JPH04105005A - Image display device - Google Patents

Abstract

PURPOSE:To precisely measure the distance between arbitrarily selected two points by furnishing a scale width control means, which makes display with a certain value added always, at each side of the scale width as determined on the basis of the location information. CONSTITUTION:When arbitrary two points A, B on the surface of a touch panel 1 are touched, the X, Y coordinate data at this time is emitted to a CPU 3 through a controller 2. The CPU 3 analyzes the input X, Y coordinate data of the points A, B on the basis of a program stored in advance, and the pattern of scale M tying the point A to B is given on a display 5 through a display memory 4. If thereafter the touch surface is moved, the X, Y coordinate data of the points A, B being touched is fed to the CPU 3 from time to time and undergoes analysis to lead to a judgement as the extension of the two ends A, B of the scale M initially displayed, and the scale M is displayed while following up the movement of the touch surface.

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention (Field of Industrial Application) The present invention relates to an image display device that specifies two arbitrary points on a display image and measures the distance between these two points.

(Prior art) Medical images (simply referred to as images) taken by various medical devices such as an X-ray CT device, an ultrasound diagnostic device, and an MRI device are displayed on a display, and the displayed images are observed and used for diagnosis. An image display device is known. When performing diagnosis using such an image display device, depending on the part to be diagnosed, it may be desirable to measure the distance between two specific points and obtain diagnostic information as shown in FIG. 15.

Conventionally, in such cases, an operator manually measures the distance between two specific points on the display using a scale.

Alternatively, specify two arbitrary points on the image displayed on the display using a coordinate input device such as a keyboard, mouse, or trackball, and automatically measure the distance using a calculation device based on the coordinate information of these two points. things are being done.

(Problems to be Solved by the Invention) Conventional image display devices have a similar problem when measuring the distance between two specific points.

First, in the method of manually measuring using a scale, the operator's hands are tied up, which limits the work. Further, in the method of automatically measuring using a calculation device, there is a problem that the operation of specifying two arbitrary points using a coordinate input device becomes extremely complicated. Furthermore, since the point to be specified is likely to shift, errors are likely to occur in the measured distance.

The present invention has been made in response to the above-mentioned problems.
It is an object of the present invention to provide an image display device that can easily measure accurate distances.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, the present invention provides an image display device that specifies two arbitrary points on a display image of a display and measures the distance between these two points. means for displaying a scale on the display image of the display; and a scale display for arbitrarily changing the direction and length of the scale by giving different positional information to two distant points through direct contact input means. The present invention is characterized by comprising a control means and a scale width control means for always adding a predetermined value to both ends of the scale width determined based on the position information and displaying the result.

(Function) A scale pattern is displayed on the displayed image of the display, and the direction and length of this scale can be determined, for example, by the operator touching two fingers on the Sochi panel that covers the display and performing direct input operation. Change the intensity arbitrarily. Further, in this case, the scale is always displayed with an extra predetermined value added to both sides of the width determined based on the positional information obtained by the touch. This allows you to accurately measure the distance between two arbitrarily specified points without requiring complicated operations, and the scale is always displayed with a wide width to account for the area hidden by your finger. Easy-to-read display can be performed.

(Example) The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the image display device of the present invention, in which a touch panel 1 is arranged so as to cover a display 5 to be described later, and a plurality of well-known pressure sensitive elements, for example, are arranged in the X and Y directions. They are arranged two-dimensionally in a plane, and are arranged equally to the pixel arrangement of the display 5. As a result, when the operator directly touches an arbitrary position, pressure is sensed and the X and Y coordinate data of this position is output. In the case of this embodiment, when the operator specifies a point by touching two arbitrary points separated from each other,
The X and Y coordinates of the point are detected, and a pattern of scale M is displayed on the display 5, which will be described later, to connect these two points, and when these two points are moved, the scale M follows this pattern.
is also configured to be displayed moving. In addition, as will be described later, the width of the scale M is determined based on the position information of the touch surface at two points by the operator, and the width is always displayed with a predetermined extra value added to both sides of the width. be done. Thereby, care is taken to prevent both sides of the scale M from becoming difficult to read because they are hidden by the operator's fingers.

A controller 2 detects the X and Y coordinate positions of two points on the display screen when the operator moves the touch surface of the touch panel 1, and outputs the detected positions to the CPU (Central Processing Unit).

A CPU 3 is in charge of the overall control operation, and in particular, in this embodiment, when X and Y coordinate data of two points on the touch surface of the touch panel 1 are input from the controller 2, necessary control operations are performed. A program is stored in the CPU 3 in advance, and when it recognizes that the X and Y coordinate data values of two points indicate different positions, it determines this as a measurement command and displays the first one on the display image. Control is performed so that a pattern of scale M as shown in FIG. 2 is displayed. Also CPU3
When the operator touches any two points on the touch panel 1 with his/her finger, a scale M of a rectangle connecting these two points is displayed based on the X and Y coordinate data of these two points, and both sides of this scale M are displayed. Control is performed so that a predetermined value is always added to the width of the scale M to display it as a wide width W. The added value is configured to be varied by reflecting the touch area of a finger touching the touch panel 1.

For example, if the touch area is a dog, the value will be larger.
Further, when the touch area is small, the value is controlled to be small.

Furthermore, as will be described later, when two arbitrary points move as the operator moves the touch surface, the CPU 3
By inputting the X and Y coordinate data of the point, the scale M is controlled to be moved or extended in the rotational direction, horizontal direction, or length direction on the displayed image. CPU3 is scale M
When displaying on the screen, display the scale in actual size. This makes it possible to measure the distance between any two points by reading both ends of the scale M. In this case, the interval between the graduations of the scale M is calculated from the reduction ratio data for the actual size of the image (which shall be held as additional information for each image), and the method of displaying the actual length on the image, ■ The display There is a method of calculating from the size of 1 pixel on the screen of No. 5 and displaying the length on the display screen.

4 is display memory from controller 2 to CPU 3
This is a memory for writing X and Y coordinate data.

5 is a display consisting of a CRT or the like, which displays a scale M superimposed on the image to be diagnosed under the control of the CPU 3;
It is configured to be able to measure the distance between any two points on the diagnosis target site. 6 is a data bus line for exchanging various signals.

Next, the measurement principle of the present invention will be explained.

As shown in FIG. 3(a), X and Y of the touch panel 1
The pixel arrangement in the direction and the pixel arrangement in the X and y directions of the display 5 as shown in FIG. 3(b) match (completely overlap). do.

Suppose that the operator touches two arbitrary points A and B on the touch panel 1 with his/her finger, then at point A, a group consisting of m
At point B, n pixels of group 2 are pressure sensitive. At this time, m and n coordinates X,
Each Y is expressed as follows.

Group of Groups ■ First, the coordinates of the centers of the groups ■ and ■ are determined as follows.

The center of the group The center of the group Coordinates of any pixel on the touch panel 1 (Xk.

Yf and the coordinates of the corresponding pixel on the display 5 (Xh
+'lp), so by performing the input operation of touching the two points A and B on the touch panel 1 as described above, the display 5 shown in Fig. 4 is displayed under the control of the CPU 3. Scale M as shown in is displayed (output)
will be done.

However, in this case, as shown in FIG. 5, both ends of the scale M are hidden by the fingers, resulting in a display that is difficult to see. Therefore, in order to make the display easy to see, control is performed so that desired values are added to both sides of the width of the scale M, as shown in FIG. This control is performed as follows.

Next, find the long axis of groups ■ and ■ from each center in terms of the number of pixels. Each of these can be obtained as follows.

Long diameter of group 2 Long diameter of group 2 Based on this, assuming that the value of the larger pixel in each group is P pixel, the values to be added to both sides of scale M are determined using this P as a reference. For example, set twice P to 2P
Let be the width of scale M.

FIG. 6 shows an example of how the scale M is displayed on the display 5 using the pixel value 2P as the scale width. The coordinates of the four corners of the scale M in this case are shown as shown in the figure.

As a result, the scale M is displayed with a wider width than the part touched by the operator's finger, and the scale is displayed taking into account the part hidden by the finger, so that an easy-to-read display can be performed.

Next, the operation of this embodiment will be explained.

When the operator touches any two points on the surface of the touch panel 1 while the image of the region to be diagnosed is displayed on the screen of the display 5 in advance as shown in FIG.
, Y coordinate data is output to the CPU 3 via the controller 2. Assuming that two arbitrary points are A and B, these X and Y coordinate data are processed by the CPU as explained in the above principle.
3 is output.

First, the X and Y coordinate data of one point, for example A, are input to the CPU 3, and then the X and Y coordinate data of B are input. The CPU 3 analyzes the separately input X and Y coordinate data of A and B based on a pre-stored program, and if it recognizes that each data indicates a different position, it determines that it is a measurement command. Then, the pattern of the scale M connecting the two points A and B is controlled to be displayed as shown in FIG. This FIG. 8 corresponds to FIG. 2.

Next, when the operator moves the touch surface, the X and Y coordinate data of the two touched points A and B are sequentially input to the CPU 3, and the CPU 3
The coordinate data is analyzed and it is determined that the scale M is an extension of both ends A and B of the initially displayed scale M, and the scale M is controlled to be displayed following the movement of the touch surface. 8th
FIG. 9 is based on the position where the scale M is first displayed as shown in the figure.

11 and 13 show the scale M changed in the rotation direction, horizontal direction, and length direction, respectively.

When displaying scale M in this way, 2 of A and B
The X and Y coordinate data of the points are stored in the display memory 4 each time, and the display on the scale M is controlled to be rewritten every moment as A and B move. The operating method for moving in each direction will be explained below.

1. How to move the scale M in the rotational direction If you move the touch surface to rotate the scale M clockwise with B as the fulcrum, for example, of both ends of the scale M displayed as shown in Figure 8, this movement will occur. The X and Y coordinate data of A5 associated with this are sequentially output to the CPU 3 via the controller 2.

The CPU 3 analyzes this X, Y coordinate data, recognizes it as the movement of the original A stored in advance, and moves the X, Y coordinate data.
The coordinate data is sequentially stored in the display memory 4. Follow the movement of A and display 5 as shown in Figure 9.
control so that scale M is displayed. When the movement of the touch surface stops, the display of scale M also stops, so A
.

By reading the scales at both ends of B, the distance between two points can be measured.

In this case, the width of the scale M displayed as shown in Fig. 9 is
As described above, according to the principle of the present invention, a predetermined value is always added to both sides under the control of the CPU 3, as shown in FIG.

This width W is located outside the touch surface of the finger, so that the end of the scale M can be easily seen from outside the finger. .

The scale M can be rotated counterclockwise. In this case, when the touch surface is moved so as to rotate B counterclockwise using the other end A of the scale M as a fulcrum, the X of B accompanying this movement.

Since the Y coordinate data is sequentially output to the CPU 3 via the controller 2, the moving state of the scale M is displayed on the screen as shown in FIG.

2. How to move scale M in the horizontal direction If you move the scale M displayed as shown in Figure 8 on the touch surface in parallel to the upper left direction, the A,
The X and Y coordinate data of B are sequentially output to the CPU 3 via the controller 2. CPU3 is this X as above.

The original A, which is stored in advance by analyzing the Y coordinate data,
Recognizing that it is a movement of B, the X and Y coordinate data are sequentially stored in the display memory 4. And A, H
The scale M is controlled to be displayed on the display 5 as shown in FIG. 11 by following the movement of the scale M.

Conversely, when moving scale M parallel to the upper right direction,
After rotating the scale M clockwise from the position shown in Fig. 8 in the operating direction described in 1 above, if you move the touch surface parallel to the upper right direction, the 12th scale will follow the movements of A and B. The scale M will be displayed on the display 5 as shown in the figure.

3. How to extend the scale M in the length direction Of both ends of the scale M displayed as shown in Figure 8, for example, with the other end B fixed, move one end A in the lower left direction on the touch surface. The X and Y coordinate data of A accompanying this movement is sequentially output to the CPU 3 via the controller 2.

The CPU 3 analyzes this X, Y coordinate data in the same way as above, recognizes it as the movement of the original A stored in advance, and
The X and Y coordinate data are sequentially stored in the display memory 4. Then, following the movement of A, the display 5 is controlled to extend and display the scale M toward the lower left as shown in FIG.

To extend the scale M in the lower right direction, first rotate the scale M clockwise from the position shown in Figure 8 using the operating method described in 1 above, and then move the touch surface in the upper right direction. This A.

Following the movement of scale B, scale M is displayed on display 5 as shown in FIG.

As described above, according to this embodiment, the scale pattern is displayed on the display screen by the operator touching the touch panel surface and performing an input operation, and the scale pattern is displayed on the display screen according to the method of 1, 2.3 or 2. By moving or extending the scale using a combination of these, both ends of the scale can be specified as two points to be measured. Therefore, by reading the graduations of this scale, the distance between two points can be measured accurately and easily.

In particular, according to this embodiment, the scale M displayed superimposed on the display image is always displayed with a predetermined value added to both sides of the length 1, which is always determined based on the position information of the touch surface. Therefore, the end of the scale M will not be hidden by the finger, and the scale can be read accurately.

[Effects of the Invention] As described above, according to the present invention, when a scale is displayed on the screen by touching the touch panel and performing an input operation, and the scale is changed to an arbitrary position and read, the scale is always displayed. Since both sides of the touch surface are located outside the touch surface, the distance between any two points can be easily and accurately measured in an easy-to-see state.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the image display device of the present invention, FIG. 2 is an explanatory diagram of a display example based on the principle of the present invention, and FIGS. 3(a), (b) to 6 are Detailed explanatory diagrams of the present invention, FIGS. 7 to 10 are explanatory diagrams of a first operating method according to an embodiment of the present invention, and FIGS. 11 and 12 are explanatory diagrams of a second operating method according to an embodiment of the present invention. 13 and 14 are explanatory diagrams of the third operating method according to the embodiment of the present invention, and FIG. 15 is an explanatory diagram of the conventional example. 1...Touch panel, 3...CPU (Central Processing Unit), 5...Display, M...Scale, W...Scale width. M7 Ghoul A Figure Figure

Claims (1)

[Claims] Identify any two points on the display image and select these two points.
In an image display device for measuring the distance between points, there is a means for displaying a scale on the display image of the display, and a means for giving different positional information to two distant points through a direct contact input means, and the direction of the scale. and a scale display control means for arbitrarily changing the length, and a scale width control means for always adding a predetermined value to both sides of the width of the scale determined based on the position information and displaying the scale. image display device.