JP2009253474A - Image processing device, image processing method, and image processing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To designate an arbitrary area within an object image in an image processing device and to intuitively adjust a color of the designated area by a simple operation while seeing an image. <P>SOLUTION: An image processing device has a designated image reading portion 501 reading an arbitrary image, a display portion 30 displaying the image, an RGB value obtaining portion 502 obtaining an RGB value of the image, an adjusting area designating portion 505 designating an arbitrary adjusting area, an adjusting area RGB value obtaining portion 503 obtaining an RGB value of an adjusting area, a color coordinate value converting portion 504 converting the RGB value into a color coordinate value, an image data updating portion 508 changing a brightness value and a saturation value according to a predetermined operation on a display image and changing a color phase value, an RGB value converting portion 509 converting the color phase value, the brightness value, and the saturation value of the adjusting area after the change into an RGB value, a change image forming portion 510 forming an image corresponding to the RGB value converted, and the display portion 30 displaying the formed image. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image processing apparatus, an image processing method, and an image processing program that enable image color adjustment on an application. The present invention relates to an image processing apparatus, an image processing method, and an image processing program for intuitively adjusting the color of the image.

  As a method of adjusting the color tone of a color image in a conventional image forming apparatus, there is a method of adjusting the color of image data by considering each color space such as hue, saturation, and brightness, and changing each of these configuration values. (For example, see Patent Documents 1 and 2.)

The image processing apparatus disclosed in Patent Document 1 is based on color space conversion means for converting the input first color space data into color space data that matches the human color sense, and the adjustment value input in the color space. And adjusting means for adjusting the color space data matching the human color sense after conversion based on the input adjustment value, and display means for displaying the adjustment result. It has a configuration.
The above-mentioned “color space that matches the human color sensation” means a color space based on hue, saturation, and brightness.

  Further, the airbrush method of Patent Document 2 converts RGB data into image data of brightness / saturation / hue coordinate system, and performs airbrush processing on the converted image data of brightness / saturation / hue coordinate system. The image data corresponding to the airbrush information is extracted from the converted lightness / saturation / hue image data, and the lightness / saturation / hue system extracted based on the airbrush information is specified. The airbrush process is performed on the image data.

  As described above, since the techniques described in Patent Document 1 and Patent Document 2 both perform editing using image data in the brightness / saturation / hue coordinate system, natural colors that are close to human senses. Adjustment is possible.

In addition, there is a method of performing color adjustment using general image processing software such as Photoshop (Adobe Systems Incorporated registered trademark).
That is, first, the target image is displayed on the monitor and the range of the adjustment portion is designated.
Next, a GUI (Graphical User) for color adjustment such as a slide bar
Interface), the user performs adjustments such as how much the hue is rotated, how much the lightness is raised and lowered, and how much the saturation is raised and lowered.
Then, the image after the adjustment is displayed on the monitor for confirmation, and the same operation is repeated until the user is satisfied with the color.

Japanese Patent No. 3809217 JP-A-6-333039

However, in the image processing apparatus described in Patent Document 1, the entire image is a target for color adjustment, and is not a target for partial color adjustment of an image.
For this reason, it is not suitable for color adjustment that requires delicate expression, and lacks convenience and flexibility.
The airbrush method described in Patent Document 2 is also inconvenient for the user because it is difficult to specify the shape of the region precisely.
In addition, according to image processing software such as Photoshop (Adobe Systems Incorporated registered trademark), the adjustment work is divided into two stages of image display / range specification and color parameter adjustment work, and the operation is troublesome. It was a thing.
Therefore, these conventional techniques are inconvenient for the user, such as inability to specify a region and inefficient parameter setting.

  The present invention has been proposed in order to solve the problems of the conventional techniques as described above. An arbitrary area in a display image is designated, and the color of the designated area is viewed while viewing the image. An object of the present invention is to provide an image processing apparatus, an image processing method, and an image processing program that can be intuitively adjusted by simple operations.

  In order to achieve the above object, an image processing apparatus according to the present invention is an image processing apparatus for adjusting the color of a displayed image, and reads an arbitrary image in accordance with an input operation. Image reading means, first display means for displaying the read image, RGB value acquisition means for acquiring the RGB value of the read image, and an area for designating an arbitrary adjustment area in the display image based on a predetermined operation A specification means, an adjustment area RGB value acquisition means for acquiring an RGB value of the specified adjustment area, and a colorimetric value conversion means for converting the acquired RGB value of the adjustment area into values of hue, brightness, and saturation; First parameter changing means for changing the brightness and saturation values according to a predetermined operation on the display image; and second parameter changing means for changing the hue value according to a predetermined operation on the display image; The above An RGB value converting means for converting the hue, lightness, and saturation values of the adjustment area after being changed into RGB values, and a changed image forming means for forming an image corresponding to the converted RGB values, And a second display means for displaying the image.

According to the image processing apparatus of the present invention having such a configuration, not only the color adjustment of the entire arbitrary image can be performed, but also a partial area of the display image can be designated and flexible color adjustment limited to the designated area can be performed. It is like that.
In addition, while watching the color change in the display image, it is possible to simultaneously adjust the color, brightness, saturation and hue of the designated area.
For this reason, it is possible to easily process natural color adjustment that is excellent in convenience and close to human color sensation based on an intuitive operation.

According to a second aspect of the present invention, there is provided the image processing apparatus according to the second aspect, wherein a graph corresponding to a change value of lightness and saturation is superimposed on the display image in accordance with a predetermined operation on the display image. Graph display means is provided, and the first parameter changing means changes the values of lightness and saturation according to a designated point corresponding to a predetermined operation on the graph.
And as described in Claim 3, said 1st parameter change means changes the value of lightness and saturation according to the distance and direction between two points designated according to the predetermined operation on the said graph. It is like that.
Furthermore, as described in claim 4, a pointing device as input means is provided, wherein the first parameter changing means includes a distance between two points on the graph indicated by a drag start point and a drag end point of the pointing device, and The values of brightness and saturation are changed according to the direction.
On the other hand, as described in claim 5, the second parameter changing means changes a hue value in accordance with a rotation operation of a wheel provided in the pointing device.

According to the image processing apparatus of the present invention having such a configuration, brightness and saturation can be adjusted by a drag operation on a display screen by a pointing device such as a mouse, and at the same time, a hue can be adjusted by a wheel rotation operation. It can be adjusted.
In particular, when adjusting the brightness and saturation, a graph showing the parameters is displayed, and the user can easily adjust the color while viewing the graph.
Therefore, according to the present invention, a plurality of operations necessary for color adjustment can be easily adjusted by a series of operations while viewing a display image.

According to a sixth aspect of the present invention, in the image processing apparatus according to the sixth aspect, the area designating unit sets an arbitrary closed area formed in response to a predetermined operation of the pointing device as the adjustment area. Yes.
According to a seventh aspect of the present invention, the area designating unit defines a closed area of a rectangle formed by using two points designated as opposing vertices according to a predetermined operation of the pointing device or an inscribed circle thereof as the adjustment area. And so on.

According to the image processing apparatus of the present invention having such a configuration, not only can the color adjustment of a wide range of the target image be performed at once, but also the color can be specified by operating various pointing areas and fine areas by operating the pointing device. It can be adjusted.
For this reason, a user's desired area | region can be designated and the color adjustment process excellent in the flexibility is enabled.

  According to another aspect of the present invention, an image processing apparatus includes an image data storage unit that stores an image formed by the modified image forming unit in a desired data format.

According to the image processing apparatus of the present invention having such a configuration, the adjusted image data can be stored in a user-desired image format, and the color-adjusted image can be used in various forms. Will be able to.
For this reason, it is possible to realize an image processing apparatus excellent in expandability as well as the same operation as described above.

  The image processing method of the present invention is an image processing method for adjusting the color of a displayed image as described in claim 9, wherein an arbitrary image is read according to an input operation, and the read A step of displaying the image; a step of acquiring an RGB value of the read image; a step of specifying an arbitrary adjustment region in the display image based on a predetermined operation; and acquiring an RGB value of the specified adjustment region Converting the acquired RGB values of the adjustment area into hue, brightness, and saturation values; changing the brightness and saturation values according to a predetermined operation on the display image; and A step of changing the value of the hue in accordance with a predetermined operation on the display image, a step of converting the value of the hue, lightness, and saturation of the adjustment area after the change into an RGB value; There as a method having the steps of forming an image corresponding to the serial RGB values, and displaying the image formed, the.

Thus, the present invention can be realized not only as the above-described apparatus invention but also as a method invention.
Therefore, the invention can be implemented without being restricted by the hardware configuration, and thus can be provided as a method having excellent versatility and expandability.

  According to a tenth aspect of the present invention, there is provided an image processing program for causing an image processing apparatus to perform color adjustment of a displayed image, wherein the computer constituting the image processing apparatus includes: Image reading means for reading an arbitrary image in response to an input operation, first display means for displaying the read image, RGB value acquisition means for acquiring the RGB value of the read image, arbitrary image in a display image based on a predetermined operation An area specifying means for specifying the adjustment area, an adjustment area RGB value acquiring means for acquiring the RGB value of the specified adjustment area, and a color specification for converting the acquired RGB value of the adjustment area into hue, lightness, and saturation values Value conversion means, first parameter changing means for changing the values of brightness and saturation according to a predetermined operation on the display image, and the hue of the hue according to a predetermined operation on the display image A second parameter changing means for changing the color, a RGB value converting means for converting the hue, brightness, and saturation values of the adjustment area after the change into RGB values, and forming an image corresponding to the converted RGB values. The program serves as a modified image forming unit and a second display unit that displays the formed image.

Thus, the present invention can also be realized as a program.
As a result, the present invention can be realized by installing programs not only in image forming apparatuses such as printers and multifunction peripherals but also in a wide range of electrical equipment, and provided as an excellent image processing program that is effective for versatility and expandability. can do.

As described above, according to the image processing apparatus of the present invention, an intuitive color adjustment operation can be performed while viewing the color change of an image, and an area can be freely specified and only that area is subjected to color adjustment. As a result, natural and flexible color adjustment according to the human visual sense can be easily performed.
Moreover, since the adjusted image data can be stored based on the data format desired by the user, it is possible to improve convenience and expandability.

A preferred embodiment of the present invention will be described below with reference to FIGS.
Here, the image processing apparatus of the present embodiment described below is realized by processes, means, and functions executed by a computer in accordance with instructions of a program (software). The program sends a command to each component of the computer to perform predetermined processing and functions as shown below. That is, each process / means in the image processing apparatus of the present embodiment is realized by specific means in which a program and a computer cooperate.
Note that all or part of the program is provided by, for example, a magnetic disk, optical disk, semiconductor memory, or any other computer-readable recording medium, and the program read from the recording medium is installed in the computer and executed. The The program can also be loaded and executed directly on a computer through a communication line without using a recording medium.

FIG. 1 is a block diagram showing a configuration of an image processing apparatus according to an embodiment of the present invention.
As shown in FIG. 1, the image processing apparatus 1 according to the present embodiment includes an HDD (hard disk drive) 10, a memory 20, a display unit 30, an input unit 40, and a color adjustment application 50.
The HDD 10 stores (stores) the original image data and the adjusted image data as image files.
The memory 20 includes original image data (image data before being adjusted by the color adjustment application 50) extracted from the HDD 10, post-adjustment image data (image data after being adjusted by the color adjustment application 50), and the like. Is memorized.

The display unit 30 (display, monitor, etc.) is a GUI (Graphical User).
A screen as shown in FIG. 11 is displayed by an OS (Operating System) in which the function of (Interface) is implemented.
That is, on this screen, an adjustment image a, an adjustment area b to be subjected to color adjustment, and a graph c (consisting of a Saturation axis, a Lightness axis, a numerical value axis, and a scale) as a guideline for performing color adjustment are displayed. indicate.
As shown in FIG. 2, the display unit 30 can display a list of images that can be used as adjustment images (adjustment image selection screen).

The input unit 40 includes a so-called pointing device. For example, the input unit 40 includes a mouse, a trackball, a touch pad, a joystick, a touch panel, and the like.
In particular, in the present embodiment, the mouse 401 is used as the input unit 40, and not only the adjustment area b is designated by a predetermined operation of the mouse 401, but also variously according to the drag operation of the mouse 401 or the rotation operation of the mouse wheel 401a. Color adjustments are made.
Further, the input unit 40 designates an adjustment image from the image list displayed on the display unit 30.

[Color Adjustment Application 50]
A designated image reading unit (image reading means) 501 reads data of all pixels of an arbitrary image (adjustment image) selected by the user from one or more images stored in the HDD 10 via the memory 20. It is.
Specifically, the data of the image selected and determined with the mouse or the like from the adjustment image selection screen shown in FIG. 2 (in this case, image 8) is read.

  An RGB value acquisition unit (RGB value acquisition unit) 502 acquires RGB values for all the pixels of the adjustment image acquired by the image reading unit 501.

  The adjustment region RGB value acquisition unit (adjustment region RGB value acquisition means) 503 extracts only RGB values in the adjustment region designated by the user from among the RGB values acquired by the RGB value acquisition unit 502.

A color value conversion unit (color value conversion means) 504 converts the RGB value in the adjustment area obtained by the adjustment area RGB value acquisition unit 503 into a color system value composed of hue, brightness, and saturation. is there.
Specifically, there are conversion methods to HLS (Hue, Saturation, Lightness), LCH (Light, Color, Hue), HSV (Hue, Saturation, Value), etc. Get the required color values.

  An adjustment area designation unit (area designation unit) 505 designates an arbitrary area (adjustment area) in the adjustment image in accordance with a user operation via the input unit 40, and determines a target area for color adjustment. Is.

Here, the adjustment area designation method performed by the adjustment area designation unit of the image processing apparatus according to the present embodiment will be described in detail with reference to FIG.
FIG. 3 is a diagram illustrating an example of area designation performed by the adjustment area designation unit of the image processing apparatus according to the present embodiment.
As shown in the figure, the area designation can be determined by selecting a circle (ellipse), a rectangle, or a free shape based on the operation of the mouse 401 on the display screen.

For example, when selecting a circle (ellipse) as shown in FIG. 3A, the user is allowed to designate two arbitrary points (A1, A2) on the image.
As a result, a rectangle in which one point (A1) is a vertex and the other point (A2) is a diagonal vertex is determined, and the location and size of the rectangle are uniquely specified.
A circle (ellipse) inscribed in the rectangle is set as an adjustment region.
On the other hand, when a rectangle is selected as shown in FIG. 3B, similarly, the user designates two points (B1, B2) on the image, and the formed rectangular internal area is set as the adjustment area.
Note that the above two points when a circle (ellipse) or rectangle is used as an area may be specified by clicking an arbitrary point on the screen, or by specifying two points by a drag and drop operation. There may be.

  When a free shape is selected as the adjustment area as shown in FIG. 3C, the user can drag the inside of the image, continuously click, etc. to make a desired closed area (in the case of FIG. Closed region) is formed, and this closed region is set as an adjustment region.

These adjustment areas can be designated in units of one pixel.
For this reason, it is possible to specify an area for details of the adjustment image, and to perform fine and fine color adjustment.

The image display processing unit 506 not only displays the adjustment image on the display unit 30 based on the original image data extracted from the memory 20 but also the color adjustment application 50 based on the adjusted image data extracted from the memory 20. The image after the adjustment is displayed on the display unit 30.
Furthermore, the image display processing unit 506 displays a graph c as a GUI on the display unit 30 in cooperation with the input unit 40 (graph display means of the present invention).
Specifically, a graph c including a Saturation axis, a Lightness axis, a numerical value axis, and a scale is displayed with the drag start point of the mouse 401 as the center.

The parameter calculation unit 507 calculates hue, brightness, and saturation parameters to be changed when performing color adjustment of the region specified by the adjustment region specification unit 505.
When changing the brightness and saturation, the parameters are determined according to the starting point and the ending point of the mouse drag with reference to the scale of the graph c displayed as the GUI.
Further, when changing the hue, the parameter is determined according to the rotation amount and the rotation direction of the mouse wheel 401a.

  The image data update unit 508 updates the brightness and saturation values of the adjustment area in accordance with the brightness and saturation parameters calculated by the parameter calculation unit 507 (first parameter changing unit) and also according to the hue parameters. The hue value of the adjustment area is updated (second parameter changing means).

An RGB value conversion unit (RGB value conversion means) 509 returns the image data in the adjustment area updated by the image data update unit 508 to RGB values.
Specifically, a process for returning data composed of hue, brightness, and saturation to the original RGB values is performed.

The changed image forming unit (changed image forming unit) 510 forms data of the entire image after adjustment based on the RGB values obtained by the RGB value converting unit 509.
The adjusted image data thus formed is displayed on the display unit 30 by the second display means of the present invention.
The adjusted image data can be converted into an arbitrary storage format (for example, Bitmap, JPEG, png, tif, etc.) by a predetermined operation of the user and stored in the HDD 10 or the memory 20 (in the present invention). Image data storage means).

Next, a color adjustment processing procedure in the image processing apparatus 1 of the present embodiment configured as described above will be described with reference to FIGS.
FIG. 4 is a flowchart showing an overall processing procedure regarding color adjustment in the image processing apparatus according to the present embodiment.

As shown in FIG. 4, the color adjustment application 50 of the image processing apparatus 1 according to the present embodiment performs an initial image display process (S401).
Therefore, the initial image display processing according to the present embodiment will be described in detail with reference to FIG.

(Initial image display processing)
FIG. 5 is a flowchart showing in detail the procedure of initial image processing in the image processing apparatus 1 according to the present embodiment.
Here, first, as shown in FIG. 2, the color adjustment application 50 reads from the HDD 10 what the user has selected and determined as an image for which color adjustment is desired (S501).
Then, the image data is developed in the memory 20, converted into a predetermined display format, and displayed on the display unit 30 (S502). As a result, the adjustment image a as shown in FIG. 9 is displayed on the monitor or the like, and the initial image display process ends.

Returning to FIG. 4, next, the color adjustment application 50 acquires an arbitrary adjustment region in the adjustment image a based on the GUI (S402).
As described above, as the adjustment area, a desired area such as a circle (ellipse), a rectangle, or a free shape can be acquired according to the operation of the mouse 401.
In the case of this embodiment, as shown in FIG. 10, the inside of the thick frame shown in the center left side of the same figure shall be acquired as an adjustment area.
Then, the color adjustment application 50 determines whether or not the adjustment area designation process is selected (S403).
For example, a confirmation button based on a GUI is prepared on the display screen, and it is confirmed that the adjustment area designation process has been selected by clicking the confirmation button.

If it is confirmed in step S403 that the adjustment area designation process has been selected (S403: YES), the color adjustment application 50 recognizes the adjustment area (S404).
On the other hand, if the adjustment area designation process is not selected in step S403 (S403: NO), that is, if the user does not accept the shape or the like of the acquired adjustment area, until the area that the user can convince is acquired, The process of step S402 will be repeated.

Next, the color adjustment application 50 performs color adjustment processing (S405).
Therefore, the color adjustment processing according to the present embodiment will be described in detail with reference to FIG.

(Color adjustment processing)
FIG. 6 is a flowchart showing in detail the procedure of color adjustment processing in the image processing apparatus 1 according to the present embodiment.
As shown in the figure, first, the color adjustment application 50 determines whether or not an event with the mouse 401 has occurred on the window form (S601).
Specifically, an event occurs according to an operation such as whether the user drags the mouse 401 or rotates the mouse wheel 401a on the adjustment image a.
In step S601, when the user performs a drag operation of the mouse 401 on the window, the process proceeds to lightness / saturation adjustment processing (FIG. 7) (S602).
On the other hand, if the user performs a rotation operation of the mouse wheel 401a in step S601, the process proceeds to a hue adjustment process (FIG. 8) (S603).
The lightness / saturation adjustment process and hue adjustment process will be described in detail with reference to FIGS.

(Brightness / saturation adjustment processing)
FIG. 7 is a flowchart showing in detail the procedure of brightness / saturation adjustment processing in the image processing apparatus 1 according to the present embodiment.
First, the color adjustment application 50 acquires the coordinates (X1, Y1) of the drag start point of the mouse 401 (S701).
Actually, the relative coordinate value in the image at the point where the user starts dragging the mouse 401 on the screen is acquired.

Next, the color adjustment application 50 displays an X axis (Saturation axis), a Y axis (Lightness axis), a numerical value axis, and a scale in a rectangular area centered on the drag start point of the mouse 401, as shown in FIG. A graph c serving as a reference for color adjustment is formed (S702).
The graph c is displayed so that the drag start point of the mouse 401 is the origin, as shown in FIG. Further, it is preferable that the portion other than the axis is transparent or translucent so that the image behind can be seen.
Further, it is assumed that the graph c continues to be displayed at the same position and shape until the user finishes dragging the mouse 401.

Next, with the movement of the mouse 401, the color adjustment application 50 starts executing the loop A (step S703). This loop A is repeatedly executed while the drag operation of the mouse 401 is continued.
Specifically, as shown in FIG. 12A, the current coordinates (X2, Y2) indicated by the pointer are acquired according to the drag operation of the mouse 401 (S704).
Next, the saturation S and lightness L corresponding to the acquired coordinates (X2, Y2) are obtained by the following equations (S705).
S = X2-X1
L = Y2-Y1
(However, the coordinates of the origin are (X1, Y1).)

Then, the RGB value of the pixel in the adjustment area b is acquired together with the coordinate data of the pixel and stored in the memory 20 (S706).
When the RGB values of the pixels in the adjustment area b are obtained, the color adjustment application 50 starts executing the loop B (S707). This loop B is executed for the RGB values of all the pixels in the adjustment area b.
In the loop B, first, the acquired RGB values are converted into color system values representing hue, saturation, and brightness (S708).
Specifically, one or a combination of HLS, LCH, HSV, or the like is selected, and each color value is acquired using a predetermined conversion formula.

Next, the saturation value of the adjustment region b is changed according to the value of the saturation S, and the lightness value of the adjustment region b is changed according to the value of the lightness L (S709).
Then, the color system values including the changed saturation value and lightness value are converted into RGB values (S710).
When the execution of the process in step S710 is completed, the color adjustment application 50 ends one loop of loop B. Since the loop B is executed for each pixel, when the loop B is executed for all the pixels, the loop process ends (S711).

Next, the color adjustment application 50 stores the RGB value obtained through the loop B in the original position of the adjustment area b (S712).
That is, the image data after the saturation and brightness are changed by this process is formed.
Then, the display image of the adjustment image a is updated (S713). This update process is continued while the mouse 401 is being dragged.
For this reason, the user can confirm a change in color at the same time as the drag operation.
When the drag operation of the mouse 401 is finished, the process of Loop A is finished (S714), and the display of the graph c is finished (S715).
Thereby, the lightness / saturation adjustment processing is completed.

(Hue adjustment processing)
FIG. 8 is a flowchart showing in detail the procedure of hue adjustment processing in the image processing apparatus 1 according to the present embodiment.
As shown in the figure, the color adjustment application 50 starts execution of loop A as the mouse wheel 401a rotates (S801). This loop A is executed while the rotation operation of the mouse wheel 401a is continued.

In the loop A, first, the rotation direction and the rotation amount of the mouse wheel 401a are acquired (S802).
Therefore, it is assumed that the hue value is standardized in a section from 0 degrees to 360 degrees.
Specifically, as shown in FIG. 12B, the rotation direction of the mouse wheel 401a is associated with the angular direction of the hue, and the rotation amount of the mouse wheel 401a is associated with the number of hue angles.

Then, the RGB value of the pixel in the adjustment area b is acquired together with the coordinate data of the pixel and stored in the memory 20 (S803).
When the RGB values of the pixels in the adjustment area b are obtained, the color adjustment application 50 starts executing the loop B (S804). This loop B is executed for the RGB values of all the pixels in the adjustment area b.
First, the acquired RGB values are converted into color system values representing hue, saturation, and brightness (S805).

Next, the hue value is changed according to the rotation direction and the rotation amount of the mouse wheel 401a (S806).
Then, the color system values including these changed hue values are converted into RGB values (S807).
When the execution of the process in step S807 is completed, the color adjustment application 50 ends one loop of loop B. Since the loop B is executed for each pixel, when the loop B is executed for all the pixels, the loop process ends (S808).

Next, the color adjustment application 50 stores the RGB value obtained through the loop B in the original position of the adjustment area b (S809).
That is, the image data after the hue is changed by this processing is formed.
Then, the display image of the adjustment image is updated (S810). This update process is continued while the mouse wheel 401a is being rotated.
When the rotation operation of the mouse wheel 401a is finished, the process of Loop A is finished (S811), and the hue adjustment process is finished.

Returning to FIG. 6, next, the color adjustment application 50 determines whether or not to reflect the color adjustment (S604).
Specifically, in order to make the user determine whether to reflect the color adjustment processing (lightness / saturation adjustment processing, hue adjustment processing) performed so far, the image a ′ and GUI after color adjustment shown in FIG. A confirmation button and the like are prepared on the screen.
Then, when the user makes a specification reflecting the color adjustment process (S604: YES), the color adjustment process ends, and the process proceeds to step S406 in FIG.
On the other hand, when the user does not specify to reflect the color adjustment process (S604: NO), the display image is returned to the image before the color adjustment is performed (S605), and the process proceeds to step S406 in FIG.

In step S406 of FIG. 4, the color adjustment application 50 determines whether or not the end of the color adjustment process has been selected (S406).
Specifically, a GUI for allowing the user to select the end of the color adjustment process is prepared on the display screen, and when the user selects the end of the color adjustment process via this GUI, the next step is performed. If it is determined that the end of the color adjustment process is not selected (S406: NO), the process returns to S404 and the color adjustment process is repeated.

If the end of the color adjustment process is selected in step S406 (S406: YES), the color adjustment application 50 determines whether the image storage process is selected (S407).
Specifically, a GUI for allowing the user to select image storage is prepared on the display screen, and when the user selects image storage via this GUI, the process proceeds to the next step and image storage is selected. If not (S407: NO), the image is not saved and the process ends.
If the image saving process is selected in step S407 (S407: YES), the adjusted image is saved in the format specified by the user (any image format such as bitmap, JPEG, png, tif) ( S408), the entire process is completed.

As described above, according to the image processing apparatus 1 of the present embodiment, the color of an image can be adjusted by a simple operation.
Specifically, the adjustment area b can be designated and the color in the adjustment area b can be adjusted according to the drag operation of the mouse 401, the rotation operation of the mouse wheel 401a, or the like.
In addition, since the user can simultaneously adjust the hue, saturation, and brightness according to the operation on the graph c displayed superimposed on the image while watching the color change on the image, More sensuous and simple image adjustment according to the color sensation is possible.
In addition, the hue, brightness, and saturation parameters can be set repeatedly and the adjustment area can be designated, which is excellent in convenience.
Further, the adjusted image data can be saved in an arbitrary image format.
Therefore, according to the present embodiment, it is possible to provide the image processing apparatus 1 that can perform delicate and natural color adjustment over the details of the target image, and that is excellent in convenience and expandability.

As described above, the image processing apparatus 1 of the present invention has been described with reference to the preferred embodiment. However, the image processing apparatus 1 according to the present invention is not limited to the above-described embodiment, and variously within the scope of the present invention. Needless to say, it is possible to implement this change.
For example, the color adjustment operation of the present invention is not limited to the operation of the mouse 401, and can be replaced by other operations such as a pen tablet, a touch pad, and a touch panel.
Also, the drag operation of the mouse 401 and the rotation operation of the mouse wheel 401a can be replaced by a tilt operation or other button operations provided in the pointing device.

  The present invention can be suitably used for an image processing apparatus such as an image forming apparatus or a personal computer having an image processing function related to color adjustment.

1 is a block diagram illustrating a configuration of an image processing apparatus according to an embodiment of the present invention. It is explanatory drawing which shows the structure of the image selection screen for adjustment displayed on the display part of the image processing apparatus which concerns on this embodiment. It is the figure which showed the example of the area | region designation | designated performed by the adjustment area | region designation | designated part of the image processing apparatus which concerns on this embodiment. 5 is a flowchart showing an overall processing procedure related to color adjustment in the image processing apparatus according to the present embodiment. 3 is a flowchart showing in detail a procedure of initial image processing in the image processing apparatus according to the present embodiment. 5 is a flowchart showing in detail a procedure of color adjustment processing in the image processing apparatus according to the present embodiment. It is the flowchart which showed in detail the procedure of the lightness / saturation adjustment processing in the image processing apparatus according to the present embodiment. 5 is a flowchart showing in detail a procedure of hue adjustment processing in the image processing apparatus according to the present embodiment. It is an image for adjustment before color adjustment is performed by the image processing apparatus according to the present embodiment. FIG. 11 is an image showing an adjustment area designated on the adjustment image shown in FIG. 10. FIG. It is an image which shows the graph displayed on the image for adjustment shown in FIG. It is explanatory drawing for demonstrating color adjustment operation in the image processing apparatus 1 which concerns on this embodiment. It is an image after color adjustment is performed by the image processing apparatus according to the present embodiment.

Explanation of symbols

1 Image processing device 10 HDD
20 Memory 30 Display unit 40 Input unit 50 Color adjustment application

Claims (10)

An image processing apparatus for adjusting the color of a displayed image,
Image reading means for reading an arbitrary image in response to an input operation;
First display means for displaying the read image;
RGB value acquisition means for acquiring RGB values of the read image;
Area designating means for designating an arbitrary adjustment area in the display image based on a predetermined operation;
Adjustment region RGB value acquisition means for acquiring RGB values of the specified adjustment region;
Color value conversion means for converting the acquired RGB values of the adjustment area into hue, brightness, and saturation values;
First parameter changing means for changing the brightness and saturation values according to a predetermined operation on the display image;
Second parameter changing means for changing the value of the hue according to a predetermined operation on the display image;
RGB value conversion means for converting the hue, brightness, and saturation values of the adjustment area after the change into RGB values;
Changed image forming means for forming an image corresponding to the converted RGB values;
Second display means for displaying the formed image;
An image processing apparatus comprising: A graph display means for displaying a graph corresponding to a change value of lightness and saturation in accordance with a predetermined operation on the display image, overlaid on the display image;
The first parameter changing means is
The image processing apparatus according to claim 1, wherein values of brightness and saturation are changed according to a specified point corresponding to a predetermined operation on the graph. The first parameter changing means is
The image processing apparatus according to claim 2, wherein brightness and saturation values are changed according to a distance and a direction between two points designated according to a predetermined operation on the graph. It has a pointing device as an input means,
The first parameter changing means is
The image processing apparatus according to claim 2 or 3, wherein values of brightness and saturation are changed according to a distance and a direction between two points on the graph indicated by a drag start point and a drag end point of the pointing device. The second parameter changing means includes
The image processing apparatus according to claim 4, wherein the hue value is changed according to a rotation operation of a wheel provided in the pointing device. The area specifying means includes:
The image processing apparatus according to claim 4, wherein an arbitrary closed region formed in accordance with a predetermined operation of the pointing device is used as the adjustment region. The area specifying means includes:
The image processing apparatus according to claim 4, wherein the adjustment area is a rectangle formed by using two points designated according to a predetermined operation of the pointing device as opposed vertices or a closed area of an inscribed circle thereof. .   The image processing apparatus according to claim 1, further comprising an image data storage unit that stores an image formed by the changed image forming unit in a desired data format. An image processing method for adjusting the color of a displayed image,
A step of reading an arbitrary image according to an input operation;
Displaying the read image;
Obtaining RGB values of the read image;
Designating an arbitrary adjustment area in the display image based on a predetermined operation;
Obtaining RGB values of the specified adjustment region;
Converting the acquired RGB values of the adjustment region into hue, brightness, and saturation values;
Changing the brightness and saturation values according to a predetermined operation on the display image;
Changing the value of the hue according to a predetermined operation on the display image;
Converting the hue, brightness, and saturation values of the adjustment area after the change into RGB values;
Forming an image corresponding to the converted RGB values;
And a step of displaying the formed image. A program for causing an image processing apparatus to perform color adjustment of a displayed image,
A computer constituting the image processing apparatus;
Image reading means for reading an arbitrary image in response to an input operation,
First display means for displaying the read image;
RGB value acquisition means for acquiring RGB values of the read image;
Area designating means for designating an arbitrary adjustment area in the display image based on a predetermined operation;
Adjustment region RGB value acquisition means for acquiring RGB values of the specified adjustment region;
A color value conversion means for converting the acquired RGB values of the adjustment region into hue, brightness, and saturation values;
First parameter changing means for changing the values of brightness and saturation according to a predetermined operation on the display image;
Second parameter changing means for changing the hue value according to a predetermined operation on the display image;
RGB value conversion means for converting the hue, brightness, and saturation values of the adjustment area after the change into RGB values;
Changed image forming means for forming an image corresponding to the converted RGB values;
An image processing program for functioning as second display means for displaying the formed image.