JP2003208259A - Coordinate input display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the operation efficiency of mode switching by eliminating the complicatedness of the switching operation of a handwriting plotting recognition mode and a graphic recognition mode and clarifying the status. <P>SOLUTION: This coordinate input display device is provided with: a coordinate input part 101 for detecting the position of a coordinate indicator brought into contact with a touch surface and outputting the positional information; a control part 103 for outputting display information by performing a prescribed arithmetic operation based on the detected positional information and controlling the handwriting plotting mode, the graphic recognition mode, and a graphic correction mode; and a display part 102 for displaying information obtained from the control part 103 on the screen. When no drag operation is performed in a prescribed period in the case of one point touch in which the coordinate detector is brought into contact with the touch surface in the handwriting plotting mode, its transition to the graphic recognition plotting mode is performed under the control of the control part 103. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coordinate input display device which improves handwriting drawing mode / graphic recognition drawing mode switching operability and operability in each mode when drawing characters and figures by touch input. .

[0002]

2. Description of the Related Art In a conventional coordinate input device, when it is necessary to draw a figure (straight line, triangle, quadrangle, circle) while writing a character by handwriting, a toolbar or an icon is touched to enter a figure drawing mode. The operation of switching and drawing a desired figure is generally performed. However, as the coordinate input device increases in size, it becomes difficult to operate in a standing position, and therefore, the operator is forced to move each time the toolbar is touched, which reduces usability. In order to solve such a problem, for example, Japanese Patent Laid-Open No. 10-154224 discloses a device that shifts to a figure recognition mode when the handwriting character recognition mode is detached after a predetermined period of stop. There is. In the case of character recognition or graphic recognition of handwritten drawing, it is common to convert stroke data into dictionary data and compare it with dictionary data for recognition processing.

As a reference technical document, for example, 2
A device for inputting a straight line or a quadrangle by touching points at the same time is disclosed in Japanese Unexamined Patent Publication No. 8-212992, and a device for which mode selection is not required by using a drag operation and key input is disclosed in Japanese Unexamined Patent Publication No. 9-44329. Each is disclosed.

[0004]

However, in the conventional device as shown above, the handwriting drawing recognition mode becomes the detached state after a predetermined time has passed,
When it comes to figure recognition mode, there is no means to inform the operator that it is in figure recognition mode.
If the operator detaches within a predetermined time, the figure recognition mode may not function, or the figure recognition mode may not be returned to the handwriting drawing recognition mode.

Further, in the case of character recognition or figure recognition of handwritten drawing, a large amount of pattern recognition processing needs to be performed in order to convert stroke data into dictionary data and perform recognition processing in comparison with dictionary data. Therefore, the efficiency was lowered.

The present invention has been made in view of the above, and eliminates the complexity of the switching operation between the handwriting drawing recognition mode and the figure recognition mode, and makes the status clear to improve the operability of mode switching. The first purpose is to do so.

Further, the figure being drawn can be recognized without incurring the overhead of the pattern recognition processing,
The second purpose is to improve efficiency.

[0008]

In order to achieve the above-mentioned object, in a coordinate input display device according to claim 1,
Coordinate detecting means for detecting the position of the coordinate pointing object touched on the touch surface and outputting position information, and performing predetermined calculation according to the position information detected by the coordinate detecting means, outputting display information, and handwriting A coordinate input display device comprising: a control unit for controlling a drawing mode, a graphic recognition drawing mode, and a graphic correction mode; and a display unit for displaying information output from the control unit on a screen. In the handwriting drawing mode, when the drag operation is not performed for a predetermined time when the coordinate detection object touches the touch surface for a predetermined time, the figure recognition drawing mode is entered.

According to the present invention, in the handwriting drawing mode, when the drag operation is not performed for a predetermined time when the coordinate detection object touches the touch surface for a predetermined time, by shifting to the figure recognition drawing mode, the conventional method can be used. It is possible to switch from handwriting drawing to figure recognition drawing at the actual drawing position without operating the toolbar displayed at a specific position on the screen.

Further, in the coordinate input display device according to the second aspect, the control means returns to the handwriting drawing mode when the drag operation is not performed for a predetermined time in the figure recognition drawing mode.

According to the present invention, for example, it is often confusing what to write while touching, and at this time, the figure recognition is drawn unintentionally, and when it becomes uncomfortable due to conversion into a figure, the figure is erased. Since it takes time and effort to draw by handwriting again, in claim 1, when the drag operation is not performed for a predetermined time in the figure recognition drawing mode, by returning to the handwriting drawing mode, the figure recognition drawing mode is changed unintentionally. When this happens, it is possible to return to handwriting drawing while continuing drawing without performing a troublesome operation such as stop / redo.

Further, in the coordinate input display device according to the third aspect, the control means drags from touch to detach when the coordinate pointing object is detached from the touch surface in the figure recognition drawing mode. If there is no change of a predetermined amount in the direction of the locus, the display is changed to straight line drawing.

According to this invention, in claim 1, when the coordinate pointing object is detached from the touch surface in the figure recognition drawing mode, a predetermined amount of change is not detected in the direction of the drag trajectory from touch to detach. In this case, by changing the display to the straight line drawing, it becomes possible to recognize the line as a straight line during the drawing, without using the pattern recognition processing that requires a large amount of processing as in the conventional case.

Further, in the coordinate input display device according to the fourth aspect, the control means changes a predetermined amount in the direction of the drag locus from the touch to the detach when the detach is made in the figure recognition drawing mode. If it is twice, a triangle is drawn.

According to the present invention, according to the first aspect, in the case of detaching in the figure recognition drawing mode, when there is a predetermined amount of change twice in the direction of the drag trajectory from touch to detach, triangle drawing is performed. It is possible to recognize as a triangle during drawing without relying on the pattern recognition processing that requires a large amount of processing as in the related art.

Further, in the coordinate input display device according to the fifth aspect, the control means changes a predetermined amount in the direction of the drag locus from the touch to the detach at the time of detach in the figure recognition drawing mode. When there are three times, the rectangle is drawn.

According to the present invention, according to the first aspect, in the case of detaching in the figure recognition drawing mode, when there is a predetermined amount of change in the direction of the drag trajectory from touch to detach three times, the rectangle is drawn. It is possible to recognize as a quadrangle during drawing without relying on the pattern recognition processing that requires a large amount of processing as in the conventional case.

Further, in the coordinate input display device according to the sixth aspect, the control means draws a circle when the drag locus from the touch to the detach is constantly changing during the detach in the figure recognition drawing mode. Is to do.

According to the present invention, in the case of detaching in the figure recognition drawing mode, when the drag locus from the touch to the detaching is constantly changing, by performing circle drawing, a pattern with a large processing amount as in the conventional case is obtained. It is possible to recognize as a circle during drawing without depending on the recognition processing.

Further, in the coordinate input display device according to the seventh aspect, the control means touches another drawing point (straight line, triangle, quadrangle, circle) line in the handwriting drawing mode and touches another point. When touched or detached, the figure correction mode is entered and the operation handle is displayed.

According to the present invention, conventionally, when moving or changing the size of a drawing figure in the handwriting drawing mode, it is necessary to move by a toolbar or icon operation, or to return to the handwriting drawing mode again. Therefore, in claim 1, when the drawing figure (straight line, triangle, quadrangle, circle) line is touched in the handwriting drawing mode and another point is touched or detached, the mode shifts to the figure correction mode. By displaying the operation handle, it becomes possible to select a figure without operating a toolbar displayed at a specific position on the screen as in the conventional case.

Further, in the coordinate input display device according to the eighth aspect, the control means controls another point while touching one point outside the figure selected in the figure correction mode.
When a point is touched, the figure correction mode is controlled to exit.

According to the present invention, conventionally, for example, in the operation of a normal personal computer, when a left click is made outside the figure in the figure correction mode, it is general to exit the figure correction mode. When operating it, you will not be able to exit the figure correction mode unintentionally because you need to operate the buttons, but all touch operations on the coordinate input device will be left-clicking, so you will not be able to touch the figure correction operation handle. Considering that it often happens that you accidentally exit the figure correction mode unintentionally, and the trouble of starting over from figure selection starts again,
In claim 1, when one point outside the figure selected in the figure correction mode is touched and another point is touched, control is made to exit from the figure correction mode, so that the operation handle is displayed. It is possible to avoid the case where the figure correction mode is released without being able to touch.

Further, in the coordinate input display device according to the ninth aspect, the control means touches one point inside (upper) the figure while touching another point in the figure correction mode. In this case, the selected figure is erased.

According to the present invention, conventionally, for example, in the handwriting drawing mode, the drawing figure is erased or the drawing figure is moved.
When changing the size, it is necessary to change the size by operating the toolbar and icons.
In the figure correction mode, when one point in the figure (upper) is touched and another point is touched, the selected figure is erased to be displayed at a specific position on the screen as in the conventional case. It is possible to erase the figure without operating the toolbar.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a coordinate input display device according to the present invention will be described below with reference to the accompanying drawings.
The details will be described. The present invention is not limited to this embodiment.

FIG. 1 is an explanatory diagram showing the configuration of a coordinate input display device according to an embodiment of the present invention. This coordinate input display device 100 is roughly provided at a position that does not shield the display screen, that is, at a position that does not obstruct, and a coordinate input unit 101 that detects and sends position information of a coordinate indicator, and an R input unit.
A display unit 102 that displays GB image data and a control unit 103 that performs drawing processing based on coordinate input information are provided.

The control unit 103 has a central processing unit (CPU) 105 that controls the present apparatus on a bus 104 according to a control program, a ROM 106 in which the control program is stored, and a working memory at the time of control. A RAM 107 used, a timer 108 for measuring a drag operation interval and the like, an RS232C,
USB (Universal Serial Bus)
Coordinate input device I /
Image output I / F1 for inputting F109 and RGB image data expanded in the image RAM and outputting to the display unit 102
10 and an image RAM 11 in which RGB image data is expanded
1 is connected to the HDI / F 112 for reading / writing font data and image data from / to the HD 113.

Next, the operation of the coordinate input display device constructed as described above will be described. Coordinate input unit 101
Indicates the position of the coordinate pointing object (pen, mouse, etc.) touched on the screen optically corresponding to the number of pixels of the display unit 102 (for example, 1024 in the X-axis direction and 768 in the Y-axis direction) (X, Y).
Coordinates are detected periodically (for example, 20 ms) and sent to the control unit 103. When the coordinate information is input, the control unit 103 executes the function set at the coordinate position based on the control program of the ROM 106, and the image RAM 111.
The image data is output to the display unit 102 by performing an operation such as drawing the image data or reading the data stored in the HD 113 to temporarily store the work data in the RAM 107. The display unit 102 displays and outputs the RGB image data on a screen.

Next, a coordinate detection method, a drawing method, a handwriting drawing control, etc. in the above coordinate input display device will be described with reference to the accompanying drawings.

FIG. 2 is an explanatory view showing a coordinate detecting method using the optical blocking method. In the figure, reference numerals 201 and 20
Reference numerals 2 are optical detectors, which are respectively arranged on the left and right sides as shown in the drawing. Further, reference numeral 203 is an optical detector 201,
The light reflection film is provided so as to surround the upper portion of 202.

In such a configuration, the optical detector 20
1, 202 emits irradiation light and detects light reflected by the light reflection film 203. When an object that blocks light is present on the screen, the light emitted from the optical detector is the light reflecting film 203.
The optical detector 201 on the left measures the direction θL of the object, and the optical detector 202 on the right measures θR.

The coordinates (X, Y) are calculated from W, H, θL, and θR by the following equation. X = W × tan θR ÷ (tan θL + tan θR) Y = H−W × tan θL × tan θR ÷ (tan θL +
tan θR)

Next, as shown in FIG. 3, a method of detecting two points when point B is touched during touching point A will be described. First, as shown in FIG. 3, when the point B is touched on the scanning light beam of the optical detector 201 on the left side of the point A, the coordinate input unit 101 detects the coordinates of the two points. Since it is known that the previous touch point coordinate is A, it is found that the subsequent touch point is B.

As shown in FIG. 3, when the point B is touched on the optical scanning line of the optical detector 202 on the right side of the point A, the coordinate input section 101 detects two-point coordinates. Since it is known that the previous touch point coordinate is A, it is found that the subsequent touch point is B.

Further, as shown in FIG. 3, when the point B is not on the scanning optical line of any of the optical detectors 201 and 202 on the left and right sides of the light, the coordinate input section 101 detects the coordinates of four points. The coordinates of the previous touch point A among the four points are known. C
Assuming that the point is a point touched later, D and B will not be detected because A and C are lined up on the same scanning ray as in FIG. Therefore, it is found that point C is not the coordinate of the second point. Assuming that point D is a point touched later, as in FIG.
Since D is lined up on the same ray, C and B are not detected. Therefore, it is found that the point D is not the coordinate of the second point. Therefore, since the points C and D are not the second touch points, it is found that the subsequent touch point is B.

Next, referring to the drawing vector diagram of FIG.
Previous detected coordinates (X, Y), new detected coordinates (X0, Y
0), a method of calculating the drawing vector value (V) when the drawing direction is divided into N ° units will be described.

When A (X0 ≧ X, Y0 <Y), V = (arctan ((X0-X) ÷ (Y−Y0)) ÷
When calculated by N and B (X0> X, Y0 ≧ Y), V = (arctan ((Y0−Y) ÷ (X0−X)) ÷
It is calculated by N + 90 ÷ N.

When C (X0≤X, Y0 <Y), V = (arctan ((X-X0) ÷ (Y0-Y)) ÷
Calculated by N + 180 ÷ N, and when D (X0 <X, Y0 ≧ Y), V = (arctan ((Y−Y0) ÷ (X−X0)) ÷
It is calculated by N + 270 ÷ N.

Next, the figure drawing method in the handwritten character mode will be described with reference to the figure drawing operation diagram shown in FIG. The figure recognition is performed by calculating the drawing vector value from the previous input coordinate and the new input coordinate, and by sequentially calculating the difference between the previous drawing vector value and the new drawing vector value until detaching. Since a vector change of about 90 ° or more occurs when drawing a triangle and around 90 ° when drawing a rectangle, the figure determination angle M is set to about 70 °.

As shown in FIG. 5, when the touch is stopped for a specific time without dragging, the mode is shifted to the figure recognition drawing mode. At this time, the figure recognition drawing cursor 20 indicating that the mode is changed to the figure recognition drawing mode is displayed.
Then, as shown in FIG. 5, when there is no large change in the drawing vector difference and there is no specific regularity in the change amount, the touch point (X0, Y0) and the detach point (X1, Y1) are drawn as straight lines. Then, the detachment returns to the handwriting drawing mode, and the handwriting drawing cursor 10 is displayed (see).

As shown in FIG. 5, the drawing vector difference M
If the above occurs at two points (X1, Y1) and (X2, Y2), and Y1> Y2, the vertex of the triangle is (X
0, Y0), (X1, Y1), and (X, Y1) are drawn. In this case, (Y1−Y0) ÷ (X0−X) = (Y
1-Y0) / (X2-X) to X = (Y1 * X2-Y0 * X2 + Y2 * X0-Y1 * X)
0) ÷ (Y0−Y2) is calculated.

As shown in FIG. 5, the drawing vector difference M
° If the above occurs at 3 points, the minimum X of handwritten drawing coordinates
Coordinate (X0), maximum X coordinate (X1), minimum Y coordinate (Y
2) Obtain the maximum Y coordinate (Y3) from drawing tracking. In this case, (X0, Y2), (X1, Y2), (X1, Y
3), Draw a quadrangle having (X0, Y3) as vertices.

As shown in FIG. 5, when the drawing vector difference approximates and increases (decreases), the minimum X coordinate (X0), the maximum X coordinate (X1), and the minimum Y coordinate (Y) of the handwritten drawing coordinates.
2), the center point of the circle calculated below from the maximum Y coordinate (Y3),
Draw a circle on the diameter. Circle center point = (X0 + X1) / 2, (Y2 + Y3) / 2 Circle diameter = ((X1-X0) + (Y3-Y2)) / 2

Next, with reference to the straight line correction operation diagram shown in FIG. 6, a method of correcting the drawn straight line will be described. First, FIG.
As indicated by, touching one point on the straight line while touching another point shifts to the straight line correction mode. The operation handle 50 at this time is indicated by a □ (white square) mark. Then, as shown in, the operation handle 50 is touched (the correction cursor 30 is indicated by a double-headed arrow) and dragged to fix another point and correct the length and inclination of the straight line. During the dragging, the solid line is drawn by touching the dotted line. Further, as shown in, the line is moved by touching (displaying the moving cursor 40) on a straight line other than the handle and dragging.

Next, the drawing triangle correction method will be described with reference to the triangle correction operation diagram shown in FIG. As shown in in Fig. 7, while touching one point on the triangle,
Touch the point to enter the triangle correction mode.
When changing the size and shape of the triangle, as shown in, the operation handle 50 is touched and dragged to fix the base and move the apex to correct the size and shape. Further, when moving a triangle, as shown in, the triangle is moved by touching and dragging inside the triangle.

Next, the quadrangle correction method will be described with reference to the quadrangle correction operation diagram shown in FIG. First, as shown in FIG. 8, while touching one point on the square line, another point is touched to enter the square correction mode. When changing the size, as shown in, the operation handle 50 on the side is touched and dragged to change the size with the opposite side fixed. Further, when moving the rectangle, the operation handle 50 on the apex is used.
Touch and drag to change the size so that the opposite corner vertex is fixed. As shown in, move the rectangle by touching and dragging inside the rectangle.

Next, a method of correcting a circle will be described with reference to the circle correction operation diagram shown in FIG. First, as shown in FIG. 9, while touching one point on the circle line, another point is touched to shift to the circle correction mode. In the case of deforming the circle, as shown in, by touching and dragging one point of the operation handle 50 of A, the opposite point is fixed and the size is changed. B operation handle 50
Touch one point of and drag to change the size while maintaining the circle shape. When moving a circle,
As shown in, the circle is moved to a desired position by touching and dragging inside the circle.

Next, with reference to the figure / operation handle erasing diagram shown in FIG. 10, a method of erasing figures and operation handles will be described. As shown in FIG. 10, the operation handle 50 is erased by double-clicking outside the figure in which the operation handle 50 is displayed. Further, as shown in, the figure is displayed by double-clicking within the figure in which the operation handle 50 is displayed. If the figures overlap, erase the figure on the foreground.

Next, handwritten drawing and figure recognition drawing methods will be described with reference to the flow charts shown in FIGS. The coordinate input unit 101 periodically (20 ms cycle) detects the coordinates of one point of the pointing object, or the coordinates of two points when another point is touched while one point is being touched, and the control unit 103 is notified. Send coordinate data. Control unit 10
The coordinate input control program (driver) 3 receives the coordinate data and transfers it to the I / F provided by the OS. The handwriting drawing control program (application) receives the coordinate data via this I / F and executes handwriting drawing.

First, coordinate data input processing is performed. First, it is determined whether the coordinate data is input (step S11), and if the coordinate data is input, it is further determined whether the touch coordinate is input (step S1).
2). Here, if it is the touch coordinate, the touch coordinate is stored (step S13), the touch stop time is set to 0 (step S14), and the status is set to idle (step S15).

In this case, for example, the coordinate data having the contents shown in FIG. 15 is received. As shown in the figure, the coordinate status includes touch coordinates, detach coordinates, and two-point coordinates. The touch coordinates are the coordinates at which the coordinate pointing object is first detected, the detach coordinates are the coordinates at which the coordinate pointing object is no longer detected, and the two-point coordinates are the first point coordinates (X coordinates 0, Y.
Coordinate 0) means the second coordinate (X coordinate 1, Y coordinate 1).

If it is determined in step S12 that the coordinates are not touch coordinates, it is further determined whether or not the input is in two-point coordinates (step S16). If it is determined that the input is not the two-point coordinate, it is further determined whether the status is the figure correction mode (step S).
17). Here, if it is not the figure correction mode, further 1
It is determined whether the dot is on the figure (step S1).
8).

When it is determined that the first point is on the figure and the figure is not in the figure correction mode, the operation handle 50 is displayed on the figure (step S19) and the status is set to the figure correction mode (step S20). . That is, if the touch point ahead of the two-point coordinates is on the drawing figure and the figure correction mode has not already been entered, the mode shifts to the figure correction mode,
The operation handle 50 is displayed on the figure.

If it is determined in step S17 that the figure correction mode is set, it is further determined whether or not the touch point is outside the first figure (step S21), and the figure correction handle is displayed (step S22). Further, the status is set to idle (step S23). Ie 2
When the touch point ahead of the point coordinates is outside the drawing figure and is in the figure correction mode, the figure correction mode is ended.

When it is determined in step S21 that the touch point is not outside the first figure, it is further determined whether or not the first touch point is within (upper) the figure (step S24). Here, the first touch point is in the figure (top)
If so, the figure is erased (step S25), and the status is set to idle (step S26).
That is, the touch point ahead of the two-point coordinates is in the drawing figure (top)
If it is in the figure correction mode, the figure in the correction mode is erased.

When it is determined in step S16 that the coordinates are not two-point coordinates, it is further determined whether or not the coordinates are detach coordinates (step S27). If it is determined that the coordinates are the detached coordinates, it is further determined whether or not the figure recognition drawing mode is set (step S28). If the figure recognition drawing mode is set, the handwriting drawing locus is erased (step S28).
29) and change to graphic drawing (step S30).

That is, when the drawing is performed in the figure recognition drawing mode and detached (the coordinate detection object is set to the non-detection state from the coordinate input unit 101), the handwritten drawing line is changed to the figure drawing by the method by the figure drawing described in FIG. change.

Then, the figure recognition drawing mode is released at the time of detachment, the process returns to the handwriting drawing mode, the handwriting drawing cursor is displayed (step S31), and the idle state is set (step S32).

If it is determined in step S27 that the coordinates are not the detached coordinates, those coordinates are saved (step S3).
3) It is determined whether or not the status is touch coordinates (step S34). Here, in case of touch coordinates,
It is determined whether or not touch coordinates = coordinates (step S3
5) If touch coordinates = coordinates, the touch stop time is counted up (step S36).

Subsequently, it is determined whether or not the mode is the graphic recognition drawing mode (step S37), and if the mode is the graphic recognition drawing mode, the graphic recognition drawing cursor is displayed (step S38). Furthermore, a dotted line is drawn with a preset color and thickness between the coordinates (step S3
9), the status is set to the figure recognition drawing mode (step S40). That is, here, when there is no drag operation at the time of touch and the operation is stopped for a specific time (for example, 1 to 2 seconds), the mode automatically shifts to the figure recognition drawing mode and the z-system recognition drawing cursor is displayed.

If it is determined in step S35 that the touch coordinates are not the coordinates, the touch coordinates and the current coordinates are drawn by a solid line (step S41), and the handwriting drawing mode is set (step S42). That is, in the handwriting drawing mode, the solid line drawing is performed with the preset color and thickness between the coordinates.

When it is determined in step S34 that the status is not the touch coordinate, it is further determined whether or not the handwriting drawing mode is set (step S43). If it is the handwriting drawing mode, the previous coordinates and the present coordinates are drawn by solid lines (step S44).

If it is not in the handwriting drawing mode in step S43, it is further determined whether or not it is in the figure correction mode (step S45). Here, when it is determined that the figure correction mode is set, it is determined whether the touch coordinates are on the operation handle (step S46), and if the touch coordinates are on the operation handle, the drawing described in FIG. 6 above is performed. The figure is changed (corrected) according to the figure correction method (step S47).

If the touch coordinates are not on the operation handle in step S46, it is further determined whether or not the touch coordinates are within (upper) the figure (step S48). Here, if the touch coordinates are within (above) the figure, the drawn figure is moved in the dragging direction (step S49).

If it is not in the figure correction mode in step S45, it is judged whether or not the drag is stopped (step S50). If the drag is stopped, it is further judged whether or not the current coordinates and the previous coordinates match. Is determined (step S51), and if the two coordinates do not match, the previous coordinate and the current coordinate are drawn with a solid line (step S52), and the figure recognition drawing mode is set (step S53).

In step S51, if the current coordinate matches the previous coordinate, the drag stop time is counted up (step S54), and it is further determined whether or not the handwriting drawing mode is entered (step S55). If the mode is the handwriting drawing mode, the dragged trajectory is drawn by a solid line (step S56), the handwriting drawing cursor is displayed (step S57), and the handwriting drawing mode is set (step S58). That is, here, when the drag operation is stopped for a specific time (for example, 1 to 2 seconds) during the figure recognition drawing, the handwriting drawing mode is automatically entered, and the dragged track drawn by the dotted line is changed to the solid line drawing.

If it is determined in step S50 that the drag is not stopped, it is determined whether the figure recognition drawing mode is set (step S59). If the figure recognition drawing mode is set, the previous coordinate and the current coordinate are further matched. It is determined whether or not there is (step S60). Here, if the current coordinates match the previous coordinates, the drag stop time is set to 0 (step S61), and the status is set to drag stop (step S62). In this way, when there is a drag stop during the graphic recognition drawing, the transition to the handwriting drawing mode is monitored.

In step S60, if the previous coordinate and the current coordinate are different, a dot line is drawn between the previous coordinate and the current coordinate (step S63), and the previous vector is calculated according to the drawing vector calculation method described in FIG. A drawing vector is calculated from the coordinates and the current coordinates, a change value of the drawing direction is calculated from the drawing vector value calculated last time, and the calculated change value is stored (step S64). Further, it is determined whether or not this change value is 70 degrees or more (step S65), and if it is 70 degrees or more, it is saved as vertex coordinates (step S66).

[0070]

As described above, according to the coordinate input display device of the present invention (claim 1), the drag operation is predetermined when the touch point is touched by the coordinate detection object in the handwriting drawing mode. If it is not done for a while, by switching to figure recognition drawing mode, you can switch from handwriting drawing to figure recognition drawing at the actual drawing position without operating the toolbar displayed at a specific position on the screen as in the past. As a result, it is possible to improve the efficiency of handwriting drawing and graphic drawing.

According to the coordinate input display device (claim 2) of the present invention, in claim 1, when the drag operation is not performed for a predetermined time in the figure recognition drawing mode, the handwriting drawing mode is restored. , When the figure recognition drawing mode is changed unintentionally, cancel /
Since it is possible to return to the handwritten drawing while the drawing is continued without performing a troublesome operation such as redoing, it is possible to improve the efficiency of the handwritten drawing and the graphic drawing.

Further, according to the coordinate input display device (claim 3) of the present invention, in claim 1, when the coordinate pointing object is detached from the touch surface in the figure recognition drawing mode, from touch to detach time. If a predetermined amount of change is not detected in the direction of the drag trajectory of, it is possible to recognize as a straight line during drawing by changing the display to straight line drawing, without relying on the pattern recognition processing as in the past. The figure recognition can be performed without causing the overhead due to the pattern recognition, and the efficiency is improved.

According to the coordinate input display device of the present invention (claim 4), in the case of detaching in the figure recognition drawing mode in claim 1, a predetermined amount is applied in the direction of the drag locus from touch to detach. When there is a change twice, by performing triangle drawing, it is possible to recognize as a triangle during drawing without relying on pattern recognition processing as in the past, and thus figure recognition can be performed without incurring the overhead of pattern recognition. Can be done and its efficiency is improved.

According to the coordinate input display device of the present invention (claim 5), in the case of detaching in the figure recognition drawing mode in claim 1, a predetermined amount is provided in the direction of the drag locus from touch to detach. When the change occurs three times, by performing the quadrangle drawing, it is possible to recognize the quadrangle during the drawing without relying on the pattern recognition processing as in the conventional art. Therefore, the figure recognition can be performed without incurring the overhead of the pattern recognition. Can be done and its efficiency is improved.

Further, according to the coordinate input display device of the present invention (claim 6), in the case of detaching in the figure recognition drawing mode, if the drag locus from the touch to the detaching always changes, the circle drawing is performed. As a result, it is possible to recognize as a circle during drawing without relying on the pattern recognition processing as in the past, so it is possible to perform figure recognition without incurring the overhead of pattern recognition.
Its efficiency is improved.

Further, according to the coordinate input display device (claim 7) of the present invention, in claim 1, another one is touched on the drawing figure (straight line, triangle, quadrangle, circle) line in the handwriting drawing mode. When a point is touched or detached, it moves to the figure correction mode and the operation handle is displayed, so that the figure can be selected without operating the toolbar displayed at a specific position on the screen as in the past. It is possible to improve operability in drawing graphics.

According to the coordinate input display device of the present invention (claim 8), in addition to touching one point outside the figure selected in the figure correction mode in claim 1, another point is touched. In this case, it is possible to avoid the case where the figure correction mode is released because the figure cannot be touched on the operation handle by controlling to exit the figure correction mode. Can be improved.

According to the coordinate input display device of the present invention (claim 9), in claim 1, in the figure correction mode, one point in the figure (upper) is touched while another point is touched. In this case, by deleting the selected figure, it is possible to delete the figure without operating the toolbar displayed at a specific position on the screen as in the conventional case, thus improving the operability in figure drawing. be able to.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of a coordinate input display device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a coordinate detection method using an optical blocking method.

FIG. 3 is an explanatory diagram showing a two-point detection method according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a method of calculating a drawing vector according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a figure drawing method in a handwritten character mode according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a method of correcting a drawing straight line according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a method of correcting a drawing triangle according to the exemplary embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a method of correcting a drawing quadrangle according to the embodiment of the present invention.

FIG. 9 is an explanatory diagram showing a method of correcting a drawing circle according to the embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a method of erasing a figure and an operation handle according to the embodiment of the present invention.

FIG. 11 is a flowchart showing an example of handwriting drawing and graphic recognition drawing operations (steps S11 to S26) according to the embodiment of the present invention.

FIG. 12 is a flowchart showing an example of handwriting drawing and graphic recognition drawing operations (steps S27 to S32) according to the embodiment of the present invention.

FIG. 13 is a flowchart showing an example of handwriting drawing and figure recognition drawing operations (steps S33 to S49) according to the embodiment of the present invention.

FIG. 14 is a flowchart showing an example of handwriting drawing and figure recognition drawing operations (steps S50 to S66) according to the embodiment of the present invention.

FIG. 15 is an explanatory diagram showing a configuration example of coordinate data according to the exemplary embodiment of the present invention.

[Explanation of symbols]

10 Handwriting drawing cursor 20 Graphic recognition drawing cursor 50 operation handle 100 coordinate input display device 101 coordinate input section 102 display 103 control unit 105 Central processing unit 108 timer 109 Coordinate input device I / F 110 Image output I / F 111 image RAM

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G06T 11/80 G06T 11/80 EF term (reference) 5B050 AA10 BA18 CA07 DA09 FA09 FA13 5B068 AA05 AA22 BB20 BC02 BC04 BD09 BD17 BE08 CC13 CC17 CC18 CD06 5B087 AA09 CC26 CC33 DD03 DD10 DD17

Claims (9)

[Claims] 1. A display information which detects a position of a coordinate pointing object touched on a touch surface and outputs position information, and a predetermined calculation is performed according to the position information detected by the coordinate detecting device. In a coordinate input display device comprising: a control unit that outputs a handwriting drawing mode, a figure recognition drawing mode, and a figure correction mode; and a display unit that displays information output from the control unit on a screen, In the handwriting drawing mode, the control means shifts to the figure recognition drawing mode when a drag operation is not performed for a predetermined time when a touch point is touched by a coordinate detection object, and the coordinate input display device. . 2. The control means, when the drag operation is not performed for a predetermined time in the figure recognition drawing mode,
The mode is returned to the handwriting drawing mode.
The coordinate input display device described in. 3. When the coordinate pointing object is detached from the touch surface in the figure recognition drawing mode, the control means draws a straight line if there is no change of a predetermined amount in the direction of the drag trajectory from touch to detach. The coordinate input display device according to claim 1, wherein the display is changed. 4. The control means, when detaching in the figure recognition drawing mode, when there is a predetermined amount of change twice in the direction of the drag trajectory from touch to detach,
The coordinate input display device according to claim 1, wherein a triangle is drawn. 5. The control means, when detaching in the figure recognition drawing mode, when there is a predetermined amount of change three times in the direction of the drag trajectory from touch to detach,
The coordinate input display device according to claim 1, wherein a rectangular drawing is performed. 6. The coordinate according to claim 1, wherein the control means performs a circle drawing when the drag locus from the touch to the detach is constantly changing during detaching in the figure recognition drawing mode. Input display device. 7. The control means, when touching or detaching another point while touching a drawing figure (straight line, triangle, quadrangle, circle) line in the handwriting drawing mode,
The coordinate input display device according to claim 1, wherein the coordinate input display device shifts to the figure correction mode and displays an operation handle. 8. The control means controls to exit from the figure correction mode when one point outside the figure selected in the figure correction mode is touched and another point is touched. The coordinate input display device according to claim 1. 9. The control means erases the selected figure when one point inside (top) the figure is touched while another point is touched in the figure correction mode. The coordinate input display device according to claim 1.