JP2003346171A - Rendering device and rendering program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve use feeling or operability of a tablet. <P>SOLUTION: A rendering device 100 is equipped with a coordinate value detection part 502 including a tablet plate and a tablet pen for inputting a coordinate onto the tablet plate, for detecting a coordinate value of the coordinate inputted by the tablet pen, a shade information extraction part 505 for extracting shade information corresponding to surface irregularities of a material supposed as the ground, which is the shade information of a region corresponding to the coordinate value detected by the coordinate value detection part 502, and an image rendering part for rendering an image acquired by attaching a shade to a brush pattern based on the shade information extracted by the shade information extraction part 505 by using a rendering color designated by a rendering color designation part 506. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a drawing apparatus and a drawing program, and more particularly to a drawing apparatus and a drawing program using a tablet.

[0002]

2. Description of the Related Art Heretofore, there has been known a computer provided with various drawing functions using a computer. For example, it has been possible to draw outlines of lines and figures on a computer screen, or to paint, overwrite, and superimpose using each color. Here, in order to make the operation feeling more intuitive, coordinate input is sometimes performed using a so-called tablet. Using a tablet enabled more intuitive operation than when using a mouse, making it possible to achieve on a computer a drawing task with a feeling similar to drawing with a real writing tool or drawing tool such as a paintbrush or pastel. .

However, the prior art has the following problems. In other words, the conventional tablet-based drawing device simply replaces the mouse with a tablet and pursues hardware-like simulatedness, and can reproduce the operational feeling including the drawing texture expressed on the monitor. Was not.

[0003] The present invention has been made in view of the above, and has as its object to improve the usability or operability of a tablet. More specifically, an object of the present invention is to appropriately reproduce a drawing texture using solid paint such as chalk and a drawing texture when using oil paint. It is another object of the present invention to easily perform color drawing near the outline of a line drawing.

[0004]

According to another aspect of the present invention, there is provided a drawing apparatus comprising: a tablet having a coordinate input surface and coordinate input means for inputting coordinates with respect to the coordinate input surface; A drawing device for performing drawing according to a locus of a brush pattern that is a basic shape of drawing, a drawing color specifying means for specifying a drawing color, and coordinates for detecting a coordinate value of coordinates input by the coordinate input means Value detection means, and density information extraction means for extracting density information corresponding to the coordinate value detected by the coordinate value detection means and density information corresponding to the surface irregularities of the material assumed as the base, Image drawing for drawing an image in which the brush pattern is shaded based on the shade information extracted by the shade information extraction means, using the shade color designated by the shade color designation means Characterized by comprising a stage, a.

That is, the invention according to claim 1 reproduces a drawing texture of a solid paint by blurring or shading expression reflecting irregularities of a base.

According to a second aspect of the present invention, there is provided the drawing apparatus according to the first aspect, wherein the crayon, the chalk,
Shading information storage that stores shading information determined based on blurring or shading when drawn on at least one base material of paper, canvas, and panel by at least one solid writing implement of a pencil or contepass Means, wherein the density information extraction means uses the density information stored by the density information storage means.

In other words, the invention according to claim 2 reproduces a variety of drawing textures having a high correlation with the case where a real object is used, based on shading information reflecting the actual combination of the unevenness of the base material and the solid paint.

According to a third aspect of the present invention, in the drawing apparatus according to the first or second aspect, the pressure is detected when the coordinate input means is inputting coordinates to the coordinate input surface. And a density increasing / decreasing means for increasing / decreasing the density of a brush pattern to be rendered by the image rendering means by a predetermined value in accordance with the pressure detected by the pressure detecting means.

That is, the invention according to claim 3 performs dense drawing when the pen pressure is high, and reproduces rough drawing when the pen pressure is low, as in the case of drawing with solid paint such as chalk.

A drawing apparatus according to a fourth aspect of the present invention includes a tablet having a coordinate input surface and coordinate input means for inputting coordinates with respect to the coordinate input surface, and a locus of a brush pattern which is a basic shape of drawing. A drawing color specifying means for specifying a drawing color; a coordinate value detecting means for detecting a coordinate value of the coordinates input by the coordinate input means; Image drawing means for embossing a predetermined shading pattern and drawing a brush pattern with brightness unevenness at a position corresponding to the coordinate value detected by the coordinate value detecting means, using the drawn color, Overwriting control means for performing control to sequentially overwrite the brush pattern drawn by the image drawing means in correspondence with the locus on the coordinate input surface of the coordinate input means. The features.

That is, the invention according to claim 4 reproduces the drawing texture of an oil painting by expressing unevenness by a shaded contour in a brush pattern.

According to a fifth aspect of the present invention, in the drawing apparatus according to the fourth aspect, a pressure for detecting a pressure when the coordinate input means is inputting coordinates to the coordinate input surface is provided. And a brush pattern changing means for changing the size or shape of the brush pattern according to the pressure detected by the pressure detecting means.

In other words, in the invention according to claim 5, as in the case of drawing with a paintbrush with oil paint, the brush pattern is deformed so that the drawing area increases when the pen pressure is high,
If the pen pressure is low, the brush pattern is deformed so that the drawing area becomes small.

According to a sixth aspect of the present invention, there is provided a drawing apparatus including a tablet having a coordinate input surface and coordinate input means for inputting coordinates with respect to the coordinate input surface, wherein a locus of a brush pattern as a basic shape of drawing is provided. A coordinate value detecting means for detecting a coordinate value of the coordinates input by the coordinate input means, and the brush at a position corresponding to the coordinate value detected by the coordinate value detecting means. Image drawing means for drawing a pattern, original image data storage means for storing original image data to be an original image for superposition, and whether or not coordinates by the coordinate input means are continuously input to the coordinate input surface. Input determination means for determining whether or not input has been interrupted; and a block drawn by the drawing means when the input determination means determines that input of coordinates is continued. The superimposition control means for performing control to draw the sipatterns sequentially on the original image and drawing the coordinates is stored by the original image data storage means when the input determination means determines that the input of coordinates is interrupted. And a re-polymerization control unit for performing control to further superimpose and draw the original image based on the original image data on the image which is superimposed and drawn by the superimposition control unit. .

That is, according to the invention of claim 6, the original image is not blurred or buried by the line drawing added later, and it is possible to perform drawing without necessitating any special consideration near the contour of the original image. A drawing operation can be performed while confirming a clear original image.

According to a seventh aspect of the present invention, in the drawing apparatus according to the sixth aspect, the coordinate input means is formed in a pen shape, and one end of the coordinate input means inputs coordinates on the coordinate input surface. A drawing device which draws a line drawing by a brush pattern when inputting, and wherein the other end of the coordinate input means erases the drawn line drawing when inputting coordinates to the coordinate input surface; The other end input determining means for determining whether or not coordinates are input by the other end; and the coordinate value detecting means when the other end input determining means determines that coordinates are input. Restoring means for restoring an image of an area corresponding to the coordinate values detected by the above to an image of only the original image portion based on the image data stored by the original image data storage means. And

That is, in the invention according to claim 7, when the drawing is erroneous, the original image is restored by detecting that the coordinate input means is inverted and rubbed on the coordinate input surface like a pencil with an eraser. .

Further, the drawing program according to the present invention uses the output signal from the tablet having a coordinate input surface and coordinate input means for inputting the coordinates to the coordinate input surface to generate a basic drawing shape. A program for drawing a certain brush pattern according to its locus, the computer comprising: a drawing color specifying unit for specifying a drawing color; a coordinate value detecting unit for detecting a coordinate value of coordinates input by the coordinate input unit; The shade information extracting means for extracting the shade information corresponding to the coordinate value detected by the coordinate value detecting means and the shade information corresponding to the surface unevenness of the material assumed as the base, and the drawing color specifying means An image drawing for drawing an image in which the brush pattern is shaded based on the shade information extracted by the shade information extracting means, using a designated drawing color. It characterized in that to function as a unit.

That is, the invention according to claim 8 reproduces the drawing texture of the solid paint by blurring and shading reflecting the unevenness of the base.

According to a ninth aspect of the present invention, in the drawing program according to the ninth aspect, the density information extracting means uses a solid writing instrument of at least one of a crayon, a chalk, a pencil, and a contepass to form a paper,
It is characterized in that shading information determined based on blur or shading when drawn on at least one base material of a canvas or a panel is used.

That is, according to the ninth aspect of the present invention, various textures having a high correlation with a case where a real object is used are reproduced by shading information reflecting an actual combination of unevenness of a base material and a solid paint.

According to a tenth aspect of the present invention, in the drawing program according to the eighth or ninth aspect, according to the pressure when coordinates are input to the coordinate input surface by the coordinate input means, It is characterized in that it functions as a density increasing / decreasing means for increasing / decreasing the density of a brush pattern to be rendered by the image rendering means by a predetermined value.

That is, in the invention according to claim 10, as in the case of drawing with a solid paint such as chalk, dense drawing is performed when the pen pressure is high, and coarse drawing is reproduced when the pen pressure is low.

Further, the drawing program according to the present invention uses the output signal from the tablet having a coordinate input surface and coordinate input means for inputting the coordinates to the coordinate input surface, using the output signal from the tablet. A program for drawing a certain brush pattern according to its locus, the computer comprising: a drawing color specifying unit for specifying a drawing color; a coordinate value detecting unit for detecting a coordinate value of coordinates input by the coordinate input unit; Using the drawing color specified by the drawing color specifying unit, a brush pattern is drawn at a position corresponding to the coordinate value detected by the coordinate value detecting unit by embossing a predetermined shading pattern to give brightness unevenness. Image drawing means, and the brush pattern drawn by the image drawing means is sequentially overwritten in correspondence with the locus on the coordinate input surface of the coordinate input means. It characterized in that to function as an overwrite control means for performing control.

That is, according to the eleventh aspect of the present invention, the texture of an oil painting is reproduced by expressing unevenness by a shaded contour in a brush pattern.

According to a twelfth aspect of the present invention, in the drawing program according to the eleventh aspect, the brush is set according to a pressure when the coordinate input means is inputting coordinates to the coordinate input surface. It is characterized by functioning as a brush pattern changing means for changing the size or shape of the pattern.

That is, in the twelfth aspect of the present invention, similarly to the case of drawing with a paintbrush with oil paint, the brush pattern is deformed so that the drawing area becomes large when the pen pressure is high, and The brush pattern is deformed so that the area becomes smaller.

A drawing program according to a thirteenth aspect uses an output signal from a tablet having a coordinate input surface and coordinate input means for inputting coordinates with respect to the coordinate input surface to generate a basic drawing shape. A drawing program for drawing a certain brush pattern according to its locus, comprising: a computer for detecting coordinate values of coordinates input by the coordinate input means; and a coordinate value detected by the coordinate value detecting means. Image drawing means for drawing the brush pattern at a position corresponding to the image data, original image data storage means for storing original image data serving as an original image for superposition, and coordinates by the coordinate input means with respect to the coordinate input surface. Input determination means for determining whether input has been continued or input of coordinates has been interrupted, and the input determination means determines that coordinates have been continuously input. In this case, it is determined that the input of the coordinates has been interrupted by the superimposition control means for performing control to sequentially draw the brush pattern drawn by the drawing means on the original image and the input determination means. In this case, based on the original image data stored by the original image data storage unit, a control is performed to further superimpose and draw the original image on the image superimposed and drawn by the superimposition control unit. It is characterized by functioning as polymerization control means.

That is, according to the invention of claim 13, the original image is not blurred or buried by the line drawing added later, and it is possible to perform drawing without necessitating any special consideration near the contour of the original image. A drawing operation can be performed while confirming a clear original image.

According to a fourteenth aspect of the present invention, in the drawing program according to the thirteenth aspect, one end of the coordinate input means is provided by using an output signal from a tablet in which the coordinate input means is formed in a pen shape. A drawing program for drawing a line drawing by a brush pattern when inputting coordinates on the coordinate input surface, and erasing the drawn line drawing when the other end of the coordinate input means inputs coordinates on the coordinate input surface. Wherein the other end input determining means for determining whether or not coordinates have been input by the other end with respect to the coordinate input surface, and that the coordinates have been input by the other end input determining means. If it is determined, the image of the area corresponding to the coordinate value detected by the coordinate value detecting means is determined based on the image data stored by the original image data storing means. Te, characterized in that to function as a restoring means for restoring the image of the original image portion only.

That is, the invention according to claim 14 detects that the coordinate input means is reversed and rubbed on the coordinate input surface like a pencil with an eraser when the drawing is erroneous,
Restore the original image.

[0032]

Embodiments of the present invention will be described below in detail with reference to the drawings. Embodiment 1 FIG. In the first embodiment, the drawing apparatus or drawing program of the present invention is applied to a computer system, and its external configuration, hardware configuration, functional configuration (particularly, functional configuration related to solid paint hard-core drawing mode), processing The flow will be described sequentially.

(Drawing Apparatus: External Appearance Configuration) FIG. 1 is an explanatory diagram showing an example of an outline configuration of a drawing apparatus according to the present invention. The drawing apparatus 100 includes a main body device 101 that performs an operation related to drawing processing, a tablet plate 102 having a coordinate input surface for receiving a coordinate input, a tablet pen (stylus pen) 103 for inputting coordinates on the coordinate input surface, A display device 104 for displaying a drawing result, and a keyboard 105
And a mouse 106. Hereinafter, the tablet plate 102 and the tablet pen 103 will be appropriately referred to as a tablet 150. Note that the configuration may be such that the keyboard 105 and the mouse 106 are omitted depending on the mode of use.

The main unit 101 receives the information on the coordinates output from the tablet 150 and executes the corresponding functions. Specifically, it performs functions based on normal mouse actions such as clicking, double-clicking, right-clicking, dragging, and scrolling based on information about coordinates. , And erase the drawn image. The drawing expression or software processing will be described later. As the main device 101, various computers including a personal computer can be used. Therefore, the main device 101 can be regarded as a computer device having an enhanced function as a drawing device. By using a personal computer or the like as described above, it is possible to easily design the drawing apparatus 100.

The tablet plate 102 is a tablet pen 1
The input of coordinates by No. 03 is detected, and the position information (absolute position information or relative position information) is transmitted to the main body device 101 side, and plays a role as an auxiliary input device when implementing various functions. In addition, the tablet pen 103 plays a role as an auxiliary input device when inputting coordinates to the tablet board 102 by touching or approaching a predetermined coordinate input area on the tablet board 102.

FIG. 2 is an explanatory diagram showing a configuration example of a tablet (tablet plate and tablet pen). The tablet board 102 has one-to-one correspondence with the screen of the display device 104 and receives a coordinate input from the tablet pen 103, a pen stand 122 for standing the tablet pen 103, and a detection signal for the presence or absence of coordinate input. And a transmission line 123 for transmitting coordinate values and the like to the main device 101. In addition to the above-described detection signals and coordinate values, the tablet board 102 generates a signal such as a normal mouse signal such as a right-click, left-click, double-click, and drag by the tablet pen 103 and a signal related to an eraser function described later. (Not shown). Here, generation of coordinate values and determination of coordinate input detection are performed on the tablet 1.
The embodiment performed on the 02 side has been described, but may be executed on the main device 101 side depending on the mode of use.

The tablet pen 103 has a coordinate input surface 12
A pen tip 131 provided with a pen pressure sensor for reproducing the actual feeling of use of a pen or a paintbrush when inputting coordinates to 1, an eraser section 132 used for providing an eraser function (eraser mode) described later, and a mouse , And a side switch 134 for generating a double-click signal. Needless to say, the side switches can be assigned in various ways, and the side switch 133 may be set to left-click and the side switch 134 may be set to right-click. In this embodiment, the tablet 150 is designed to read by an electromagnetic induction method (electromagnetic transfer function method), and is designed so that the writing pressure is 512 steps, the reading speed is 200 times per second, and the readable height is 5 mm. ing. Therefore, it can be said that the coordinate input surface 121 is formed from a position 5 mm above the physical substance surface.

Further, as shown in FIG.
The 3 and the side switch 134 are integrally formed as a seesaw switch, but are not limited thereto and may be separate switches or buttons. Tablet pen 1
03 is detected on the tablet board 102 side, and transmitted from the signal generation unit to the main unit 101. Although the pen pressure sensor is provided on the tablet pen 103 side here, the pen pressure sensor may be configured to detect the pen pressure on the coordinate input surface 121 side.

The functions of the tablet pen 103 include a pen pressure function described above and an eraser function described later.
A tilt detecting function for detecting a tilt of the tablet pen 103 with respect to the coordinate input surface 121;
A device ID function for individually recognizing each tablet pen when operating on a single coordinate input surface 121,
A rotation detection function for detecting rotation with respect to the pen shaft may be provided. Further, the device ID function can be assigned to each pen tool of the application software and used when a plurality of pens are selectively used without setting a menu each time.

The display device 104 displays various processing results (drawing results) executed by the main device 101. As the display device 104, a liquid crystal monitor or a CRT monitor can be used. In the case of performing in a large conference hall, a projector can be employed.

The keyboard 105 is used for text input and command input as necessary. The mouse 106 is used when various instructions are given by a normal computer operation other than drawing.

In this embodiment, the tablet plate 10
A description will be given of a mode in which coordinate input is performed by using the tablet pen 2 and the tablet pen 103, but various coordinate input devices (coordinate input systems) can be employed as the tablet. That is, in the present invention, the tablet inputs coordinates using a means (coordinate input means) capable of inputting coordinates on the coordinate input surface irrespective of a virtual coordinate input surface or a physical coordinate input surface. Anything should do. Therefore, the method of detecting the input of coordinates is not particularly limited, and an electric type or a magnetic type that detects an input by an electric or magnetic change, an optical type that detects the intensity or weakness of light, and the like are adopted. can do.

The coordinate input surface 121 and the display device 104
May be integrally configured as a so-called touch panel or liquid crystal pen tablet. FIG. 3 is a diagram showing an external configuration of a liquid crystal pen tablet in which a coordinate input surface and a display device are integrally formed. As shown, since the coordinate input surface 121 and the display device 104 are integrated, the operator can use the tablet pen 103 to make the display surface extremely intuitive as if it were a paper, canvas, or panel. Can be drawn.

(Drawing Apparatus: Hardware Configuration) Next, the hardware configuration of the drawing apparatus 100 will be described. FIG. 4 is an explanatory diagram showing an example of a hardware configuration of the drawing apparatus of the present invention. The drawing apparatus 100 has a CPU 401, a ROM 402, an RA
M403, hard disk (HD) 404, graphics card 405, tablet board 102, tablet pen 103, display device 104, keyboard (K / B) 105, mouse (MOUSE) 106,
Having.

The CPU 401 controls the whole of the drawing apparatus 100 together with an OS to be described later, and controls various software processes. Specifically, for example, the CPU 4
01 executes various functions set at the position of the coordinates based on the coordinate information from the tablet 150 according to a program stored in the hard disk 404 or the ROM 402. The CPU 401 also performs drawing control for the VRAM (image RAM) of the graphics card 405, control for temporarily storing work data stored in the hard disk 404 in the RAM 403, and the like.

The ROM 402 stores a boot program and the like. Depending on the mode of use, the ROM 402 may store a control program for the tablet 150. The RAM 403 is used as a work area of the CPU 401. Specifically, various programs read from the hard disk 404 are temporarily stored. In addition, the RAM 403 stores the tablet board 102 and the mouse 1
06, and temporarily stores the coordinate information received therefrom. This information is used as auxiliary information when executing a function corresponding to the corresponding application or icon. In particular, in the present invention, it is also used as information for determining the center of the brush pattern.

The hard disk 404 includes an operating system (OS), application programs,
Various software programs (software) such as drivers are stored. The contents of the software stored in the hard disk 404 will be described later.

The graphics card 405 sends an image signal to be output to the display device 104. The graphics card 405 includes a VR that stores an image signal to be output.
It also has an AM and an image output interface (image output I / F) for outputting the processed image signal to the display device 104. In operation, the image output I / F outputs RGB image data developed in the VRAM to the display device 104.

Although not shown, the drawing apparatus 100
Is an input interface (input I / F) for performing input control of coordinate information input to the coordinate input surface 121.
Also have. The input I / F is, for example, RS232C, US
A connection mode such as B can be adopted. Note that, based on the coordinate information input from the coordinate input I / F, CP
Various processes including a drawing process are executed via the OS of the U 401 and the hard disk 404 and corresponding applications.

Although not shown, the drawing apparatus 100
Is a flexible disk drive, CD-ROM
It is also possible to mount a drive device, an MO drive device, and the like.

The hard disk 404 includes an OS 441,
The drawing software 442 for realizing various drawing modes such as reproducing the drawing texture by the combination of the pen type and the base material, and the driver software 443 for controlling the tablet 150 to be usable by the drawing apparatus 100 are stored. other than this,
The hard disk 404 stores various software such as word processing software and spreadsheet software.

The driver software 443 is installed on the tablet 15
The signal generated at 0 is emulated as a mouse event, and is controlled so that it can be interpreted by the OS 441. In addition, control is performed such that each point on the coordinate input surface 121 has a one-to-one correspondence with the coordinate space managed by the OS. . When calculating the coordinate position, the tablet 150 may grasp the coordinate values and transmit the coordinate values to the main device 101, or a predetermined signal from the tablet 150 may be received by the main device 101, A configuration in which the coordinate values are grasped on the device 101 side may be used.

(Functional Configuration of Drawing Apparatus 100) Next, the functional configuration of the drawing apparatus 100 will be described. The drawing device 100 includes drawing software 44 linked with the tablet 150.
In accordance with 2, drawing is performed in various drawing modes. The drawing mode can be broadly divided into a drawing execution mode for reproducing a drawing of various pens and a paintbrush, and an erasing mode (eraser mode) for erasing a line drawing drawn in the drawing execution mode. The drawing execution mode includes solid paint hard-core (solid writing implement) drawing modes such as pencils, crayons, and chalks, liquid paint hard-core drawing modes such as felt pens, ink pens, and markers, and liquid paints such as watercolor and oil painting. It can be subdivided into a soft core drawing mode, a spray drawing mode such as airbrush and spray, and a computer graphics (CG) drawing mode such as solid, pipeline, iridescent.

The solid paint hard core system means a paint that can be regarded as a solid and has a hard contact portion with a base material (paper, canvas, panel, etc.) written with the paint.
In addition, the liquid paint hard core system refers to a paint that can be regarded as a liquid and has a hard contact portion with a base material written with the paint. In addition, the liquid paint soft core system means a paint that can be regarded as a liquid and has a soft contact portion with a base material written with the paint.

In the first embodiment, a description will be given of the "solid paint hard core drawing mode" which has not been reproduced conventionally on a computer system. An oil painting mode in which a portion already drawn below in the paint soft core drawing mode is sequentially overwritten ”is described.
The erasing mode linked to the operation 0 will be described.

FIG. 5 is an explanatory diagram showing an example of a functional configuration for realizing a solid paint hard core drawing mode among the functional configurations of the drawing apparatus of the first embodiment. Drawing device 1
Reference numeral 00 denotes a coordinate input unit 501 and a coordinate value detection unit 502 as a functional configuration for realizing a solid paint hard core drawing mode.
And a shade information storage unit 503 and a brush pattern determination unit 50
4, a shade information extraction unit 505, and a drawing color designation unit 506
, A pressure detecting unit 507, a density increasing / decreasing unit 508, and an image drawing unit 509.

The coordinate input section 501 inputs coordinate information.
The coordinate information is information input to the tablet board 103, and includes the coordinate value itself or information necessary for calculating the coordinate value. The erasing mode, continuous input time, and the like can also be included. Coordinate input unit 501
Is, for example, the tablet 150, the driver software 44
3 can realize the function.

The coordinate value detecting section 502 includes a coordinate input section 501.
Detects the coordinate value of the coordinates input in. The coordinate values may be absolute coordinates or relative coordinates. The coordinate system is based on the resolution (800 × 60) set by the OS 441.
0 pixels, 1024 × 768 pixels, etc.) or an actual measurement value (the coordinate input surface 121 is 127 mm ×
99 mm, and the reading resolution is ± 0.25 mm, mm measurement value). The function of the coordinate value detection unit 502 can be realized by, for example, the tablet 150, the RAM 402, the OS 441, the driver software 443, and the like.

The density information storage unit 503 stores density information determined on the basis of unevenness of a base material such as paper, canvas (cloth), and panel (plastic). In order to reproduce the texture of the drawing, it is preferable that the shading information is determined not only by simply using the unevenness as it is, but also by taking into consideration the characteristics of a writing instrument such as a pencil, a crayon, a contepass, and a paintbrush. For example, even when drawing is performed with the same pen pressure on the same drawing paper using a pencil and a crayon, the texture of drawing is different. Similarly,
Since the drawing quality is different between H and B even for the same pencil, the mode is such that shading information is provided for each.

When crayon is used, the base material is usually assumed to be a drawing paper, but it is also possible to store density information when this is drawn on Kent paper or a canvas. In this way, it is possible to express a drawing texture of a combination that is not assumed in the actual painting material, and it is possible to provide a new drawing expression.

FIG. 6 is a table showing an example of combinations of information on the writing implement and the background material stored in the density information storage section. The alphabet in the chart indicates the identifier of the grayscale information to be referred to. Among them, the shade information bearing an alphabet other than e indicates a combination that can be a real drawing, and the shade information bearing an e indicates a combination that cannot be normally combined in a real drawing. 7, 8 and 9 show the crayon (K3) and the chalk (C
FIGS. 1A and 1B are explanatory diagrams each showing an example of shading information of a pencil (P1). As shown in the figure, the grayscale information can be said to be information including each coordinate and the grayscale value of the grayscale corresponding to the coordinate. In FIGS. 7 to 9, the grayscale information is a part, but the grayscale information storage unit 503 stores grayscale information of the entire coordinate input surface 121. Here, density information of a certain size is repeatedly spread over the coordinate input surface 121.
Although it is possible to use the shade information of the entire surface, in some cases the edge of the shade information floats regularly, so in order to create a more natural expression, do not use repetition, and use the shade information determined over the entire surface. Can also be adopted.

On the other hand, in order to intentionally represent "wrinkles" of drawing paper or Japanese paper, background information representing a large number of borders may be used. FIG. 10 is an explanatory diagram showing an example of background information for reproducing wrinkle information. The density information storage unit 503 can realize its function by, for example, the drawing software 442, the HD 404, and the RAM 403.

The brush pattern determination unit 504 determines a brush pattern to be used in the drawing execution mode. The brush pattern refers to the basic shape of drawing. For example, pencils, crayons, chalks, felt-tip pens, ink pens, markers, watercolor paint brushes, oil paint brushes, air brushes, shapes used when drawing sprays (circles, spindles, ellipses, rectangles, etc.)
Say. When the tablet pen 103 is provided with a rotation detecting function and a tilt detecting function, a mode in which the brush pattern is changed according to the rotation and the tilt may be employed. The brush pattern determination unit 504, for example,
0, the function can be realized by drawing software or the like.

The grayscale information extracting unit 505 includes a coordinate value detecting unit 5.
The density information of the area of the brush pattern determined by the brush pattern determination unit 504, which is the density information of the background around the position corresponding to the coordinate value detected in 02, is extracted. The drawing apparatus 100 assumes a base material and extracts the unevenness information (shade information) of only a certain area corresponding to the position where the coordinates are input, so that the processing load is small. In particular, when the tablet pen 103 has an inclination detection function and a rotation detection function, the processing load is unavoidably increased, and depending on the system, smooth drawing may not be realized in some systems. Therefore, even with such a system, smooth drawing can be realized.

Further, in the prior art, since only the fixed density information set in the brush pattern was used, it was not possible to express the density based on the fine irregularities of the base material. Shading based on fine irregularities of the material can be expressed. Shading information extraction unit 505
The functions can be realized by, for example, the CPU 401, the RAM 402, and the drawing software 442.

The drawing color specifying section 506 specifies a drawing color. In addition, a mode in which one color is designated may be used, but since the brush pattern has a certain area, a plurality of colors may be designated. For example, when the brush pattern has a spindle shape, a light blue color may be assigned to the upper right portion, and a dark blue color may be assigned to other portions. By such an arrangement, especially the oil painting expression can be effectively reproduced. The function of the drawing color designation unit can be realized by the tablet 150 and the drawing software 442, for example.

The pressure detecting unit 507 includes the tablet pen 10
3 detects the pressure when the coordinates are input to the coordinate input surface 121. The shading increasing / decreasing unit 508 includes the pressure detecting unit 5
In accordance with the pressure detected at 07, the density of the brush pattern to be drawn by the image drawing unit 509 is increased or decreased by a predetermined value. Specifically, when the pressure is high or when the pressure is high, the density information is raised by a predetermined value corresponding to the pressure in the entire region, and dense drawing is performed. Conversely, when the pressure is low or when the pressure is low, the density information is lowered by a predetermined value corresponding to the pressure in the entire area, and rough drawing is performed.
From such a viewpoint, this shade information can be paraphrased as transparency in some cases. In other words, the shade information can be said to be information for determining how dark (transparency) the color specified by the drawing color specifying unit 506 is to be superimposed on the color of the base material. Here, although the density information is increased / decreased, a mode in which a gradation value such as lightness, saturation, luminance or the like may be changed depending on the mode of use.

The pressure detecting section 507 is provided for the tablet 150
The function can be realized by the driver software 443 and the like. The density increasing / decreasing unit 508 is a CPU 401
The driver software 443 and the drawing software 442 can realize the function.

The image drawing unit 509 includes a drawing color designation unit 506.
Using the drawing color specified by
The shade pattern is drawn by changing the shade gradation value by a predetermined amount by the shade increasing / decreasing unit 508 as appropriate based on the shade pattern added based on the shade information extracted in step 5. The output of drawing is the display device 1.
Although the process is performed on the image data 04, the image data may be directly output to a printer and drawn depending on the mode of use. Image drawing unit 509
The functions can be realized by, for example, the CPU 401, the drawing software 442, the graphics card 405, the display device 104, and the like.

FIGS. 11, 12, and 13 show examples of drawing in the crayon mode, the choke mode, and the pencil mode, respectively. In each drawing mode, drawing was performed using the grayscale information shown in FIGS. 7, 8, and 9. As is clear from the figure, instead of the conventional writing instrument-dependent shading,
The shading depending on the base material is expressed. Although the drawing texture in the solid paint hard-core drawing mode has been described above, the present technology is not limited to this, and can be applied to any drawing that wants to make use of the “eye” of the base material. For example, even in the liquid paint soft-core drawing mode, the present invention can be applied to, for example, the case of watercolor drawing.

(Processing Flow of Drawing Apparatus 100) Next, a processing flow of the drawing apparatus 100 will be described. FIG.
FIG. 3 is an explanatory diagram showing an example of a processing flow of the drawing apparatus 100. The drawing apparatus 100 first recognizes the coordinate values of the coordinates input to the coordinate input surface 121 (Step S140)
1). Next, density information of a corresponding area (brush pattern), which is density information previously specified as background information based on the recognized coordinate values, is extracted (step S1).
402). At this time, the light and shade information extracted according to the pen pressure may be appropriately processed. Finally, the brush pattern is colored with the designated drawing color, and the shaded image information is output to a predetermined output destination (display device 104) (step S14).
03).

As described above, according to the drawing apparatus 100 of the first embodiment, it is possible to reproduce the texture of the base material which has not been reproduced on the computer system conventionally, with a good texture. Further, by using the table shown in FIG. 6, a combination of a writing instrument and a base material, which has not been assumed in the related art, can be expressed, and a new drawing texture unique to a computer system can be provided.

Embodiment 2 In the second embodiment, in particular,
An oil painting mode in which a portion already drawn below in the liquid paint soft core drawing mode is sequentially overwritten will be described.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted unless otherwise specified. The drawing apparatus according to the second embodiment is described as a drawing apparatus 200.

(Functional Configuration of Drawing Apparatus 200) FIG.
FIG. 9 is an explanatory diagram showing an example of a functional configuration for realizing an oil painting mode, among functional configurations of the drawing apparatus according to the second embodiment; The drawing apparatus 200 includes a coordinate input unit 501, a coordinate value detection unit 502, a brush pattern determination unit 504, a drawing color designation unit 506, a pressure detection unit 507, a brush pattern Change part 1
501, an image drawing unit 1502, and an overwrite control unit 1503
And

The brush pattern changing unit 1501 enlarges or reduces the size of the brush pattern determined by the brush pattern determining unit 504 or changes the shape of the brush pattern according to the pressure detected by the pressure detecting unit 507. Specifically, when the pressure is high, the brush pattern is enlarged in a similar shape, and when the pressure is low, the brush pattern is reduced in a similar shape. When the tablet pen 103 has an inclination detection function, when the tablet pen 103 is raised with a high writing pressure from a lying state, the brush pattern shape is changed so that the bristle ends are widened. That is, the brush pattern changing unit 1501 changes the brush pattern according to the pen pressure, inclination, and rotation. The function of the brush pattern changing unit 1501 can be realized by, for example, the CPU 401, the driver software 443, the drawing software 442, and the like.

The image drawing unit 1502 includes a drawing color designation unit 50
The brush value changed by the brush pattern changing unit 1501 using the drawing color designated by 6 and the brush pattern to which the brightness unevenness is given by the predetermined embossing process is detected by the coordinate value detecting unit 502. Draw at the position corresponding to the coordinate value. This brush pattern is created by preparing a distribution pattern of predetermined transparency (shading) or a distribution pattern of saturation, and performing emboss processing on this. The predetermined distribution pattern may be a pattern fixedly set in advance, or may be dynamically determined based on a density distribution (concavo-convex distribution) of a base material that differs for each coordinate position as in the first embodiment. It may be a pattern. However, in the oil painting mode, if attention is paid to the fact that the pattern at the time of starting drawing with a paintbrush is easily maintained, the same brush pattern that has been embossed from the start of the input of the coordinates of the tablet pen 103 to the end thereof is used. It is preferred to use Note that the same brush pattern that has been embossed may be continuously changed by the brush pattern changing unit 1501.

FIG. 16 is an explanatory diagram showing a part of a brush pattern in which a predetermined transparency distribution pattern is embossed to give brightness unevenness. As shown in the figure, by embossing a brush pattern having a transparency distribution (see FIG. 16A), the outline of the transparency is enhanced, and a shadow similar to a three-dimensional drawing is obtained (FIG. 16B). reference). This gradation value distribution is used as lightness information. The drawing apparatus 100 includes a functional unit that performs emboss processing inside, and may use a differential filter such as a primary differential filter or a secondary differential filter as appropriate. Therefore, in this case, for example, based on the brush pattern determined by the brush pattern determination unit 504 and the coordinate position detected by the coordinate value detection unit 502, the gradation, density, brightness, or saturation in the brush pattern area An oil paintbrush producing unit may be provided that performs emboss processing on the value to produce a brush pattern with brightness unevenness (lightness unevenness is emphasized).

Further, the image drawing section 1502 may combine and use the original transparency distribution brush in addition to the embossed brush. For example, the brightness may be assigned to the embossed brush, and the transparency may be assigned to the gradation value of the transparency distribution brush to change the brush pattern. The image drawing unit 1502 includes, for example,
The functions can be realized by the CPU 401 and the drawing software 442 or the like.

The overwriting control unit 1503 includes the image drawing unit 150
Control is performed to sequentially overwrite the brush pattern drawn in step 2 with the locus on the coordinate input surface 121 of the tablet pen 103. This is because oil painting, unlike watercolor painting, takes into account the property of paint that the original line drawing will not be visible if the user overwrites an already drawn part. Therefore, in the case of using a computer system, it is necessary to always perform control for displaying an image to be drawn on the foreground, and the overwrite control unit 1503 realizes this function. In addition,
A major advantage of using a computer system is the undo function. This is a function of moving the work state back one time or a plurality of times, and can be realized by separately recognizing the latest drawing and the previous drawing as in the overwrite control unit 1503. Overwrite control unit 1503
The functions can be realized by, for example, the CPU 401, the RAM 402, the drawing software 442, the graphics card 405, the display device 104, and the like.

FIG. 17 is an explanatory diagram showing a drawing example of the drawing apparatus 200 in the oil painting mode. As shown in the drawing, the light and shade as if drawn with an actual paintbrush are well reproduced.

(Processing Flow of Drawing Apparatus 200) Next, a processing flow of the drawing apparatus 200 will be described. FIG.
FIG. 5 is an explanatory diagram showing an example of a processing flow of the drawing apparatus 200. The drawing apparatus 100 first recognizes the coordinate values of the coordinates input to the coordinate input surface 121 (Step S180)
1). Next, an embossing process is performed in accordance with the gradation value distribution of the transparency of the brush pattern, the brightness pattern is applied, and a brush pattern prepared in advance is read (step S1802). Note that a step of dynamically embossing may be provided as described above. Subsequently, the brush pattern is colored with the designated drawing color (step S1803). At this time, the gradation value distribution of the saturation is used as it is as the saturation, and the embossed gradation value distribution is colored as lightness. Finally,
Control is performed to sequentially overwrite the brush pattern for which the brightness, saturation, and color are determined in accordance with the locus of the tablet pen 103 (step S1804).

As described above, according to the drawing apparatus 200 of the second embodiment, it is possible to reproduce the oil painting which has not been reproduced on the computer system conventionally, with a good texture.

Embodiment 3 In the third embodiment, a description will be given of an erasing mode linked to a tablet operation. In the third embodiment, the same components as those in the first embodiment or the second embodiment are denoted by the same reference numerals and the description thereof will be omitted unless otherwise specified. Further, regarding the drawing apparatus of the third embodiment, the drawing apparatus 30
It shall be described as 0.

(Functional Configuration of Drawing Apparatus 300) FIG.
FIG. 9 is an explanatory diagram showing an example of a functional configuration for realizing an erasing mode linked to an operation of a tablet, among functional configurations of the drawing apparatus according to the third embodiment; Drawing device 3
00 is a coordinate input unit 501, a coordinate value detection unit 502,
A drawing attribute designation unit 1901, an image drawing unit 1902, an input determination unit 1903, an overlap control unit 1904, an original image data storage unit 1905, a re-stack control unit 1906, another end input determination unit 1907, and a restoration unit 1908.

The drawing attribute specifying section 1901 specifies drawing attributes such as the color and shape of a brush pattern and the shading of the background at the time of drawing. Functionally, the brush pattern determining unit 504, the grayscale information extracting unit 505, the drawing color specifying unit 506, the grayscale increasing / decreasing unit 5
08, a process realized by at least one of the brush pattern changing units 1501 is performed. The function of the drawing attribute designation unit 1901 can be realized by, for example, the tablet 150, the drawing software 442, or the like.

The image drawing unit 1902 includes a drawing attribute designation unit 1
The brush pattern of the drawing attribute specified by 901 is drawn at a position corresponding to the coordinate value detected by the coordinate value detection unit 502. The drawing here includes virtual drawing in a coordinate space virtually assumed on a computer system, and it is not always necessary to finally draw and display using the graphics card 405 and the display device 104. It does not do. The image drawing unit 1902 includes, for example, a CPU
401, RAM 402, drawing software 442, and OS
441 and the like can realize that function.

The input determination unit 1903 determines whether the coordinate input
Then, it is determined whether coordinates are continuously input by the tablet pen 103 or whether the input of coordinates is interrupted. That is, the input determination unit 1903 determines whether the tablet pen 103 is tracing the coordinate input surface 121 or the tablet pen 103 is separated from the coordinate input surface 121 (whether the pen is up). The input determination unit 1903
For example, tablet 150, driver software 443,
The function can be realized by the OS 441 or the like.

The overlap control unit 1904 controls the coordinate input surface 121
When the input determination unit 1903 determines that the coordinates have been input continuously, control is performed so that the brush patterns drawn by the image drawing unit 1902 are sequentially superimposed on the original image and drawn. The original image is the original image data storage unit 190
5 is an image set by the operator as a basic image. For example, when creating a poster, line drawings of people, landscapes, characters, etc. may be drawn first, and then the line drawing may be used to separate the colors. It refers to a basic image such as a person, a landscape, a character, etc., related to the work content immediately before shifting to the work.

The re-polymerization control unit 1906 is provided with the input judgment unit 19
If it is determined that the input of coordinates is interrupted by 03,
Based on the original image data stored in the original image data storage unit 1905, control is performed to further superimpose and draw the original image on the image superimposed and drawn by the superimposition control unit 1904. Therefore, the tablet pen 10
Since the original image is overwritten again when the pen 3 is pen-uped from the tablet board 102, it is not necessary to change the momentum of the brush at the outline portion, and a free drawing texture can be obtained. In a case where the outline itself is a light color, the image data of the corresponding portion drawn by the superimposition control unit 1904 may be discarded and newly re-superimposed (redrawn) so that the colors do not overlap.

FIG. 20 is an explanatory diagram for explaining the control contents when the original image is drawn in the crayon mode. FIG.
(A) is a figure showing an original image. FIG. 20 (b)
FIG. 11 is a diagram when drawing is being performed in the crayon mode (during drawing by the tablet pen 103). As is clear from the figure, since the drawing is also performed where the outline of the line drawing was displayed, the overlapping part is displayed in a mixed color,
The outline is blurred and the appearance is dirty. FIG. 20C is a diagram when the pen is raised (a diagram of the re-polymerization result by the re-polymerization control unit 1906). Since the original drawing is redrawn, the outline is restored.

In the prior art, for example, in the case of watercolor painting, the brush momentum was modulated at the contour portion of the original image because of too much concern about mixing of colors or mispainting. A drawing texture can be realized. In this regard, it can be said that an operational feeling beyond the conventional real-world drawing is realized.

Polymerization control section 1904 and repolymerization control section 1
906 includes, for example, the CPU 401 and the drawing software 44.
2, the graphics card 405, and the display device 104
Such a function can be realized by such means. The original image data storage unit 1905 includes, for example, a RAM 402 and an HD4
04 or the like can realize that function.

The drawing apparatus 300 also has an eraser mode, and this function is realized by the re-polymerization control unit 1906, the other end input determination unit 1907, and the restoration unit 1908. The eraser mode is the eraser section 1 of the tablet pen 103.
32 is inputting coordinates on the coordinate input surface 121,
A mode in which a line drawing of a traced portion is erased along the locus.

The other end input determination unit 1907 outputs the coordinate input surface 1
It is determined whether or not coordinates have been input to 21 by the eraser unit 132. For example, when the tablet 150 has a tilt detection function, this determination can be made based on the tilt. The other end input determination unit 1907 includes, for example, a tablet 150, driver software 443,
The function can be realized by an OS or the like.

When the other end input determination unit 1907 determines that the coordinates have been input, the restoration unit 1908 is an image of an area corresponding to the coordinate values detected by the coordinate value detection unit 502, and The image portion drawn by the superimposition control unit 1906 is restored to an image of only the corresponding original image portion based on the image data stored in the original image data storage unit 1905. That is, in the eraser mode, only the overwritten drawing portion is erased while leaving the original image. FIG. 21 is an explanatory diagram showing a drawing result when the coordinate input surface 121 is traced in the eraser mode from the drawing state shown in FIG. As shown in the figure, the original image portion is not erased, so that it is also possible to appropriately overwrite (correct) the drawing mode again with the pen tip 131.

By controlling in this way, it is possible to realize a drawing texture different from the undo function of the computer system. The eraser mode is for the tablet pen 1
Since this is linked with the 03, it is possible to improve the operability of the drawing apparatus 300 by eliminating the complexity such as the eraser mode selection that has been realized by a plurality of icon clicks and pull-down selections as in the past. Becomes The function of the restoration unit 1908 can be realized by the CPU 401, the RAM 402, the drawing software 442, and the like.

The original image is stored in the image drawing unit 509, the image drawing unit 1502, the image drawing unit 1902, and the superimposition control unit 19.
04, an image drawn by any of the re-polymerization control units 1906 can be adopted. That is, the original image can be set by appropriately storing the drawing result up to a certain point in the original image data storage unit 1905.

(Processing Flow of Drawing Apparatus 300) Next, the flow of processing of the drawing apparatus 300 will be described. FIG.
FIG. 3 is an explanatory diagram showing an example of a processing flow of the drawing apparatus 300. The drawing apparatus 300 first appropriately draws an image to be an original image (step S2201). The original image is not particularly limited to a black line drawing, and may be drawn in any manner using, for example, the functions of the drawing apparatus described above. Therefore, there is no problem even if it is colored.

Next, the drawn original image is stored as image data (step S2202). When storing,
A menu “set as original image” is provided by the drawing software 442 as appropriate, and a save operation is performed. Subsequently, a drawing operation such as coloring is performed in the drawing execution mode, and the tablet pen 10 is operated.
While the user continues inputting the coordinates, the brush pattern is overlaid on the original image sequentially (step S220).
3) Upon receiving the pen-up, the original image stored in step S2202 is overwritten (step S2204).

In the eraser mode, when it is detected that the coordinates of the eraser portion 132 of the tablet pen have been input, only the original image portion is redrawn corresponding to the locus of the eraser portion 132.

As described above, according to the drawing apparatus 300 of the third embodiment, drawing directly linked to the movement of the tablet pen 103 can be performed, and operability beyond the feeling of use when using a real object is provided. It becomes possible.

Up to now, the first to third embodiments have been described.
Until now, each function of the drawing device has been described.
As shown in FIG. 4, the function can be realized by a single piece of software. FIG. 23 shows the drawing software 442.
FIG. 4 is an explanatory diagram showing an example of a screen configuration. Pen tab 2301
Provides a drawing mode selection screen. As shown, the drawing mode is divided into a drawing execution mode and an eraser mode.
Solid mode icon, felt pen mode icon, ink pen mode icon, pencil mode icon, crayon mode icon, chalk mode icon, marker mode icon, watercolor mode icon, oil painting mode icon, airbrush mode icon, spray mode icon, pipeline mode icon, rainbow mode icon A color mode icon is provided, and when each icon is pressed, a transition is made to each drawing mode. At this time, the brush pattern (initial value) is also determined. When the eraser mode icon 2312 is pressed, the mode shifts to the eraser mode.

As shown, the drawing color selection unit 23
In 02, various drawing colors can be selected. In the brush pattern scaling section 2303, the size of the brush pattern can be changed. In the drawing mode, for example, in the oil painting mode or the watercolor mode, the contact surface of the paintbrush can be changed by the pen pressure or rotation, and the brush pattern provided by the brush pattern scaling unit 2303 is used only as an initial value. It may be. In the drawing area on the right side of the figure, a drawing execution mode selection icon group 2
In each drawing execution mode, the character of m,
An upper right arrow and a horizontal bar are drawn. Here, the arrows were drawn with increasing pen pressure as the writing progressed. In addition, the tablet pen 103 was stagnated for a while in the vicinity of the center while drawing with substantially the same pen pressure for the horizontal bar, and thereafter drawing was performed to the end.

As is clear from the figure, in the choke mode, which is a solid paint hard core drawing mode, the higher the writing pressure, the darker (dense) the drawing. It can be seen that the size has not changed. Conversely, in oil paint mode, which is a liquid paint soft-core drawing mode, the brightness and density of the drawing do not change even if the pen pressure is high, but the size of the brush pattern itself changes according to the pen pressure. I understand. As described above, in the drawing apparatus of the present invention, it is possible to perform drawing with an enhanced texture.

The drawing apparatus 100, the drawing apparatus 200, and the drawing apparatus 300 may form an intermediate color drawing with a base material or a line drawing already drawn by so-called α blending. The α blend is a predetermined α (x, y) (0 <α
With (x, y) <1), the following composite color value P3 (x, y) is calculated for two color values P1 (x, y) and P2 (x, y) to be drawn at the same position. To do. P3 (x, y) = P1 (x, y) × α (x, y) + P
2 (x, y) × (1−α (x, y)) Here, the color value can be adopted as various gradation values. For example, in addition to lightness, saturation, and color, CIE L
Various color system gradation values such as a ^* b ^* and Lu ^* v ^* can be used.

Therefore, the image drawing unit 509 and the image drawing unit 1
502, overwriting control unit 1503, image drawing unit 1902, superposition control unit 1904, re-superposition control unit 1906, restoration unit 19
08, this α blending technique can be adopted as appropriate. With such control, for example, in the watercolor mode, it is possible to reproduce the texture of the base material or overwrite on the already drawn line drawing with good texture.

In modes other than the oil painting mode, the drawing color is constant P2 (P2 (x, y) = P2const) regardless of the position.
P3 (x, y) = P1 (x, y) × α (x, y) + P
2const × (1−α (x, y)). In addition, when the canvas has a rough texture, an α blend is used to
"Eye" of the base, which has both functions of 0 and the drawing device 200
It is also possible to adopt a mode of reproducing a drawing texture utilizing the above.

Further, even in the erase mode, the eraser 13
Instead of erasing the portion where 2 has passed, it may be set so that an image re-polymerized by the α blend is left a little. In this way, when you erase a pencil line with the eraser, you draw (erase) the same as moving the eraser back and forth several times to erase it
Texture can be realized. In addition, "kneading eraser" in the drawing
A method of blurring a line drawing using a brush or a brush is used, but the same drawing texture can be achieved.

[0109] Each of the above functional units can be realized as a computer program. That is, the computer system can function as means for realizing each functional unit. The distribution mode of the program is CD-RO.
It is not limited to a recording medium such as M and can be distributed through an electric line such as the Internet.

[0110]

As described above, the drawing apparatus of the present invention (claim 1) includes a tablet having a coordinate input surface and coordinate input means for inputting coordinates with respect to the coordinate input surface. A drawing device that draws according to a locus of a brush pattern that is a basic shape, wherein a drawing color designation unit includes:
The drawing color is designated, the coordinate value detecting means detects the coordinate value of the coordinates input by the coordinate input means, and the density information extracting means detects the coordinate value of the area corresponding to the coordinate value detected by the coordinate value detecting means. The shade information is extracted, and the shade information corresponding to the surface irregularities of the material assumed as the base is extracted, and the image drawing means uses the drawing color designated by the drawing color designation means, and the shade information extraction means Since the brush pattern is drawn based on the extracted shading information, the brush pattern is drawn with shading, and it is possible to reproduce the drawing texture of the solid paint by shading or shading expression reflecting the unevenness of the base.
It is possible to improve the usability or operability of the tablet.

Further, the drawing apparatus of the present invention (claim 2)
2. The drawing apparatus according to claim 1, wherein the density information storage means is drawn on at least one base material of paper, canvas, and panel by at least one solid writing implement of crayon, chalk, pencil, and contepath. The density information determined based on the shading or shading at the time of storing is stored, and the density information extracting means uses the density information stored by the density information storing means. By using the grayscale information reflecting the combination of the above, it is possible to reproduce a variety of drawing textures having a high correlation with the case where the real object is used, thereby improving the usability or operability of the tablet.

The drawing apparatus of the present invention (claim 3)
3. The drawing apparatus according to claim 1, wherein the pressure detecting means detects a pressure when coordinates are input to the coordinate input surface by the coordinate input means, and the density increasing / decreasing means detects the pressure. According to the pressure detected by the means, the density of the brush pattern to be drawn by the image drawing means is increased or decreased by a predetermined value, so that, as in the case of drawing with solid paint such as chalk, dense drawing is performed when the writing pressure is high. If the writing pressure is low, coarse drawing can be reproduced, and thereby the usability or operability of the tablet can be improved.

The drawing apparatus of the present invention (claim 4)
A drawing device that includes a tablet having a coordinate input surface and coordinate input means for inputting coordinates with respect to the coordinate input surface, and performs drawing in accordance with a locus of a brush pattern that is a basic shape of drawing. Specifying the drawing color, the coordinate value detecting means detects the coordinate value of the coordinates input by the coordinate input means, and the image drawing means uses the drawing color specified by the drawing color specifying means, At a position corresponding to the coordinate value detected by the coordinate value detecting means, a predetermined shade pattern is embossed to draw a brush pattern with brightness unevenness, and the overwriting control means is drawn by the image drawing means. The brush pattern is controlled so as to sequentially overwrite the brush pattern corresponding to the locus on the coordinate input surface of the coordinate input means. It can be reproduced picture quality feeling, which makes it possible to improve the usability or operability of the tablet.

The drawing apparatus of the present invention (Claim 5)
5. The drawing apparatus according to claim 4, wherein the pressure detecting means comprises:
The pressure when the coordinate input means is inputting coordinates with respect to the coordinate input surface is detected, and the brush pattern scaling means expands or reduces the brush pattern according to the pressure detected by the pressure detecting means. As with drawing with a paintbrush with oil paint, the brush pattern deforms so that the drawing area increases when the pen pressure is high, and the brush pattern deforms so that the drawing area decreases when the pen pressure is low. This makes it possible to improve the usability or operability of the tablet.

The drawing apparatus according to the present invention (claim 6)
A drawing device that includes a tablet having a coordinate input surface and coordinate input means for inputting coordinates with respect to the coordinate input surface, and performs drawing according to a locus of a brush pattern that is a basic shape of drawing, wherein the coordinate value detecting means is Detecting the coordinate values of the coordinates input by the coordinate input means; and drawing the brush pattern at a position corresponding to the coordinate values detected by the coordinate value detecting means, and storing the original image data. Means for storing original image data to be an original image for superimposition, and input determining means for determining whether or not the coordinates input by the coordinate input means are continuously input to the coordinate input surface or the input of the coordinates is interrupted. When the superimposition control means determines that the coordinates have been continuously input by the input determination means, the brush pattern drawn by the drawing means is placed on the original image. Perform control to draw the next superposition, the re-polymerization control means, when it is determined that the input of the coordinates has been interrupted by the input determination means, based on the original image data stored by the original image data storage means, Since the original image is controlled so as to be further superimposed and drawn on the image drawn by being superimposed by the superposition control means, the original image is not blurred or buried by a line drawing added later, It is possible to perform drawing without any special consideration in the vicinity of the outline of the tablet and to perform drawing work while checking the clear original image, thereby improving the usability or operability of the tablet. Become.

The drawing apparatus of the present invention (claim 7)
7. The drawing device according to claim 6, wherein the coordinate input means is formed in a pen shape, and one end of the coordinate input means draws a line drawing by a brush pattern when inputting the coordinates on the coordinate input surface. The other end of the input means is a drawing device for erasing a drawn line image when inputting coordinates to the coordinate input surface, and the other end input determination means is configured to execute the coordinate by the other end with respect to the coordinate input surface. It is determined whether or not is input, and when the restoring means determines that the coordinates are input by the other end input determining means, the restoring means corresponds to the coordinate value detected by the coordinate value detecting means. The image of the area
Based on the image data stored by the original image data storage means, the original image is restored to the image of only the original image part, so if the drawing is incorrect, the coordinate input means is inverted like a pencil with an eraser and the coordinate input surface Sense that it was rubbed,
The original image can be restored, thereby improving the usability or operability of the tablet.

A drawing program according to the present invention (claim 8) provides a basic drawing method by using an output signal from a tablet having a coordinate input surface and coordinate input means for inputting coordinates to the coordinate input surface. A program for drawing a brush pattern as a shape according to its locus, comprising: a computer; drawing color specifying means for specifying a drawing color; and coordinate value detecting means for detecting coordinate values of coordinates input by the coordinate input means. Density information extraction means for extracting density information of an area corresponding to the coordinate value detected by the coordinate value detection means, the density information corresponding to surface irregularities of a material assumed as a base; and the drawing color designation Means for drawing an image in which the brush pattern is shaded based on the shade information extracted by the shade information extracting means, using a drawing color designated by the means. Because to function as a drawing means,
The drawing texture of the solid paint can be reproduced by blurring or shading expressing the unevenness of the base, thereby improving the usability or operability of the tablet.

The drawing program according to the present invention (claim 9) is the drawing program according to claim 8, wherein the density information extracting means includes a crayon, a chalk, a pencil,
Since the density information determined based on the blur or shading when drawn on at least one base material of paper, canvas, and panel by at least one solid writing instrument of the conte path is used, the unevenness of the base material is used. It is possible to reproduce a wide variety of drawing textures that are highly correlated with the case of using the actual product by using the shade information that reflects the actual combination of the tablet and the solid paint, thereby improving the usability or operability of the tablet Become.

The drawing program according to the present invention (claim 1)
0) In the drawing program according to claim 8 or 9, the brush pattern to be drawn by the image drawing means according to the pressure when coordinates are input to the coordinate input surface by the coordinate input means. Function as a shade increasing / decreasing means to increase / decrease the shading of the image by a predetermined value. Like drawing with solid paint such as chalk, dense drawing can be reproduced with high pen pressure, and coarse drawing can be reproduced with low pen pressure. Thus, it is possible to improve the usability or operability of the tablet.

The drawing program according to the present invention (claim 1)
1) A program for drawing a brush pattern, which is a basic shape of drawing, according to the locus, using an output signal from a tablet having a coordinate input surface and coordinate input means for inputting coordinates to the coordinate input surface. A computer is provided with a drawing color designating means for designating a drawing color, a coordinate value detecting means for detecting a coordinate value of coordinates inputted by the coordinate inputting means, and a drawing color designated by the drawing color designating means. Using, at a position corresponding to the coordinate value detected by the coordinate value detecting means, an image drawing means for embossing a predetermined shading pattern to draw a brush pattern with brightness unevenness, and the image drawing means The brush pattern to be drawn is made to function as overwriting control means for performing a control of sequentially overwriting in correspondence with the locus on the coordinate input surface of the coordinate input means. , You can reproduce draw texture oil painting by uneven representation by shading profile in the brush pattern, which makes it possible to improve the usability or operability of the tablet.

The drawing program of the present invention (claim 1)
2) The drawing program according to claim 11, wherein
According to the pressure when the coordinate input means is inputting coordinates to the coordinate input surface, the brush pattern is made to function as a brush pattern scaling means for expanding or reducing the brush pattern, so when drawing with a paintbrush with oil paint Similarly, when the pen pressure is high, the brush pattern is deformed so that the drawing area is large, and when the pen pressure is low, the brush pattern is deformed so that the drawing area is small. Can be improved.

The drawing program of the present invention (claim 1)
3) A drawing program for drawing a brush pattern, which is a basic shape of drawing, according to the locus, using an output signal from a tablet having a coordinate input surface and coordinate input means for inputting coordinates to the coordinate input surface. And a computer which draws the brush pattern at a position corresponding to the coordinate value detected by the coordinate value detecting means, and a coordinate value detecting means for detecting a coordinate value of the coordinate input by the coordinate input means. Image drawing means, original image data storage means for storing original image data to be an original image to be superimposed, and whether or not coordinates are continuously inputted by the coordinate input means on the coordinate input surface. Input determination means for determining whether or not coordinates have been continuously input by the input determination means. The superimposition control means for performing control to draw the sipatterns sequentially on the original image and drawing the coordinates is stored by the original image data storage means when the input determination means determines that the input of coordinates is interrupted. Based on the original image data, the original image is made to function as re-polymerization control means for performing control to further superimpose and draw on the image superimposed and drawn by the superimposition control means. The original image is not blurred or buried by the line drawing, so that it is possible to perform drawing without any special consideration in the vicinity of the outline of the original image, and it is possible to perform a drawing operation while confirming a clear original image. It is possible to improve the usability or operability of the tablet.

The drawing program of the present invention (claim 1)
4) The drawing program according to claim 13, wherein
When one end of the coordinate input means inputs coordinates to the coordinate input surface, the coordinate input means draws a line drawing by a brush pattern using an output signal from a tablet formed in a pen shape. Is a drawing program for erasing a drawn line image when inputting coordinates to the coordinate input surface, wherein the computer determines whether or not coordinates have been input to the coordinate input surface by the other end. The other end input determining means for determining whether or not the image of the area corresponding to the coordinate value detected by the coordinate value detecting means when it is determined that the coordinates have been input by the other end input determining means. Based on the image data stored by the original image data storage means, the function as a restoration means for restoring only the original image portion is provided. Senses that the coordinate input means as brush rubbed on the coordinate input surface is inverted, can restore the original image, which makes it possible to improve the usability or operability of the tablet.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of a general configuration of a drawing apparatus according to the present invention.

Fig. 2 Tablet (tablet plate and tablet pen)
FIG. 4 is an explanatory diagram showing an example of the configuration.

FIG. 3 is a diagram showing the appearance calibration of a liquid crystal pen tablet in which a coordinate input surface and a display device are integrally formed.

FIG. 4 is an explanatory diagram showing an example of a hardware configuration of the drawing apparatus of the present invention.

FIG. 5 is an explanatory diagram showing an example of a functional configuration for realizing a solid paint hard-core drawing mode among the functional configurations of the drawing apparatus.

FIG. 6 is a table showing an example of a combination of information on a writing implement and a base material stored in a shading information storage unit.

FIG. 7 is an explanatory diagram showing a crayon density information example (K3).

FIG. 8 is an explanatory diagram showing an example of chalk shading information (C1).

FIG. 9 is an explanatory diagram showing an example of shade information of a pencil (P1).

FIG. 10 is an explanatory diagram showing an example of background information for reproducing wrinkle information.

FIG. 11 is a diagram illustrating a drawing example in a crayon mode.

FIG. 12 is a diagram illustrating a drawing example in a choke mode.

FIG. 13 is a diagram illustrating a drawing example in a pencil mode.

FIG. 14 is an explanatory diagram showing an example of a processing flow of the drawing apparatus according to the first embodiment;

FIG. 15 is an explanatory diagram showing an example of a functional configuration for realizing an oil painting mode, among the functional configurations of the drawing apparatus according to the second embodiment;

FIG. 16 is an explanatory diagram showing a part of a brush pattern in which a predetermined transparency distribution pattern is embossed to give brightness unevenness.

FIG. 17 is an explanatory diagram illustrating a drawing example in the oil painting mode of the drawing apparatus according to the second embodiment;

FIG. 18 is an explanatory diagram illustrating an example of a processing flow of the drawing apparatus according to the second embodiment;

FIG. 19 is an explanatory diagram showing an example of a functional configuration for realizing an erasing mode interlocked with an operation of a tablet, among functional configurations of the drawing apparatus according to the third embodiment;

FIG. 20 is an explanatory diagram for describing control contents when drawing in the crayon mode on the original image.

FIG. 21 is an explanatory diagram showing a drawing result when a coordinate input surface is traced in the eraser mode from the drawing state shown in FIG. 20 (c).

FIG. 22 is an explanatory diagram showing an example of the flow of processing of the drawing apparatus.

FIG. 23 is an explanatory diagram showing an example of the screen configuration of the drawing software of the present invention.

[Explanation of symbols]

100, 200, 300 Drawing device 101 Main unit 102 Tablet Board 103 Tablet Pen 104 Display device 105 keyboard 106 mice 121 coordinate input surface 122 pen stand 131 Pen tip 131 Pen pressure sensor 132 Eraser 133,134 Side switch 150 tablets 404 hard disk 405 graphics card 442 drawing software 443 driver software 501 coordinate input unit 502 Coordinate value detector 503 Shading information storage 504 brush pattern determination unit 505 Shading information extraction unit 506 Drawing color specification section 507 Pressure detector 508 Shading increase / decrease part 509 Image drawing unit 1501 Brush pattern change unit 1502 Image drawing unit 1503 Overwrite control unit 1901 Drawing attribute specification section 1902 Image drawing unit 1903 Input judgment unit 1904 Polymerization control unit 1905 Original image data storage 1906 Repolymerization control unit 1907 Other end input judgment unit 1908 Restoration unit 2301 Pen tab 2302 drawing color selection unit 2303 brush pattern scaling unit 2311 Drawing execution mode selection icon group 2312 Eraser mode icon

   ────────────────────────────────────────────────── ─── Continuation of front page    F term (reference) 5B050 BA06 BA18 DA02 EA09 EA30                       FA02 FA09 FA13                 5B068 AA05 BD17 BE08 BE11 CC13                       CC15

Claims (14)

[Claims] A tablet having a coordinate input surface and coordinate input means for inputting coordinates with respect to the coordinate input surface;
What is claimed is: 1. A drawing apparatus for performing drawing in accordance with a locus of a brush pattern which is a basic shape of drawing, comprising: drawing color designation means for designating a drawing color; and coordinate value detection means for detecting coordinate values of coordinates input by said coordinate input means. Density information extraction means for extracting density information of an area corresponding to the coordinate value detected by the coordinate value detection means, the density information corresponding to the surface irregularities of the material assumed as the background; and Using the drawing color specified by the specifying means,
A drawing unit for drawing an image in which the brush pattern is shaded based on the shade information extracted by the shade information extraction unit. 2. The method according to claim 1, wherein the at least one solid writing implement of a crayon, a chalk, a pencil, and a contepas is applied to at least one of a base material of a paper, a canvas, and a panel. 2. A density information storage means for storing density information, wherein the density information extraction means uses the density information stored by the density information storage means.
3. The drawing apparatus according to claim 1. 3. A pressure detecting means for detecting a pressure when the coordinate input means is inputting coordinates to the coordinate input surface; and 3. The drawing apparatus according to claim 1, further comprising: a density increasing / decreasing unit configured to increase / decrease a density of a brush pattern to be rendered by a predetermined value. 4. A tablet having a coordinate input surface and coordinate input means for inputting coordinates with respect to the coordinate input surface,
What is claimed is: 1. A drawing apparatus for performing drawing in accordance with a locus of a brush pattern which is a basic shape of drawing, comprising: drawing color designation means for designating a drawing color; and coordinate value detection means for detecting coordinate values of coordinates input by said coordinate input means. Using the drawing color specified by the drawing color specifying means,
Image drawing means for embossing a predetermined shading pattern and drawing a brush pattern with brightness unevenness at a position corresponding to the coordinate value detected by the coordinate value detecting means; and drawing by the image drawing means. An overwriting control unit for performing a control of sequentially overwriting a brush pattern in correspondence with a locus on the coordinate input surface of the coordinate input unit. 5. A pressure detecting means for detecting a pressure when the coordinate input means is inputting coordinates to the coordinate input surface; and a size of the brush pattern according to the pressure detected by the pressure detecting means. The drawing apparatus according to claim 4, further comprising: a brush pattern changing unit that changes a shape or a shape. 6. A tablet having a coordinate input surface and coordinate input means for inputting coordinates on the coordinate input surface,
A drawing device for performing drawing according to a locus of a brush pattern that is a basic shape of drawing, wherein the coordinate value detecting unit detects a coordinate value of coordinates input by the coordinate input unit, and the coordinate value is detected by the coordinate value detecting unit. Image drawing means for drawing the brush pattern at a position corresponding to a coordinate value; original image data storage means for storing original image data to be an original image for superposition; and the coordinate input means for the coordinate input surface Input determination means for determining whether coordinates are continuously input or the input of coordinates is interrupted, and a brush pattern drawn by the drawing means when the input determination means determines that coordinates are continuously input. And superimposition control means for performing control to draw sequentially superimposed on the original image, and that input of coordinates is interrupted by the input determination means When the setting is made, the control is performed to further superimpose and draw the original image on the image which is superimposed and drawn by the superimposing control unit, based on the original image data stored by the original image data storage unit. And a re-polymerization control means for performing the following. 7. The coordinate input means is formed in a pen shape, and one end of the coordinate input means draws a line drawing by a brush pattern when inputting coordinates on the coordinate input surface, and the other end of the coordinate input means. Is a drawing device for erasing a drawn line image when inputting coordinates to the coordinate input surface, wherein the other end determines whether or not coordinates are input to the coordinate input surface by the other end. Input determining means, and when the other-end input determining means determines that coordinates have been input, stores an image of an area corresponding to the coordinate value detected by the coordinate value detecting means in the original image data storage. 7. The rendering apparatus according to claim 6, further comprising: a restoration unit that restores an image of only the original image portion based on the image data stored by the unit. 8. A program for drawing a brush pattern, which is a basic shape of drawing, according to the locus, using an output signal from a tablet having a coordinate input surface and coordinate input means for inputting coordinates to the coordinate input surface. A computer, comprising: a drawing color specifying unit that specifies a drawing color; a coordinate value detecting unit that detects a coordinate value of coordinates input by the coordinate input unit; and a coordinate value detected by the coordinate value detecting unit. Using density information extracting means for extracting density information corresponding to the surface irregularities of the material assumed as the base, which is the density information of the area corresponding to, using a drawing color specified by the drawing color specifying means,
A drawing program for functioning as an image drawing means for drawing an image in which the brush pattern is shaded based on the shade information extracted by the shade information extraction means. 9. The method according to claim 9, wherein the density information extracting means includes a crayon,
The use of shading information determined based on shading or shading when drawn on at least one base material of paper, canvas, panel with at least one solid writing implement of chalk, pencil, contepath. 9. The drawing program according to claim 8, wherein: 10. According to the pressure when coordinates are input to the coordinate input surface by the coordinate input means,
10. The non-transitory computer-readable storage medium according to claim 8, wherein the non-transitory computer-readable storage medium stores the non-transitory computer-readable recording medium according to claim 8, wherein the non-transitory computer-readable recording medium stores the non-transitory computer-readable recording medium. 11. A program for drawing a brush pattern, which is a basic shape of drawing, according to a locus thereof, using an output signal from a tablet having a coordinate input surface and coordinate input means for inputting coordinates to the coordinate input surface. A computer, comprising: a drawing color specifying unit that specifies a drawing color; a coordinate value detecting unit that detects a coordinate value of coordinates input by the coordinate input unit; and a drawing color specified by the drawing color specifying unit. Using,
Image drawing means for embossing a predetermined shading pattern and drawing a brush pattern with brightness unevenness at a position corresponding to the coordinate value detected by the coordinate value detecting means; and drawing by the image drawing means. A drawing program for causing a brush pattern to function as overwriting control means for performing a control of sequentially overwriting in correspondence with a locus on the coordinate input surface of the coordinate input means. 12. A brush pattern changing means for changing the size or shape of the brush pattern according to the pressure when the coordinate input means inputs coordinates to the coordinate input surface. Claim 1
2. The drawing program according to 1. 13. A drawing for drawing a brush pattern, which is a basic shape of drawing, according to a locus thereof, using an output signal from a tablet having a coordinate input surface and coordinate input means for inputting coordinates to the coordinate input surface. A program, comprising: a computer, a coordinate value detecting means for detecting a coordinate value of the coordinates input by the coordinate input means, and the brush pattern at a position corresponding to the coordinate value detected by the coordinate value detecting means. Image drawing means for drawing, original image data storage means for storing original image data serving as an original image for superimposition, and input of coordinates by the coordinate input means on the coordinate input surface. Input determination means for determining whether or not the input has been interrupted; and if the input determination means determines that the coordinates have been continuously input, the drawing is performed by the drawing means. Superimposition control means for performing control to draw a brush pattern to be drawn by superimposing the brush pattern on the original image sequentially, and when the input determination means determines that the input of coordinates has been interrupted, the original image data storage means Based on the original image data stored by the superimposing control unit, the original image is further functioned as re-polymerization control means for performing control of superimposing and drawing on the image drawn by superimposing. And a drawing program. 14. When one end of the coordinate input means inputs coordinates to the coordinate input surface, an output signal from a tablet in which the coordinate input means is formed in a pen shape is used to draw a line drawing by a brush pattern. A drawing program for erasing a drawn line image when the other end of the coordinate input means inputs coordinates to the coordinate input surface; The other end input determining means for determining whether or not the coordinates have been input; and when the other end input determining means determines that the coordinates have been input, the other end input determining means corresponds to the coordinate value detected by the coordinate value detecting means. A function of restoring the image of the region that has been restored to an image of only the original image portion based on the image data stored by the original image data storage means. Item 14. The drawing program according to Item 13.