JPS63106790A - Character display system for image display device - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Summary] The present invention is a character display method for an image display device in which the size of displayed characters in the image display device can be adjusted. The present invention improves the operability of the image display device by generating a character shape pattern whose dimensions have been converted and allowing the operator to determine the character size while comparing it with the image size.

[Industrial application field]

The present invention relates to a character display method for an image display device that allows adjustment of display character size in the image display device.

When displaying an image and characters simultaneously on an image display device, the image is first displayed, and the operator specifies an insertion location in the image, and inserts the desired character, for example, using a kana-kanji conversion input method.

However, since the characters to be displayed are character patterns with dimensions stored in advance in the image display device, the operator can enlarge the character dimensions to emphasize the character expression, or increase the number of characters to be displayed. The operator did not have the freedom to decide on the character size, such as reducing the size of the text.

Therefore, the operator was unable to insert characters of appropriate dimensions to the image.

[Conventional technology]

FIG. 2 is a diagram illustrating the configuration of a conventional image display system.

When displaying characters on the image display device, the host computer 1 reads out the character pattern 5 stored in the auxiliary storage device 2 into the image memory 6 of the image control device 3, and the image display control section 7 reads out the character pattern 5 into the image memory 6. The character pattern is inserted into the designated position of the image stored in the image memory 6.

The data generated in the image memory 6 is displayed on the image display device 4.

[Problem that the invention seeks to solve]

In this conventional method, as mentioned above, the character pattern of the characters to be displayed is stored in the auxiliary storage device, and the host computer reads out the character pattern and inserts it into the image using the image control device to display it on the screen of the image display device. is displayed.

However, assuming that one character pattern stored in the auxiliary storage device is composed of, for example, 24×24 dots, a storage capacity of 24×24 (=576) bits is required.

Therefore, if, for example, 5,000 characters were to be displayed using this number of dots, approximately 2.8 megabits of storage capacity would be required, but it would be possible to display various glyph patterns by changing the character size for one character. Then, a storage capacity that is multiple times the number of glyphs as this storage capacity is required.

However, since the number of displayed characters and the number of glyphs are directly related to the display performance of an image display system, there is an extremely strong demand for an increase in these numbers.

In order to meet this demand, it is necessary to increase the storage capacity, and the larger the capacity, the longer the access time.

The present invention was created in view of these points, and an object of the present invention is to provide an image display device that freely generates a character pattern in a character shape specified by an operator using a coordinate conversion section.

[Means for solving problems]

In order to achieve the above purpose, a coordinate conversion means is provided,
The character pattern read out from the character pattern storage section of the image memory into the image calculation work area is converted by coordinate conversion means.
The coordinates of the dots that make up the character pattern are converted to generate the character pattern specified by the input.

[Effect]

In this manner, since characters having the specified dimensions can be generated by the coordinate conversion means, one type of standard character pattern is stored as a character pattern to be displayed.

Therefore, the storage capacity is small, the operator can display characters of the specified size, and an image display system with extremely good operability can be constructed.

Therefore, the image display system can be configured as a miniaturized image display device.

〔Example〕

FIG. 1 shows a block diagram of an embodiment of a character display method of an image display device according to the present invention.

Note that the same reference numerals indicate the same objects throughout the figures.

FIG. 1 shows an image display device having a functional configuration equivalent to the image display system shown in FIG. 2. In FIG.

Therefore, the control section 12 in FIG. 1 has the functions of the host computer 1 and the image control device 3, and the display memory 21, LUT (verification table) 22, and display section 23 have the functions of the image display device 4 in FIG. have

In the image display device shown in FIG. 1, image data is input from, for example, a scanner 18, and the original image is scanned to become data for each pixel of the original image, and the data is stored in the image memory via the input interface 15 according to instructions from the control unit 13. 12 image data storage units 123.

The image data stored in the image storage unit 123 is developed into a bit pattern in the RGB memory 211 of the display memory 21 via the display interface 20, the color density of the pixel is checked in the LUT 22, and the image data is displayed on the CRT display of the display unit 23. The image is displayed.

To insert characters into this displayed image, the operator operates the keyboard 17 and inputs the characters into the input interface 14.
``Kana'' input via the controller 13 is converted into kanji by the control unit 13, and a character pattern stored in the character pattern storage unit 122 is extracted.

The character pattern and the designated location of the image inputted by the operator from the keyboard 17 are bit-developed in the overlay plane memory 212 of the display memory 21, combined with the image pattern stored in the RGB memory 211, and displayed on the display unit 23. Is displayed.

When the operator compares the image and the characters on the displayed screen and determines that they are unsuitable, the operator operates the keyboard 17 to designate the size of the characters (designates at the same time when inputting characters).

The control unit 13 stores the character pattern whose dimensions need to be changed in the image calculation work area 121, operates the coordinate conversion means to convert the dimensions of the character pattern, writes it into the overlay plane memory 212, and displays it.

An example of the coordinate conversion means 11 will be shown below.

From the character pattern storage section 122 to the image calculation area 121
If the address of the dot of the character pattern stored in is represented by the coordinates (x, y) on the memory, and the coordinates after being enlarged/reduced are (X, Y), then the following equation is converted by the coordinate conversion means. It will be done.

x=aX+bY+c y = d It will be done.

The dots whose addresses have been calculated are sequentially stored in the overlay plane memory 212.

Note that the character pattern is not only enlarged/reduced by the above conversion formula, but also subjected to character shape conversion such as rotation and italic transformation.With this function, display characters can be displayed more effectively.

If a hard copy of the display screen is required, the display memory 21 is sent to the printer 19 connected to the control unit 13 via the output interface 16 according to the operator's instructions.
The image data of the content is outputted and printed by the printer 19.

〔Effect of the invention〕

As described above, according to the present invention, an operator can easily display characters suitable for an image on an image display device, and an image display device with good operability can be provided, which is extremely useful in practice. It is.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of a character display method of an image display device according to the present invention, and FIG. 2 is a diagram illustrating a conventional configuration. In the figure, 11 is a coordinate conversion means, 12 is an image memory, 121 is a work area for image calculation,

Claims (1)

[Claims] An image display device capable of displaying images and characters at the same time, comprising a coordinate conversion means (11), which converts a character pattern storage section (122) of an image memory (12) into an image calculation work area (
121), the coordinates of the dots constituting the character pattern are converted to the coordinate conversion means (121).
1) A character display method for an image display device is characterized in that a character shape pattern specified by input is generated by converting the character shape pattern according to 1).