JPS62236080A - Image processor - Google Patents

Abstract

PURPOSE:To obtain an easy-to-see image figure by using a calculation means which has coordinate data designating the character display position against an original image figure and calculates the coordinate transformation for magnification, contraction, scroll and rotation of the image figure. CONSTITUTION:Character display data 12 written on a character display memory is synthesized with the image display data 11 outputted from an image processing part 2 through a display synthesizing part 5 and displayed at an image display part 6. When an image is rotated, a control part 1 outputs the rotation commands to an image processing part 2 and a character display control part 4. The part 2 applies rotation processing 21 to the data on an image display memory and outputs the data to the part 5. The part 4 calculates the new character display position data X1'Y1' and X2'Y2' after rotation from the rotation command and character position data X1Y1 and X2Y2. The transformation of coordinates is carried out by an arithmetic circuit provided in the part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display function of an image processing device that synthesizes and displays an image screen and a character display.

[Conventional technology]

Conventionally, methods for adding character information to an image screen include a method of writing it into the image information or a method of displaying characters at a fixed location.

[Problem that the invention seeks to solve]

The conventional method of combining characters with images and storing them as image data does not cause much problem when scrolling or enlarging the display, but when displaying a reduced or rotated image, the characters become smaller or the characters are rotated. The disadvantage was that it became difficult to read.

In addition, the method of displaying text in a fixed location can overcome the drawbacks of the above method, but it is not possible to display information closely related to the image, and it is not possible to display text according to the scrolling situation even when scrolling. There wasn't.

[Means for solving problems]

In order to eliminate such drawbacks, the present invention provides an image processing device that has a processing function of enlarging, reducing, scrolling, or rotating an original image, and synthesizes and displays characters on this processed image. A calculation means is provided which has coordinate data specifying a display position and calculates coordinate transformation for enlarging, reducing, scrolling, or rotating the image.

[Effect]

In the present invention, characters are displayed around the converted coordinates, and the characters are not rotated even if the image is rotated.

〔Example〕

An embodiment of an image processing apparatus according to the present invention is shown in FIG. In FIG. 1, 1 is a control unit that controls the entire image processing device; 2 is an image processing unit that has an internal image display memory and performs processing such as enlarging, reducing, scrolling, and rotating data in the memory; 3; 4 is a character display position table, 4 is a character display control section as a calculation means, 5 is a display synthesis section, and 6 is an image display section.

F. When displaying characters on an image, the control section 1 transfers the character display position and the displayed character at that position to the character display control section 4. The character display control section 4 writes the information into the character display position table 3.

An example of the contents of the character display position table 3 is shown in the table.

The character display control unit 4 writes the designated character at the designated position of the character display memory within the character display control unit 4 according to the contents of the character display position table 3. The character display data written in the character display memory (see content 12 of the character display memory in Figure 2) is the image display data output from the image processing section 2 (see content 11 of the image display memory in Figure 2).
are synthesized by the display synthesis section 5 and displayed on the image display section 6. FIG. 2 shows a composite display 13 in the image display section 6.
shows.

Next, the case of enlarging, reducing, scrolling, rotating, etc. an image will be explained. Here, rotation will be explained as an example. When rotating an image, the control section 1 outputs a rotation command to the image processing section 2 and the character display control section 4.

The image processing section 2 performs rotation processing on the data in the image display memory (see contents 21 of the image display memory in FIG. 3), and outputs it to the display synthesis section 5. The character display control unit 4 is
From the rotation command and the character position data (XIYI, X2Y2) of character display position table 3 (see table), new character display position data (X1'Yl',
) is calculated. Coordinate transformation for obtaining new coordinate positions X1'Y1' and X2'Y2' from these XIY1 and X2Y2 is realized by an arithmetic circuit such as a microprocessor in the character display control section 4.

The character display control unit 4 writes the displayed characters in the character display position table 3 into the character display memory based on the obtained new coordinates.

As shown in the content 22 of the character display memory and the composite display 33 in Fig. 3, the text information has its center coordinates transformed according to the rotation of the image (see content 21 of the image display memory in Fig. 3), and It is displayed in the specified position in an easy-to-read format without being rotated. Similarly, when enlarging, reducing, or scrolling, the image is displayed in an easily visible position in easily visible characters.

〔Effect of the invention〕

As explained above, the present invention displays an image by providing a calculation means that has coordinate data specifying the position of character display with respect to the original image and calculates coordinate transformation for enlarging, reducing, scrolling, or rotating the image. At this time, the designated characters can be displayed upright in a designated size at an appropriate position on the image, which has the effect of making it easier for the person viewing the image to recognize information without error.

Furthermore, when used in a system that displays maps to aid the operation of transportation means such as automobiles and airplanes, displaying the direction of travel of the transportation means always upward is a display that is intuitively acceptable to the operator. Therefore, even when the map is rotated and displayed, the characters on the map can always be displayed in the appropriate position and at the appropriate size, making it easy to see the location of the means of transportation you are operating on the map. This has the effect of allowing the operator to check it at a glance.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing an embodiment of an image processing device according to the present invention, FIG. 2 is a display state diagram showing a display state before image rotation, and FIG. 3 is a display state diagram showing a display state after image rotation. It is a diagram. ■...Control unit, 2...Image processing unit, 3...
...Character display position table, 4..Character display control section, 5..Display synthesis section, 6.. Image display section. Patent applicant: NEC Corporation 1 Agent: Kazuko Yamakawa (and 2 others) Figure 1

Claims (1)

[Claims] An image processing device that has a processing function of enlarging, reducing, scrolling, or rotating an original image, and that synthesizes and displays characters on the processed image, and has coordinate data that specifies the position of character display with respect to the original image. An image processing device comprising a calculation means for calculating coordinate transformation of enlargement, reduction, scrolling, or rotation of an image diagram, and displaying characters centered on the transformed coordinates.