JPS6223332B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image processing apparatus including a tablet and a display, and particularly to a marker display control method.

The graphic creation and processing system that works with the computer is a CRT display 1 as shown in Figure 1.
0, keyboard 12, tablet (coordinate input device) 14, and display controller 16
An external control device (usually a host computer CPU) 20 is connected via a transmission line 18 to
connected to and configured. To give an example of processing procedures 1 and 2, the controller 16 controls the display 10 by a control command from the CPU 20.
An image such as 22 in FIG. 2 is displayed on the screen of the screen.
When the CRT 10 is set to a certain mode (local display on), a marker M appears on the screen.
The marker M indicates the position of the pen 24, and the first position that appears is the last position that the marker appeared during the previous display. When the pen 24 is placed on the tablet, the marker M moves to a position on the CRT screen corresponding to the position on the tablet (following). There are ultrasonic type, electromagnetic type, etc. as the tablet 14, but in any case, the pen 24 is connected to the tablet 14.
X, Y coordinate signals indicating the pen position are output only when the pen is brought close to or in contact with the surface of the tablet so that the presence of the pen can be detected. Not done. Presence is the state in which the tablet can capture the presence of a pen and output coordinate signals (the output destination is the controller 16).
Out of presence refers to the state of not capturing and therefore not outputting coordinate signals.
That's what it means. When the pen moves in the presence state, the marker M follows it and moves on the screen, and in the out-of-presence state it remains at the last position in the presence state.

A switch 24a is attached to the pen 24,
When the operator presses the pen 24 against the tablet 14, the switch is turned on, and at this time the X and Y coordinate values of the pen position on the tablet are sent to the CPU 20. So, for example, put the CPU 20 in line segment erasing mode and move the pen on the tablet.
Marker M is placed on line segments a and d of the figure as shown in Figure 2.
When you hold it up and press the pen, the coordinates of the pen position are sent to the CPU 20, and the CPU 20 recognizes that the line segments to which these coordinates belong or are close to these coordinates are a and d (therefore, the pen does not mark the marker). It is not necessary to make sure that M is on straight lines a and d,
The line segments a and d can be erased from its own memory, and the erase data is sent to the controller 16 to perform the same erase from the screen memory in the controller. Therefore, the figure 22 on the surface of the CRT tube is not a rhombus as shown, but a diagonal U-shape with sides a and d missing. Although not shown, the CPU 20 is set to line segment writing mode, and the pen is moved to mark the marker M.
Bring the marker to the first desired point on the screen, press the pen there, and then move the pen again to mark the marker M.
When you bring the cursor to a second desired point on the screen and press the pen there, the CPU 20 receives the coordinates of these points, creates a line segment (vector) connecting the points, and writes it into its own memory. At the same time, the controller 16 sends write data to the controller 16 to perform similar writing to the screen memory, and to display the line segment on the CRT display 10.

In this way, with this image processing device, the operator can
Looking at the screen of Display 10, Tablet 14
By operating the pen 24 on the screen, it is possible to interactively perform corrections and creation such as removing and adding line segments on the screen, but conventional devices have the following problems. That is, the marker M can be displayed on the display only when the local display is on (such a mode is provided in the controller 16), and the marker does not appear on the screen when the local display is off. In order to simplify the hardware and software, other functions, specifically line segment creation, etc. can be performed while the local display is on.
It also has a display function. This function is hosted
Although instructions can be given from the CPU 20, the display controller 16 is also provided as a local function. In this way, the pen 24 can be connected to the tablet 14 while the local display is on.
By simply running the button above and pressing the button as appropriate, you can draw a figure on the screen connecting the pressed points with straight lines, which is useful for making prototypes of figures. However, with this method, when erasing is performed, extra line segments are drawn locally, resulting in mismatch between the contents of the memory of the host 20 and the memory of the local 16. That is, to erase, put the host CPU 20 in the erase mode, turn on the local display because it is easier to operate the marker if it is visible, and in this state select the line segments c and d that you want to erase as shown in Figure 3a. Bring marker M above and press down the pen, then place marker M on line segments b and c.
When you press the pen (of course, the order can be reversed), the coordinate values of these two points are sent to the host. The host recognizes line segments based on these coordinate values, and identifies line segments c, d and b, c as shown in figure b.
However, on the local (terminal) side, line segments e and f are created at this time, so they are displayed. Of course, the contents of the memory of the host CPU 20 are only the line segments ab and ad, and there is no ef. However, in the memory of the local controller 16, the line segment
In addition to ab and ad, there is ef, and both are inconsistent. In order to prevent such unexpected line drawings, it is possible to press the pen only once, temporarily end tablet operation, and then resume use, but this is a cumbersome operation. Further, if the erase operation is performed with the local display off, the above-mentioned line drawing will not be performed, but since the marker is not displayed on the display, it is difficult to select the line segment that needs to be erased.

The present invention aims to improve these points, and is characterized by being connected to an external control device 20, comprising a display 10 and a coordinate input device 14, and displaying markers on the display screen. In an image processing device that has a mode that has a function to create and display line segments and a function that transfers the coordinate data of the pressed point to an external control device when a pen is pressed on the coordinate input device, it is possible to create and display lines by just displaying markers. A second mode is provided that does not have a minute creation display function, and when erasing a line segment, select the second mode, specify the line segment to be erased with the marker on the display screen, and use the pen on the coordinate input device. When pressed, coordinate data specifying the line segment can be sent to an external control device. This will be explained in detail below with reference to the drawings.

In detail, there are four modes for inputting coordinate data to the host CPU 20: single point/pen, single point/presence, multipoint/pen, and multipoint/presence. Here, single point means that one coordinate data is sent for one control command (abbreviated as CC), and multi-point means that one coordinate data is sent for one control command (abbreviated as CC).
This means that a large amount of coordinate data can be sent for 1 CC. Therefore, the multi-point mode is convenient for tracing a line segment and picking up the coordinate data of each point on the line segment. Furthermore, "pen" refers to a mode in which coordinate data is sent when the pen is in the presence area and is pressed, and "presence" refers to a mode in which coordinate data is sent just by being in the presence area without having to press the pen.

Figure 4 a and b show examples of single point/pen mode (COMSUP IN and OUT are common. These show the status when sending coordinate data,
COMSUP IN means when the tablet is active and the pen is pressed; COMSUP OUT means when the tablet is active and the pen is in presence). As throughout the diagram, OPSC
indicates out-of-presence, that is, the pen 24 is removed from the tablet 14, and PSC indicates presence, that is, the pen 24 is on the tablet.
PU indicates that the pen 24 is not pressed and the switch 24a is in the off state.
PD refers to the pen down state, that is, the state in which the pen is pressed and the switch is turned on. MKR is a marker,
The single line portion indicates that the marker is displayed on the screen of the CRT 10, and the double line portion indicates that the marker moves in accordance with the movement of the pen (following state). Fourth
As shown in Figure a, in this mode, the control command CC is sent from the host CPU to the controller 16.
When inputting, a marker is displayed, and when the pen 24 comes to a sensing position on the tablet (when it becomes PSC)
Marker M follows. That is, the first marker display position is the previous display position, and when the pen moves in the PSC state, the marker follows it. If you perform pen down PD in this state, coordinate data ADD will be sent and the marker will disappear. When the next CC is input, the marker follows because it is in the PSC state, and ADD is sent out again in PD. The same applies below. Note that GS, SUB,
STATUS is a header sent along with the coordinate data ADD, GS is the first, SUB is the second and subsequent,
STATUS indicates the final coordinate data at the time of leaving the presence area. Figure 4b is the same as Figure 4a, but the pen is moved to the PSC by sending only one coordinate data.
Here is an example of returning the file to OPSC and repeating this process.

For single point/presence, first CC to start tablet operation.
There are two cases: start marker display when receiving and end marker display when GS+ADD is sent, and start marker display when ○RO US+ADD is sent, and end marker display when GS+ADD is sent again or the tablet operation ends. There is one. Figure 4c,
d is single point/presence and
An example of when COMSUP IN is shown. If CC is detected in OPSC, the marker will be displayed, and if it becomes PSC, the marker will follow. If you select PD in this state, GS+ADD will be displayed and the marker will disappear. Then, if the PD state continues as shown in c, SUB + ADD is sent to the host CPU every time CC arrives, and then PU, OPSC,
When CC arrives in such a state, US (header indicating pen-up state) + ADD is sent, and the next C.
STATUS+ADD is sent with C. All of these addresses ADD are pen position coordinate data at the end of the presence PSC. In FIG. 4d, the pen is brought up after the first GS+ADD is sent, and CC arrives in this state. When this CC arrives, the marker is displayed and US+ADD is sent. In this example, CC arrives subsequently, and the marker enters the tracking state. If you pen down in this state, GS+ADD
is sent and the marker disappears. Figure 5a shows the same single point/presence, but
Indicates when COMSUD OUT. In this case, the marker is displayed when the first CC arrives, the marker is followed when the presence is detected, and SUB+ADD is sent. continue
When CC arrives, SUB+ADD is sent each time. Marker tracking stops when the pen is down, and GS+ADD is sent when the pen goes down. In other words
When COMSUP IN, GS+ at first pen down
Coordinate data is not sent until ADD is sent, but with COMSUP OUT, CC can arrive if it is within the presence area even before the first pen down.
SUB+ADD is sent.

Figure 5b is multipoint/pen, Figure 5c,
d indicates the multipoint/presence status.
COMSUP IN, OUT for multipoint/pen
Commonly, the marker is displayed when CC arrives, the PSC follows the marker, and the PD sends GS+ADD, which is the same as the previous example, but in this example, the PU displays the marker, and the PD sends SUB+ADD.
It will be sent out, and every time PD and PU are repeated, it will be sent as many times as possible.
Coordinate data can be input to the CPU 20. When OPSC is used, marker tracking stops,
STATUS + ADD is sent, and if it is set to PSC again, marker tracking is performed, and GS + ADD is sent out with PD. During this time, only one CC has arrived. Figure 5 c is
COMPUP IN, d is for COMPUP OUT. In either case, marker display starts when CC is received or US+ADD is sent, and ends when GS+ADD is sent or tablet operation ends. Since it is in presence mode, pen up,
Coordinate data is sent regardless of whether the pen is down, and since it is a multi-mode, multiple coordinate data can be sent in 1 C.C.

By the way, in order to display the marker on the CRT display 10, in the conventional device, it is necessary to turn on the local display, and when the pen 24 is pressed at two or more places while moving the pen 24 with the local display on, the two or more points are connected with a straight line. A shape is drawn. VTR in Figures 4 and 5
This is the line displayed as a (vector), and in Figure 4 a and c, a figure connecting the three points GS, SUB, and SUB with a straight line appears, and in Figure 5 a, a straight line connecting the two points GS and SUB appears. . The same applies to FIGS. 5b, c, and d.

The present invention aims to prevent such undesired figure addition from occurring on the terminal, and in addition to the conventional marker display plus vector creation display mode, the terminal has a marker display only mode, and vector If you do not wish to display creation, you can now select a mode that only displays markers. Figure 6 shows this as a hardware image.

In Figure 6, 16a is the local display on;
This is a switch that controls turning off the host CPU2.
Switched by a signal from 0. 16b is a marker display and vector creation/display circuit, 16c is a marker display circuit, and 16d is a control circuit. The marker display circuit 16c has the marker display and vector creation/display functions of the vector creation/display circuit 16b removed, and controls the pen coordinate data and pen press signals sent from the tablet 14 to the control circuit 16d.
The marker display and tracking described in detail in FIGS. 4 and 5 are performed. When the local display is turned on, the coordinate data output from the tablet 14 is sent to the CPU 20 and is also input to the circuit 16b through the switch 16a, where a marker is displayed on the CRT display 10 and the aforementioned vector creation and display are performed. When the local display was turned off, the output of the tablet 14 was only sent to the CPU 20 and not input to the control circuit 16d, etc., and no marker was displayed on the CRT display 10 since the conventional device did not have the circuit 16c. In contrast, in the present invention, only the marker display circuit 16c
Since the marker is displayed on the CRT display 10 even when the local display is off, the vector creation display is not performed, so there is no mismatch between the host and local memory contents.
You can easily and reliably input the coordinates of multiple points to the host by operating the pen while looking at the markers on the display.

Note that even in the conventional device, if the tablet coordinate data is sent to the host CPU when the local display is turned off, the contents of the memory in the host and local memory will not be different. However, since the markers are not displayed on the display, data collection becomes difficult.

As explained above, in the present invention, the display of the image processing device has a marker display and tracking only mode, so that the host can watch the marker without any undesired results such as unexpected line drawing.
Coordinate data can be input to the CPU, and the functionality of tablets and image processing devices with displays can be further enhanced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a conventional image processing device, FIG. 2 is an explanatory diagram of pen operation and marker display, FIG. 3 is an explanatory diagram of problems with the conventional device, and FIGS. 4 and 5 are FIG. 6 is an explanatory diagram showing various examples of marker display, and FIG. 6 is an explanatory diagram showing an embodiment of the present invention. In the drawing, 20 is an external control device, 10 is a display, 14 is a tablet, 16 is a display controller, 24 is a pen, and M is a marker.

Claims (1)

[Claims] 1. A mode connected to an external control device 20, equipped with a display 10 and a coordinate input device 14, and having a function of displaying a marker on the display screen and creating and displaying a line segment, and a mode for inputting the coordinates. In an image processing device that has a function of transmitting the coordinate data of the pressed point to an external control device when a pen is pressed on the device, a second image processing device that only displays a marker but does not have a line segment creation display function.
When erasing a line segment, select the second mode, specify the line segment to be erased using the marker on the display screen, and specify the line segment by pressing the pen on the coordinate input device. An image processing device characterized by being capable of sending coordinate data to an external control device.