JPS63296122A - Picture data input device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] The present invention provides a signal detection body of an image data input device with a pressure detector that detects the contact pressure between the signal detection body and the stage, and uses the pressure detector as image data of an image to be drawn. Output coordinate data and pressure data.

On the other hand, image data consisting of coordinate data and pressure data is input, and pattern data corresponding to the pressure signal is displayed at the coordinate position of the image data display device indicated by the coordinate data.

When used to display handwritten images, the operator can express shading by writing or writing pressure on the image data display device with the sensation of a brush.

[Industrial application field]

The present invention relates to an image data input device that is equipped with a pressure detector that detects the pressure between a signal detection body and a stage and outputs coordinate data and pressure data as image data.

With advances in computer graphics technology, various drawing methods have been developed.

Generate images by drawing on the tablet with a stylus pen,
The handwritten drawing method to be input is a line drawing with a predetermined line width,
The drawing was created by filling in the line drawing area based on the line drawing.

However, there has been a need for an image data input device that can smoothly input and display characters drawn with a brush, and in particular can smoothly input and display characters written with a brush, rather than drawing using line drawings.

[Conventional technology]

FIG. 8 is a diagram illustrating a handwriting input device, in which a tablet is usually used to draw on a flat stage with the tip of a signal detector (stylus pen).

The stand generates X-axis and Y-axis coordinate signals, and the signal detector detects the coordinate signals at the contact point between the tip and the stand.

When drawing is performed with the stylus pen on the drawing stand, the coordinates of the contact points are sequentially output as image data, and based on the image data, the image drawn with the stylus pen is reproduced and displayed on the image data display device.

[Problem that the invention seeks to solve]

In this conventional image data input device, the locus of the coordinates of the contact point where the tip of the signal detection object to be drawn contacts the stage is output as image data.

That is, the image data output by the image data input device is line drawing data, and the image data display device merely reproduces the line drawing data on the display screen.

Therefore, when attempting to display a character written with a brush, its outline is displayed as a line drawing, and its internal area is filled in to represent the thick and thin parts of the character when it is written with a brush.

However, in order to input calligraphy characters as if they were written with a brush, it is necessary to be able to simultaneously display the thickness of the character on the locus of the drawing point that passes through the center of the character.

The present invention was created in view of these points, and it is an object of the present invention to provide an image data input device that can input image data as if it were written by hand, and an image data display device that displays an image using the image data. The purpose is

[Means for solving problems]

In order to achieve the above-mentioned object, the image data input device of the present application is provided with a pressure detector attached to the signal detection body to detect the contact pressure with the stage, and to generate an image using coordinate data and pressure data at the contact point on the screen surface. Construct and output data.

[Effect]

When an operator wishes to express a thick part of a character with a signal detector on the screen surface, the operator applies pressure to the signal detector so that it comes into strong contact with the screen surface.

Also, when writing on thin parts, press the screen surface lightly.

In this way, the coordinates and pressure of a character written by the operator using a brush sense are detected by the coordinate detection section and the pressure signal detection section of the signal detection body, respectively, and are outputted as image data from the image data input device.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the image data input device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of the configuration of an image data input device of the present invention, and FIG. 2 is a diagram explaining the structure of a signal detection body (stylus pen).

As shown in FIG. 1, the image data input device consists of a signal detector, ie, a stylus pen 1, and a display stand, ie, a tablet board 2.

As shown in FIG. 2(a), the stylus pen 1 receives pulse signals indicating the X-axis and Y-axis coordinates generated by the tablet board 2 at regular intervals, and detects the coordinates provided at the pen tip 11 at the tip of the stylus pen 1. Detection is performed using a device 12, for example, a pickup coil.

The pressure applied to the pen tip 11 is detected by a pressure detection unit 14 at the shaft 13.
is transmitted to.

The pressure detector 14 is a pressure detector, such as a ceramic element, and generates a pressure voltage corresponding to the applied pressure.

The pressure voltage detected by the pressure detector 14 is digitized by an analog/digital converter (A/D converter) 15, converted into a pressure signal, and sent to the tablet board 2 together with the coordinate signal detected by the coordinate detector 12. is output to.

Figure 2 (bl represents pressure as displacement of shaft 13, pressure/
This stylus pen uses a differential transformer instead of a force detection element to extract a voltage corresponding to the pressure from the amount of displacement.

Then, the pressure signal of the stylus pen is transmitted to the tablet board 2.
The pressure data is generated as pressure data through the control unit 22 of the controller 22 .

On the other hand, the coordinate signal is output to the tablet board 2, the coordinate detection unit 21 detects a point that matches the coordinate position signals of the X-axis and Y-axis on the tablet board surface, and the control unit 22 creates coordinate data of the coordinate point. .

Note that the clock oscillator 24 generates a clock signal for synchronizing various signals of the tablet board 2.

The image data consisting of this pressure data and coordinate data is
Image data display bag shown in Figure 3! 3 input/output control unit 31
is output to.

Then, the coordinate data detection section 32 of the image data display device 3
The coordinate data of the image data is transmitted to the pressure data detection unit 33.
detect pressure data respectively.

The pressure data detected by the pressure data detection section 33 is sent to the pattern data selection section 34, and the pattern data selection section 34 selects pressure data from the pattern data created in advance in the storage section 36 and stored in the pattern data area 36'. The pattern data corresponding to the pattern data is selected and sent to the drawing section 35.

The drawing section 35 creates image data for image display in the storage section 36 by arranging the pattern data at the coordinate data position sent out by the coordinate data detection section 32.

This image data is sent to the display device 4 via the display control section 37 and displayed on the display screen.

The control section 38 controls each section constituting the image data display device 3.

Below, the drawing displayed by the image data display device will be described in more detail.

As described above, first, N pattern data PTi are prepared in advance.
(i=1 to N) are prepared.

On the other hand, the image data at time t input from the image data input device, that is, the tablet board 2 at fixed time intervals, is
(xt, yt, rt).

Here, (x t, y t) are the coordinates of the stylus pen at time t, and ft is a numerical value indicating the pressure of the stylus pen at time t.

Every time the data pt is input, the pressure ft is classified according to N threshold values, PTi is assigned to each, and (xt) is displayed on the screen of the display device 4.

PTi is drawn at the position corresponding to yt).

The image data input method will be described below. The operator operates the stylus pen 1 on the tablet board like a brush.

That is, as shown in FIG. 5, depending on the strength of the pressure applied to the tip 52 by the shaft 51 of the brush 5, the tip 52 can be moved to A, B, C, or D.
It is assumed that the tip 52 is bent in four stages, and the thickness of the character changes.

FIG. 5 shows the state of contact between the tip 52 and the recording paper surface corresponding to this deflection of the tip 52.

A, where the pressure applied to the tip 52, that is, the pressure of the stylus pen 1 and the tablet board 2, corresponds to the deflection of the tip 52;
When it changes to the four stages of B, C, and D, the tip 52 of Fig. 5
Each pattern data corresponds to the contact area between the dot and the paper surface, and is expressed by the number of dots in a predetermined pattern area, as in patterns A, B, C, and D in FIG.

The writing sensitivity chamber of the stylus pen 1 is obtained by the deflection of the spring 16 shown in FIG.

For example, insert the stylus pen 1 into the
If we move the coordinate points 9B and 2, and calculate the pressure at each coordinate point to C, B, and A, then pattern D corresponds to coordinate point A, and C corresponds to pattern B at the mouth. corresponds to A.

Therefore, the drawn image can display the thickness of the characters as if they were written with a brush, as shown in Fig. 8).

By combining the number of pressure levels of the stylus pen 1, the number of patterns corresponding to each pressure, and the shape of the patterns represented by dots, the feeling of writing with a brush or an image that changes subtly depending on the shape of the tip can be created. It is possible to input data while drawing on the tablet board with a stylus pen 1, and to display the image.

It is also possible to express the shading of coordinate points using pressure signals, for example, the dots of a pattern can be expressed as 16 in hexadecimal representation of O-F.
By displaying the dots in stages, it is possible to create a pattern in which the central part of the pattern is represented by dots with high density, and the surrounding dots are represented by dots with gradually lower density.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to add a pressure signal to the output signal of a stylus pen, draw with the feeling of writing with a brush, input the image data, and express the image of the brush sensitivity chamber. It is extremely useful in practice for use in image processing devices or word processors.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a configuration of an embodiment of an image data input device of the present invention, FIG. 2 is a sectional view showing the configuration of a stylus pen of the present invention, and FIG. 3 is an example of an image data display device used in the present invention. 4 is a diagram explaining the brush sensitivity chamber; FIG. 5 is a diagram explaining the bending of the tip and the state of contact with the paper surface; FIG. 6 is a diagram explaining pattern data; FIG. The figure is a diagram for explaining the stroke trajectory and its image representation, and FIG. 8 is a diagram for explaining the tablet. In the figure, 1 is a stylus pen (signal detector), 2 is a tablet board, 3 is an image data display device, 4 is a display device, 12 is a coordinate detector, and 14 is a pressure detector. Figure 2 talent L4 talent ℃, support Q illusion Vl steal Shu history I'spoon ε north bank to 0
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Claims (1)

[Claims] An image consisting of a stage (2) that generates a coordinate signal and a signal detection body (1) that detects the coordinate signal, and that generates coordinate data of the tip of the signal detection body (1) that comes into contact with the screen surface. The signal detecting body (1) of the data input device is connected to the signal detecting body (1) of the data input device.
A pressure detector (14) is attached to detect the contact pressure between the tip of 1) and the surface of the stage (2), and the image drawn on the stage by the signal detector (1) is converted into coordinate data. An image data input device that converts pressure data into image data and outputs the converted image data.