JP2011232881A - Image processor, display device, image processing method, image processing program and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device allowing a user to freely and easily set a range to be image-processed such as drawing of a background color for a target image through multi touch.SOLUTION: A display device 100 comprises a position detection part 21b that detects position coordinates of two different points on a touch panel display part 10 when touched with a finger or the like and a size and angle detection part 21d that calculates a distance A between the two points. And an image processing part 22c sets a region with a blackboard eraser icon having a short side length of A and a long side length of 2A displayed on an icon display part as a region to be erased or drawn with a background color.

Description

  The present invention mainly relates to an image processing apparatus for processing an image, an image processing method, an image processing program, and a computer-readable recording medium.

  In recent years, the operability of image editing software has been greatly improved with the touch panel of a display device such as a display, the OS installed in an information processing device such as a notebook PC, and the touch panel function of image editing software. Yes.

  That is, in image editing software, it is common to edit an image by operating a pointing device such as a mouse or a tablet pen. However, if image editing software corresponding to a touch panel function is used, the user can operate the touch panel. This allows you to edit images as if you were painting directly on the campus.

  In addition, the touch panel initially has only a touch panel that supports only a single touch, but some recently-released notebook PCs and displays have a touch panel that supports multi-touch. Along with this, some OSs and image processing software that have been recently released are designed for multi-touch.

  The image editing software that supports multi-touch has excellent operability of image editing software, such as being able to rotate, enlarge, and reduce images displayed by multi-touch operations. ing.

  As image editing software for editing an image with a pointing device, for example, an image processing program recorded in an image processing apparatus described in Patent Document 1 can be cited. In this program, it is possible to edit a brush pattern image for performing brush writing processing on the image, and to select a size of an eraser for deletion processing in editing the brush pattern image from predetermined different sizes. It has become.

  Further, as image editing software capable of editing an image by operating a touch panel, there is a drawing software installed in a PC described in Patent Document 2. In the drawing software described in Patent Document 2, the size of the eraser icon can be changed step by step while the touch panel of the display device connected to the PC is being pressed.

JP 2002-109557 A (published April 12, 2002) Japanese Patent Laid-Open No. 3-286267 (published on December 17, 1991)

  However, in the above-described conventional configuration, although the range where the eraser icon has been swept on the image can be deleted (that is, the background color), the size of the eraser icon can only be set in steps. was there.

  In addition, the multi-touch compatible image editing software has a problem that the user cannot freely set a range for image processing by multi-touch.

  The present invention has been made in view of the above problems, and a main object thereof is to realize an image processing apparatus that allows a user to freely and easily set a range for image processing by multi-touch. It is in.

  In order to solve the above-described problem, the image processing apparatus of the present invention includes a position detection unit that detects the positions of the two touched locations when an object touches two different locations on the display screen that displays the image. The distance calculation means for calculating the distance between the two positions detected by the position detection means, and the size of the processing target area to be subjected to image processing to a size corresponding to the distance calculated by the distance calculation means And an area setting means for setting.

  According to the above configuration, when the user touches the fingertip at two different positions on the display screen, the image processing apparatus calculates the distance between the two touched positions and performs the image processing. Set the size according to the calculated distance.

  Therefore, the image processing apparatus has an effect that the user can freely and easily set the range for image processing by multi-touch.

  In order to solve the above-described problem, the image processing method of the present invention detects a position of the two touched positions when an object touches two different positions on a display screen for displaying an image. A distance calculating step for calculating a distance between the two positions detected in the step and the position detecting step, and a size of a processing target region to be subjected to image processing is calculated in the distance calculating step. And an area setting step for setting the size according to the distance.

  According to said structure, the image processing method of this invention has an effect similar to the image processing apparatus of this invention.

  In the image processing apparatus according to the aspect of the invention, it is preferable that the processing target area set by the area setting unit is an area for drawing a background color on the image.

  According to the above configuration, the image processing apparatus has an additional effect that the user can freely and easily set the range for drawing the background color in the image by multi-touch.

  The image processing apparatus of the present invention further includes display control means for displaying an icon having a size corresponding to the distance calculated by the distance calculation means on the display screen, and the region setting means is displayed by the display control means. It is desirable to draw the background color in the area where the icon is swept.

  According to said structure, an image processing apparatus has the further effect that a user can visually recognize the area | region which draws a background color with an icon.

  In the image processing apparatus of the present invention, the display control unit may display the icon so that the two positions detected by the position detection unit are included on a boundary line of a region where the icon is displayed. desirable.

  According to the above configuration, the image processing apparatus can allow the user to designate an area for drawing the background color as if holding a blackboard eraser or eraser.

  In the image processing apparatus of the present invention, it is preferable that the display control unit changes the size of the icon being displayed to a size corresponding to the distance calculated by the distance calculation unit after the icon is displayed.

  According to the above configuration, the image processing apparatus changes the size of the area to be subjected to image processing according to the changed icon size.

  Therefore, the image processing apparatus has an additional effect that the user can easily reset the size of the area to be subjected to image processing.

  In the image processing apparatus of the present invention, the icon has a rectangular shape, and the display control means changes the size of the icon being displayed to each long side or each short side of the icon being displayed. It is desirable that the contact is limited to when the position detecting means detects the contact.

  According to said structure, there exists the further effect that an image processing apparatus can prevent that a user resets the size of the area | region which performs image processing carelessly.

  The image processing apparatus of the present invention preferably further comprises display control means for displaying an object representing the distance calculated by the distance calculation means on the display screen. Here, the object may be, for example, double-ended arrows indicating two positions detected by the position detecting means, or may represent the distance as a numerical value.

  According to the above configuration, the image processing apparatus has a further effect that the user who wants to set the size of the area to be subjected to image processing can grasp the size of the area to be set.

  An image processing apparatus according to the present invention includes an instruction receiving unit that receives an instruction to perform the image processing from a user, and the position detecting unit receives the instruction from the instruction receiving unit until a predetermined time elapses. When the two positions are not detected, it is preferable that the area setting unit sets the size of the processing target area to a predetermined size.

  According to the above configuration, the image processing apparatus has a further effect that, for a user who often sets the size of the area to be subjected to image processing to a specified size, it is possible to reduce the trouble of setting the area size by multi-touch. Play.

  In the image processing apparatus of the present invention, it is desirable that the area setting unit sets the size of the processing target area so that the area setting unit is proportional to the square of the distance calculated by the distance calculation unit.

  According to the above configuration, the image processing apparatus sets a processing target area having a size proportional to the square of the distance between the two positions when the user touches the fingertip at two positions on the display screen. . Here, when the size of an object represented in two dimensions is specified by a one-dimensional quantity, the size of the object is generally proportional to the square of the one-dimensional quantity.

  Therefore, there is an additional effect that the user can set the size of the processing target area to be subjected to image processing in a manner that is straightforward to the user's sense.

  In the image processing apparatus of the present invention, when the position detection unit detects two positions, and further detects contact with two positions different from the two positions by at least one position, the area The setting means rotates the processing target region by an angle obtained by subtracting the contact angle of the straight line connecting the two previously detected positions from the contact angle of the straight line connecting the two positions detected later. It is desirable.

  According to said structure, an image processing apparatus has the further effect that a user can rotate and move the process target area | region which should perform an image process easily.

  The present invention may be realized as a display device including the display screen in the image processing device.

  The image processing apparatus may be realized by a computer. In this case, an image processing program for realizing the image processing apparatus in the computer by operating the computer as each of the above means and a computer-readable recording medium on which the image processing program is recorded also fall within the scope of the present invention.

  As described above, the image processing apparatus of the present invention has an effect that a user can freely and easily set a range for performing image processing by multi-touch.

(A) is the block diagram which showed the structure of the display apparatus which concerns on one Embodiment of the image processing apparatus of this invention, (b) is the figure which showed the external appearance of the display apparatus. It is the figure which showed the information regarding each command currently recorded on the command memory | storage part of the display apparatus as a table | surface. (A) and (b) are the figures which showed the example of the gesture of the eraser command. (A) and (b) are the figures which showed that the length of the size designation | designated arrow could be changed by pinch in and pinch out. (A) is the figure which showed the external appearance of the blackboard erase icon, (b) is a figure showing the function of the blackboard erase icon. (A) is a diagram showing that the display angle of the blackboard erase icon can be changed, and (b) is a diagram showing that the size of the blackboard erase icon can be changed. It is a flowchart which shows the first half part of the operation | movement regarding the eraser command of a display apparatus. It is a flowchart which shows the second half part of the operation | movement regarding the eraser command of a display apparatus. (A) (b) is the figure which showed the relationship between the contact position of the fingertip to the touchscreen type display part of a display apparatus, and the position of the size designation | designated arrow displayed by a compass command, (c) is a contact. It is the figure which showed the relationship between a position and the position of the circular arc to draw.

  An image processing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a block diagram illustrating a schematic configuration of the display device 100 of the present embodiment, and FIG. 1B is a diagram illustrating an appearance of the display device 100.

  As shown in FIG. 1B, the display device 100 according to this embodiment includes a touch panel display unit 10. The touch panel of the touch panel display unit 10 supports multi-touch. That is, the display device 100 can detect the position of two points when a finger or the like (target object) contacts two different points on the display screen at the same time.

  In addition, the display device 100 can perform image processing according to various pre-registered commands on a displayed image (hereinafter referred to as “target image”). A command designation can be received via the display unit 10.

  Hereinafter, the configuration of the display device 100 will be described with reference to FIG.

(Configuration of display device 100)
As illustrated in FIG. 1A, the display device 100 includes a touch panel display unit 10, a control unit 20, and a storage unit 30.

  The touch panel display unit 10 includes a display unit 11 and a touch panel 12.

  The display unit 11 is a display screen that displays a target image. In addition, while the finger or the like is in contact with the display unit 11, the touch panel 12 continuously detects the contacted position and outputs position information indicating the position to the control unit 20.

  The control unit 20 includes an input detection unit 21, a display control unit 22, and a time measurement unit 23.

  The input detection unit 21 detects the presence or absence of contact with the touch panel and the coordinates of the contacted position based on the position information from the touch panel display unit 10. Further, the input detection unit 21 can detect that a specific command has been designated by the user by continuously detecting coordinates. The input detection unit 21 includes a contact detection unit 21a, a position detection unit 21b, a command detection unit 21c, and a size / angle detection unit 21d.

  The display control unit 22 controls display of the target image on the display unit 11, and includes a position determination unit 22a, an icon display unit 22b, and an image processing unit 22c. The display control unit 22 can display the target image on the entire display screen of the display unit 11 or display it on a part of the display screen.

  The time measurement unit 23 measures the elapsed time from when the specific state is reached. This measurement is performed until the specific state is not maintained or until a predetermined time elapses. Note that “when a specific state is reached” includes when the position detection unit 21b no longer detects position coordinates or when the position detection unit 21b detects the same position coordinates continuously. It is done.

  The storage unit 30 is a memory that records various types of information, and includes an input coordinate storage unit 31, a graphic drawing information storage unit 32, and a command storage unit 33.

  Hereinafter, the main configuration of the input detection unit 21, the display control unit 22, and the storage unit 30 will be described.

(Input detection unit 21)
The contact detection unit 21a detects that there is a touch on the touch panel when the position information is transmitted from the touch panel 12, and detects that there is no contact on the touch panel when the position information is not transmitted from the touch panel 12. To do.

  Based on the position information transmitted from the touch panel 12, the position detection unit 21 b determines whether the detected contact is a contact on the target image when the contact detection unit 21 a detects that there is a contact with the touch panel 12. When it is determined that the contact is on the target image, position coordinates indicating a contact position on the target image (that is, when the upper left of the target image is the origin) are detected based on the position information. The position detection unit 21b can detect two points of this position coordinate at the same time.

  The command detection unit 21c continuously monitors the position coordinates detected by the position detection unit 21b by referring to the input coordinate storage unit 31, and the shape of the trajectory connecting the position coordinates is registered in the command storage unit 33 in advance. Detects matching with a command trajectory (gesture). Thereby, the command detection unit 21c detects that a command corresponding to the gesture that has been detected to be matched has been designated.

  The size / angle detection unit 21d calculates the distance between the detected two points when the position detection unit 21b detects two position coordinates at the same time.

(Display control unit 22)
The position determination unit 22a determines the position coordinates detected by the position detection unit 21b when the elapsed time measured by the time measurement unit 23 has reached a predetermined time as the coordinates to be referred to by the icon display unit 22b and the image processing unit 22c. To do.

  The icon display unit 22b displays the icon of the size determined by the size determination unit 21d so that the position coordinates of the two points determined by the position determination unit 22a are included on the boundary line of the area where the icon is displayed. For example, when an eraser command is designated, a rectangular blackboard eraser icon is displayed in which a line segment connecting two points determined by the image processing unit 22c and the position determining unit 22a is one side, and the other side is twice as long. .

  The icon display unit 22b displays not only icons but also size designation arrows (objects) for allowing the user to select the icon size. The user can select the size of the icon by touching the two points indicated by the size designation arrow and performing pinch-in and pinch-out, but the icon display unit 22b has two points that are in contact during pinch-in and pinch-out. The size specification arrow is redrawn to point to.

  The image processing unit 22c determines a range (processing target region) to be subjected to image processing in the target image based on the position coordinates determined by the position determination unit 22a, and performs image processing on the range. This range is a range corresponding to the length of the line segment connecting the two points determined by the position determination unit 22a. For example, when an eraser command is designated, the image processing unit 22c makes the range to be erased in the target image the same as the range in which the blackboard erase icon is displayed.

(Storage unit 30)
The input coordinate storage unit 31 is a storage area that holds the position coordinates detected by the position detection unit 21b for a certain period.

  The graphic drawing information storage unit 32 is a storage area that holds image information of the target image.

  The command storage unit 33 is a storage area that holds gesture information and the default size of an icon to be displayed in association with each command. As shown in FIG. 2, an eraser command, a ruler command, a compass command (not shown), and the like are registered in the command storage unit 33.

  The command storage unit 33 is configured to record the coordinates of the center position, display size, and display angle of the icon that the icon display unit 22b actually displays for each command. Here, the display angle is defined as an angle formed by a line segment connecting two points detected by the position detection unit 21b with the vertical axis direction of the display screen.

  As shown in FIG. 5B, the eraser command is a command for erasing (making the background color) the range where the blackboard erase icon in the target image has been swept. The ruler command is a command for drawing a straight line between two selected points on the ruler, and the compass command is a command for drawing a curve on an arc.

  Next, the operation of the display device 100 when the user touches the target image on the touch panel display unit 10 with reference to FIGS. 7 and 8 will be described. 7 and 8 are flowcharts showing the operation of the display device 100. FIG. In the following, the operation when the user designates an eraser command and erases the target image will be mainly described.

(Operation of Display Device 100)
Initially, the contact detection part 21a detects the presence or absence of the contact to the touchscreen type display part 10 (step S1). When contact is detected (YES in step S1), the position detection unit 21b detects position coordinates indicating the contact position on the target image (step S2) and records them in the input coordinate storage unit 31. On the other hand, when it is detected that there is no contact (NO in step S1), the process returns to step S1.

  After step S2, the command detection unit 21c is recorded in the command storage unit 33 and a plurality of position coordinates recorded in the input coordinate storage unit 31 detected in the process of S2 within a certain period until now. Based on the gesture information, it is determined whether or not a command designation is detected (step S3). For example, when the user moves his / her finger so as to draw a trajectory as shown in FIG. 3A on the target image displayed on the touch panel display unit 10 within the predetermined period, the command detection unit 21c Then, it is detected that the locus connecting the plurality of pieces of position information recorded in the input coordinate storage unit 31 matches the gesture of the eraser command recorded in the command storage unit 33. In this case, the command detector 21c detects the designation of the eraser command.

  When it is determined that the command designation has not been detected (NO in step S3), the image processing unit 22c that has received the notification from the command detection unit 21c draws a point at the detected position coordinate, and returns to step S1. .

  On the other hand, when it is determined that the designation of the command is detected (YES in step S3), the process proceeds to step S5. If the input command is a command other than the eraser command (NO in step S5), control unit 20 executes other command processing (step S6) and returns to step S1.

  If the input command is an eraser command (YES in step S5), the process proceeds to step S7.

  The icon display unit 22b that receives the notification from the command detection unit 21c sets the default size (specified size) 30x60 (short side: 30 dots, long side: 60 dots) related to the eraser command recorded in the command storage unit 33. Referring to FIG. 4A or FIG. 4B, a double-sided arrow having the short side length (hereinafter referred to as a “size designation arrow”) as shown on the left side of FIG. Display (step S7). Moreover, the time measurement part 23 measures the elapsed time from the time of the process of S7. As shown in FIGS. 4A and 4B, the length of the size designation arrow can be changed by pinching in and out with one hand or both hands.

  The contact detection unit 21a detects the presence or absence of contact with the touch panel display unit 10 (step S8). When the contact is detected (YES in step S8), the position detection unit 21b that receives the notification from the contact detection unit 21a detects the position coordinates indicating the contact position on the target image (step S10). When the position detection unit 21b detects only one point in step S10, or when the size / angle detection unit 21d determines that the detected position coordinates of the two points are not coordinates indicating both ends of the size designation arrow (in step S11) NO), the process proceeds to S9. Also, when the contact detection unit 21a detects that there is no contact with the touch panel display unit 10 (NO in step S8), the process proceeds to S9.

  In step S9, the time measuring unit 23 determines whether or not the elapsed time has reached a predetermined time. If it is determined that it has not been reached (NO in S9), the process returns to S8. On the other hand, when it is determined that the size has been reached (YES in S9), the size / angle detection unit 21d refers to the default size of the blackboard erase icon recorded in the command storage unit 33, and stores the blackboard eraser in the command storage unit 33. “30 × 60” is displayed as the icon display size, “0 degree” is displayed as the display angle, and “(X−A, Y + A / 2)” is recorded as the center position (step S12). Here, (X, Y) is the coordinates of the upper end of the size designation arrow.

  On the other hand, when the position detection unit 21b detects two points in step S10 and the size / angle detection unit 21d determines that the position coordinates of the two detected points are coordinates indicating both ends of the size designation arrow (step S11). In step S13, the size / angle detection unit 21d calculates the distance between the two points detected by the position detection unit 21b. Then, the size / angle detection unit 21d determines whether or not the detected distance between the two points has been changed (step S14).

  If it is determined that the distance has been changed (YES in step S14), the icon display unit 22b that has received the notification changes the length of the size designation arrow to indicate the two points detected in the process of step S10. (Step S15). Thereafter, the process returns to step S8. The time measurement unit 23 starts measuring elapsed time at the timing when the process of S15 is performed.

  If it is determined that the distance has not been changed (NO in step S14), the process proceeds to step S16. If the time after the distance between the two detected points becomes constant is less than the predetermined time (NO in step S16), the process returns to step S13, and if the predetermined time is reached (YES in step S16). The process proceeds to step S17. In order to operate in this way, the time measurement unit 23 has elapsed since the time when the size / angle detection unit 21d has determined that the distance between the two detected points has not been changed twice in succession in step S14. Start measuring time. When the time measurement unit 23 determines that the elapsed time during measurement has reached the predetermined time, the time measurement unit 23 proceeds to the process of step S17.

  In step S17, the size / angle detection unit 21d records “Ax2A” as the display size of the blackboard erase icon and “0 degrees” as the display angle in the command storage unit 33. Here, A is the distance between the two points last calculated by the size / angle detector 21d. The size / angle detection unit 21 d records “(X−A, Y + A / 2)” as the center position in the command storage unit 33. Then, the size / angle detection unit 21d notifies the icon display unit 22b to display the blackboard erase icon.

  In step S18, the icon display unit 22b that has received the notification refers to the values of the center position, display size, and display angle of the blackboard eraser icon recorded in the command storage unit 33, and based on these values. A blackboard erase icon is displayed on the display unit 11. As is clear from the description of step S17, the blackboard erase icon displayed has a ratio of the long side to the short side always 2 (constant) as shown in FIG. It is proportional to the square of the distance between points. If YES is determined in step S9 and YES is not determined in step S11, the size of the blackboard eraser icon to be displayed is clearly the default size (specified size). .

  The above is the operation of the display device 100 until the blackboard erase icon is displayed. From now on, the rotation of the blackboard erase icon (change of the display angle) as shown in FIG. 6A and the display of FIG. The operation of the display device 100 will be described focusing on the processing related to the size change of the blackboard erase icon as shown. Note that, as shown in FIG. 6A, the center of rotation (the black circle in the figure) coincides with the center of the blackboard erase icon. Further, as shown in FIG. 6B, the size is changed by pinching in and pinching out by bringing a finger into contact with one short side and the other short side of the blackboard erase icon.

  In step S <b> 19, the contact detection unit 21 a detects the presence or absence of contact with the touch panel display unit 10. Note that when the contact is not continuously detected twice in step S19, the time measuring unit 23 starts measuring the elapsed time. When it is detected that no contact has occurred (NO in step S19), in step S20, time measuring unit 23 determines whether or not the elapsed time has reached a predetermined time. If it is determined that it has not been reached (NO in S20), the process returns to S19. On the other hand, when it is determined that it has been reached (YES in S20), the icon display unit 22b erases the blackboard eraser icon, and information on the eraser command held by the command storage unit 33 (center position, display size, and The display angle information) is deleted and the process is terminated.

  On the other hand, when contact with the touch panel type display unit 10 is detected (YES in step S19), the position detection unit 21b that has received the notification from the contact detection unit 21a indicates the position coordinates indicating the contact position on the target image. It detects (step S21). If the position detection unit 21b detects the position coordinates of two points in step S21 (YES in step S22), the process returns to step S19, and if only one position coordinate is detected (NO in step S22), the size / angle detection is performed. The unit 21d determines whether or not the position coordinates of the two points detected by the position detection unit 21b are at both ends of the icon (step S23). Specifically, the size / angle detection unit 21d detects “detected” when one position coordinate is on one short side of the blackboard erase icon and the other position coordinate is on the other short side. It is determined that the position coordinates are at both ends of the icon. Otherwise, it is determined that the detected position coordinates are not at both ends of the icon.

  When it is determined that “the position coordinates of the two points are at both ends of the icon” (YES in step S23), the size / angle detection unit 21d detects the distance of the long-side direction component between the two points detected by the position detection unit 21b. Is calculated (step S30). Here, the “distance of the long side direction component between two points” is the i of a vector connecting two points determined when the coordinate axis parallel to the long side is the i axis and the coordinate axis parallel to the short side is the j axis. The absolute value of the component.

  Thereafter, the size / angle detection unit 21d updates the display size of the blackboard erase icon recorded in the command storage unit 33 to “A′x2A ′” (step S31). Here, 2A 'is the distance of the long side direction component between the two points calculated by the size / angle detection unit 21d in the immediately preceding step S30. When the process of step S31 ends, the process proceeds to step S32.

  On the other hand, if it is determined in step S23 that “the position coordinates of the two points are not at both ends of the icon”, the size / angle detection unit 21d determines the slope m of the straight line connecting the position coordinates of the two points detected by the position detection unit 21b. Based on the above, the angle θ = arctan (m) * 2 / π (0 ≦ θ <180 °, hereinafter referred to as “contact angle”) of the straight line with respect to the horizontal right direction of the target image is calculated (step S24). . Then, the size / angle detection unit 21d determines whether or not the contact angle has been changed (step S25).

  When it is determined that the contact angle has been changed (YES in S25), the size / angle detection unit 21d records a value obtained by subtracting 90 ° from the contact angle detected in step S24 as a display angle in the command storage unit 33. (Step S26). For example, when it is detected that the contact angle has been changed from 90 ° to 100 °, the display angle is set to 10 ° as shown in FIG. After step S26, the process proceeds to step S29.

  When it is determined that the contact angle has not been changed (NO in S25), the size / angle detection unit 21d calculates the distance between the two points detected by the position detection unit 21b in the immediately preceding step S21, and is being displayed. It is determined whether or not it matches the length of the short side of the blackboard erase icon (step S27). That is, referring to the value recorded as the display size in the command storage unit 33, the distance between the two points detected by the position detection unit 21b in the immediately preceding step S21 matches the length of the short side indicated by the referenced value. It is determined whether or not to do. For example, as shown in FIG. 2B, when the display size is “40 × 80”, the size / angle detection unit 21d determines whether the distance between the two points detected by the position detection unit 21b is 40 or not. Will do. If it is determined that the length does not match the length of the short side (NO in step S27), the process returns to step S19.

  On the other hand, if it is determined that the distance is equal to the short-side distance (YES in step S27), the size / angle detection unit 21d detects the center position based on the position coordinates of the two points detected in the immediately preceding step S21. This is performed (step S28). Specifically, the processing is performed as follows.

  That is, it is determined whether or not the position coordinates of the two points detected in the immediately preceding step S21 are on the long side of the blackboard eraser icon being displayed. The value of the recorded center position is set as the center position to be detected. Here, whether or not the position coordinates of the two points are on the long side can be determined by referring to the respective values of the center position, display size, and display angle recorded in the command storage unit 33. Is clear.

  If the position coordinates of the two points are not on the long side, the line segment connecting the position coordinates of the two points detected in the immediately preceding step S21 connects the position coordinates of the two points that were the targets of the previous step S28. The distance (a, b) translated from the line segment is calculated. Then, the size / angle detection unit 21d updates the value of the center position recorded in the command storage unit 33 by adding a to the x component and adding b to the y component.

  The specific processing in step S28 has been described above, but thereafter, the icon function is executed (step S29). That is, the image processing unit 22c refers to each value of the center position, display size, and display angle recorded in the command storage unit 33. Then, the image processing unit 22c records, in the graphic drawing information storage unit 32, image processing for erasing (making the background color) a range determined according to these values (a range for drawing the blackboard erase icon in the next step S32). To the target image.

  In step S32, the icon display unit 22b refers to the center position, display size, and display angle values recorded in the command storage unit 33, and displays the blackboard erase icon in a range determined based on these values. Return to step S19. Specifically, in the example of FIG. 2B, the icon display unit 22b displays the blackboard eraser icon at a display angle of 10 °. If it is detected in step S25 that the contact angle has been changed from 90 ° to 100 °, the blackboard eraser icon is displayed at a display angle of 0 ° immediately before step S32. That is, the blackboard erase icon is rotated by an angle of 10 ° obtained by subtracting the contact angle of 90 ° before the change from the contact angle of 100 ° after the change by the process of step S32.

  Further, as can be seen from step S31 and step S32, the image processing unit 22c erases the range where the blackboard erase icon is swept.

(Advantages of the display device 100)
As described above, in the display device 100, when the eraser command is designated, when the finger or the like touches two different points on the touch panel type display unit 10, the position detection unit 21b indicates the position coordinates of the two touched points. Then, the size / angle detector 21d calculates the distance A between the two points. Then, the image processing unit 22c erases the area where the blackboard eraser icon having the short side length A and the long side length 2A is displayed by the icon display unit 22b (drawn in the background color). Set as an area.

  Therefore, the user can freely and easily set the range in which the background color is drawn on the target image by multi-touch.

(Compass command)
Here, the function of the compass command will be briefly described.

  The compass command is a command for causing the display device 100 to draw a curve on an arc as described above. The user designates a compass command, touches the fingertip of two fingers on the target image displayed on the touch panel display unit 10, and touches the other fingertip as described above while bringing one fingertip into contact with the same position. By moving the angle so as to change, it is possible to cause the display device 100 to draw a curve on an arc. In other words, it is possible to cause the display device 100 to draw an accurate arc without moving the other fingertip so as to draw an accurate arc.

  Further, before the display device 100 draws an arc (that is, before starting to move the other fingertip so that the contact angle changes), the touching fingertip is moved on a straight line connecting the fingertips, The center and radius of the arc to be drawn can be specified.

  Hereinafter, the operation of the display device 100 when the compass command is designated will be described with reference to FIG. FIG. 9A and FIG. 9B are diagrams showing the relationship between the position of the fingertip touching the touch panel display 10 and the position of the size designation arrow displayed by the compass command. FIG. 9C is a diagram showing the relationship between the contact position and the position of the arc to be drawn.

  When detecting the designation of the compass command, the time measuring unit 23 starts measuring the elapsed time. When the elapsed time reaches a predetermined time, the operation relating to the compass command is canceled, and when the position detection unit 21b detects two position coordinates before the elapsed time reaches the predetermined time, the following processing is performed.

  That is, as shown in FIG. 9A, the icon display unit 22b displays a size designation arrow indicating the position coordinates (X1, Y1) and (X2, Y2) of the two points on the display unit 11, and between the two points. Is recorded in the command storage unit 33.

  Then, when the position detection unit 21b detects the position coordinates of two points (point Q, point R) next, the icon display unit 22b has the position coordinates of the two points (X1, Y1), (X2 , Y2). As illustrated in FIG. 9B, when the icon display unit 22b determines that the position coordinates of the two points are both on the straight line L, the size designation arrow indicates the position coordinates of the two points that are the objects of the determination. In this manner, the size designation arrow is redrawn and the value of the distance r between the two points is updated. The determination process, the redrawing process, and the update process are performed until it is determined in the determination process that one or more position coordinates out of the two position coordinates are not on the straight line L.

  On the other hand, when it is determined in the determination process that one or more position coordinates are not on the straight line L, one of the two point (P, Q) position coordinates (determination target coordinates) is on the previous straight line L. It is determined whether or not it coincides with one of the position coordinates (determined target coordinates) of the two points determined to be in the position. When it is determined that they do not match, the operation related to the compass command is canceled, and when it is determined that they match (for example, the user moves one fingertip to the same position while moving the other fingertip so that the contact angle changes). In such a case, the following arc drawing process is performed.

  The image processing unit 22c is an arc on a circumference having a radius r centered on the position coordinate of one of the coincident points (point Q), and an intersection S where the half line HL from the point Q to the point P intersects the arc. A subarc connecting the other position coordinates R of the determination target coordinates is displayed on the display unit 11. This display process will be described more specifically with reference to FIG. 9C.

That is, the image processing unit 22c calculates the angle θ ₁ = arctan (Y5-Y3 / X5-X3) for the point Q (X3, Y3) and the point P (X5, Y5) of the determination target coordinates, and the point S (X6 , Y6) = (r * cos θ ₁ + X3, r * sin θ ₁ + Y3). Then, the image processing unit 22c draws the inferior arc portion of the two arcs (dominant arc and inferior arc) determined by the point RQS with the drawing color.

The above arc drawing process is repeated as long as the position detection unit 21b detects the position coordinates of two points including the point Q. That is, when the position detection unit 21b further detects the point Q (X3, Y3) and the point T (X7, Y7), the angle θ with respect to the point Q (X3, Y3) and the point T (X7, Y7) of the determination target coordinates ₂ = arctan (Y7−Y3 / X7−X3) is calculated, and point U (X8, Y8) = (r * cos θ ₂ + X3, r * sin θ ₂ + Y3) is calculated. Then, the image processing unit 22c draws the inferior arc portion determined by the point SQU with the drawing color.

  As described above, in the display device 100, when a compass command is designated, when a finger or the like touches two different points (point Q, point R) on the touch panel display unit 10, the position coordinates of the two points touched are displayed. The position detection unit 21b detects, and the size / angle detection unit 21d calculates the distance r between the two points. When the user touches the point Q and the point P with a finger or the like, the image processing unit 22c sets a circular arc region having a radius of r as a drawing color drawing region.

  Therefore, the user can freely and easily set the range in which the arc is drawn on the target image by multi-touch.

(Additional notes)
Although the display device 100 includes the storage unit 30, the display device 100 does not necessarily include the storage unit 30. That is, the storage unit 30 may be realized by an external medium loaded in the display device 100.

  In the above embodiment, the image processing apparatus of the present invention is realized as the display apparatus 100. However, the image processing apparatus of the present invention is not limited to this. That is, the image processing apparatus may be realized as an information processing apparatus (not shown) such as a PC that includes the control unit 20 but does not include the touch panel display unit 10. In this case, the present invention is implemented by separately connecting a touch panel display device to the information processing device.

  The gesture for designating the eraser command is not limited to the gesture shown in FIG. 3A, but may be a cross-shaped gesture as shown in FIG.

  In the above embodiment, the size / angle detection unit 21d determines that “the detected position coordinates are at both ends of the icon” because one position coordinate is on one short side (end part) of the blackboard eraser icon. In addition, it is assumed that the other position coordinate is on the other short side (end), but the present invention is not limited to this. That is, when one position coordinate is on one long side of the blackboard erase icon and the other position coordinate is on the other long side, it is determined that “the detected position coordinates are at both ends of the icon”. You may make it do. If determined in this way, in step S30, the size / angle detector 21d calculates the distance of the short side direction component between the two points detected by the position detector 21b (step S30). Here, the “distance of the short-side direction component between two points” is the vector j connecting two points determined when the coordinate axis parallel to the long side is the i-axis and the coordinate axis parallel to the short side is the j-axis. The absolute value of the component.

  In addition, although the determination process such as whether the position coordinates of the two points are at both ends of the size designation arrow, the both ends of the icon, or on the straight line L has been described, the determination process includes the position coordinates of the two points. It is not necessary to be based on whether it is in the position (both ends of the size designation arrow, both ends of the icon, straight line L, etc.). That is, the determination process may be performed based on whether the position coordinates of the two points are within a specified range or outside the specified range from these positions.

  In the above embodiment, as a specific example of the icon defined for each command, the blackboard erase icon for the eraser command has been described and described as having a rectangular shape, but the shape of the icon may be any shape.

  Furthermore, in the above-described embodiment, the image processing unit 22c erases the same area as the area where the blackboard erase icon is displayed, but this need not necessarily be the case. That is, the size of the area where the blackboard erase icon is displayed and the size of the area to be erased do not necessarily match. Moreover, the area | region where a blackboard eraser icon is displayed, and the area | region where an icon is displayed should just overlap at least partially.

  In addition, although a size designation arrow is shown as an example of an object to be displayed when contact with two points on the display screen is detected, other objects (for example, the distance between the two points is expressed as a numerical value instead of the size designation arrow) Object).

(Program, recording medium)
Finally, the display device 100 and the control unit 20 of the information processing device may be configured by hardware logic, or may be realized by software using a CPU as follows.

  In other words, the display device 100 and the information processing device include a CPU (central processing unit) that executes instructions of a control program that realizes each function, a ROM (read only memory) that stores the program, and a RAM (random) that expands the program. access memory), a storage device (recording medium) such as a memory for storing the program and various data. The object of the present invention is to record the program code (execution format program, intermediate code program, source program) of the control program for the display device 100 or the information processing device, which is software for realizing the functions described above, so that it can be read by a computer. This can also be achieved by supplying the recording medium to the display device 100 or the information processing apparatus, and the computer (or CPU or MPU) reading and executing the program code recorded on the recording medium.

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Further, the display device 100 and the information processing device may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Further, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), IEEE802.11 radio, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  The image processing apparatus of the present invention can be suitably applied to a large information display.

10 Touch panel display (display screen)
DESCRIPTION OF SYMBOLS 11 Display part 12 Touch panel 20 Control part 21 Input detection part 21a Contact detection part 21b Position detection part (position detection means)
21c Command detector (instruction receiving means)
21d Size / angle detector (distance calculation means)
22 display control unit 22a position determination unit 22b icon display unit (display control means)
22c Image processing unit (region setting means)
30 storage unit 100 display device (image processing device)

Claims (14)

A position detecting means for detecting the positions of the two places in contact when the object touches two different places on the display screen for displaying an image;
Distance calculating means for calculating a distance between the two positions detected by the position detecting means;
An image processing apparatus comprising: an area setting unit that sets a size of a processing target area to be subjected to image processing to a size corresponding to the distance calculated by the distance calculation unit.   The image processing apparatus according to claim 1, wherein the processing target area set by the area setting unit is an area for drawing a background color on the image. Display control means for displaying an icon of a size corresponding to the distance calculated by the distance calculation means on the display screen;
The image processing apparatus according to claim 1, wherein the area setting unit draws a background color in an area where the icon displayed by the display control unit is swept.   The said display control means displays the said icon so that the position of the said 2 places detected by the said position detection means may be included on the boundary line of the area | region where the said icon is displayed. Image processing apparatus.   The image processing according to claim 3, wherein the display control unit changes the size of the icon being displayed to a size corresponding to the distance calculated by the distance calculation unit after the icon is displayed. apparatus. The shape of the icon is a rectangle,
The display control means changes the size of the icon being displayed only when the position detection means detects contact with each long side or each short side of the icon being displayed. The image processing apparatus according to claim 5, wherein:   4. The image processing apparatus according to claim 1, further comprising display control means for displaying an object representing the distance calculated by the distance calculation means on the display screen. An instruction receiving means for receiving an instruction to perform the image processing from a user;
If the position detection unit does not detect the two positions before the specified time elapses after the instruction receiving unit receives the instruction, the region setting unit defines the size of the processing target region. The image processing apparatus according to claim 1, wherein the image processing apparatus is set to a size of 1.   The said area setting means sets the size of the said process target area | region so that it may be proportional to the square of the distance which the said distance calculation means calculated, The any one of Claim 1 to 8 characterized by the above-mentioned. Image processing device.   After the position detecting means detects two positions, and further detects contact with two positions different from the two positions by at least one place, the area setting means is detected later. 2. The region to be processed is rotated by an angle obtained by subtracting a contact angle of a straight line connecting two previously detected positions from a contact angle of a straight line connecting two positions. The image processing apparatus according to any one of claims 1 to 9.   A display device comprising the image processing device according to claim 1, wherein the display screen is provided. A position detecting step for detecting the positions of the two places that are in contact when the object comes into contact with two different positions on the display screen for displaying an image;
A distance calculating step of calculating a distance between the two positions detected in the position detecting step;
And a region setting step of setting a size of a processing target region to be subjected to image processing to a size corresponding to the distance calculated in the distance calculation step.   A program for operating the image processing apparatus according to any one of claims 1 to 10, wherein the image processing program causes a computer to function as each of the means.   A computer-readable recording medium on which the image processing program according to claim 13 is recorded.

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