JP2000287129A - Picture display device, picture display method, and recording medium recorded with picture display control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more compress the quantity of data as compared to that of bit map data even while number of available colors of one font is increased. SOLUTION: A 2nd controller 52 receiving a control command references a font designation table. For example, the 2nd controller 52 references a head address 'bmpchar1' denoted by a font number 1 of an English bmp font, for example, and reads bmp font data denoted by this head address from a flush memory 53. Furthermore, the 2nd controller 52 references a color pallet to set a color of each dot being components of the font. A memory controller 22 expands color data as to each dot set by the 2nd controller 53 on an image memory 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device, an image display method, and a recording medium storing an image display control program suitable for displaying fonts such as characters and icons.

[0002]

2. Description of the Related Art Conventionally, an image display system using an on-screen display (OSD) controller for displaying a menu screen, a title image, and the like has been proposed. In such a system, 1 is used so that it can be easily displayed with a small amount of data.
The colors that can be used for fonts are limited to a few colors.

[0003]

However, if the number of colors that can be used for one font is limited to two or three, there is a problem that the creation of a design is also limited.

On the other hand, if bitmap data is used to use many colors, the amount of data per font becomes enormous. Therefore, for example, if bitmap data is used for a small camera device, a mobile phone, or the like, the memory capacity becomes insufficient or the processing time is increased, which is rather inconvenient.

The present invention has been proposed in view of such circumstances, and it is possible to reduce the amount of data as compared with bitmap data while increasing the number of colors that can be used for one font. It is an object of the present invention to provide a recording medium in which an image display device, an image display method, and an image display control program are recorded.

[0006]

According to the present invention, there is provided an image display apparatus comprising: a color pallet storing means for storing a color pallet comprising a plurality of color designation numbers and corresponding color information; and a font containing no color. Font information storage means for storing first font information to be processed and second font information constituting a font including a color, and a color of the first font and a color of a part other than the first font A color combination information storage unit for storing information of a combination, a selection unit for selecting a first font and its color designation number, or a second font, and a first font and its color designation number set by the selection unit When selected, the first font information is read from the font information storage means, and color information corresponding to the same color designation number as the selected color designation number is stored in the color pattern. When the second font is selected by the selection means, the reading means reads the second font information from the font information storage means, and the information read by the reading means is read from the font information storage means. By providing display means for displaying a font based on the above, the above-described problem is solved.

According to the image display method of the present invention, a color palette including a plurality of color designation numbers and color information corresponding thereto, first font information constituting a font not containing a color, and a font containing a color are provided. The storage means stores the second font information to be composed and the information of the color combination of the color of the first font and the color of the part other than the first font,
When the first font and its color designation number are selected, the first font information is read from the storage means, and the color information corresponding to the same color designation number as the selected color designation number is stored in the storage means. And when the second font is selected, the second font information is read from the storage means, and the font based on the read information is displayed to solve the above-described problem.

A recording medium on which the image display control program according to the present invention is recorded has a color palette including a plurality of color designation numbers and corresponding color information, first font information constituting a font that does not include colors, and A second font information constituting a font including a color, and information of a color combination of a color of the first font and a color of a portion other than the first font in a storage means, When the color designation number is selected, the first font information is read from the storage means, and the color information corresponding to the same color designation number as the selected color designation number is read from the storage means. When the second font is selected, the second font information is read out from the storage means,
The above-mentioned problem is solved by recording an image display control program for displaying a font based on the read information.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

The present invention can be applied to, for example, a camera device 1 having the configuration shown in FIG. The camera device 1 includes:
An imaging unit 10 for imaging a subject; a data processing unit 20 for performing predetermined signal processing on image data; an image memory 30 for expanding and temporarily storing character data including font data and the like; and a liquid crystal display unit (Liquid Crystal Displa)
y: Hereinafter, "LCD". ) 40 and a memory unit 50 including a plurality of memories and controllers.

An imaging unit 10 is a CCD for generating an image signal.
Image sensor 11 and A for digitizing an image signal
A / D converter 12 and a timing generator 13 for controlling drive timing of the CCD image sensor 11 and the A / D converter 12 are provided.

The CCD image sensor 11 generates an image signal in accordance with image pickup light from a subject, and
/ D converter 12. A / D converter 12
Converts the image signal from the CCD image sensor 11 into digital data at a predetermined sampling interval, outputs image data, and supplies the image data to the data processing unit 20.

The data processing unit 20 includes an A / D converter 1
2, a camera processing circuit 21 for performing, for example, white balance adjustment and gamma correction on the image data from the memory 2, a memory controller 22 for writing and reading font data and the like to and from the image memory 30, and a resolution for converting the resolution of the image data A converter 23, a video encoder / decoder 24 for encoding or decoding image data, and an LCD 40
And a D / A converter 25 for output to The data processing unit 20 includes a JPEG circuit 26 for JPEG-compressing image data and a host interface (hereinafter, referred to as a host interface).
It is called “host I / F”. ) 27 and a sync generator 28 for generating a synchronization signal.

The camera processing circuit 21 performs predetermined processing on the image data from the imaging unit 10 and then, for example, causes the resolution converter 23 to perform resolution conversion before supplying it to the video encoder / decoder 24. Memory controller 22
When there is character data in the image memory 30, the character data is read and supplied to the video encoder / decoder 24. The video encoder / decoder 24 encodes the image data and the character data and supplies the encoded data to the LCD 40 via the D / A converter 25. As a result, a character such as a menu is displayed on the LCD 40 together with the subject imaged by the imaging unit 10. Also, the video encoder / decoder 24
Can encode the image data read from the memory unit 50 and expanded by the JPEG circuit 26 and the character data instead of the image data from the imaging unit 10.

The memory unit 50 stores a first controller 51 for generating a predetermined control command, a plurality of tables, and outputs a data corresponding to the control command. OS such as
A flash memory 53 for storing a DC character;
It includes a DRAM 54 for temporarily storing image data and the like, and a recording medium 56 on which image data is recorded or read out via a recording medium interface (hereinafter, referred to as “recording medium I / F”) 55.

The first controller 51 generates a 4-byte control command for one font in response to an operation of an operation unit (not shown). Here, there are an English font and a Japanese font as fonts that can be specified by the control command. For each font, a standard font (hereinafter, “std font”)
That. ) And bitmap fonts (hereinafter referred to as “bmp fonts”).

The std font is a commonly used font and is composed of three colors: a character color (the color of the font itself), a background color, and a border. In addition, the border is
It may or may not be present, and here the color is unified to black. In the bmp font, a color is defined for each pixel constituting the font. That is, bmp
The font is a font that can be freely designed without being limited by the number of colors for each dot.

Therefore, for example, in the case of Japanese, there are a std font and a bmp font for the character "a", and in the case of English, the std font and the bmp font for the character "a". Exists.

The control command is, as shown in FIG.
"Font type" (1 bit), "Language" (1 bit), "Font number" (9 bits), "Color number"
(8 bits). "Font type"
std font or bmp font (0: std, 1:
bmp). “Language” indicates whether the font is an English font or a Japanese font (0: English, 1: Japanese).
“Font number” is, for example, “A” “I” “A” “b”
And to specify a specific font such as std
Font and bmp font respectively. The “font number” is prepared from 0 to 511. The “color number” is used only when the std font is designated, and is used to specify a color combination of the std font. “Color number” is prepared from 0 to 255. Note that the “color number” is “10000000b” when the bmp font is used.
(= 128) "is set.

The second controller 52 stores a font designation table, a color combination designation table, and a color pallet table.

The font designation table is a table indicating the head address of font data constituting a font. The font data is stored in the flash memory 53 as described above. As shown in FIG. 3, the font specification table stores font data of the std font (hereinafter, “std font”) for each of English and Japanese.
Font data. " ) And bmp font data (hereinafter referred to as “bmp font data”)
Is shown.

For example, the "font type" of the control command
"Language" and "Font number" are "1", "0" and "0" respectively.
If "00000010" is indicated, the font designation table specifies the font number 2 of the English bmp font, and obtains the start address "bmpchar2".

The color combination designation table is a table for designating a combination of characters, background, and trimming colors constituting the std font. Specifically, as shown in FIG. 4, the color combination designation table has 256 combinations of a character color, a background color, and a frame. Color numbers 0 to 255 are assigned to these 256 combinations. As the character color and the background color, numerical values (color pallet numbers) from 0 to 15 are indicated. The color pallet number is for specifying a certain color, and is a number for specifying one of 16 colors since there are 0 to 15. Although the border is fixed to a single black color, any one of the color numbers from 0 to 15 may be indicated similarly to the character color and the like.

As shown in FIG. 5, the color pallets indicate the levels of the luminance signal Y and the chroma signals Cb, Cr constituting the colors indicated by the color pallet numbers 0 to 15. That is, each color palette number is
Since the ratios of the luminance signal Y and the chroma signals Cb and Cr are different, different colors are shown.

As shown in FIG. 6, the flash memory 53 stores std font data and bmp font data. As shown in FIG. 7, the std font data includes “number of horizontal dots”, “number of vertical dots”, “offset”, “character data”, and “trimming data”. The “number of horizontal dots” is composed of 2 bytes, and st
This indicates the number of horizontal dots of the d font. The “number of vertical dots” is composed of 2 bytes and indicates the number of vertical dots of the std font.

The "offset" is composed of 2 bytes,
It indicates the number of words from the head of the table to the head of the dot information of the trimming part. In other words, as shown in FIG. 7, it indicates from the beginning of the “number of horizontal dots” to the beginning of the “trimming data”, and specifically, is a value indicating (6 bytes + the number of bytes of character data). is there. In addition,
It does not exist if there is no border.

"Character data" indicates a character with one bit per dot in the rightward order with the upper left corner of the font as the vertex. For example, as shown in FIG. 8A, a case where a character “U” is shown will be described as an example. The std font is composed of 6 dots × 3 dots. The upper left dot is (0, 0), the lower right dot is (2, 5), and “1” is added to a dot indicating a character, and a portion other than the character is added. When 0 is added, the result is as shown in FIG. FIG. 8C shows the information of each dot sequentially from the upper left to the right. This is the “character data” described above. Note that this character data is packed from the upper bits in word (16 bit) units, and stores the remaining lower bits that remain even if the line changes in the middle. If there is a remaining lower bit that stores the last (lower right) information, "0" is filled.

The "trimming data" has the same structure as the "character data", in which "1" is added to dots indicating trimming and "0" is assigned to non-trimming portions. If there is no trimming portion in the std font, the "trimming data" does not exist.

As shown in FIG. 9, the bmp font data includes "number of horizontal dots", "number of vertical dots", and "dot information".
It is composed of "Number of horizontal dots" and "Number of vertical dots"
Is the same as that of std font data. “Dot information” is information for specifying the color pallet number of the color pallet shown in FIG. 5 for each dot constituting the bmp font. Specifically, "dot information"
Data is stored with 4 bits per dot in the right direction with the upper left corner of the bmp font as the vertex. That is, since the bmp font data is configured by specifying a color by an arbitrary color pallet number per dot, characters can be freely configured without limiting the number of colors of each dot. The bmp font data is packed from the upper bits in word (16 bits) units, and stores the remaining lower bits that remain even if the line changes in the middle. If there is a remaining lower bit that stores the last (lower right) information, "0" is filled.

The recording medium 56 stores the image data compressed by the JPEG circuit 26 via a recording medium I / F 55. On the other hand, the JPEG circuit 26 JPEG-decompresses the compressed image data read from the recording medium 56 and supplies it to the video encoder / decoder 24 and the like.

The camera device 1 having such a configuration includes an LCD
A subject is displayed at 40 and characters (characters) constituting a menu or the like are displayed. As described above, there are two types of fonts for this character, the std font and the bmp font, which can be selected by the user.

First, a case where the user operates an operation unit (not shown) to select a Japanese std font will be described.

The first controller 51 generates control commands for "font type (= 0)" and "language (= 1)". Here, “font number” and “color number” are “000000000b (= 0)”,
It is assumed that “00000010b (= 2)”.

Upon receiving the control command, the second controller 52 refers to the font specification table.
The second controller 52 is, specifically, a Japanese st.
Refer to the start address “stdcharJ0” indicated by the font number 0 for the d font, and select the st indicated by the start address.
The d font data is read from the flash memory 53 and supplied to the data processing unit 20. The memory controller 22 stores the std font data in the image memory 3
Expand to 0. The std font includes a trimming portion, and trimming data is also expanded in the image memory 30.

Further, the second controller 52 is provided as shown in FIG.
As shown in FIG. 7, the color number 2 in the color combination table is referred to. In the color number 2, the color pallet number of the character color is 2, and the color pallet number of the background color is 0.
Then, the second controller 52 refers to the color palette, sets the luminance signal Y and the chroma signals Cb and Cr indicated by the color pallet number 2 for the character color, and sets the color pallet number 0 for the background color. The luminance signal Y and the chroma signals Cb and Cr are set. The memory controller 22
The character color and background color data set by the second controller 52 are developed on the image memory 30.

The memory controller 22 composes character data by expanding data such as std font data and character colors on the image memory 30 as described above, and converts the character data into the video encoder / decoder 24, D / A The LCD 4 via the converter 25
Supply 0. As a result, a character in the std font is displayed on the LCD 40.

Next, a case in which the user operates an operation unit (not shown) to select an English bmp font will be described.

The first controller 51 generates control commands for "font type (= 1)" and "language (= 0)". Here, “font number” and “color number” are respectively “000000000b (= 1)”,
It is assumed that “10000000b (= 128)”.

Upon receiving the control command, the second controller 52 refers to the font specification table.
The second controller 52 is, specifically, an English bmp
Refer to the head address “bmpchar1” indicated by the font number 1 for the font, and check the bmp indicated by the head address.
The font data is read from the flash memory 53.
The second controller 52 further sets the color of each dot constituting the font with reference to the color palette. The memory controller 22 develops the color data for each dot set by the second controller 52 on the image memory 30.

The memory controller 22 stores, in the image memory 30, a bmp with a specified color for each dot.
Character data is formed by expanding the font data, and the character data is transmitted to the LC encoder / decoder 24 and the D / A converter 25 through the LC / LC converter.
D40. As a result, the characters in the bmp font are displayed on the LCD 40.

As described above, the camera device 1 can display characters such as menus on the LCD 40 using the bmp font as well as the std font that is usually used frequently. That is, since the bmp font can be used, the number of colors used for one font can be greatly increased, and the font can be freely designed.

Since the color designation of each dot of the bmp font uses the color pallet number of the color pallet, the color designation of each dot can be facilitated and the amount of font data becomes enormous. Can be avoided.

That is, since the camera device 1 requires only a small amount of data, the processing speed can be increased, and characters using various colors can be displayed on the LCD 40.

Although the present embodiment has been described with reference to the case of characters as an example of character display, the present invention is not limited to this. For example, the present invention can be applied to a case where an icon is displayed as a character on the LCD 40.

Also, for Japanese and English,
Although the case where there are d fonts and bmp fonts has been described by way of example, it goes without saying that the same can be applied to the case where another language is added, but it is also possible to use only one language.

Further, the camera device 1 may include a ROM for storing a control program for performing the above-described processing. Then, if the control program is installed from a recording medium on which the control program is recorded, it is possible to display characters of the std font or the bmp font.

[0047]

As described above in detail, according to the image display device, the image display method and the recording medium storing the image display control program according to the present invention, the first font and its color designation number are selected. The first
And the color information corresponding to the same color designation number as the selected color designation number is read from the storage means, and when the second font is selected, the second font information is read from the storage means. By reading and displaying a font based on the read information, it is possible to display not only the first font having a limited number of colors but also a second font which can be freely designed without any limitation of the number of colors. it can. As a result, it is possible to prevent the amount of font data from becoming enormous, and to perform higher-speed processing with a smaller amount of data.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a camera device to which the present invention has been applied.

FIG. 2 is a diagram showing a control command generated by a first controller of the camera device.

FIG. 3 is a diagram illustrating a font designation table stored in a second controller of the camera device.

FIG. 4 is a diagram showing a color combination designation table stored in a second controller.

FIG. 5 is a diagram showing a color palette stored in a second controller.

FIG. 6 shows s stored in the flash memory of the camera device.
FIG. 4 is a diagram illustrating td font data and bmp font data.

FIG. 7 is a diagram showing a specific configuration of std font data stored in a flash memory.

FIG. 8 is a diagram for specifically describing character data constituting std font data.

FIG. 9 is a diagram showing a specific configuration of bmp font data stored in a flash memory.

FIG. 10 is a diagram showing a reference procedure of each table of the second controller when reading out color data of a std font.

[Explanation of symbols]

1 camera device, 22 memory controller, 30 image memory, 40 LCD, 51 first controller, 52 second controller, 53 flash memory

Continuation of the front page (72) Inventor Katsuhiko Watanabe 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 5C023 AA18 AA37 AA38 CA01 CA06 DA02 DA04 5C025 CA02 CA09 CB10 DA08 5C082 AA27 BA02 BA34 BB32 BB51 CA12 CB01 DA87 MM04 MM10

Claims (9)

[Claims] 1. A color pallet storage means for storing a color pallet comprising a plurality of color designation numbers and color information corresponding thereto, first font information constituting a font not containing a color, and a font containing a color. Font information storage means for storing second font information to be constituted; color combination information storage means for storing information of a color combination of a color of the first font and a color of a portion other than the first font; Selecting means for selecting the first font and its color designation number or the second font; and when the first font and its color designation number are selected by the selecting means, the font information is stored in the font information storage means. The first font information is read, and the color information corresponding to the same color designation number as the selected color designation number is read from the color pallet storage means. Than the second
When the font is selected, there is provided reading means for reading the second font information from the font information storage means, and display means for displaying a font based on the information read by the reading means. Image display device. 2. The font information storage means stores second font information constituted by specifying a color designation number for each pixel constituting a font, and the reading means stores the second font information by the selection means. Is selected, the color designation number for each pixel, which is constituted as the second font information, is read from the font information storage means, and corresponds to the same color designation number as the read color designation number. 2. The image display device according to claim 1, wherein color information is read from said color pallet storage means. 3. The color pallet storage means stores a color pallet comprising a plurality of color designation numbers, color information corresponding to each color designation number, and border color information corresponding to each color designation number. The storage means stores first font information including a font containing no color and border information indicating whether or not the font is bordered, and the reading means uses the selection means to store a first font and a color designation number thereof. Is selected, the first font information is read from the font information storage means. When the border information included in the first font information indicates that border is present, the same color as the selected color designation number is used. The color information and the border color information corresponding to the designated number are read from the color pallet storage means, and the border information included in the first font information is determined to be borderless. The image display apparatus according to claim 1, wherein the read only color information corresponding to the same color designation number with the selected color designation number from the color palette memory means when referring to. 4. A color palette comprising a plurality of color designation numbers and color information corresponding thereto, first font information constituting a font containing no color, and second font information constituting a font containing a color And information of a color combination of the color of the first font and the color of the part other than the first font is stored in the storage means. When the first font and its color designation number are selected, The first font information is read from the storage means, and color information corresponding to the same color designation number as the selected color designation number is read out from the storage means. When the second font is selected, And reading the second font information from the second font information, and displaying a font based on the read information. 5. The storage means stores second font information in which a color designation number is specified for each pixel constituting a font. When a second font is selected, the storage means stores the second font information. Reading a color designation number for each pixel configured as the second font information from the means, and reading color information corresponding to the same color designation number as the read color designation number from the storage means. The image display method according to claim 4. 6. The storage means includes: a plurality of color designation numbers;
A color pallet including color information corresponding to each color designation number and border color information corresponding to each color designation number is stored, and a first palette including a font that does not include a color and border information indicating whether or not the font is bordered. When the first font and its color designation number are selected, the first font information is read out from the storage means, and the border information included in the first font information is bordered. When indicating the presence, the color information and the border color information corresponding to the same color designation number as the selected color designation number are read from the storage means, and when the border information included in the first font information indicates no border, 5. The image display method according to claim 4, wherein only color information corresponding to the same color designation number as the selected color designation number is read out from said storage means. . 7. A color palette comprising a plurality of color designation numbers and color information corresponding thereto, first font information constituting a font not containing a color, and second font information constituting a font containing a color And information on the color combination of the color of the first font and the color of the part other than the first font is stored in the storage means. When the first font and its color designation number are selected, The first font information is read from the storage means, and color information corresponding to the same color designation number as the selected color designation number is read out from the storage means. When the second font is selected, And a second medium for reading an image display control program for displaying a font based on the read information. 8. A second font information stored by specifying a color designation number for each pixel constituting a font, and when the second font is selected, the second font information is stored in the storage means. An image display control program for reading out a color designation number for each pixel configured as font information of the pixel and reading out color information corresponding to the same color designation number as the read color designation number from the storage means. A recording medium recording the image display control program according to claim 7. 9. A color palette including a plurality of color designation numbers, color information corresponding to each color designation number, and border color information corresponding to each color designation number is stored, and a font containing no color and a font of the font are stored. First font information including border information indicating the presence or absence of border is stored, and when the first font and its color designation number are selected, the first font information is read from the storage means and When the border information included in the first font information indicates that there is a border, color information and border color information corresponding to the same color designation number as the selected color designation number are read from the storage means, and the first font information is read. When the border information included in the image information indicates no border, only the color information corresponding to the same color designation number as the selected color designation number is read from the storage means. 8. A recording medium recording an image display control program according to claim 7, wherein the control program is recorded.