JP2018163684A - Information processing device, information processing program, and information processing method - Google Patents

Abstract

SOLUTION: An information processing device (electronic blackboard) includes a CPU. changes size of an erasure area of an eraser cursor in accordance with a first operation feature amount, such as movement speed of touch coordinates to be detected when erasing an image in an eraser mode under an instruction of the CPU, and fixes the size of the erasure area of the eraser cursor when a second operation feature amount, such as movement stop time of the touch coordinates to be detected when erasing the image satisfies a prescribed condition.EFFECT: Since size of an erasure area of an eraser cursor can be changed according to an operation by a user when an image is erased by using the eraser cursor and the size of the erasure area of the eraser cursor can be fixed within desired size, operability of an eraser function is improved.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an information processing device, an information processing program, and an information processing method, and more particularly, for example, an information processing device, an information processing program, and an information processing method for displaying an image input using a coordinate input unit on a screen of a display device. About.

  In general drawing software used for information processing devices such as an electronic blackboard with a touch panel display, the eraser function (eraser mode) can be selected as a function for erasing handwritten images entered on the display screen. It has become. In this eraser function, when an electronic pen or the like is brought into contact with the touch panel, an eraser cursor having a predetermined erase area is displayed around the contact position, and a handwritten image in the displayed erase area is erased. When a drag operation for moving the electronic pen or the like while touching the touch panel is performed, the eraser cursor is moved accordingly, and the handwritten image in the movement locus of the erasure area is erased. Also, some conventional general drawing software allows the size and shape of the erase area of the eraser cursor to be selected (variable) by user designation before erasing the image.

  When erasing an image using such a general eraser function, when the user wants to erase a large range of handwritten images, the user designates (selects) an eraser cursor having a large erase area, and selects a small range of handwritten images. When erasing is desired, an eraser cursor having a small erasing area is designated. However, it takes time and effort to specify the erase area size of the eraser cursor each time according to the size of the range to be erased.

  An example of the prior art for this problem is disclosed in Patent Document 1. In the interactive correction device of Patent Document 1, when a mouse button is pressed and dragged on the display screen, a coordinate sequence in which positions on the display screen are sampled at appropriate intervals is generated, and the coordinate sequence and the coordinates derived from the coordinate sequence are generated. The area on the display screen is determined from the movement rate, and the pixels in the determined area are corrected to the background value. That is, in the technique of Patent Document 1, the size of the area to be corrected (erasing area) is changed sequentially according to the speed of moving the mouse, so that the erasing operation is similar to the case of erasing characters on the paper with an eraser. Can be done.

JP-A-6-223144

  In the technique of Patent Document 1, since the size of the correction area is changed according to the moving speed of the mouse, the size of the correction area is always changed and stabilized unless the user moves the mouse at a constant speed. Therefore, it is difficult to maintain the size of the region to be corrected at a desired size. Therefore, the eraser function in the technique of Patent Document 1 has difficulty in operability and is not easy to use.

  Therefore, a main object of the present invention is to provide a novel information processing apparatus, information processing program, and information processing method.

  Another object of the present invention is to provide an information processing apparatus, an information processing program, and an information processing method that are excellent in operability of the eraser function.

  1st invention is the information processing device which displays the picture which is input using the coordinate input means on the screen of the display device, the coordinate detection means which detects the indicated coordinate on the screen by the coordinate input means, coordinate detection When the eraser mode is set by the eraser mode setting means, the eraser mode setting means for setting the eraser mode for erasing the image displayed on the display device in accordance with the input instruction based on the indicated coordinates detected by the means, the coordinates In accordance with an input instruction based on the indicated coordinates detected by the detecting means, an erasing means for erasing the image in the erasing area of the eraser cursor displayed on the display device, and a detection result by the coordinate detecting means when erasing the image by the erasing means Based on the first operation feature quantity detecting means for detecting the first operation feature quantity and the first operation feature quantity detecting means. Based on the detection result by the eraser size changing means for changing the size of the erasing area and the coordinate detecting means when erasing the image by the erasing means, in accordance with the first operation feature quantity detected in this manner. A second operation feature amount detection means for detecting the eraser size, and an eraser size fixing means for fixing the size of the erase area when the second operation feature amount detected by the second operation feature amount detection means satisfies a predetermined condition. Information processing apparatus.

  In the first invention, the information processing apparatus is an electronic blackboard, a PC, or the like, and includes a coordinate detection unit, an eraser mode determination unit, and an erasing unit. The coordinate detection means detects the designated coordinates on the screen of the display device by coordinate input means such as a touch panel and a mouse. When the eraser mode is set by the eraser mode setting means, for example, when a drag (slide) operation is performed, the eraser erases the image in the locus where the eraser cursor erased area displayed on the display device has moved. To do. The information processing apparatus also includes first operation feature amount detection means, eraser size change means, second operation feature amount detection means, and eraser size fixing means. The first operation feature amount detection unit detects a first operation feature amount such as a moving speed of the designated coordinates (touch coordinates) based on a detection result by the coordinate detection unit when the image is deleted by the deletion unit. Then, the eraser size changing means changes the size of the erase area in accordance with the detected first operation feature amount, for example, the erase area is enlarged when the movement speed of the designated coordinates is high. In addition, the second operation feature amount detection unit is configured to detect the touch coordinates simultaneously detected at a position where the touch coordinate movement stop time or a predetermined value or more is based on a detection result by the coordinate detection unit when the image is deleted by the deletion unit. The second operation feature amount such as the number of the second operation features is detected. The eraser size fixing means detects a plurality of touch coordinates (multi-touch) when the detected second operation feature amount satisfies a predetermined condition, for example, when the movement stop time of the detected touch coordinates is longer than a predetermined time. If this happens, fix the erase area size of the eraser cursor.

  According to the first aspect, the size of the erase area of the eraser cursor is changed according to the first operation feature amount based on the designated coordinates during image erasure, and the second operation feature based on the designated coordinates during image erasure. When the amount satisfies a predetermined condition, the size of the erase area of the eraser cursor is fixed. That is, in addition to changing the size of the erase area of the eraser cursor based on the user's action when erasing the image using the eraser cursor, it is also possible to fix the eraser cursor at a desired size, so the eraser function Improved operability.

  The second invention is dependent on the first invention, and detects a third operation feature amount based on a detection result by the coordinate detection means when the erase area size is fixed by the eraser size fixing means. A fixing release means for releasing the size of the erased area by the eraser size fixing means when the third operation feature quantity detecting means and the third operation feature quantity detected by the third operation feature quantity detecting means satisfy a predetermined condition; Prepare.

In the second invention, the information processing apparatus further includes third operation feature amount detection means and fixation release means. The third operation feature amount detection unit detects the third operation feature amount based on the detection result by the coordinate detection unit when the image is deleted by the deletion unit. Then, when the detected third operation feature amount satisfies the predetermined condition, for example, when touch-off or multi-touch is detected, the eraser size fixing means releases the fixing of the erase area size of the eraser cursor. Note that different feature amounts may be employed as the second operation feature amount and the third operation feature amount, or the same feature amount may be employed. That is, the condition for fixing the size of the erase area and the condition for canceling may be different or the same.

  A third invention is dependent on the first or second invention, and when the size of the erased area is made smaller than a predetermined size by the eraser size changing means, the eraser shape changing means for making the shape of the erased area circular. Is provided.

  In 3rd invention, an eraser shape change means is further provided. The eraser shape changing means makes the shape of the erase area circular when the erase area size of the eraser cursor is made smaller than a predetermined value. This makes it easy to correct small parts.

  A fourth invention is an information processing program executed by a processor of an information processing device for displaying an image input using a coordinate input means on a screen of a display device, the processor being displayed on a screen by a coordinate input means. The coordinate detection means for detecting the designated coordinates, the eraser mode setting means for setting the eraser mode for erasing the image displayed on the display device according to the input instruction based on the designated coordinates detected by the coordinate detection means, and the eraser mode setting When the eraser mode is set by the means, the erase means for erasing the image in the erase area of the eraser cursor displayed on the display device according to the input instruction based on the designated coordinates detected by the coordinate detection means, by the erase means Based on the detection result by the coordinate detection means when erasing the image, the first operation feature The first operation feature quantity detecting means for detecting the image, the eraser size changing means for changing the size of the erase area in accordance with the first operation feature quantity detected by the first operation feature quantity detecting means, and the image is erased by the erase means The second operation feature quantity detecting means for detecting the second operation feature quantity and the second operation feature quantity detected by the second operation feature quantity detection means satisfying a predetermined condition based on the detection result by the coordinate detection means when It is an information processing program that functions as eraser size fixing means for fixing the size of the erase area when it is satisfied.

  According to the fourth invention, as in the first invention, the operability of the eraser function is improved.

  5th invention is equipped with the coordinate detection means which detects the instruction | indication coordinate by a coordinate input means, and the display apparatus which displays the content input using the coordinate input means on a screen, When the eraser mode is set, The processor of the information processing apparatus executes an eraser cursor having a predetermined erase area on the display device and erases an image in the erase area in accordance with an input instruction based on the designated coordinates on the screen detected by the coordinate detection means. An information processing method comprising: (a) detecting a first operation feature quantity and a second operation feature quantity based on a detection result by the coordinate detection means when erasing an image in the eraser mode; (b) step ( a step of changing the size of the erased area in accordance with the first operation feature amount detected in a), and (c) a detection in step (a). When the second operation feature quantity satisfies a predetermined condition, comprising the step of fixing the size of the erased area, an information processing method.

  According to the fifth aspect, as with the first aspect, the operability of the eraser function is improved.

According to the present invention, the size of the erase area of the eraser cursor is changed according to the first operation feature amount based on the instruction coordinates during image erasure, and the second operation feature amount based on the instruction coordinates during image erasure is obtained. When the predetermined condition is satisfied, the size of the erase area of the eraser cursor is fixed. That is, in addition to changing the size of the erase area of the eraser cursor based on the user's action when erasing the image using the eraser cursor, it is also possible to fix the eraser cursor at a desired size, so the eraser function Improved operability.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is an illustration figure which shows schematically the external appearance of the electronic blackboard which is 1st Example of this invention. It is a block diagram which shows the electrical structure of the electronic blackboard shown in FIG. It is an illustration figure which shows an example of the screen displayed on the display shown in FIG. It is an illustration figure for demonstrating the change of the erasure | elimination area | region of an eraser cursor when erasing the handwritten image of a large range. It is an illustration figure for demonstrating the change of the erasure | elimination area | region of an eraser cursor when erasing a small range handwritten image. FIG. 3 is an illustrative view showing one example of a memory map of a RAM shown in FIG. 2. It is an illustration figure which shows an example of an eraser function table. FIG. 3 is a flowchart showing an example of an erase area setting process executed by a CPU shown in FIG. 2. It is an illustration figure which shows an example of the eraser function table in 2nd Example. It is a flowchart which shows an example of the deletion area | region setting process which CPU performs in 3rd Example.

[First embodiment]
Referring to FIG. 1, an electronic blackboard 10 according to a first embodiment of the present invention is also referred to as an interactive whiteboard (IWB) or an electronic whiteboard, and is disposed in a conference room or an education site. The electronic blackboard 10 includes a large display 14 provided with a touch panel 16 on a display surface, and displays (draws) handwritten images such as characters, figures, and symbols input by handwriting on the display 14 on the screen of the display 14. )

  In the first embodiment, the electronic blackboard 10 will be described as an example of the information processing apparatus. However, the information processing apparatus according to the present invention is not limited to the electronic blackboard 10 but various information devices such as a PC and a tablet terminal. Includes electronic equipment.

  In the first embodiment, a case where the touch panel 16 is used as an example of the coordinate input unit will be described. As a coordinate input unit other than the touch panel 16, a pointing device such as a computer mouse, a touch pad, and a pen tablet is used. May be. The information processing apparatus may be provided with a hardware key such as an operation panel or a hardware keyboard as other input means.

  Hereinafter, the configuration of the electronic blackboard 10 will be specifically described. As shown in FIG. 1, the electronic blackboard 10 includes a rectangular plate-shaped housing 12. A display (display device) 14 is provided on the front side of the housing 12. As the display 14, for example, an LCD or an EL (Electro-Luminescence) display can be used. The size of the display surface (screen) of the display 14 is, for example, 60 to 80V type.

A touch panel (coordinate input means) 16 is provided on the display surface of the display 14. The touch panel 16 is a general-purpose touch panel, and an arbitrary type such as a capacitance method, an electromagnetic induction method, a resistance film method, and an infrared method can be used. In the first embodiment, a capacitive touch panel is used as the touch panel 16. In addition, the touch effective range of the touch panel 16 is provided over substantially the entire display surface of the display 14. The user can perform an input operation on the electronic blackboard 10 by operating the touch panel 16 using the electronic pen 18 or fingers (hereinafter, sometimes collectively referred to as “electronic pen 18 etc.”). .

  FIG. 2 is a block diagram showing an electrical configuration of the electronic blackboard 10. As shown in FIG. 2, the electronic blackboard 10 includes a CPU 20. A RAM 22, HDD 24, touch panel control circuit 26, display control circuit 28, and the like are connected to the CPU 20 via a bus 30. Further, the touch panel 16 is connected to the touch panel control circuit 26, and the display 14 is connected to the display control circuit 28.

  Note that a control device (a controller of the electronic blackboard 10) including the CPU 20, RAM 22, HDD 24, and the like may be incorporated in a housing 12 (see FIG. 1) that holds the display 14, the touch panel 16, and the like. May be provided as a separate body (may be externally attached).

  The CPU 20 governs overall control of the electronic blackboard 10. The RAM 22 is used as a work area and a buffer area for the CPU 20. The HDD 24 is a non-volatile memory, and stores an operating system of the electronic blackboard 10 and various control programs such as various application programs, and various data used in the electronic blackboard 10. The CPU 20 writes (stores) the control program and data read from the HDD 24 in the RAM 22 and executes control of each unit constituting the electronic blackboard 10 according to the control program stored in the RAM 22. However, instead of the HDD 24, another nonvolatile memory such as a ROM or a flash memory may be provided.

  The touch panel control circuit 26 applies a necessary voltage to the touch panel 16, detects a touch operation (touch input) within the touch effective range of the touch panel 16, and detects the position of the touch operation (on the screen of the display 14). Touch coordinate data indicating the designated coordinates) is output to the CPU 20. Based on the touch coordinate data input from the touch panel control circuit 26, the CPU 20 generates image data such as characters and graphics handwritten by the user, and determines which function button the user has touched.

  The display control circuit 28 includes a GPU and a VRAM. Under the instruction of the CPU 20, the GPU uses the drawing data 54a and the image generation data 54b (see FIG. 6) stored in the RAM 22 to generate display image data to be displayed on the display 14 in the VRAM, and generates the generated display. The image data is output to the display 14. Therefore, for example, an image such as a character or a graphic input by the user to the touch panel 16 by a touch operation using the electronic pen 18 or the like is displayed on the display 14.

  Such an electronic blackboard 10 can execute various application software including drawing software (pen software) for realizing drawing with the electronic pen 18 or the like. As shown in FIG. 3, when the drawing software is activated, the display surface of the display 14 has a drawing area 40 that can be drawn by the user and a function button area (toolbar) for designating a function used by the user. A screen divided into 42 is displayed. The user can draw handwritten characters or figures on the screen by performing a touch operation on the drawing area 40 using the touch panel 16.

The function button area 42 is provided with various function buttons including a pen button 42a and an eraser button 42b. Although illustration is omitted, the function button area 42 is appropriately provided with function buttons for opening a file, saving and printing, in addition to the pen button 42a and the eraser button 42b.

  The pen button 42a is a button for executing a pen function for handwriting a line (setting a pen mode). Therefore, the user can set the current mode of the electronic blackboard 10 to the pen mode by touching (designating) the pen button 42a using the electronic pen 18 or the like. On the other hand, the eraser button 42b is a button for executing an eraser function for erasing a handwritten line (setting an eraser mode). Therefore, the user can set the current mode of the electronic blackboard 10 to the eraser mode by touching the eraser button 42b using the electronic pen 18 or the like.

  When the electronic blackboard 10 is set to the pen mode, when a user handwrites a character, a figure, or the like in the drawing area 40, a line that follows the locus of handwriting input is displayed (drawn) on the screen. That is, handwritten images such as characters and figures handwritten by the user are displayed on the screen.

  On the other hand, when the electronic blackboard 10 is set to the eraser mode, when the user touches (touches) the electronic pen 18 or the like with respect to the touch panel 16, as shown in FIG. An eraser cursor 44 having a predetermined erase area 46 is displayed, and the handwritten image in the displayed erase area 46 is erased. Then, when a drag (slide) operation is performed to move the electronic pen 18 or the like while being in contact with the touch panel 16, the eraser cursor 44 is also moved accordingly, and the handwritten image in the locus where the erase area 46 is moved is erased. In other words, when handwriting input is performed in the eraser mode, the area following the handwriting input locus is displayed on the screen in the same color as the background color.

  The image erased in the eraser mode (eraser function) is basically a handwritten image such as a character or a figure handwritten by the user in the pen mode (pen function). However, it is also possible to erase an image such as a graphic drawn by designating a graphic button provided in the function button area 42 in the eraser mode.

  Here, although not shown in the drawings, some conventional general electronic blackboards allow the size of the erase area of the eraser cursor to be selected (variable) by designation by a user. For example, in a conventional general electronic blackboard, when the eraser mode is set, when the user touches the eraser button again, a palette including a plurality of eraser buttons having erase areas of different sizes is displayed. The user can designate an eraser button having an erase area of a desired size from among a plurality of eraser buttons displayed on the palette.

  When erasing a handwritten image using such a conventional general eraser function, the user designates (selects) an eraser cursor having a large erasing area and wants to erase an image in a large area, and images in a small area. When the user wants to erase, the eraser cursor having a small erase area is selected. However, it takes time and effort to specify the erase area size of the eraser cursor each time according to the size of the range to be erased.

  Therefore, in the first embodiment, the speed of the drag operation for moving the eraser cursor 44 when the user erases the handwritten image (during image erasure), that is, the touch coordinate data input from the touch panel control circuit 26 to the CPU 20. The size of the erase area 46 of the eraser cursor 44 is changed according to the movement speed of the touch coordinates calculated in this way. That is, in the first embodiment, the moving speed of the touch coordinates (touch operation position) is used as the first operation feature amount that is a determination criterion for changing the size of the erase region 46.

However, simply changing the size of the erasing area 46 according to the movement speed of the touch coordinates as needed does not stabilize the size of the erasing area 46 unless the user performs a drag operation at a constant speed. The problem of being difficult to operate remains.

  Therefore, in the first embodiment, the size of the erase area 46 of the eraser cursor 44 can be fixed at a desired size according to the operation performed when the user erases the handwritten image. Therefore, the user can erase the handwritten image using the eraser cursor 44 having the erase area 46 having a predetermined and desired size until the fixation is released.

  Hereinafter, a method for setting (changing, fixing, and releasing) the size of the erase area 46 of the eraser cursor 44 in the first embodiment will be specifically described with reference to FIGS. 4 and 5.

  Normally, the user moves the eraser cursor 44 quickly and greatly when erasing a large range of handwritten images, and slowly moves the eraser cursor 44 slowly when attempting to erase a small range of handwritten images. Therefore, when the speed of the drag operation for moving the eraser cursor 44, that is, the movement speed of the detected touch coordinates is large, the user is trying to erase a large range of handwritten images, and the eraser cursor 44 having a large erase area 46. Can be estimated. On the other hand, when the speed of the drag operation is low, it can be estimated that the user intends to erase the handwritten image in a small range and desires the eraser cursor 44 having the small erase region 46.

  Therefore, in the first embodiment, the size of the erase area 46 is defined (stored) in advance in association with the movement speed of the touch coordinates, and the larger the movement speed of the detected touch coordinates, the larger the eraser cursor 44 is. The erase area 46 is enlarged (see FIG. 7).

  That is, as shown in FIG. 4, when the movement speed of the touch coordinates is larger than a certain reference value, the size of the erase area 46 of the eraser cursor 44 is larger than the normal size (initial value). To be changed.

  On the other hand, as shown in FIG. 5, when the moving speed of the touch coordinates is smaller than a certain reference value, the size of the erase area 46 of the eraser cursor 44 is changed to be smaller than the normal size. The At this time, when the size of the erasing area 46 is made smaller than a predetermined size, the shape of the erasing area 46 is deformed from a square to a circle. As described above, when the size of the erasing area 46 is reduced, by making the shape of the erasing area 46 circular, it is easy to correct a fine portion.

  However, an upper limit value and a lower limit value are provided for the size of the erasing area 46, and the size of the erasing area 46 is equal to or larger than the upper limit value or the lower limit value even if the movement speed of the touch coordinates exceeding or below the predetermined value is detected. It will not be less than the value. Further, as the moving speed of the touch coordinates, it is preferable to use an average moving speed every 1 to 2 seconds. This is because if the moving speed between the detected two touch coordinates is used, the size of the erase region 46 frequently changes and it is difficult to operate.

In the first embodiment, when the user erases the handwritten image, the eraser cursor 44 is stopped for a predetermined time or longer, that is, the time when the touch coordinates are detected at the same position (the touch coordinate movement stop time) is predetermined. When it is detected that the time is over, the size and shape of the erase area 46 of the eraser cursor 44 are fixed. That is, in the first embodiment, the movement stop time of the touch coordinates is used as the second operation feature amount that is a determination criterion for fixing the size (and shape) of the erase area 46. When the size of the erase area 46 of the eraser cursor 44 reaches a desired size, the user stops the drag operation for moving the eraser cursor 44 for a predetermined time, thereby reducing the size of the erase area 46 to the desired size. You can fix it.

  Further, in the first embodiment, when the user erases the handwritten image with the size of the erase area 46 of the eraser cursor 44 fixed, the drag operation is touched off, that is, the touch coordinates are detected. Is detected from the on state (detected state) to the off state (non-detected state), the state in which the size and shape of the erase region 46 are fixed is released. That is, in the first embodiment, the presence / absence of touch coordinates is used as the third operation feature amount serving as a determination criterion for canceling the fixing of the size (and shape) of the erase region 46. The user touches off the touch panel 16 to release the fixation, and then again touches the touch panel 16 with the electronic pen 18 or the like to perform a drag operation to move the eraser cursor 44, thereby increasing the size of the erase area 46 of the eraser cursor 44. Can be changed.

  FIG. 6 shows an example of the memory map 50 of the RAM 22 shown in FIG. As shown in FIG. 6, the RAM 22 includes a program storage area 52 and a data storage area 54. The program storage area 52 stores control programs such as a coordinate detection program 52a, a drawing program 52b, an erasing program 52c, an erasing area changing program 52d, an erasing area fixing program 52e, and an erasing area fixing release program 52f.

  The coordinate detection program 52a acquires touch coordinate data indicating the position of the touch operation on the touch panel 16 (indicated coordinates on the screen of the display 14) output from the touch panel control circuit 26, and stores it in the data storage area 54 according to time series. It is a program to do. However, the coordinate detection program 52 a is also a program for detecting the indicated coordinates on the screen of the display 14 based on a click operation with a mouse or the like of a computer connected to the electronic blackboard 10.

  The drawing program 52b generates display image data based on the touch coordinate data (drawing data 54a) and the image generation data 54b output from the touch panel control circuit 26, and the characters and graphics input by the user with the electronic pen 18 or the like. This is a program for displaying the handwritten image of on the screen of the display 14.

  The erasing program 52c is a program for erasing the handwritten image on the screen of the display 14. That is, the erasing program 52c generates display image data based on the touch coordinate data output from the touch panel control circuit 26, and is an area according to a point or locus input by the user with the electronic pen 18 or the like on the display 14 screen. This is a program for displaying (the erase area 46 of the eraser cursor 44) in the same color as the background color.

  The erase region change program 52d detects the first operation feature amount based on the touch coordinate data output from the touch panel control circuit 26, and the size of the erase region 46 of the eraser cursor 44 according to the detected first operation feature amount. And a program for changing the shape. In the first embodiment, the erase area changing program 52d detects the movement speed of the touch coordinates, and changes the size and shape of the erase area 46 of the eraser cursor 44 based on the detected movement speed of the touch coordinates.

  The erase area fixing program 52e detects the second operation feature amount based on the touch coordinate data output from the touch panel control circuit 26, and erases the eraser cursor 44 when the detected second operation feature amount satisfies a predetermined condition. This is a program for fixing the size and shape of the region 46. In this first embodiment, the erasure area fixing program 52e detects the touch coordinate movement stop time, and when the detected touch coordinate movement stop time is equal to or longer than a predetermined time, the size of the erase area 46 of the eraser cursor 44 is large. Fix the height and shape.

  The erase area fixing cancellation program 52f detects the third operation feature quantity based on the touch coordinate data output from the touch panel control circuit 26, and when the detected third operation feature quantity satisfies a predetermined condition, the erase area fixation program This is a program for releasing the size and shape of the erase area 46 of the eraser cursor 44 by 52e. In the first embodiment, the erasure area fixing program 52e detects that the detection of the touch coordinates is changed from the on state to the off state (non-detection state), and when the touch coordinates are in the non-detection state, the eraser The fixing of the size and shape of the erase area 46 of the cursor 44 is released.

  Although not shown, the program storage area 52 also stores other programs necessary for execution of control processing (information processing) of the electronic blackboard 10.

  The data storage area 54 stores data such as drawing data 54a, image generation data 54b, and eraser function data 54c.

  The drawing data 54a is time-series data of touch coordinates detected according to the coordinate detection program 52a. For example, the drawing data 54a is touch coordinate data for characters and figures input by handwriting by the user using the touch panel 16, and manages a point by a tap or a line by a drag (slide) for each point or line.

  The image generation data 54 b is data such as polygon data and texture data for generating display image data corresponding to various screens displayed on the display 14. The image generation data 54b also includes image data for various icons (buttons) such as the function button area 42.

  The eraser function data 54c is data used when changing (setting) the size and shape of the erase region 46 of the eraser cursor 44. Specifically, as shown in FIG. 7, in the eraser function table according to the eraser function data 54c, the size of the erase area 46 and the shape of the erase area 46 are described in association with the moving speed of the touch coordinates.

  In the first embodiment, the movement speed of the detected touch coordinates is classified (replaced) into one of 10 stages, and the larger the movement speed, the larger the size of the erase area 46. In addition, the size and shape of the erasing area 46 in the section where the moving speed is “4 to 5 (4 or more and less than 5)” are set as initial values. That is, if the moving speed is a speed equal to or higher than the section in which the moving speed is “5 to 6 (5 or more and less than 6)”, the size of the erase area 46 is changed to be larger than the initial value, and the moving speed is “3 to 3”. If the speed is equal to or lower than the section of “4 (3 or more and less than 4)”, the size of the erase area 46 is changed to be smaller than the initial value. In addition, if the moving speed is a speed that is equal to or higher than a section where “2 to 3 (2 or more and less than 3)”, the shape of the erasure region 46 is a square, and the moving speed is “1 to 2 (1 or more and less than 2)”. If the speed of the erasing area 46 becomes smaller than a predetermined size at a speed equal to or lower than the division, the shape of the erasing area 46 is made circular.

  Although not shown, the data storage area 54 is provided with other data necessary for the execution of each control program described above, and a timer (counter) and a register required for the execution of each control program are provided. Or

Then, an example of operation | movement of the above electronic blackboards 10 is demonstrated using a flowchart. FIG. 8 is a flowchart showing an example of an erase area setting process executed by the CPU 20 of the electronic blackboard 10 when the handwritten image drawn in the pen mode is erased in the eraser mode. In this erase area setting process, the size and shape of the erase area 46 of the eraser cursor 44 are set. Although illustration is omitted, the image erasing process for erasing the handwritten image in the movement locus of the erasing area 46 is executed in parallel with the erasing area setting process shown in FIG.

  As shown in FIG. 8, when the user touches the eraser button 42b during the execution of the drawing software, the CPU 20 sets the current mode to the eraser mode and starts this erase area setting process. First, in step S1, it is determined whether or not to end the eraser mode. For example, the CPU 20 determines to end the eraser mode when the user touches another function button such as the pen button 42a. If “YES” in the step S1, the erase area setting process is ended as it is. On the other hand, if “NO” in the step S1, the process proceeds to a step S3.

  In step S3, it is determined whether a touch operation has been detected. That is, the CPU 20 determines whether or not there is touch coordinate data output from the touch panel control circuit 26 and indicating the position of the touch operation on the touch panel 16 (indicated coordinates on the screen of the display 14). If “NO” in the step S3, the process returns to the step S1. On the other hand, if “YES” in the step S3, that is, if a touch operation is detected, the process proceeds to a step S5.

  In step S5, the initial value of the erase area 46 of the eraser cursor 44 is acquired with reference to the eraser function data 54c, and the size and shape are the initial values around the touch coordinates (indicated coordinates) detected in step S3. The eraser cursor 44 having the erase area 46 set to “” is displayed on the screen of the display 14.

  In a succeeding step S7, it is determined whether or not the touch coordinates are changed for a predetermined time. That is, the CPU 20 determines whether or not the touch coordinate movement stop time, which is the time during which the touch coordinates are continuously detected at the same position, is equal to or longer than a predetermined time (for example, 1 second). If “YES” in the step S7, the process proceeds to a step S17 described later. On the other hand, if “NO” in the step S7, that is, if the touch coordinates are changed (moved) within a predetermined time, the process proceeds to a step S9. However, when the touch coordinate position is not detected within a predetermined time without moving the touch coordinate position, that is, when the user taps the touch panel 16 (short press), the steps described later are performed. The process of S9 to S21 is omitted, and the process returns to step S1.

  In step S9, the movement speed of the touch coordinates is calculated (detected). That is, the CPU 20 refers to the drawing data 54a, which is time series data of touch coordinates, and calculates, for example, an average moving speed every 1 to 2 seconds as a moving speed of touch coordinates. This moving speed is classified (converted) into one of 10 stages.

  In subsequent step S11, the eraser function data 54c is referred to, and information regarding the size and shape of the erased region 46 corresponding to the movement speed of the touch coordinates calculated in step S9 is acquired. In step S13, the eraser cursor 44 having the erase area 46 set in the size and shape acquired in step S11 is displayed on the screen of the display 14.

  In a succeeding step S13, it is determined whether or not the touch operation is in a detection state. Here, the CPU 20 determines whether or not the detection of the touch coordinates is changed from the on state (detected state) to the off state (non-detected state), that is, whether the touch coordinate is not touched off.

If “NO” in the step S13, that is, if the touch is off, the process proceeds to a step S21. In step S21, the size and shape of the current (most recent) erase area 46 are stored in the RAM 22 or the like as initial values for the next touch detection, and the process returns to step S1. In addition, when the size and shape of the erasure area 46 are fixed in step S17 described later, the CPU 20
In step S21, the fixing is released. On the other hand, if “YES” in the step S15, the process returns to the step S7.

  If “YES” is determined in the step S7, that is, if the movement stop time of the touch coordinates is equal to or longer than a predetermined time, the size and shape of the erasing area 46 are fixed in a step S17. That is, when “YES” is determined in the step S7, the CPU 20 maintains the current size and shape of the erased region 46 without performing the processes in the above-described steps S9 to S13.

  In a succeeding step S19, it is determined whether or not the touch operation is in a detection state, that is, whether or not the touch operation is not performed. If “NO” in the step S19, that is, if the touch is off, the process proceeds to a step S21. On the other hand, if “YES” in the step S19, the process returns to the same step S19, and waits until the touch-off is performed, that is, until the size and shape of the erase area 46 are released.

  As described above, according to the first embodiment, the eraser is used in accordance with the moving speed (first operation feature value) of the touch coordinates (indicated coordinates) when the user erases the handwritten image using the eraser cursor 44. When the size and shape of the erase area 46 of the cursor 44 are changed and when it is detected that the touch coordinate movement stop time (second operation feature amount) is equal to or longer than the predetermined time, the erase area 46 of the eraser cursor 44 is detected. Fix the size and shape of the. That is, in addition to changing the size and shape of the erase area 46 of the eraser cursor 44 based on the user's operation during image erasure, it is also possible to fix the eraser 46 with a desired size and shape. Operability is improved.

[Second Embodiment]
The electronic blackboard 10 of the second embodiment is the same as the electronic blackboard 10 of the first embodiment except that the method of changing the size of the erase area 46 of the eraser cursor 44 is different according to the movement speed of the touch coordinates. The contents different from those of the first embodiment will be described, and redundant description will be omitted.

  In brief, in the first embodiment described above, the size of the erasing area 46 is changed so as to have a preset size according to the moving speed of the touch coordinates. In contrast, in the second embodiment, as shown in FIG. 9, the first predetermined value and the second predetermined value are set in advance for the moving speed of the touch coordinates. If the movement speed of the touch coordinates is equal to or greater than the first predetermined value, the size of the erase area 46 is changed so as to gradually increase, is equal to or greater than the second predetermined value, and is less than the first predetermined value. If so, the current size of the erase area 46 is maintained, and if it is less than the second predetermined value, the size of the erase area 46 is gradually decreased.

  Therefore, in the second embodiment, as the time for the user to move the eraser cursor 44 quickly increases, the erase area 46 gradually increases, and as the time for the eraser cursor 44 to move slowly increases, the erase area 46 increases. Gradually gets smaller. Such conditions (regulations) for changing the size of the erase area 46 are stored in, for example, an eraser function table according to the eraser function data 54c.

  According to this 2nd Example, there exists an effect similar to 1st Example, and the operativity of an eraser function improves. In addition, since the size of the erase region 46 is gradually changed, the size of the erase region 46 can be easily fixed at a desired size.

In the second embodiment, the size of the erasing area 46 is changed in three modes of “gradually increasing”, “maintaining”, and “gradually decreasing” according to the moving speed of the touch coordinates. However, the mode to change is not limited to this. For example, it may be changed in two modes of “gradually increasing” and “gradually decreasing”. In addition, for example, the mode of “gradually increasing” is divided into two modes of “swiftly increasing” and “slowly increasing”, or the mode of “gradually decreasing” is “swiftly decreasing” and “slowly decreasing”. It may be divided into two modes of “Yes”.

[Third embodiment]
The electronic blackboard 10 according to the third embodiment is the same as the electronic blackboard 10 according to the first embodiment except that the second operation feature amount serving as a criterion for fixing the size of the erase area 46 of the eraser cursor 44 is different. The contents different from those of the first embodiment will be described, and redundant description will be omitted.

  Briefly, in the first embodiment described above, the movement stop time of the touch coordinates is detected as the second operation feature amount, and the movement of the eraser cursor 44 is detected when the movement stop time of the detected touch coordinates is equal to or longer than a predetermined time. The size and shape of the erase area 46 were fixed. On the other hand, in the third embodiment, the number of touch coordinates detected simultaneously at a position separated by a predetermined value or more as the second operation feature amount is detected, and when the detected touch coordinates are 2 or more, the eraser cursor The size and shape of the 44 erase regions 46 are fixed. That is, in the third embodiment, the size and shape of the erase area 46 of the eraser cursor 44 are fixed on condition that the multi-touch is detected when the user erases the handwritten image using the eraser cursor 44. To do. For example, the user can fix the size and shape of the erase area 46 of the eraser cursor 44 by touching another part of the touch panel 16 with the left hand while operating the eraser cursor 44 using the right hand.

  FIG. 10 is a flowchart illustrating an example of the erase area setting process executed by the CPU 20 of the electronic blackboard 10 according to the third embodiment. As shown in FIG. 10, the CPU 20 executes the process of step S27 instead of step S7 of FIG. That is, after displaying the eraser cursor 44 in step S5, the CPU 20 determines whether or not multi-touch is detected in step S7. If “NO” in the step S27, that is, if multi-touch is not detected, the process proceeds to a step S9. On the other hand, if “YES” in the step S27, that is, if multi-touch is detected, the process proceeds to a step S17.

  In addition, since the process of step S1-step S5 and step S9-step S21 is the same as the content shown in 1st Example, the overlapping description is abbreviate | omitted.

  According to the third embodiment, similar to the first embodiment, the same operational effects as the first embodiment can be obtained, and the operability of the eraser function is improved. Further, since the user can fix the size and shape of the erase area 46 of the eraser cursor 44 by multi-touch, the size and shape of the erase area 46 can be fixed more smoothly.

  In the above-described embodiment, when the size and shape of the erase area 46 are released, the size and shape of the erase area 46 at that time are adopted as the initial values at the next touch detection. However, the present invention is not limited to this. When the size and shape of the erase area 46 are released, the size and shape of the erase area 46 may be returned to the original initial values set in advance.

In the above-described embodiment, the moving speed of the touch coordinates is used as the first operation feature amount that is a determination criterion for changing the size of the erase area 46 of the eraser cursor 44. However, the present invention is not limited to this. For example, as the first operation feature amount, the amount of movement of the touch coordinates in the same direction, that is, the stroke length until the direction changes at a predetermined angle or more from the direction of movement (the length of the locus of the touch coordinates until it is reversed or bent) ) Can also be used.

  Further, in the above-described embodiment, the touch coordinate movement stop time or the number of touch coordinates detected at the same time is used as the second operation feature amount serving as a determination reference for fixing the size of the erase area 46 of the eraser cursor 44. However, it is not limited to this. For example, the presence / absence of touch coordinates is detected as the second operation feature amount, and it is detected that the detection of the touch coordinates has changed from an on state (detected state) to an off state (non-detected state), that is, touch-off is detected. In this case, the size and shape of the erasing area 46 may be fixed. Further, for example, the movement direction of the touch coordinates is detected as the second operation feature amount, and it is detected that the movement direction has changed by a magnitude of a predetermined angle or more, that is, the eraser cursor 44 is reversed (folded) or bent. When the movement is detected, the size and shape of the erase region 46 may be fixed. Further, for example, when the position of the touch coordinate is detected as the second operation feature amount and it is detected that the position is outside the drawable range, the size and shape of the erasure area 46 may be fixed. Good.

  Furthermore, in the above-described embodiment, the presence / absence of touch coordinates is used as the third operation feature amount that serves as a determination criterion for canceling the fixing of the size of the erasure area 46. However, the present invention is not limited to this. As the third operation feature amount, the same as the second operation feature amount, that is, the touch coordinate movement stop time, the number of touch coordinates detected simultaneously, the touch coordinate movement direction, the touch coordinate position, and the like can be used. .

  In the above-described embodiment, different types of feature quantities are used for the second operation feature quantity and the third operation feature quantity. However, the second operation feature quantity and the third operation feature quantity are the types described above. Therefore, different feature amounts may be employed, or the same feature amount may be employed. That is, the condition for fixing the size of the erase area 46 and the condition for canceling may be different or the same. As an example, the number of touch coordinates that are simultaneously detected may be employed as the second operation feature amount and the third operation feature amount, respectively. That is, if multi-touch is detected in a state where the size of the erase area 46 can be changed, the size of the erase area 46 is fixed, and then the multi-touch is performed with the size of the erase area 46 fixed. If it is detected again, the size of the erase area 46 may be changed.

  Furthermore, the specific numerical values and screen configurations described in the above-described embodiments are merely examples, and can be appropriately changed according to the actual product.

10 ... Electronic blackboard (information processing equipment)
14 ... Display (display device)
16. Touch panel (coordinate input means)
20 ... CPU
22 ... RAM
24 ... HDD
26 ... Touch panel control circuit 28 ... Display control circuit 44 ... Eraser cursor 46 ... Erase area

Claims (5)

An information processing device that displays an image on a display screen of a display device,
An input detection unit provided on a display screen of the display device for detecting a user's touch input;
A process execution unit for executing a drawing mode for displaying a drawing on the display screen based on the locus of the touch input, and an erasing mode for erasing the drawing based on the locus of the touch input;
With
The process execution unit displays an erase area for the erase process at the position of the touch input in the erase mode, and when the movement of the erase area is detected by the input detection unit, according to the movement An information processing apparatus, wherein the size of the erase area is changed, the erase area is displayed, and the size of the erase area is fixed when a predetermined input is detected.   2. The input according to claim 1, wherein the predetermined input is one of an input in which the movement stop time of the position where the touch input is detected is a predetermined time or more and an input in which the movement direction of the position changes. Information processing device.   When the movement speed is larger than a preset reference value, the process execution unit changes the size of the erase area to be larger than an initial value, and the movement speed is set in advance. 3. The information processing apparatus according to claim 1, wherein when the value is smaller than a reference value, the information processing apparatus is changed so as to be smaller than the initial value.   The processing execution unit is provided with an upper limit value and a lower limit value in the size of the erase area, and the size of the erase area is determined even if the input detection unit detects a moving speed exceeding or below a predetermined value. The information processing apparatus according to claim 1, wherein the information processing apparatus is configured not to be larger than an upper limit value or smaller than a lower limit value.   The information processing apparatus according to claim 1, wherein when the size of the erase area is smaller than a predetermined size, the process execution unit deforms the shape of the erase area into a circle.

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