JP2004070221A - Map display system and program for map display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To edit various display images using satellite photographic data by performing easy-to-see display in response to a difference in an environment by using one image data. <P>SOLUTION: The map display system comprises a storing means 1 for storing raster type map data, an environment change detecting means 9 for detecting environment change, control means 4 and 6 for modifying color tone of the raster type map data in accordance with the environment change detected with the environment change detecting means, and a display means 7 for displaying the map data modified with the control means. The raster type map data are displayed easy to see in response to the environment change. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a map display device and a map display program for editing and displaying a map according to selection of editing information.
[0002]
Problems to be solved by the prior art and the invention
Various proposals have been made regarding display of a map in a vehicle navigation device (for example, see Patent Documents 1 and 2). For example, when displaying a route guide map on the display screen, change the brightness of the display screen according to the time or change the color palette so that the surrounding brightness changes during the daytime and nighttime and the displayed contents are not easy to see. There is a system that performs display. However, since the color is changed using the color pallet, there is a problem that it takes a long processing time, and particularly when there are many colors to be changed, it takes a longer time.
[0003]
In another proposal, two types of satellite photograph data, daytime and nighttime, are stored in a storage medium, and the satellite photographing data for daytime and nighttime satellite photograph data are stored in conjunction with the lighting switch of the vehicle. Is described. However, in this case, a storage medium for storing two pieces of satellite photograph data at the same place is required, and there is a problem that the cost of the entire apparatus increases.
[0004]
[Patent Document 1]
JP-A-5-018767 (paragraphs [0022]-[0026], FIG. 6)
[Patent Document 2]
JP-A-2000-283784 (paragraph [0025])
[0005]
[Means for Solving the Problems]
The present invention is to solve the above-mentioned problem, and to provide easy-to-view display according to a difference in environment using one image data, and to enable editing of various display images. It is.
[0006]
For this purpose, the invention according to claim 1 includes a storage unit that stores map data in a raster format, an environment change detection unit that detects a change in environment, and an environment change detected by the environment change detection unit. A control means for changing the color tone of the raster-format map data, and a display means for displaying the map data changed by the control means are provided.
[0007]
According to a second aspect of the present invention, in the first aspect of the present invention, the map data is divided into a plurality of blocks, and the divided raster data has position information of a representative point. It is.
[0008]
According to a third aspect of the present invention, in the first aspect of the present invention, the environment change detection unit detects an environment change based on GPS information.
[0009]
According to a fourth aspect of the present invention, in the first aspect of the present invention, the environment change detecting means determines day or night based on whether or not a light of the vehicle is turned on. It is characterized by the following.
[0010]
According to a fifth aspect of the present invention, in the first aspect of the present invention, the environmental change detecting means determines a current season based on GPS information. .
[0011]
According to a sixth aspect of the present invention, in the first aspect of the invention, the control means changes the RGB values of the map data based on predetermined color information and transmittance information. It is characterized by the following.
[0012]
According to a seventh aspect of the present invention, in the first aspect of the present invention, the storage unit further includes vector map data and current position mark information, and the control unit changes the color tone. It is characterized in that the map data in the raster format is overwritten with the vector map data of the guide route to the destination.
[0013]
According to an eighth aspect of the present invention, in the first aspect of the invention, the control means changes a color tone when the raster map data is drawn in a drawing memory. Things.
[0014]
According to a ninth aspect of the present invention, in the invention according to any one of the first to eighth aspects, the control means adjusts a color tone when outputting the raster format map data drawn in a drawing memory to the display means. It is characterized by being changed.
[0015]
According to a tenth aspect of the present invention, there is provided a map display program for displaying a map based on raster data stored in storage means and a change in environment detected by environment change detection means,
Detecting a change in the environment by the environment change detection means;
Changing the color tone of the raster-format map data according to the change in the environment detected by the step of detecting a change in the environment;
Displaying the map data changed by the color change step;
Which is characterized by having
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a map display device according to the present invention, wherein 1 is a data storage medium, 2 is a data decompression processing unit, 3 is a primary storage memory, 4 is a drawing processing unit, 5 is a drawing memory, Reference numeral 6 denotes a display control unit, 7 denotes a display, 8 denotes an edit information holding unit, and 9 denotes an edit selection unit.
[0017]
In FIG. 1, a data storage medium 1 stores map data used for display, and a disk for storing various map data including high-compression rate satellite image data compressed by, for example, JPEG and uncompressed map data. (External storage medium DISC). The data decompression processing unit 2 reads out and decompresses the satellite photograph data stored in the data storage medium 1, stores the decompressed map data in the primary storage memory 3, and stores the uncompressed map data in the primary storage memory 3 through. Things.
[0018]
The primary storage memory 3 is a D-RAM, for example, which stores a map data of a certain range including a display area of the display 7 in order to display a map on the screen of the display 7 and enable a quick scrolling operation. The uncompressed map data read from the storage medium 1 and the satellite photograph data decompressed by the data decompression processing unit 2 are stored.
[0019]
The drawing memory 5 is, for example, a V-RAM for drawing an image to be displayed on the display 7 and is a memory having a size larger than the display area of the display 7, but may be a memory having almost the same size as the display area. . The drawing processing unit 4 performs a process of drawing map data stored in the primary storage memory 3 in the drawing memory 5, determines a display area, and displays data of the display area from the drawing area of the drawing memory 5. The display control unit 6 displays the information on the display 7.
[0020]
The editing information holding unit 8 sets and holds the editing information for editing the satellite photograph image displayed on the screen of the display 7 in the evening or night time zone and in the spring, summer, autumn, and winter seasons. Is what you do. The edit selection unit 9 selects the edit information held in the edit information holding unit 8, detects the change information of the environment, and responds to the change information. And the like, select seasonal edit information according to the date, and select edit information such as rainy or cloudy according to the weather.
[0021]
Next, an example of a specific process will be described. FIG. 2 is a diagram for explaining an example of drawing and display processing, FIG. 3 is a diagram for explaining an example of a process for converting a daytime satellite photograph into a nighttime image, and FIG. FIG. 5 is a diagram for explaining an example of another process when making a night image, and FIG. 5 is a diagram for explaining an example of a process for displaying a mark or a route on a satellite photograph.
[0022]
As the editing information held in the editing information holding unit 8, for example, if the editing information is to be edited for each season, pink as a flower is imaged in the spring as shown in a table in FIG. The color of the satellite photo is set by setting a semi-transparent color of blue, imagine the autumn leaves in autumn, and white in the image of snow in winter, and selecting these by date and blending and drawing the satellite photo image. Change. If the editing information is to be edited for the time zone, a semi-transparent color such as red in the evening and black in the dark at night is set as shown in the table in FIG. The color of the satellite photograph is changed by blending and drawing the image of the satellite photograph by selecting according to the time zone.
[0023]
In this case, each piece of editing information may be read out according to the date and time to change the semi-transparent color between spring evening and spring night, or change the semi-transparent color between spring evening and summer evening. Further, in addition to environmental changes during the day, evening, and night, and environmental changes during the spring, summer, autumn, and winter seasons, colors may be changed depending on the weather, such as sunny, cloudy, and rainy. The weather information for that purpose may be received from the information center, and may be subjected to a semi-transmissive process in a semi-transparent color corresponding to the received weather information. The determination of day, evening, and night and the determination of spring, summer, autumn, and winter are made by receiving GPS information.
[0024]
In this process, for example, as shown in FIG. 2A, first, a drawing area is calculated (step S11), and image data of the drawing area is read from the primary storage memory and written into the drawing memory (step S12). Then, the editing information is read from the table based on the current date or time, and semi-transparent processing is performed (step S13), and the result is displayed on the display.
[0025]
When the daytime satellite photograph is converted to a nighttime image as described above, as one method, as shown in FIG. 3, the nighttime color (black) is made semi-transparent on the image of the daytime satellite photograph (B) ( A satellite image (C) of a night image is expressed by blend drawing in (A). Further, as another method, as shown in FIG. 4, a layer 1 (A) filled with black at night is overlaid on a layer 2 (B) of a map with a satellite photograph image in a semi-transparent manner, so that The satellite photograph is expressed as a night image (C). Further, as shown in FIG. 5, when the own vehicle mark (the current position mark of the bitmap) and the route searched for (the guidance route of the vector data) (A) are superimposed on the satellite photograph (C), The own vehicle mark and the route (A) overwrite the satellite data (C) and the map data after the semi-transmissive processing by the black semi-transparent (B).
[0026]
FIG. 6 is a diagram for explaining an example of a process of switching display using one layer, FIG. 7 is a diagram for explaining an example of a process of switching display using two layers, FIG. 8 is a diagram illustrating a configuration example of a circuit that performs editing processing, and FIG. 9 is a diagram illustrating a configuration example of another circuit that performs editing processing. In the figure, reference numeral 4 denotes a drawing processing unit, 5, 5a and 5b denote drawing memories, 6a denotes an editing processing unit, 6b denotes a display processing unit, and 7 denotes a display.
[0027]
When the display shown in FIG. 3 is performed using one layer, for example, as shown in FIG. 6, first, the time is detected based on a clock or GPS data, and the illuminance is detected. The operation state of the vehicle, such as the operation of a switch operated at a time or the lighting of a light, is detected to detect day or night (step S21). Then, it is determined whether it is day or night (step S22). If it is day, the daytime satellite photograph is drawn in the drawing memory (step S23) and displayed on the display (step S27). This will be described with reference to the circuit shown in FIG. 8. The data of the drawing memory 5 is displayed on the display 7 through the display processing unit 6b, bypassing the editing processing unit 6a by the switch SW.
[0028]
If it is determined to be night, the satellite photograph of the day is drawn in the drawing memory (step S24), the transmittance is set (step S25), and the satellite photograph image is synthesized with semi-transparency (step S26). Display on the display is performed (step S27). This will be described with reference to the circuit shown in FIG. 8. When the switch SW is turned on, the data in the drawing memory 5 is edited at the transmittance set by the editing processing unit 6a, is synthesized semi-transparently, and is displayed on the display 7. become.
[0029]
In the case of performing the display shown in FIG. 4 using two layers, for example, as shown in FIG. 7, first, the time and date information are calculated by correcting the clock with the GPS or the clock with the GPS. To detect day or night by detecting the illuminance, or detecting the operation state of the vehicle such as the operation of a switch (ILM switch) operated during night driving or the lighting of a light (step S31). ). Then, day or night is determined (step S32). If day is determined, a daytime satellite photograph is drawn on the drawing memory on layer 1 (step S33) and displayed on the display (step S33). S38). This will be described with reference to the circuit shown in FIG. 9. The first drawing memory 5a is drawn by the drawing processing unit 4 with the image of the satellite photograph, and is displayed on the display through the display processing unit 6b, bypassing the editing processing unit 6a by the switch SW2. Become so.
[0030]
However, when it is determined to be night, the satellite photograph of daytime and daytime is drawn on the drawing memory on the layer 1 (step S34), and the satellite photograph is painted with a color transparent to the layer 2 (step S35). The setting is performed (step S36), the layer 1 and the layer 2 are overlapped (step S37), and the display on the display is performed (step S38). This will be described with reference to the circuit shown in FIG. 9. When both the switches SW1 and SW2 are turned on, the first drawing memory 5a is drawn by the drawing processing unit 4 as a satellite photograph image and transmitted through the second drawing memory 5b. They are painted in color, they are superimposed at the transmittance set by the editing processing unit 6a, and displayed on the display.
[0031]
Further, a specific method of changing a color tone by blend drawing will be described. First, for each of the three primary colors R (red), G (green), and B (blue), editing information of a color added as black for night or blue for summer is represented by R, for example. _P , G _P , B _P , Map data of satellite photos in pixel units ₁ , G ₁ , B ₁ , The transmittance is K, and the constant value determined by the date and time zone is A (R _A , G _A , B _A And
[0032]
One is a method of adding a value obtained by multiplying the transmitted color information by a transmittance and a value obtained by multiplying (1−transmittance) by the color information of the map data. Expressing this as an equation,
RGB values (R, G, B) at the pixel after transmission
= K × (R _P , G _P , B _P ) + (1-K) × (R ₁ , G ₁ , B ₁ )
It becomes.
[0033]
Another method is to add a value obtained by multiplying the transmitted color information by the transmittance to the color information of the map data. Expressing this as an equation,
RGB values (R, G, B) at the pixel after transmission
= K × (R _P , G _P , B _P ) + (R ₁ , G ₁ , B ₁ )
It becomes.
[0034]
Still another method is to subtract a certain value from the color information of the map data. Expressing this as an equation,
RGB values (R, G, B) at the pixel after transmission
= (R ₁ , G ₁ , B ₁ ) -A
It becomes.
[0035]
Usually used map data is so-called vector data composed of nodes and links, and has drawing element information (identification information of roads, buildings, backgrounds, rivers, etc.). , You can select and change the colors individually and freely. On the other hand, raster data is bitmap data composed of, for example, color information (information of lightness, hue, saturation, and color-separated RGB values) for each pixel, and is photographic data taken by satellite or aircraft. (Satellite photo data, etc.) and data obtained by processing the photo data. The raster data is divided into blocks, and each block of raster data has position coordinates of a representative point. Therefore, with such raster data, roads, buildings, backgrounds, rivers, and the like cannot be identified, and the present embodiment in which the color tone is changed by performing a semi-transparent process uniformly without selecting a drawing element, This is particularly useful for controlling the display of raster data on a map.
[0036]
The data of the satellite photograph only has information obtained by dividing the position information of each block into latitude and longitude information, and changing the latitude and longitude information into codes. When the position information is changed to code and the map data of each block is stored, a method of reading data around the current position is to determine a drawing area based on the current position, determine coordinates of the drawing area, and The raster data corresponding to the drawing area is determined from the area coordinates and the position information obtained from the raster data code.
[0037]
According to the present embodiment, by setting and selecting the semi-transparent color, the transmittance, and the composition ratio as described above, the image of the satellite photograph data is obtained by the semi-transparent color, the transmittance, and the composition ratio according to the setting and selection. Calculates semi-transparent colors or synthesizes semi-transparent color images to achieve semi-transparency. Therefore, one satellite photograph data can be obtained without having many satellite photograph data, which are large raster data. It can be used to provide an easy-to-read and easy-to-view display that does not cause discomfort according to differences in environments such as evening, night, spring, summer, autumn, winter, rainy weather, and cloudy weather. Therefore, a user-friendly map display can be performed. In addition, since the current position mark, the route, or the operation icon image operated by the user is simply drawn by overwriting the composite image and displayed, semi-transparency is performed by editing information according to various environmental differences. Also, the operation icon image can be displayed on the map with high visibility.
[0038]
FIG. 10 is a diagram showing an embodiment in which the map display device of the present embodiment is incorporated in a navigation device for a vehicle, an input device 11 for inputting information relating to route guidance, and a current device for detecting information relating to the current position of the own vehicle. A position detection device 12, an information storage device 13 storing navigation data necessary for calculating a route including satellite photograph data and road map data, display guidance data necessary for guidance, a navigation program, and the like; A central processing unit 14 that performs display guidance processing necessary for route guidance and controls the entire system, stores data necessary for navigation, and provides an information center provided via a communication line at the request of the driver, Between information sources such as an electronic organizer that stores driver-specific data such as data and destination data Information transmitting and receiving device 15 for exchanging data, is obtained by an output device 16 for outputting information relating to route guidance. First, each configuration will be described.
[0039]
The input device 11 has a function of inputting a destination and instructing the central processing unit 14 to perform a navigation process according to the driver's will so that the driver can output guidance information by voice and / or screen when necessary. As means for realizing the function, a touch switch or an operation switch for inputting a destination by a telephone number or coordinates on a map or requesting route guidance is provided. Of course, an input device such as a remote controller may be used. Here, a voice recognition device for enabling voice input and a recording card reading device for reading data recorded on an IC card or a magnetic card can be added.
[0040]
The information transmission / reception device 15 includes a VICS (Vehicle Information & Communication System) reception device and a data transmission / reception device that are traffic information acquisition means. VICS transmits road traffic information to vehicles in real time using FM multiplexing (text broadcasting), radio beacons, and optical beacons. FM multiplexing transmits coarse information over a wide area. Detailed information on a narrow area within a radius of about 10 km around the beacon, which can be received when the vehicle passes through the beacon. The VICS transmission data includes the degree of congestion (for example, the degree of congestion such as impassability, congestion, congestion, heavy traffic, normal traffic, etc.), the top position of congestion, the length of congestion, It is composed of regulations (construction information, road closures, etc.) and travel time (time required at a predetermined speed). The data transmission / reception device is, for example, a mobile phone or a personal computer, and exchanges information necessary for navigation with a traffic information center (for example, ATIS) at the request of a driver.
[0041]
The output device 16 has a function of outputting guidance information by voice and / or a screen when the driver needs it, and a function of printing out data processed by the central processing unit 14 and realizing the functions. Means for displaying input data on a screen, automatically displaying route guidance on a screen in response to a driver's request, displaying data processed by the central processing unit 14 and data stored in the information storage device 13. A printer for printing out and a speaker for outputting route guidance by voice are provided.
[0042]
The display is constituted by a color CRT or a color liquid crystal display used as a screen of the map display device in the present embodiment, and includes a satellite photograph screen, a route setting screen, and a section based on map data and guidance data processed by the central processing unit 14. All screens required for navigation, such as a diagram screen and an intersection diagram screen, are output in color display, and buttons for setting route guidance, performing guidance during route guidance, and switching screens are displayed on this screen. In particular, the passing intersection information such as the passing intersection name is displayed in color in a pop-up on the section map screen at any time. This display is provided, for example, in an instrument panel near the driver's seat, and the driver can check the current position of the own vehicle by looking at the section map and obtain information on a route from now on.
[0043]
The current position detection device 12 is a device that detects information on the current position of the vehicle, and includes, for example, an absolute direction sensor including a geomagnetic sensor, a steering sensor, a relative direction sensor including a gyro, and the like. It has a distance sensor for detecting the traveling distance and a GPS receiver using a satellite navigation system (GPS). Time and date information and its correction information can be obtained through this GPS receiver.
[0044]
The information storage device 13 is an external storage device that stores navigation programs and data, and is a recording medium such as a CD-ROM. The program includes a map drawing unit, a route search unit, a route guidance unit, a current position calculation unit, a destination setting operation control unit, and the like, and an application unit for performing a signal output process of the navigation, an OS unit, and the like. A program for performing processing such as search, display output control required for route guidance, a program for voice output control required for voice guidance and data required for the same, and display information required for route guidance and map display Data is stored. Further, the data includes satellite photograph data composed of raster data, map data necessary for route guidance composed of vector data (road map, housing map, building shape map, etc.), intersection data, node data, road data, photograph data, It consists of registered point data, destination point data, guide road data, detailed destination data, destination reading data, telephone number data, address data, and other data files, and stores all data necessary for the navigation device.
[0045]
The central processing unit 14 is a CPU for executing various arithmetic processes, and is for storing important information (for example, a program for executing route search and route guidance, data for setting conditions, data of various parameters, and the like) in a nonvolatile manner. A flash memory (for example, an electrically erasable electrically erasable and programmable ROM (EEPROM)) which is a rewritable ROM (rewritable nonvolatile storage means), a program for performing a program check and update process of the flash memory (program reading) Means), which is a non-volatile storage means, a memory point for registering information of an arbitrary point by a driver's operation, frequency information accumulated by a learning function, error correction information of various detection means, and the like, stored for each individual. Information Synchronic a readable and writable volatile memory means for storing the (volatile manner) RAM (SRAM e.g., temporarily stored information can be electrically held: Static RAM) and a. Furthermore, an image memory that stores image data used for screen display on a display, an image processor that extracts image data from an image memory based on a display output control signal from a CPU, performs image processing, and outputs the processed image to a display. A voice processor for synthesizing voices, phrases, a single sentence, sound, and the like read from the information storage device 13 based on a voice output control signal from the CPU, converting the synthesized voice into analog signals, and outputting the analog signals to a speaker; I have.
[0046]
The navigation program and data may be read from the outside via the information transmitting / receiving device 15, or may be a system that combines a vehicle map display device, a vehicle-mounted device for navigation, and an information center. You may. In this way, by reading the necessary navigation programs and data from the outside via the information transmitting / receiving device 15, the necessary programs can be obtained by using a recording medium such as a DVD instead of the CD-ROM for the information storage device 13. Alternatively, the latest data can be appropriately updated and stored, and the information storage device 13 can be omitted and stored directly in the flash memory or RAM of the central processing unit 14.
[0047]
Next, the operation will be described. In the navigation having the above configuration, when the program of the route guidance system is started by the CPU of the central processing unit 14, first, the current position is detected by the current position detection device 12, and a map around the current position is displayed around the current position. The destination is set using a telephone number, address, facility name, memory point, and the like. Then, a route search from the current position to the destination is performed. When the route is determined, the route guidance / display is repeated until the vehicle arrives at the destination while the current position is tracked by the current position detection device 12. When displaying a satellite photograph on the display screen of the present embodiment, semi-transparency processing is performed according to differences in environment such as time zone, season, driving situation, and weather.
[0048]
Note that the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-described embodiment, a configuration has been described in which the semi-transmissive processing is performed on the drawing memory on which the satellite photograph data is drawn. However, when the satellite photograph data is drawn on the drawing memory, a half-transfer process is performed for each pixel of the satellite photograph data. Data that has been subjected to arithmetic processing for transparency, combined with semi-transparent image data, or combined with operation icon images such as the current position mark or route for overwriting (combined (edited)). May be configured to draw on the drawing memory. That is, the editing processing may be executed by the drawing processing means.
[0049]
As described above, by changing the color tone of one raster format map data according to a difference in environment, a map that is easy for the user to see can be displayed in a short time.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a map display device according to the present invention.
FIG. 2 is a diagram for describing an example of drawing and display processing.
FIG. 3 is a diagram for explaining an example of processing when a daytime satellite photograph is converted to a nighttime image;
FIG. 4 is a diagram illustrating an example of another process when a day image satellite photograph is converted to a night image;
FIG. 5 is a diagram for explaining an example of processing when displaying a mark or a route on a satellite photograph.
FIG. 6 is a diagram for describing an example of processing for switching display using one layer.
FIG. 7 is a diagram for describing an example of processing for switching display using two layers.
FIG. 8 is a diagram illustrating a configuration example of a circuit that performs an editing process.
FIG. 9 is a diagram illustrating a configuration example of another circuit that performs an editing process.
FIG. 10 is a diagram showing an embodiment in which the map display device of the present embodiment is incorporated in a navigation device for a vehicle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Data storage medium, 2 ... Data decompression processing part, 3 ... Primary storage memory, 4 ... Drawing processing part, 5 ... Drawing memory, 6 ... Display control part, 7 ... Display, 8 ... Editing information holding part, 9 ... Editing Selection section

Claims (10)

Storage means for storing raster format map data;
An environmental change detecting means for detecting an environmental change;
Control means for changing a color tone of the raster format map data in accordance with a change in environment detected by the environment change detection means;
Display means for displaying map data changed by the control means. The map display device according to claim 1, wherein the map data is divided into a plurality of blocks, and the raster data obtained by dividing the blocks has position information of a representative point. The map display device according to claim 1, wherein the environment change detection unit detects an environment change based on GPS information. The map display device according to any one of claims 1 to 3, wherein the environment change detection unit determines day or night based on whether a vehicle light is on. The map display device according to any one of claims 1 to 4, wherein the environment change detection unit determines a current season based on GPS information. The map display device according to claim 1, wherein the control unit changes the RGB values of the map data based on predetermined color information and transmittance information. The storage unit further has vector map data and current position mark information, and the control unit overwrites the raster map data with the changed color tone with the vector map data of the guide route to the destination. The map display device according to claim 1. The map display device according to any one of claims 1 to 7, wherein the control means changes a color tone when drawing the raster format map data in a drawing memory. 9. The map display device according to claim 1, wherein said control means changes a color tone when outputting the raster format map data drawn in a drawing memory to said display means. A map display program for displaying a map based on raster data stored in storage means and a change in environment detected by environment change detection means,
Detecting a change in the environment by the environment change detection means;
Changing the color tone of the raster-format map data according to the change in the environment detected by the step of detecting a change in the environment;
Displaying the map data changed in the color tone changing step.

Images