JP5683375B2 - Display device and display program - Google Patents

Description

  The present invention relates to a display device and a display program capable of displaying on a display panel a character input by handwriting on a touch panel formed integrally with the display panel.

  Electronic blackboard systems, personal computers, mobile phone terminals, electronic notebooks, etc. include handwritten characters that include a display panel such as a liquid crystal display and a touch panel formed integrally with the display panel. Is provided. In the display device, a handwriting input based on input coordinate data of the handwriting input is displayed on the display panel by inputting characters by handwriting through an input operation on the touch panel.

  In such a display device, in order to make it easy to read a character string input by handwriting, a technique for correcting the position of the character so that the input character is aligned in a straight line has been proposed.

  For example, Japanese Patent Application Laid-Open No. 2004-228561 has a technique for displaying a guide line that is a guideline for a character input position in advance and correcting the position of the character so that a handwritten input character string is aligned along the guide line. It is disclosed. Further, in Patent Document 2, for a character string that has been input by handwriting, a line indicating a continuous connection of character strings arranged in the same direction is cut out, and a character is cut out from the cut out line. A technique for correcting the position of a character so that the character is aligned on a reference line is disclosed.

JP-A-8-227338 JP-A-6-4206

  However, the standard for character position correction for aligning handwritten characters in a straight line is a guide line displayed in advance in the technique disclosed in Patent Document 1, and in the technique disclosed in Patent Document 2. Since the reference line is based on the arrangement position of the input characters, the handwritten input characters cannot be displayed in a straight line along the direction desired by the user.

  Therefore, an object of the present invention is to display a handwritten input character that can be displayed in a straight line along the direction desired by the user, and to make the handwritten input character easier to read. Is to provide a program.

The present invention has an input surface for inputting by hand, and outputs coordinate data representing the position of a point designated by an input operation on the input surface;
Based on the coordinate data output from the input unit, a display unit that displays a locus of handwriting input to the input surface;
When two points satisfying a predetermined condition are instructed by an input operation on the input surface, the two points are set as reference points, and a line segment connecting the two reference points based on the coordinate data corresponding to the reference points. A reference line generation unit that generates a reference line that is a normal line;
After the reference line generation unit generates a reference line, a character is recognized from the coordinate data corresponding to the locus of the handwritten input output from the input unit by being input by handwriting by an input operation on the input surface. A character extraction unit that extracts coordinate data for each character;
Based on the coordinate data for each character extracted by the character extraction unit, character correction in a direction perpendicular to the reference line is performed so that the characters input by handwriting are aligned along the reference line, A display device comprising: a vertical character position correction unit that displays a position-corrected character on the display unit.

  In the display device of the present invention, the reference line generation unit generates the reference line so as to extend from the midpoint of a line segment connecting two reference points to the peripheral edge of the display unit, and the generated reference line It displays on the said display part, It is characterized by the above-mentioned.

The display device of the present invention sets the circumscribing rectangle coordinate data of each character based on the coordinate data for each character extracted by the character extracting unit, and circumscribes the circumscribing with respect to the reference line from the set circumscribing rectangle coordinate data. An inclination angle calculation unit for calculating an inclination angle of the rectangle;
A character inclination correction unit that rotates each character at an inclination angle calculated by the inclination angle calculation unit, corrects the inclination of each character with respect to the reference line, and displays the corrected character on the display unit; It is characterized by providing.

  Further, the display device according to the present invention may be arranged in a direction parallel to the reference line so that the interval between adjacent characters is a predetermined interval based on the coordinate data for each character extracted by the character extraction unit. It further includes a parallel-direction character position correction unit that performs character position correction and displays the position-corrected character on the display unit.

In addition, the display device of the present invention determines whether or not an input operation is performed on the input surface, and measures a waiting time for the input operation;
And a reference line erasing unit for erasing the reference line generated by the reference line generating unit when the standby time measured by the time measuring unit is equal to or longer than a predetermined time.

  According to another aspect of the present invention, there is provided a display program that causes a computer including an input unit and a display unit to function as the display device.

  According to the present invention, the display device is a device that displays the trajectory of the character based on the coordinate data of the handwritten input on the display unit by inputting the character by handwriting by a user input operation on the input unit. Furthermore, the display device includes a reference line generation unit, a character extraction unit, and a vertical character position correction unit.

  The reference line generation unit is output from the input unit by designating two reference points by a user input operation on the input surface prior to handwritten characters being input to the input surface of the input unit. Based on the coordinate data corresponding to the reference point, a reference line that is a normal line of the line segment connecting the two reference points is generated. For example, the reference line generation unit indicates two reference points with a finger of a hand attached when the user inputs handwritten characters on the input surface (or a left hand finger when the user inputs handwritten characters with the right hand). As a result, a reference line is generated. The reference line generated by the reference line generation unit is set by an input operation on the input surface of the user.

  The character extraction unit generates a character from coordinate data corresponding to a handwriting input locus output from the input unit by handwriting input by a user input operation on the input surface after the reference line generation unit generates the reference line. Recognize and extract coordinate data for each character. Then, the vertical direction character position correction unit is configured to make the direction perpendicular to the reference line so that the characters input by handwriting are aligned along the reference line based on the coordinate data for each character extracted by the character extraction unit. The position of the character is corrected, and the position-corrected character is displayed on the display unit.

  The display device of the present invention displays each character input by handwriting on the input surface along the reference line arbitrarily set by the user's input operation on the input surface and displays it on the display unit. Can be displayed in a straight line along the desired direction. This makes it easier for the user to read the handwritten characters.

  According to the invention, the reference line generation unit generates the reference line so as to extend from the midpoint of the line segment connecting the two reference points to the peripheral edge of the display unit, and displays the generated reference line on the display unit. Let Thereby, the user can visually recognize the reference line arbitrarily set by the input operation on the input surface on the display unit.

  According to the invention, the display device further includes an inclination angle calculation unit and a character inclination correction unit. The inclination angle calculation unit sets coordinate data of a circumscribed rectangle of each character based on the coordinate data for each character extracted by the character extraction unit, and the inclination angle of the circumscribed rectangle with respect to the reference line from the set coordinate data of the circumscribed rectangle Is calculated. The character tilt correction unit rotates each character at the tilt angle calculated by the tilt angle calculation unit, corrects the tilt of each character with respect to the reference line, and displays the tilt-corrected character on the display unit. As a result, it is possible to make it easier to read a handwritten character.

  According to the invention, the display device further includes a parallel character position correction unit. The parallel-direction character position correction unit is configured to detect characters in a direction parallel to the reference line so that the interval between adjacent characters is a predetermined interval based on the coordinate data for each character extracted by the character extraction unit. The position correction is performed, and the corrected character is displayed on the display unit. As a result, it is possible to make it easier to read a handwritten character.

  According to the invention, the display device further includes a time measuring unit and a reference line erasing unit. The timer unit determines whether or not an input operation is performed on the input surface, and measures a standby time for the input operation. Then, the reference line deleting unit deletes the reference line generated by the reference line generating unit when the standby time measured by the time measuring unit is equal to or longer than a predetermined time. Thus, the currently set reference line can be erased after elapse of a predetermined time. After the reference line is deleted in this way, the user can arbitrarily set a new reference line by performing an input operation for designating two new reference points on the input surface.

  According to the invention, the display program is a program for causing a computer including an input unit and a display unit to function as the display device. Such a display program can control, with software, display processing capable of displaying handwritten characters in a straight line along a direction desired by the user.

It is a block diagram which shows the structure of the display apparatus 1 which concerns on one Embodiment of this invention. 3 is a flowchart showing the operation of the display device 1. 4 is a flowchart showing an operation of reference point detection processing in the display device 1. 4 is a flowchart illustrating an operation of a reference line generation process in the display device 1. 6 is a diagram for explaining an operation of a reference line generation process in the display device 1. FIG. It is a flowchart which shows the procedure which calculates the inclination correction value of a reference line. 4 is a flowchart showing an operation of character extraction processing in the display device 1. It is a figure for demonstrating the character extraction result by a character extraction process. 4 is a flowchart showing an operation of vertical character position correction processing in the display device 1. FIG. 6 is a diagram for explaining an operation of vertical character position correction processing in the display device 1. 4 is a flowchart illustrating an operation of character inclination correction processing in the display device 1. 6 is a diagram for explaining an operation of a character inclination correction process in the display device 1. FIG. 6 is a flowchart showing an operation of a parallel character position correction process in the display device 1. 6 is a diagram for explaining an operation of a parallel character position correction process in the display device 1. FIG. 6 is a diagram for explaining an operation of a parallel character position correction process in the display device 1. FIG.

  FIG. 1 is a block diagram showing a configuration of a display device 1 according to an embodiment of the present invention. The display device 1 includes a transparent touch panel 2 as an input unit, a display panel 3 as a display unit, a touch panel data processing unit 4, a display data processing unit 5, a CPU 6 as control means, a memory, and the like. First storage means 7 and second storage means 8 composed of an HDD or the like. The display device 1 is a device in which a trajectory based on the handwritten input coordinate data is displayed on the display panel 3 by inputting characters by handwriting on the touch panel 2.

  In the display device 1 of the present embodiment, the touch panel 2 has an input surface in which orthogonal coordinates are set, and is laminated on the surface of the display panel 3 and is formed integrally with the display panel 3. This touch panel 2 is input by handwriting on the input surface and outputs coordinate data representing the input coordinate points. The touch panel data processing unit 4 is realized by a touch panel driver, and the display data processing unit 5 is realized by a display driver.

  As an input method other than the above, it is also possible to use a tablet such as an infrared ray cutting method that blocks infrared rays, a capacitive coupling method, an electromagnetic induction method, or a camera method.

  The CPU 6 includes a coordinate data acquisition unit 60, a trajectory display instruction unit 61, a reference line generation unit 62, a character extraction unit 63, an inclination angle calculation unit 64, a vertical character position correction unit 65, and a character inclination correction unit. 66, a parallel-direction character position correcting unit 67, a time measuring unit 68, and a reference line erasing unit 69.

  The coordinate data acquisition unit 60 acquires coordinate data output from the touch panel 2. The trajectory display instruction unit 61 transmits handwritten input coordinate data input to the touch panel 2 to the display panel 3 and causes the display panel 3 to display a handwritten input trajectory based on the coordinate data.

  When two points satisfying a predetermined condition are designated on the input surface of the touch panel 2, the reference line generation unit 62 uses the two points as reference points and coordinate data corresponding to the reference points output from the touch panel 2. Based on the above, a reference line that is a normal line of a line segment connecting two reference points is generated. For example, the reference line generation unit 62 uses the finger of the hand attached when the user inputs a handwritten character on the input surface (the finger of the left hand when the user inputs the handwritten character with the right hand) to set the two reference points. When instructed, a reference line is generated. The reference line generated by the reference line generation unit 62 is set by an input operation on the input surface of the user.

  Two points satisfying a predetermined condition are instructed that the standby time measured by the time measuring unit 68 has elapsed for a predetermined time or longer, and the time counting unit 68 resets the time measurement, then the input surface of the touch panel 2 is Indicates that two points are indicated.

  In the present embodiment, the reference line generation unit 62 generates a reference line so as to extend rightward from the midpoint of the line connecting the two reference points to the peripheral edge of the display panel 3, and displays the generated reference line. Display on panel 3. Thereby, the user can visually recognize the reference line arbitrarily set by the input operation on the input surface of the touch panel 2 on the display panel 3. Note that the direction in which the reference line extends can be set in advance. For example, when two reference points are designated with the finger of the right hand attached when the user inputs handwritten characters with the left hand, the reference line is used. The generation unit 62 generates a reference line so as to extend leftward from the midpoint of the line segment connecting the two reference points to the peripheral edge of the display panel 3.

  After the reference line generation unit 62 generates the reference line, the character extraction unit 63 inputs a handwritten character by a user's input operation on the input surface of the touch panel 2, and thereby the handwriting input locus output from the touch panel 2. The character is recognized from the coordinate data corresponding to, and the coordinate data for each character is extracted.

  The inclination angle calculation unit 64 sets the coordinate data of the circumscribed rectangle of each character based on the coordinate data for each character extracted by the character extraction unit 63, and determines the circumscribed rectangle for the reference line from the set coordinate data of the circumscribed rectangle. The inclination angle is calculated.

  Based on the coordinate data for each character extracted by the character extraction unit 63, the vertical direction character position correction unit 65 is arranged in a direction perpendicular to the reference line so that the characters input by handwriting are aligned along the reference line. The position of the character is corrected, and the position-corrected character is displayed on the display panel 3.

  The display device 1 according to the present embodiment aligns each character input by handwriting on the input surface of the touch panel 2 along a reference line arbitrarily set by a user input operation on the input surface, thereby displaying the display panel 3. Therefore, it is possible to display handwritten characters by arranging them in a straight line along the direction desired by the user. This makes it easier for the user to read the handwritten characters.

  The character inclination correction unit 66 rotates each character at the inclination angle calculated by the inclination angle calculation unit 64 to correct the inclination of each character with respect to the reference line, and displays the corrected character on the display panel 3. As a result, it is possible to make it easier to read a handwritten character.

  The parallel-direction character position correcting unit 67 is based on the coordinate data for each character extracted by the character extracting unit 63 so that the interval between adjacent characters becomes a predetermined interval in a direction parallel to the reference line. Character position correction is performed, and the position-corrected character is displayed on the display panel 3. As a result, it is possible to make it easier to read a handwritten character.

  The time measuring unit 68 determines whether or not an input operation on the input surface of the touch panel 2 is performed, and measures the waiting time for the input operation. The reference line deleting unit 69 deletes the reference line generated by the reference line generating unit 62 when the standby time measured by the time measuring unit 68 is equal to or longer than a predetermined time. Thus, the currently set reference line can be erased after elapse of a predetermined time. After the reference line is erased in this way, the user can arbitrarily set a new reference line by performing an input operation for designating two new reference points on the input surface of the touch panel 2. it can.

  The first storage means 7 has a function as a working memory in the display device 1. The first storage means 7 includes a display information storage unit 70, a coordinate data storage unit 71, a display panel peripheral information storage unit 72, a reference line display position storage unit 73, and an inclination correction value storage unit 74.

  The display information storage unit 70 stores display information displayed on the display panel 3. The coordinate data storage unit 71 stores reference point coordinate data output from the touch panel 2 and handwritten input character coordinate data. The display panel peripheral information storage unit 72 stores position information of the right end and the lower end of the peripheral part of the display panel 3. The reference line display position storage unit 73 stores the position of the reference line displayed on the display panel 3 by the reference line generation unit 62 with respect to the display panel 3. The inclination correction value storage unit 74 stores a correction value for correcting the inclination of the reference line, which is referred to when the reference line generation unit 62 generates the reference line.

  The second storage unit 8 includes a software storage unit 80, a driver storage unit 81, a user setting display screen storage unit 82, and a user setting table storage unit 83.

  The software storage unit 80 stores software for operating the display device 1. The driver storage unit 81 stores a touch panel driver that implements the touch panel data processing unit 4 and a display driver that implements the display data processing unit 5. The user setting display screen storage unit 82 stores information related to the setting of the display panel 3 set by the user who operates the display device 1. The user setting table storage unit 83 stores table information related to the reference line set by the user. The table information stored in the user setting table storage unit 83 includes reference line display necessity, reference line type (for example, solid line, dotted line), and reference line color (for example, black, gray, red). Etc.) is included.

  Next, the operation of the display device 1 according to the present embodiment will be described with reference to FIG. FIG. 2 is a flowchart showing the operation of the display device 1.

  In step s1, the display device 1 resets the time measurement by the time measuring unit 68. Next, in step s2, the display device 1 performs a reference point detection process.

  FIG. 3 is a flowchart showing the operation of the reference point detection process in the display device 1. The display device 1 performs a reference point detection process when a reference point is instructed by a user input operation on the input surface of the touch panel 2.

  First, in step s2-1, the touch panel 2 detects a reference point designated by a user input operation on the input surface, and outputs coordinate data corresponding to the reference point. The coordinate data acquisition unit 60 acquires coordinate data corresponding to the reference point output from the touch panel 2.

  Next, in step s2-2, the timing unit 68 determines whether or not an input operation is performed on the input surface of the touch panel 2, and when it is determined that the input operation is not performed, the input operation is waited. Start timing time.

  Next, in step s2-3, the touch panel 2 determines whether or not two reference points are instructed. When the touch panel 2 detects two reference points, the touch panel 2 determines that two reference points are instructed. If the touch panel 2 determines that two reference points are instructed, the process proceeds to step s2-4. If it is determined that two reference points are not instructed, the process proceeds to step s2-5.

In step S2-4, the coordinate data acquisition unit 60, based on the coordinate data corresponding to the two reference points which are outputted from the touch panel 2, the distance between the reference point to or smaller than the distance D ₁ which predetermined judge. If the distance between two reference points is greater than distance D _1, since the input operation to the touch panel 2 is likely to be erroneous, in order to eliminate the setting of the reference point by the erroneous operation, the coordinate data acquisition unit 60 There, it is determined the distance between the reference point of or less than the distance D ₁ which predetermined. Proceeds to step s2-6 when the coordinate data acquisition unit 60 determines that the distance between the reference point of the distance D ₁ or less, when it is determined that more than the distance D ₁ is returned to step S2-3.

  When it is determined in step s2-3 that two reference points are not instructed, in step s2-5, the time measuring unit 68 determines whether or not the standby time of the input operation has exceeded a predetermined time. . When the time counting unit 68 determines that the predetermined time or more has elapsed, the time measurement is reset and the process returns to step s2-1. When it is determined that the predetermined time or more has not elapsed, the process returns to step s2-3.

  In step s2-6, the coordinate data acquisition unit 60 transmits coordinate data corresponding to the acquired two reference points to the coordinate data storage unit 71. The coordinate data storage unit 71 stores coordinate data corresponding to the received reference point. When the coordinate data corresponding to the reference point is stored in the coordinate data storage unit 71 in this way, the reference point detection process in the display device 1 ends.

  Returning to FIG. 2, when the reference point detection process is completed in step s2, the process proceeds to step s3. In step s3, the display device 1 performs a reference line generation process.

FIG. 4 is a flowchart showing the operation of the reference line generation process in the display device 1. FIG. 5 is a diagram for explaining the operation of the reference line generation process in the display device 1. The display device 1 performs a reference line generation process based on the coordinate data corresponding to the _two reference points P ₁ and P ₂ stored in the coordinate data storage unit 71.

First, in step s 3-1, the reference line generation unit 62 extracts coordinate data corresponding to the _two reference points P ₁ and P ₂ stored in the coordinate data storage unit 71. Next, in step s3-2, the reference line generation unit 62 determines whether or not the X coordinate values of the _two reference points P ₁ and P ₂ are the same. When the reference line generation unit 62 determines that the X coordinate values of the _two reference points P ₁ and P ₂ are the same, the process proceeds to step s3-3 and the X coordinate values of the _two reference points P ₁ and P ₂ are determined. If it is determined that they are different, the process proceeds to step s3-4.

In step s3-3, the reference line generation unit 62 is the normal line of the line segment connecting the _two reference points P ₁ and P ₂ and has an inclination of “0”, that is, the touch panel 2 on which the orthogonal coordinates are set. A reference line G that is parallel to the X axis on the input surface 21 and extends rightward from the midpoint of the line segment to the peripheral edge of the display panel 3 is generated.

When it is determined in step s3-2 that the X coordinate values of the _two reference points P ₁ and P ₂ are different, in step s3-4, the reference line generation unit 62 determines the two reference points P ₁ and P ₂ . Based on the coordinate data, the slope “a” of the reference line G is calculated. Specifically, reference line generating unit 62, the coordinate data of the reference point _{P 1} (x1, y1), when the coordinate data of the reference points _{P 2} and (x2, y2), reference the following formula (1) The slope “a” of the line G is calculated.
a = (y2-y1) / (x2-x1) (1)

Next, in step s3-5, as shown in FIG. 5A, the reference line generation unit 62 is a normal line segment connecting the _two reference points P ₁ and P ₂ and has an inclination of “a”. The reference line G extending from the midpoint of the line segment to the right edge of the peripheral edge of the display panel 3 is generated. Note that, when new reference points P ₁ and P ₂ are instructed by a new input operation on the input surface 21 of the touch panel 2, the reference line generation unit 62 performs a new operation as shown in FIG. A reference line G based on the reference points P ₁ and P ₂ is generated. In this way, the user can arbitrarily set the reference line G by an input operation for inputting the reference point on the input surface 21.

  Next, in step s3-6, the reference line generation unit 62 determines whether or not a correction value “Cg” for correcting the inclination of the reference line G is set in advance. The reference line generation unit 62 determines that the correction value “Cg” is set in advance when the correction value “Cg” is stored in the inclination correction value storage unit 74. The correction value “Cg” is a numerical value for correcting the inclination of the reference line G stored in advance in the inclination correction value storage unit 74 in order to generate the reference line G having the inclination “0”.

  The correction value “Cg” is calculated in advance as follows. FIG. 6 is a flowchart showing a procedure for calculating the inclination correction value of the reference line. The process of calculating the correction value “Cg” is started when two reference points are input to the input surface 21 of the touch panel 2 in order to generate the reference line G having the inclination “0”.

  First, in step s3-6-1, the touch panel 2 is instructed by a user input operation on the input surface 21 to generate a reference line G with an inclination “0” (hereinafter referred to as “inclination correction reference”). Point)), and the coordinate data corresponding to the inclination correction reference point is output. Then, the coordinate data acquisition unit 60 acquires coordinate data corresponding to the inclination correction reference point output from the touch panel 2.

  Next, in step s3-6-2, the reference line generation unit 62 calculates the inclination of the normal line of the line segment connecting the two inclination correction reference points based on the coordinate data of the two inclination correction reference points. The correction value is calculated as “Cg”.

  In step s3-6-3, the reference line generation unit 62 transmits the calculated correction value “Cg” to the inclination correction value storage unit 74. The inclination correction value storage unit 74 stores the received correction value “Cg”. When the correction value “Cg” is stored in the inclination correction value storage unit 74 in this way, the calculation process of the correction value “Cg” ends.

  Returning to FIG. 4, when the reference line generation unit 62 determines in step s3-6 that the correction value “Cg” is preset, the process proceeds to step s3-7, where the correction value “Cg” is preset. If it is determined that it has not been performed, the process proceeds to step s3-8.

  In step s3-7, the reference line generation unit 62 corrects the inclination of the generated reference line G so as to approach the inclination “0” using the correction value “Cg”.

Next, in step s3-8, the reference line generation unit 62 sets the inclination of the reference line G to “0” when the absolute value of the inclination of the reference line G is equal to or less than a predetermined zero correction value “Rd”. To correct. In step s3-9, the reference line generation unit 62 displays the generated reference line G on the display surface 31 of the display panel 3. The reference line G displayed on the display surface 31 of the display panel 3 in this way is a character (in FIG. 5C) that is input by handwriting on the input surface 21 of the touch panel 2, as shown in FIG. This is the reference line for aligning the letters “Nu”) in a straight line. Note that, as shown in FIG. 5D, the reference line G is a reference line erasing unit even when the input operation instruction of the reference points P ₁ and P _{2 on} the input surface 21 of the touch panel 2 is canceled. Unless the erasing operation according to 69 is executed, the image is continuously displayed on the display surface 31 of the display panel 3.

  Returning to FIG. 2, when the reference line generation process is completed in step s3, the process proceeds to step s4. In step s4, the display device 1 performs a character extraction process.

  FIG. 7 is a flowchart showing the operation of the character extraction process in the display device 1. FIG. 8 is a diagram for explaining a character extraction result by the character extraction processing. The display device 1 performs character extraction processing by inputting characters by handwriting by an input operation on the input surface 21 of the touch panel 2 after the reference line generation unit 62 generates the reference line G.

  First, in step s 4-1, the touch panel 2 determines whether or not input of handwritten characters has been started on the input surface 21. The touch panel 2 determines that the input of the handwritten character is started when the handwritten character is input to the input surface 21 and the coordinate data indicating the start point of the handwritten character is acquired by the coordinate data acquisition unit 60. . When the touch panel 2 determines that the input of handwritten characters has been started, the process proceeds to step s4-2, and when it is determined that the input of handwritten characters has not started, step s4-1 is repeated.

  In Step s4-2, the touch panel 2 determines whether or not the input of handwritten characters on the input surface 21 is completed. The touch panel 2 determines that the input of the handwritten character is finished when the coordinate data acquisition unit 60 does not acquire the coordinate data indicating the locus of the handwritten character even after the predetermined time has elapsed. When the touch panel 2 determines that the input of the handwritten character is completed, the coordinate data indicating the locus of the handwritten character acquired by the coordinate data acquisition unit 60 is transmitted to the coordinate data storage unit 71 and stored therein, and step s4- Proceed to step 3. If touch panel 2 determines that the input of handwritten characters has not been completed, step s4-2 is repeated.

  In step s4-3, the time measuring unit 68 starts measuring the standby time for the input operation on the input surface 21 of the touch panel 2.

  Next, in step s4-4, the touch panel 2 determines whether or not input of handwritten characters on the input surface 21 is newly started. When the touch panel 2 determines that the input of handwritten characters is newly started, the process returns to step s4-2, and when it is determined that the input of handwritten characters is not newly started, the process proceeds to step s4-5.

  In step s4-5, the time measuring unit 68 determines whether or not the standby time of the input operation has passed for a predetermined time. When the time counting unit 68 determines that the predetermined time or more has elapsed, the time is reset and the process proceeds to step s4-6, and when it is determined that the predetermined time or more has not elapsed, the process returns to step s4-4.

  In step s4-6, the character extraction unit 63 extracts coordinate data indicating the locus of handwritten characters stored in the coordinate data storage unit 71, and extracts coordinate data for each character from the coordinate data. Then, as shown in FIG. 8, the character extraction unit 63 sets the circumscribing rectangle coordinate data of each character based on the extracted coordinate data for each character, and the character size is determined from the set circumscribing rectangle coordinate data. As the information indicating the character height, the character height “St” and the character width “Sw” are calculated. Further, the character extraction unit 63 sets the circumscribing rectangle coordinate data of each character based on the extracted coordinate data for each character, and from the set circumscribing rectangle coordinate data, the character inclination “Rc” with respect to the X axis. Is calculated.

  Returning to FIG. 2, when the character extraction process is completed in step s4, the process proceeds to step s5. In step s5, the display device 1 performs vertical character position correction processing.

  FIG. 9 is a flowchart showing the operation of the vertical character position correction process in the display device 1. FIG. 10 is a diagram for explaining the operation of the vertical character position correction process in the display device 1.

First, in step S5-1, the vertical character position correcting unit 65, as shown in FIG. 10 (a), the straight line L ₁ which has the same inclination as the character the character extraction unit 63 calculates "Rc" generated, place the straight line L ₁ on the circumscribed rectangle of the lower one side 91 of the character.

Next, in step s5-2, the vertical character position correcting unit 65, and FIG. 10 (b) as shown in the generated straight line L _1, the inclination of the character so as not to change the circumscribed rectangle of the upper one side 92 The number of intersections A ₁ , A ₂ , A ₃ , A ₄ between the straight line L ₁ and the character is calculated while being translated toward.

Next, at step S5-3, the vertical character position correcting unit 65 determines whether or not the straight line L ₁ is moved to a position above one side 92 of the circumscribed rectangle of a character. Proceeds to step s5-4 when vertical character position correcting unit 65 determines that the straight line L ₁ is moved to a position above one side 92 of the circumscribed rectangle of the character, if it is determined not to be moving step s5-2 Return to.

In step s5-4, the vertical character position correction unit 65 creates a histogram based on the number of intersections A ₁ , A ₂ , A ₃ , A ₄ between the straight line L ₁ and the character, and calculates the center of gravity of the character. .

  In step s5-5, the vertical character position correction unit 65 moves the character so that the center of gravity of the character is positioned on the reference line G as shown in FIG. For characters such as “nya” and “tsu” whose character height “St” and character width “Sw” are smaller than predetermined values, the center of gravity of the character is moved on the reference line G. Alternatively, it may be moved to a position below the reference line G by a predetermined value. In this way, the vertical character position correction unit 65 performs character position correction in the direction perpendicular to the reference line G so that the characters input by handwriting are aligned along the reference line G, thereby correcting the position. The displayed characters are displayed on the display surface 31 of the display panel 3.

  Returning to FIG. 2, when the vertical character position correction process is completed in step s5, the process proceeds to step s6. In step s6, the display device 1 performs a character inclination correction process.

  FIG. 11 is a flowchart showing the operation of the character inclination correction process in the display device 1. FIG. 12 is a diagram for explaining the operation of the character inclination correction process in the display device 1.

  First, in step s6-1, the inclination angle calculation unit 64 sets a circumscribed rectangle of each character based on the coordinate data for each character extracted by the character extraction unit 63, and uses the coordinate data of the circumscribed rectangle as a reference. The inclination angle of the circumscribed rectangle with respect to the line G is calculated, and the rotation angle of the character is calculated using the calculation result. Specifically, as shown in FIG. 12A, the inclination angle calculation unit 64 makes the character inclination “Rc” calculated by the character extraction unit 63 the same as the inclination “a” of the reference line G. The rotation angle of the character is calculated.

  Next, in step s6-2, the character inclination correction unit 66 rotates the character at the rotation angle calculated by the inclination angle calculation unit 64 as shown in FIG. Tilt correction is performed, and the corrected character is displayed on the display surface 31 of the display panel 3.

  Returning to FIG. 2, when the character inclination correction process is completed in step s6, the process proceeds to step s7. In step s7, the display device 1 performs parallel direction character position correction processing.

  FIG. 13 is a flowchart illustrating the operation of the parallel character position correction process in the display device 1. FIG. 14 and FIG. 15 are diagrams for explaining the operation of the parallel direction character position correction processing in the display device 1.

  First, in step s7-1, as shown in FIG. 14A, the parallel-direction character position correcting unit 67 performs the character input immediately before the latest character input last by continuous handwriting input. The coordinate data of the contact “Pp” on the latest character side is acquired at the contact on the circumscribed rectangle.

  Next, in step s7-2, as shown in FIG. 14A, the parallel-direction character position correcting unit 67, at the contact point on the circumscribed rectangle of the latest character, contacts “Pc” on the immediately preceding character side. ”Is acquired.

  Next, in step s7-3, the parallel direction character position correcting unit 67 determines whether or not the distance between the contact “Pp” and the contact “Pc” is equal to or less than a predetermined minimum character interval “DXmin”. If the parallel character position correction unit 67 determines that the character spacing is equal to or smaller than the minimum character spacing “DXmin”, the process proceeds to step s7-4. If it is determined that the minimum character spacing “DXmin” is exceeded, the processing proceeds to step s7-5. .

  In step s7-4, as shown in FIG. 14B, the parallel character position correction unit 67 updates the distance between the contact “Pp” and the contact “Pc” to the minimum character interval “DXmin”. Is moved along the reference line G.

  When it is determined in step s7-3 that the distance between the contact point “Pp” and the contact point “Pc” exceeds the minimum character interval “DXmin”, in step s7-5, the parallel direction character position correction unit 67 As shown in a), it is determined whether or not the distance between the contact “Pp” and the contact “Pc” is greater than or equal to a predetermined maximum character interval “DXmax”. If the parallel character position correction unit 67 determines that the maximum character interval “DXmax” is greater than or equal to step s7-6, the process proceeds to step s7-6. If it is determined that the parallel character position correction unit 67 is less than the maximum character interval “DXmax”, the parallel character position correction is performed. The processing operation is terminated.

  In step s7-6, the parallel character position correction unit 67 updates the distance between the contact “Pp” and the contact “Pc” to the maximum character interval “DXmax” as shown in FIG. Is moved along the reference line G.

  Further, the time measuring unit 68 determines whether or not an input operation is performed on the input surface 21 of the touch panel 2 and measures the waiting time for the input operation. Then, the reference line deleting unit 69 deletes the reference line G generated by the reference line generating unit 62 when the standby time measured by the time measuring unit 68 is equal to or longer than a predetermined time. Thus, the currently set reference line G can be erased after elapse of a predetermined time or more. After the reference line G is erased in this way, the user arbitrarily sets a new reference line G by performing an input operation for designating two new reference points on the input surface 21 of the touch panel 2. can do.

  As described above, the display device 1 aligns the characters input by handwriting on the input surface 21 of the touch panel 2 along the reference line G arbitrarily set by the user input operation on the input surface 21. Thus, since it is displayed on the display surface 31 of the display panel 3, it is possible to display handwritten characters by arranging them in a straight line along the direction desired by the user. This makes it easier for the user to read the handwritten characters.

  As still another embodiment of the present invention, in order to cause a computer to function as the display device 1 described above, at least one of a display program (an execution format program, an intermediate code program, and a source program) to be executed by the computer. It is also possible to provide a computer-readable recording medium on which the display program is recorded.

  As a recording medium for recording the display program, a memory (not shown) such as a CD-ROM (Compact Disc-Read Only Memory) itself is a program medium because processing is performed by a microcomputer. Alternatively, although not shown, a program reading device may be provided as an external storage device, and the program medium may be read by inserting a recording medium therein.

  In any case, the stored display program may be configured to be accessed and executed by a microprocessor, or in any case, the display program is read and the read display program is a microcomputer. The program may be downloaded to a program storage area (not shown) and the display program is executed. It is assumed that this download program is stored in the main device in advance.

  The program medium is a recording medium configured to be separable from the main body, and is a tape system such as a magnetic tape or a cassette tape, a magnetic disk such as a floppy (registered trademark) disk or a hard disk, or a CD-ROM / MO (Magneto Optical disc). ) / MD (Mini Disc) / DVD (Digital Versatile Disc) optical discs, IC (Integrated Circuit) cards (including memory cards) / Optical cards, etc., Mask ROM, EPROM (Erasable Programmable Read) It may be a medium that carries a fixed program including a semiconductor memory such as a Only Memory), an EEPROM (registered trademark) (Electrically Erasable Programmable Read Only Memory), or a flash ROM.

  Further, it may be a medium that has a system configuration capable of connecting to a communication network including the Internet so that the display program is fluidly carried so as to download the display program from the communication network. When the display program is downloaded from the communication network as described above, the download program may be stored in the main device in advance or installed from another recording medium. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the display program is embodied by electronic transmission.

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Touch panel 3 Display panel 60 Coordinate data acquisition part 61 Trajectory display instruction part 62 Base line generation part 63 Character extraction part 64 Inclination angle calculation part 65 Vertical direction character position correction part 66 Character inclination correction part 67 Parallel direction character position correction Part 68 Timekeeping part 69 Baseline elimination part

Claims (6)

An input unit that has an input surface for handwritten input, and outputs coordinate data representing a position of a point designated by an input operation on the input surface;
Based on the coordinate data output from the input unit, a display unit that displays a locus of handwriting input to the input surface;
When two points satisfying a predetermined condition are instructed by an input operation on the input surface, the two points are set as reference points, and a line segment connecting the two reference points based on the coordinate data corresponding to the reference points. A reference line generation unit that generates a reference line that is a normal line;
After the reference line generation unit generates a reference line, a character is recognized from the coordinate data corresponding to the locus of the handwritten input output from the input unit by being input by handwriting by an input operation on the input surface. A character extraction unit that extracts coordinate data for each character;
Based on the coordinate data for each character extracted by the character extraction unit, character correction in a direction perpendicular to the reference line is performed so that the characters input by handwriting are aligned along the reference line, A display device comprising: a vertical character position correction unit that displays a position-corrected character on the display unit.   The reference line generation unit generates the reference line so as to extend from a middle point of a line segment connecting two reference points to a peripheral edge of the display unit, and causes the display unit to display the generated reference line. The display device according to claim 1. Inclination for setting the circumscribing rectangle coordinate data of each character based on the coordinate data for each character extracted by the character extraction unit and calculating the inclination angle of the circumscribing rectangle with respect to the reference line from the set circumscribing rectangle coordinate data An angle calculator;
A character inclination correction unit that rotates each character at an inclination angle calculated by the inclination angle calculation unit, corrects the inclination of each character with respect to the reference line, and displays the corrected character on the display unit; The display device according to claim 1, further comprising a display device.   Based on the coordinate data for each character extracted by the character extraction unit, the position of the character in the direction parallel to the reference line is corrected so that the interval between adjacent characters becomes a predetermined interval. The display device according to claim 1, further comprising a parallel direction character position correction unit that displays the corrected character on the display unit. It is determined whether or not an input operation is performed on the input surface, and a time measuring unit that measures a standby time for the input operation;
The reference line erasing unit for erasing the reference line generated by the reference line generation unit when the standby time measured by the time measurement unit is equal to or longer than a predetermined time. The display device according to any one of 1 to 4.   A display program that causes a computer including an input unit and a display unit to function as the display device according to claim 1.

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