JP5108848B2 - Image display device and image display method - Google Patents

Description

  The present invention relates to an image display device and an image display method.

  Conventionally, in an application that displays an image of a map or a product, a mouse drag or a button operation is performed to designate a location in the image or an angle for viewing the image. For example, in the invention of Patent Document 1, a rotation axis is defined in advance, and an image can be rotated by moving a slider.

JP 2001-325608 A

  However, conventionally, the image cannot be moved and rotated at the same time, and in order to view a desired portion at a desired angle, the operation for moving the image and the operation for rotating the image have to be performed separately.

  The present invention has been made in view of the above, and an object thereof is to provide an image display device capable of moving and rotating an image without separately performing an operation of moving the image and an operation of rotating the image, and It is to provide an image display method.

  In order to solve the above-described problem, the image display device of the present invention uses a coordinate acquisition unit that acquires coordinates on the screen at two points designated in the screen on which the image is displayed, and the coordinates. Using the coordinate calculation unit that calculates the coordinates of the two points in the image corresponding to the two points, and the coordinates of the calculated two points, the coordinates of one point in the image existing between the two points are obtained. A coordinate calculation unit for calculating, an angle calculation unit for calculating an angle formed by a straight line passing through the two points in the image and a reference axis of coordinates in the image, using the calculated coordinates of the two points; Using the calculated coordinates of one point, the image is translated so that the one point approaches a predetermined point on the screen, and the calculated angle is used to make the image correspond to the angle. And an image display control unit that rotates the image by a predetermined angle.

  For example, the image display device is used together with an input device that is used to move a pointer displayed on the screen and includes two operation units that are operated when the pointer is displayed on the screen. The coordinate acquisition unit is configured to execute the operation on the coordinates of the first point where the pointer exists and the operation on the second operation unit when the operation on the first operation unit is executed. And obtaining the coordinates of the second point where the pointer exists.

  For example, the image display device is used together with an input device that is used to move a pointer displayed on the screen and includes an operation unit that is operated when the pointer is displayed on the screen. And the coordinate acquisition unit includes the coordinates of the first point where the pointer exists when the operation to the operation unit is started and the pointer where the pointer exists when the operation to the operation unit ends. The coordinates of the second point are acquired.

  The image display method of the present invention includes a step of acquiring coordinates on the screen at two points designated in the screen on which the image is displayed, and 2 in the image corresponding to the two points using the coordinates. Calculating the coordinates of a point, calculating the coordinates of one point in the image existing between the two points using the calculated coordinates of the two points, and calculating the coordinates of the two points And calculating the angle formed by a straight line passing through the two points in the image and a reference axis of coordinates in the image, and using the calculated one point coordinates, the one point is the screen. And parallelly moving the image so as to approach a predetermined point, and using the calculated angle, rotating the image by an angle corresponding to the angle.

  According to the present invention, it is possible to move and rotate an image without separately performing an operation for moving the image and an operation for rotating the image. Therefore, the troublesomeness associated with dividing the operation can be eliminated.

It is a block diagram which shows the structure of the image display apparatus which concerns on this Embodiment. It is a figure which shows the mode before translating and rotating the image displayed on the screen. It is a figure which shows the mode of the calculation for translating and rotating the image displayed on the screen. It is a figure which shows the mode after translating and rotating the image displayed on the screen.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing the configuration of the image display apparatus according to this embodiment.

  The image display device includes an input device 1, a central processing control device 2, and a storage device 3.

  The input device 1 includes an image data acquisition unit 11 that acquires image data from a recording medium (not shown), and a coordinate acquisition unit 12 that acquires coordinates on a screen of a display device (not shown).

  The coordinate acquisition unit 12 is an operation unit such as a mouse, a trackball, or a touch pad (not shown), that is, a button used to move a pointer displayed on the screen and operated when the pointer is displayed on the screen. From an interface unit connected to an input device (such as a mouse) provided with the coordinates of the point where the pointer is located when the operation to the operation unit is executed.

  The coordinate acquisition unit 12 is, for example, the coordinates on the screen of the first point where the pointer exists when an operation (so-called left click) to the first operation unit (for example, the left button of the mouse) is executed, The coordinates on the screen of the second point where the pointer exists when an operation (so-called left click) on the second operation unit (for example, the right button of the mouse) is executed are acquired.

  For example, the coordinate acquisition unit 12 has a pointer when an operation to the operation unit (for example, an operation of continuously pressing the left button of the mouse and releasing the left button when the pointer moves, that is, drag and drop) is started. The coordinates on the screen of the first point and the coordinates on the screen of the second point where the pointer exists when the operation on the operation unit is completed (so-called dropping) are acquired.

  The central processing control device 2 uses these coordinates to calculate the coordinates of the two points in the image corresponding to the two points, and uses the calculated coordinates of the two points to An angle formed by a straight line passing through the two points in the image and a reference axis of the coordinates in the image using the coordinates of the calculated two points and the coordinates of the point in the image The angle calculation unit 23 for calculating the image and the image are displayed on the screen, and the calculated coordinate of one point is used to translate the image so that one point approaches a predetermined point on the screen. An image display control unit 24 that rotates the image by an angle corresponding to the angle is provided using the determined angle.

  The storage device 3 stores acquired coordinates, calculated coordinates and angles, image data, and the like.

  The image display device may be configured as dedicated hardware. Alternatively, a general-purpose computer may function as an image display device. A computer program therefor is stored in a computer-readable recording medium such as a semiconductor memory, a magnetic disk, an optical disk, a magneto-optical disk, or a magnetic tape for display. Etc. and can be distributed. Alternatively, the computer program may be transmitted via a communication network such as the Internet.

(Image display method)
Next, an image display method according to the present embodiment will be described.

  First, the image data acquisition unit 11 acquires image data from the storage device 3 or the like, and gives this to the image display control unit 24. For example, as shown in FIG. 2, the image display control unit 24 displays an image G based on the image data on the screen D.

  The point O previously determined on the screen exists at the center of the screen. The X coordinate on the screen of the point O is Ox, and the Y coordinate is Oy. If the height of the screen is H and the width is W, coordinates Ox = W / 2 and coordinates Oy = H / 2. The origin D0 of the coordinates on the screen is a point at the lower left corner of the screen, and the X axis of the coordinates on the screen extends in the right direction and the Y axis extends in the upward direction. Note that the point O may be a point other than the center of the screen.

  The X coordinate of the point O ′ in the image corresponding to the point O is O′x, and the Y coordinate is O′y. The origin G0 of the coordinates in the image is the point at the lower left corner of the image, and the X axis of the coordinates in the image extends to the right and the Y axis extends upward. The image is inclined counterclockwise by an angle θ with respect to the screen.

  Next, the mouse or the like is operated, and as shown in FIG. 3, the coordinate acquisition unit 12 acquires the coordinates of the first point P1 on the screen and the coordinates of the second point P2 on the screen. Then, these coordinates are given to the coordinate calculation unit 21.

  The coordinate calculation unit 21 calculates the coordinates of the two points P 1 ′ and P 2 ′ in the image corresponding to the two points P 1 and P 2 using the given coordinates, and gives them to the coordinate calculation unit 22 and the angle calculation unit 23. The X coordinate of the point P1 'is P1'x, and the Y coordinate is P1'y. The X coordinate of the point P2 'is P2'x, and the Y coordinate is P2'y.

  The coordinate calculation unit 22 calculates the coordinates of the point T ′ in the image existing between the two points P <b> 1 ′ and P <b> 2 ′ using the given coordinates, and supplies the calculated coordinates to the image display control unit 24.

  Here, the coordinate calculation unit 23 calculates the coordinates of the point T ′ using, for example, Expression (1).

点Ｔ’のＸ座標はＴ’ｘ、Ｙ座標はＴ’ｙである。

The X coordinate of the point T ′ is T′x, and the Y coordinate is T′y.

The angle calculation unit 23 calculates an angle θ ₁₂ formed by the straight line S passing through the two points P1 ′ and P2 ′ in the image and the X axis Gx of the coordinates in the image, using the given coordinates.

Here, the angle calculation unit 23 calculates the angle θ ₁₂ using the formula (2), and gives it to the image display control unit 24.

ただし、ｘは直線Ｓ上に存在するベクトルのＸ軸Ｇｘ方向の成分、ｙは当該ベクトルのＹ軸Ｇｙ（画像における座標のＹ軸）方向の成分である。

However, x is a component in the X-axis Gx direction of a vector existing on the straight line S, and y is a component in the Y-axis Gy (Y-axis of coordinates in the image) direction of the vector.

  For example, the component in the X-axis Gx direction is P2′x−P1′x, and the component in the Y-axis Gy direction is P2′y−P1′y.

Next, the image display control unit 24 translates the image D so that the point T ′ approaches the point O using the coordinates of the given point T ′. The image display control unit 24 uses the angle theta ₁₂ given, the image D, for example, (about the point O) centered on the angle theta ₁₂ only point T 'is rotated counterclockwise.

Thus, as shown in FIG. 4, for example, match the point T 'is the point O, the image G is to screen D, a state inclined by an angle theta + theta ₁₂ counterclockwise.

  Note that the point T ′ may not coincide with the point O. For example, the amount of parallel movement may be determined in advance, and the image may be moved by the amount of movement.

Further, the rotation angle may not be the angle theta _12. For example, the image may be rotated by the obtained angle by multiplying the angle θ12 by a predetermined coefficient.

  As described above, according to the present embodiment, an image can be moved and rotated without separately performing an operation for moving the image and an operation for rotating the image. Therefore, the troublesomeness associated with dividing the operation can be eliminated.

DESCRIPTION OF SYMBOLS 1 Input device 2 Central processing control device 3 Memory | storage device 11 Image data acquisition part 12 Coordinate acquisition part 21, 22 Coordinate calculation part 23 Angle calculation part 24 Image display control part

Claims (5)

A coordinate acquisition unit that acquires the coordinates of the two points specified in the screen on which the image is displayed;
A coordinate calculation unit for calculating coordinates of two points in the image corresponding to the two points using the coordinates;
A coordinate calculator that calculates the coordinates of one point in the image existing between the two points using the coordinates of the calculated two points;
Using the calculated coordinates of the two points, an angle calculating unit that calculates an angle formed by a straight line passing through the two points in the image and a reference axis of the coordinates in the image;
Using the calculated coordinates of one point, the image is translated so that the one point approaches a predetermined point on the screen, and the calculated angle is used to set the image to the angle. An image display apparatus comprising: an image display control unit that rotates by a corresponding angle. The image display device according to claim 1,
The image display device is used together with an input device that is used to move a pointer displayed on the screen and includes two operation units that are operated when the pointer is displayed on the screen. Yes,
The coordinate acquisition unit
The coordinates of the first point where the pointer exists when the operation to the first operation unit is executed and the first point where the pointer exists when the operation to the second operation unit is executed An image display device that acquires coordinates of two points. The image display device according to claim 1,
The image display device is used together with an input device that is used to move a pointer displayed on the screen and includes an operation unit that is operated when the pointer is displayed on the screen.
The coordinate acquisition unit
The coordinates of the first point where the pointer exists when the operation to the operation unit is started and the coordinates of the second point where the pointer exists when the operation to the operation unit ends. An image display device characterized by being obtained. Obtaining the coordinates of the two points designated in the screen on which the image is displayed;
Using the coordinates to calculate the coordinates of the two points in the image corresponding to the two points;
Calculating the coordinates of one point in the image existing between the two points using the coordinates of the calculated two points;
Calculating an angle formed by a straight line passing through the two points in the image and a reference axis of coordinates in the image, using the calculated coordinates of the two points;
Using the calculated coordinates of one point, the image is translated so that the one point approaches a predetermined point on the screen, and the calculated angle is used to set the image to the angle. And a step of rotating the image by a corresponding angle.   A computer program for causing a computer to function as the image display device according to claim 1.

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