JPH05307357A - Map data display device - Google Patents

Abstract

PURPOSE:To execute a display in a hue corresponding to designation by processing arithmetically color expression elements in plural color codes contained in reproduced map data by a specific fixed parameter and changing its color. CONSTITUTION:At the time of designating a color, first of all, a color number (color code) provided in a color pallet specified by a color pallet 16 is designated, and three-primary color data is supplied to an RGB data generating part 18. The RGB data generating part 18 generates primary color signal data for allowing a color number in a V-RAM 17 in which map data is written and a color number of the designated color pallet to correspond to each other. In this case, the RGB data generating part 18 selects a change condition applied to each element of plural sets of fixed parameters corresponding to a change of a hue, etc., by selecting a display parameter for showing a change of the hue, etc. Subsequently, in accordance with this change condition, the fixed parameter to each element of the three-primary color signal is calculated, and a color display on a display screen is changed to a desired display.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map data display device for displaying the color of map data read out from a recording medium in which map data is digitally recorded, and more particularly to a map data display device using three primary color RGB signals represented by digital values. The present invention relates to a map data display device suitable for use in displaying map data.

[0002]

2. Description of the Related Art A display device for reading out and displaying recorded map data from a recording medium has the following structure. The hardware configuration of this display device is defined at a minimum by the display resolution, display color, character font, and the like. The recording medium is designed with the standard of the format of the recording medium based on this regulation.

At the same time, a standard of assumed hardware for reading out map data from a recording medium is being studied.
The main assumed hardware standards examined here are, for example, first that the display device is a color cathode-ray tube (and a display device corresponding thereto) for receiving television of about 6 inches, and the display resolution is 320 dots (horizontal direction) × About 210 dots (vertical direction) can be displayed.

Second, the color display capability of each pixel is 409.
The number of colors that can be simultaneously developed from the six colors is 32 colors or more and can be selectively displayed.

Thirdly, as for the character font, the hardware has a font of 16 dots × 16 dots up to the JIS second level. As another standard, the common understanding of the relationship between hardware capability and software production is maintained, and fields are arranged in even byte boundaries so as not to reduce the data access efficiency.

The digital data read out from the recording medium in this manner is supplied to the display device and displayed so as to reduce the load on the hardware. Also, if there is only one color designation method by software that displays map data, it is possible to designate RGB data as an absolute value when changing the color tone of the map on the hardware side that uses the software.

[0007]

By the way, when displaying digital data read from a recording medium, the display screen may be difficult to see depending on the installation location of the display device and the ambient brightness. The display device needs to change drawing parameters such as brightness and contrast of the device so that the roads and characters on the map can be easily seen according to the surrounding environment. However, a display screen that is easy to see is not simply adjusted by the brightness and contrast of the device, and it is necessary to change the color tone of the map itself on the display screen.

However, in a display device that uses a red (R) green (G) blue (B) signal for color display in the display device, the color tone cannot usually be adjusted. For this reason,
The color designation data read from the recording medium was displayed as it was.

If there is only one color designation method by software for displaying map data, RGB data is designated by absolute values on the hardware side using the software as described above when changing the color tone of the map. be able to. However, when there are a plurality of color designation methods by the software for displaying map data, the colors of the map exist according to the designated software for displaying map data. Therefore, the color tone set by the user changes for each software, and it becomes necessary to reset the color designation setting to a desired color.

Therefore, the present invention has been made in view of such a situation, and when the digital data read from the recording medium is displayed, the setting is changed to the color designation according to the designation by the user, and other It is an object of the present invention to provide a map data display device capable of displaying the color tone image set as above while maintaining compatibility of color designation between software.

[0011]

A map data display device according to the present invention reads map data in which map data having a plurality of color codes is recorded and displays a map data in color according to the color code. In the apparatus, a set of fixed parameters for changing the color expression elements in the plurality of color codes included in the reproduced map data is provided, and the fixed parameters are set in the color expression elements of the plurality of color codes. The above-mentioned problems are solved by performing a calculation process to change the color.

Here, the elements of the color expression are, for example, RGB signals of three primary colors. When the color is changed with the three primary color RGB signals, a new set of three primary color RGB signals is obtained by performing arithmetic processing on each element of fixed parameters corresponding to each signal of the three primary color RGB signals and each signal of the three primary color RGB signals. Make up. The color expression is changed by using this new set of RGB signals of the three primary colors.

Further, a plurality of sets of fixed parameters for changing the color tone, brightness and contrast of the color code display color by changing the elements of the color expression are set, and these fixed sets are set. The above problem is solved by changing the color tone, brightness, and contrast of the plurality of color codes by selecting one of the fixed parameters.

The fixed parameters include fixed parameters corresponding to a plurality of color tones, brightness and contrast. This fixed parameter is composed of a set of changing elements corresponding to the elements of color expression. In changing the color tone, this set of fixed parameters is, for example, the three primary colors R
When it is desired to emphasize the red (R) of the GB signal, the brightness level x is added to the brightness level R as a fixed parameter, and half the value x of the added brightness level is added to the other primary color signals G and B.
It is represented by (x, -x / 2, -x / 2) after subtraction by / 2. By calculating with this set of fixed parameters, a display in which red is emphasized in the color display designated in advance (R +
x, G-x / 2, b-x / 2).

The above-mentioned problem is solved by changing the color with the fixed parameter for a part of the plurality of color codes of the map data.

Here, the color change target can be limited to only the color of the road or background on the map, and the individual color change can be performed.

[0017]

The map data display device of the present invention reads the map data in which the map data having a plurality of color codes is recorded, and displays the map in color according to the color code. A set of fixed parameters for making changes to the color expression elements in the multiple color codes included in the map data is provided, and color calculation is performed on the color expression elements of the multiple color codes by the fixed parameters. Make changes to make multiple types of color changes.

In the plural kinds of color changes, the color display of color tone, brightness and contrast is changed according to the change of the element of the fixed parameter. In particular, the color tone can be changed even in a display to which RGB signals of three primary colors are supplied.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the map data display device according to the present invention will be described below with reference to the drawings.

A map data display device according to the present invention will be described with reference to the schematic block configuration shown in FIG. Here, the map data is an optical disc that can be stored as a large amount of digital data, such as a CD-R.
Written to OM10.

The CD-ROM drive unit 12 is controlled according to a key input signal from the key operation unit 11. This CD-R
The OM drive unit 12 outputs the CD-R according to the output drive signal.
The OM 10 is driven and controlled. Along with this drive control, the data read circuit 12A in the data read section 13 is a CD-ROM.
The recorded information is read from 10. The data read circuit 13A for reading this information is provided in the optical pickup 13
a and the signal processing circuit 13b. The information from the signal processing circuit 13b is displayed on the display 19 via the map data display device.

The map data display device includes a data reading section 13 which is a data input means for taking in reproduced information and a key signal, and a RAM for temporarily storing the reproduced information.
14 and a CPU 15 which is a data processing means for processing data in accordance with the information from the RAM 14 and the key signal.
And a color palette unit 16 which is a color information storage unit for outputting the RGB values of the three primary colors stored in correspondence with the control of the CPU 15, and V- which temporarily stores information in the array of the display screen under the control of the CPU 15. RAM17 and the V-RAM17
An RGB data creating unit 18 that is an RGB data creating unit that outputs information to the display device in association with the information stored in the color palette unit 16 and the RGB values of the three primary colors from the color palette unit 16;
The display 19 is a display unit that displays information from the data creation unit 18.

Next, the operation based on this circuit configuration will be described with reference to FIG. The map data display device reads a key signal from a key operation unit 11 provided outside into a key input circuit 13B in the data reading unit 13. In response to this key signal, the CPU 15 causes the CD-ROM drive unit 1 to
2 is controlled. CD-ROM according to this drive control
The digital data recorded in 10 is read via the optical pickup 13a in the data reading section 13, and the read information is supplied to the signal processing circuit 13b. The read information is input from the signal processing circuit 13b to the data reading circuit 13b of the data reading unit 13. The reproduced data is stored in the RAM 14 via the data reading circuit 13b.

In addition to this, the CPU 15 can also fetch and display the current position information from the global positioning system (GPS) receiving device 20 from the outside, for example. In this way, by displaying the current position information on the map, the navigation system can be configured.

The data from the RAM 14 is supplied to the V-RAM 17 and the color palette section 16 via the CPU 15. Map data is written in the V-RAM 17 under the control of the CPU 15. The data structure of this map data is a structure that reduces the load on the hardware when accessing color information and the like. For example, 16 colors used for maps are registered in the data structure in the color palette to be referred to. The 16-color data corresponds to the color number of the color display element in the color palette, and the values of the three primary color RGB signals are stored in the group corresponding to this color number. Therefore, the RGB values of the three primary colors on the color palette can be taken out by designating this color display element by the color number.

In this way, the color code is useful in using software to reduce the burden on hardware. A color number (color code) provided in the color palette section 16 without designating the color to be directly displayed when designating this color
Specify with.

The color palette section 16 is composed of a plurality of color palettes, and may be collectively referred to as a color lookup table. In the software for displaying the map data in the color palette unit 16, the color code per color palette, for example, from 4096 colors to 16 colors (# 0 to # 15) for the map is registered in the data structure.

For the colors actually displayed, first, the color palette to be used is specified by referring to the parameter set table in which the drawing parameter data is written. Further, the color code of, for example, 16 colors provided in the color palette is designated, and the data of the three primary colors REG is supplied to the RGB data creation unit 18.

The RGB data creation unit 18 associates the color numbers in the V-RAM 17 in which the map data corresponding to each pixel is written with the color numbers of the designated color palette, and makes the three primary colors RGB necessary for display. Create signal data. At this time, the RGB data creating unit 18
By selecting a display parameter indicating a change in brightness and contrast, a condition for selecting what kind of change is to be made to each element of the fixed parameter is selected.

Next, according to the selected conditions, four color arithmetic operations of fixed parameters for each element of the three primary color RGB signals which are elements of color expression are performed to change the color display on the display screen to a desired color display by the user. Can be made

Further, even if the CD-ROM 10, that is, the software is replaced, the color compatibility can be maintained without changing the image of the color tone set by the user even if the usage of the color is different for each software. This specific method will be described later.

The means for changing the value of the element of the color expression is not limited to the RGB data creating section 18, and each fixed parameter for the value of the element of the color expression selected by the color palette 16 is used. Even if the four arithmetic operations are performed on the elements, it is possible to similarly change a plurality of types of color tone, brightness and contrast.

By supplying the data of the RGB signals of the three primary colors to the display 19, it is possible to display the color designation as desired by the user. In this way the three primary colors RG
It is possible to change the color tone on the display using the B signal.

Next, a description will be given of the setting and the setting condition for changing a plurality of types of color tone, brightness and contrast in the RGB data creating section 18. The data structure can be specified by a color number (color code) in order to register the basic parameters such as drawing so that the compression of the data and the flexibility of the expression are compatible and the capacity is limited. Therefore, the CD
The map data read from the ROM 10 is specified by the color palette unit 16 as described above, and the color number in the specified color palette is, for example, 16 colors, that is, 4
The bit defines the brightness level of each RGB signal of the three primary colors.

In the color display according to the brightness level of each of the three primary colors, the RGB signals of the three primary colors are both 15 (“F” in hexadecimal display).
To the "white" peak level of the display device when
In addition, when both of the three primary colors RGB are 0, the "black" level is set,
Each luminance in the meantime is linearly quantized with 4 bits.

The map data display device of the present invention is provided with a set of fixed parameters for changing the elements of the color expression in the plurality of color codes included in the reproduced map data. The fixed parameter is, for example, added as a color display change component to the color display element in the color palette designated by a plurality of display parameters associated with the color display change. In this way, the color change is performed by performing arithmetic processing on the elements of the color expression of the plurality of color codes with the fixed parameters.

The fixed parameters include a plurality of fixed parameters corresponding to changes in color tone, brightness, and contrast, and each fixed parameter is composed of a set of changing elements corresponding to elements of color expression. To change the color, select one set of this fixed parameter and add each element in this selected fixed parameter to some color codes in multiple color codes. By substituting, the color display of the color tone, brightness, and contrast set by the original software is changed.

A more specific example of arithmetic processing will be described with reference to Table 1. For example, the key operation unit 11 provided outside the apparatus is provided with keys representing images of color tones such as “cool”, “warm”, “dark”, “bright”, “mild”, and “sharp”.

[0039]

[Table 1]

The setting of each key is changed so that "cool" emphasizes blue (B), "warm" emphasizes red (R), and "green" emphasizes green (G). If you select the "Dark" key, 3
All luminance levels of the primary color RGB signals are reduced. on the other hand,
If the "bright" key is selected, all the brightness levels of the RGB signals of the three primary colors are raised. In addition, "mild (dim)" has a small difference in the luminance level of each of the three primary color RGB signals, while
When the "sharp" key is selected, calculation is performed so as to increase the difference in brightness level between the RGB signals of each of the three primary colors. In this way, when the user selects one of the above-mentioned keys, in the selection mode for changing, the user sets the items of the three primary colors RGB that need to be changed according to the mode.

Here, in the display of each of the three primary colors RGB, for example, the brightness level of each of the three primary color RGB signals is displayed within 16 levels as described above. That is, not only the brightness level is added to the color to be emphasized, but also the subtraction process is performed in consideration of other brightness levels at the same time while satisfying the display condition within the range of maximum 16 and minimum 0. There is.

For example, in the calculation processing of "cool", "warm" and "green" shown in Table 1, the value of the fixed parameter x added to one luminance level to be emphasized is "+4", while the other luminance levels are x. The subtraction process is performed by / 2 = 4/2 = 2. In this way, the total three primary colors R
The brightness level of the GB signal is kept constant.

In each mode, it is necessary to set the upper and lower brightness level conditions for this brightness level. If this process is not performed, for example, the region where the maximum exceeds 16 is increased by the brightness level addition process, and the entire screen of the displayed map becomes white. From this, in particular, in the cases of "dark" and "bright" shown in Table 1, it is possible to prevent the image from becoming too dark or the image from jumping white.

For example, in the case of "dark", when the lower limit luminance level is set to 2, in the calculation processing for changing the luminance signal level, all the three primary color RGB signals have the luminance level of the calculation result below the lower limit luminance level 2. Brightness level is suppressed to 2. Further, if even one luminance level reaches the lower limit luminance level 2 or less, the difference between the luminance level before the calculation and the luminance level 2 is subtracted from the luminance levels of other colors.

On the contrary, in the case of "bright", when the upper limit luminance level is set to 14, all the calculation processing for changing the luminance signal level is performed with the three primary color RGB signals as the upper limit luminance level 1.
When the brightness level of the calculation result becomes 4 or more, the brightness level is suppressed to 14. Further, if even one luminance level reaches the upper limit luminance level 14 or higher, the difference between the luminance level before calculation and the luminance level 14 is added to the luminance levels of other colors.

In the case of "sharp", a complicated calculation process is performed. Briefly, if the brightness level is 8 or more as shown in Table 1, the calculation process adds 1 to the brightness level. If the brightness level is 7 or less, 1 is subtracted from the brightness level. Since the color tone, the brightness, and the contrast can be changed by the calculation processing of the fixed parameters in this way, the color display can be changed only for the target of the desired map.

As described above, the map data display for displaying the digital data in color by supplying the display device with the values of the elements of the color number corresponding to the color palette and the brightness levels of the three primary color RGB signals calculated by the fixed parameters. The color tone can be easily changed in the device, and the color display can be changed according to the surrounding environment.

If a desired brightness level to be changed for the selected color palette is set, the user can use this level setting without newly setting the software for different CD-ROMs. The map can be displayed in the desired color image set by. By changing the color tone only for the desired color designation in the selected mode, it is possible to emphasize and display only the target road, for example.

[0049]

As is apparent from the above description, according to the map data display device of the present invention, the map data in which the map data having a plurality of color codes is recorded is read and the map is displayed according to the color code. In a map data display device for displaying in color, a set of fixed parameters for making changes to color expression elements in a plurality of color codes included in the reproduced map data is provided, and the color of the plurality of color codes is set. By changing the color by performing arithmetic processing on the elements of the expression with the above fixed parameters, it is possible to display according to the user's preference according to the surrounding environment, for example, to change the color display at day and night. Can be used. The map can be displayed on the image of the color set by the user without newly setting the software of different CD-ROM.

The map data display device sets a plurality of sets of fixed parameters for changing the color tone, brightness and contrast of the color code display color by changing the elements of the color expression, and these are set. By selecting one of the fixed parameters of
By changing the color tone, brightness, and contrast of the plurality of color codes, it is possible to perform color display by changing the color tone even on a display that uses, for example, three primary color RGB signals made up of digital data.

Further, the map data display device performs the above-mentioned color change by the above-mentioned fixed parameter to a part of the plurality of color codes of the above-mentioned map data, thereby designating a desired color such as road. It is also possible to emphasize and display only.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic block configuration of an embodiment in a map data display device according to the present invention.

[Explanation of symbols]

 10 --- CD-ROM 11 --- key operation unit 12 --- CD-ROM drive unit 13 ..... Data reading unit 14 ..... RAM 15 ..... CPU 16 ...・ ・ ・ ・ ・ ・ ・ Color palette 17 ・ ・ ・ ・ V-RAM 18 ・ ・ ・ ・ ・ RGB data creation unit 19 ・ ・ ・ ・ ・ ・······display

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kinichiro Nakano 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (3)

[Claims] 1. A map data display device for reading out map data in which map data having a plurality of color codes is recorded and displaying a map in color according to the color code. A set of fixed parameters for changing the color expression elements in the color code is provided, and the color change is performed by performing arithmetic processing on the color expression elements of the plurality of color codes by the fixed parameters. Map data display device. 2. A plurality of fixed parameters for changing the color tone, brightness and contrast of the color code display color by changing the elements of the color expression are set, and these fixed parameters are set. The map data display device according to claim 1, wherein the color tone, brightness, and contrast of the plurality of color codes are changed by selecting one of the fixed parameters. 3. The map data display device according to claim 1, wherein the color change is performed with respect to a part of the plurality of color codes of the map data by the fixed parameter.