,
An image input control apparatus comprising: a reading unit that reads an image using the color filter selected by the selection unit. An image processing apparatus that processes an input image based on a color gamut selected from a plurality of color gamuts prepared in advance,
Input means for inputting information about the output destination of the input image;
Selection means for selecting one of the plurality of color gamuts as a color gamut of an input image based on information on the output destination;
An image processing apparatus comprising: processing means for processing the input image based on a color gamut selected by the selection means.   A control program for executing the image processing method according to any one of claims 1 to 5 and 11 to 14 by a computer.   A control program for executing the image input control method according to claim 6 by a computer.   A storage medium for storing the control program according to claim 15 or 16.

Images