CN102915310B - One map generalization method electronically, air navigation aid and device - Google Patents
One map generalization method electronically, air navigation aid and device Download PDFInfo
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- CN102915310B CN102915310B CN201110221057.0A CN201110221057A CN102915310B CN 102915310 B CN102915310 B CN 102915310B CN 201110221057 A CN201110221057 A CN 201110221057A CN 102915310 B CN102915310 B CN 102915310B
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Abstract
The invention discloses one map generalization method electronically, air navigation aid and device, each legend in the map picture that identification terminal gets, according to each legend in the map picture identified, identify each road sign dot image corresponding with each legend comprised in map picture; Determine the actual geographic position that each road sign dot image is corresponding; Then according to the actual geographic position of each road sign dot image of comprising in map picture and correspondence thereof, generate electronic chart, the embodiment of the present invention can also utilize the electronic chart of generation to navigate.The method that the embodiment of the present invention provides and device utilize terminal can get the situation of map picture easily at sight spot, electronic chart is generated according to the map picture got, then utilize electronic chart to realize navigation, for user provide a kind of simple, convenient, be easy to the Navigation and localization service that realizes.
Description
Technical field
The present invention relates to field of terminal technology, particularly relate to one map generalization method electronically, air navigation aid and device.
Background technology
At present, electronic chart is on mobile terminals browsed and navigation Service widespread use, but, current navigation Service mostly is traffic navigation, for the region that geographic range is less, such as certain concrete sight spot, can provide the software and services of walking navigation also fewer for sight spot tourist.And, existing for the mobile navigation at this concrete sight spot or the software and services spininess of Mobile Telephone Gps to public demand, the scenic spot road sign point that the scenic spot electronic chart provided marks generally only comprises the road sign point of instruction scenic area and scenic spot, lack the information that the such as food and drink, shop, toilet etc. of more details are very useful to tourist, map when cannot meet visit sight spot is checked or the demand for services such as walking navigation, and carrying out visit to user at sight spot makes troubles.
Summary of the invention
The embodiment of the present invention utilizes terminal conveniently can get the feature of map picture, provides a kind of convenient map generalization method electronically, air navigation aid and device realized.
The one map generalization method electronically that the embodiment of the present invention provides, comprising:
Identify each legend in the map picture that terminal gets;
According to each legend in the map picture identified, identify each road sign dot image corresponding with each legend comprised in map picture;
Determine the actual geographic position that each road sign dot image is corresponding;
According to the actual geographic position of each road sign dot image comprised in map picture identified and the correspondence determined thereof, generate electronic chart.
The embodiment of the present invention additionally provides a kind of air navigation aid, comprising:
Identify each legend in the map picture that terminal gets;
According to each legend in the map picture identified, identify each road sign dot image corresponding with each legend comprised in map picture;
Determine the actual geographic position that each road sign dot image is corresponding;
According to the actual geographic position of each road sign dot image comprised in map picture identified and the correspondence determined thereof, generate electronic chart;
Electronic chart according to generating navigates.
The embodiment of the present invention additionally provides a kind of generating apparatus of electronic chart, comprising:
Identification module, for identifying each legend in map picture that terminal gets, and according to each legend in the map picture identified, identifies each road sign dot image corresponding with each legend comprised in map picture;
Locating module, for determining the actual geographic position that each road sign dot image is corresponding;
Map generation module, for the actual geographic position according to each road sign dot image comprised in map picture identified and the correspondence determined thereof, generates electronic chart.
A kind of guider, is characterized in that, comprising:
Identification module, for identifying each legend in map picture that terminal gets, and according to each legend in the map picture identified, identifies each road sign dot image corresponding with each legend comprised in map picture;
Locating module, for determining the actual geographic position that each road sign dot image is corresponding;
Map generation module, for the actual geographic position according to each road sign dot image comprised in map picture identified and the correspondence determined thereof, generates electronic chart;
Navigation module, for navigating according to the electronic chart generated.
The beneficial effect of the embodiment of the present invention comprises:
One map generalization method electronically, air navigation aid and device that the embodiment of the present invention provides, each legend in the map picture that identification terminal gets, according to each legend in the map picture identified, identify each road sign dot image corresponding with each legend comprised in map picture; Determine the actual geographic position that each road sign dot image is corresponding; Then according to the actual geographic position of each road sign dot image of comprising in map picture and correspondence thereof, generate electronic chart, the embodiment of the present invention also can utilize the electronic chart of generation to navigate.The method that the embodiment of the present invention provides and device utilize terminal can get the situation of map picture easily at sight spot, electronic chart is generated according to the map picture got, then electronic chart is utilized to realize navigation, for user provides a kind of simple and convenient Navigation and localization service being easy to realize.
Accompanying drawing explanation
The process flow diagram of the map generalization method electronically that Fig. 1, Fig. 2 and Fig. 3 provide for the embodiment of the present invention;
The process flow diagram of the air navigation aid that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the generating apparatus of the electronic chart that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the guider that Fig. 6 provides for the embodiment of the present invention;
The schematic diagram of the scenic spot map panel that Fig. 7 provides for the embodiment of the present invention;
The structural representation of guider in the example that Fig. 8 provides for the embodiment of the present invention;
The process flow diagram of electronic chart is generated in the example that Fig. 9 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of map generalization method electronically, air navigation aid and device that the embodiment of the present invention provides is described in detail.
Browsing in smaller scope; browsing of such as scenic spot; usually have the scenic spot map picture utilizing mobile phone or other electronic tools just can easily get; such as scenic spot map panel etc.; these scenic spot map pictures generally contain to viewer very useful as information such as food and drink, shop, toilets; the embodiment of the present invention, just based on this, provides a kind of map generalization method electronically newly.
The one map generalization method electronically that the embodiment of the present invention provides, as shown in Figure 1, idiographic flow comprises:
S101, each legend identified in map picture that terminal gets, and according to each legend in the map picture identified, identify each road sign dot image corresponding with each legend comprised in map picture;
S102, determine the actual geographic position that each road sign dot image is corresponding;
S103, according to each road sign dot image comprised in map picture that identifies and the actual geographic position of correspondence determined thereof, generate electronic chart.
Wherein, the map picture of the use in step S101 can be obtained by the camera of terminal or bluetooth, such as can utilize the map picture in the camera shooting scenic spot map panel on mobile phone, or in the map panel of scenic spot, wireless launcher is installed, the blue-tooth device on mobile phone can be used directly to obtain map picture.
Further, if map picture is excessive or want the sharpness improving the map picture got, camera gradation can be used to take and preserve map picture each several part, and each map picture that gradation is taken is spliced into a chunk map picture, such as take separately the legend of scatter display in map picture and concrete map area.
In addition, image recognition technology of the prior art can be used in step S101, identify each legend in map picture and each road sign dot image corresponding with each legend, usually, legend all can have fixing significant feature, such as, represent that feature that the legend of toilet has is generally the image of men and women person of low position, uses these features as the standard pattern of pattern-recognition or template, just can identify the legend in map picture, detailed process does not repeat them here.
Particularly, in above-mentioned steps S102, determine the actual address position that each road sign dot image is corresponding, as shown in Figure 2, can be realized by following step:
S201, determine the actual geographic position that in map picture, each pixel is corresponding;
S202, for each road sign dot image, the pixel involved in map picture according to this road sign dot image, and the actual geographic position that involved pixel is corresponding, determine the actual geographic position that this road sign dot image is corresponding.
Wherein, after completing steps S201, the actual geographic position that each pixel in the map picture determined is corresponding can also be preserved, like this when the electronic chart that the method using the embodiment of the present invention to provide generates, electronic chart shows in real time to the current location at user place.
Particularly, in the said method that the embodiment of the present invention provides, in order to the actual geographic position determining that in map picture, each pixel is corresponding, said method can also comprise the following steps:
Identify the engineer's scale, directional information and the current location that comprise in map picture;
Preferably, after identifying the directional information comprised in map picture, the direct north that can also indicate according to directional information and the drift angle of actual direct north, map picture is corrected, increase the accuracy of the electronic chart generated, bearing calibration used herein is prior art, does not repeat them here.
Particularly, in above-mentioned steps S201, determine the actual geographic position that in map picture, each pixel is corresponding, as shown in Figure 3, following flow process can be comprised:
S301, according to engineer's scale and directional information, determine that the distance of m pixel in map picture corresponds to the distance of n longitude in actual geographic position or latitude;
S302, determine the coordinate (x of current location place pixel in map picture
0, y
0) corresponding actual geographic position (lat
0, long
0);
S303, based on actual geographic position (lat, long) corresponding to each pixel (x, y) in following formula determination map picture;
(lat,long)＝(lat
0+n×(x-x
0)/m,long
0+n×(y-y
0)/m)。
Wherein, the execution of above-mentioned steps S301 and S302 sequentially also can complete in no particular order simultaneously, is not specifically limited in embodiments of the present invention.
What prior art provided utilizes map picture generation electronic chart to carry out in the method for navigating, anchor point needs manually to be inputted by user, and require that user oneself judges anchor point location, and move to anchor point place and carry out satnav, the incidence relation of electronic chart and actual geographic position could be set up.Larger deviation may be there is in the anchor point chosen by user and actual geographic position on subjective and objective, thus the deviation causing the electronic chart of generation and actual geographic position to exist is larger, and in the embodiment of the present invention, (general user is when taking map picture as anchor point to utilize current location common in map picture, be sitting at the current position indicated in map picture), utilize the coordinate of current location in map picture and the corresponding relation of actual geographic position determined, and the engineer's scale information identified, the actual geographic position that in map picture, each pixel is corresponding can be determined, user is without oneself determining anchor point and carrying out satnav, avoid the possibility that there is deviation between the electronic chart generated and actual geographic position, in addition, also greatly simplify the operation of user, be user-friendly to.
Particularly, the coordinate (x of current location place pixel is determined in step s 302
0, y
0) corresponding actual geographic position (lat
0, long
0), can be realized by following flow process:
By the GPS location of terminal or actual geographic position (lat when being positioned at the current location of map picture instruction from network side acquisition terminal
0, long
0);
By the actual geographic position (lat of terminal oriented
0, long
0) be defined as the coordinate (x of current position image place pixel
0, y
0) corresponding actual geographic position (lat
0, long
0).
The embodiment of the present invention additionally provides a kind of air navigation aid, and this air navigation aid make use of the electronic chart generated in the map generalization method electronically that the embodiment of the present invention provides and navigates, and as shown in Figure 4, idiographic flow comprises:
S401, each legend identified in map picture that terminal gets, and according to each legend in the map picture identified, identify each road sign dot image corresponding with each legend comprised in map picture;
S402, determine the actual geographic position that each road sign dot image is corresponding;
S403, according to each road sign dot image comprised in map picture that identifies and the actual geographic position of correspondence determined thereof, generate electronic chart;
S404, according to generate electronic chart navigate.
Wherein, the concrete operations flow process of carrying out navigating according to electronic chart in step S404 is prior art, does not repeat them here.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of generating apparatus and guider of electronic chart, the principle of dealing with problems due to this device is similar with air navigation aid to aforementioned one map generalization method electronically, therefore the enforcement of this device see the enforcement of method, can repeat part and repeats no more.
The generating apparatus of a kind of electronic chart that the embodiment of the present invention provides, as shown in Figure 5, comprising:
Identification module 501, for identifying each legend in map picture that terminal gets, and according to each legend in the map picture identified, identifies each road sign dot image corresponding with each legend comprised in map picture;
Locating module 502, for determining the actual geographic position that each road sign dot image is corresponding;
Map generation module 503, for the actual geographic position according to each road sign dot image comprised in map picture identified and the correspondence determined thereof, generates electronic chart.
Preferably, the locating module 502 in the generating apparatus of the electronic chart that the embodiment of the present invention provides, as shown in Figure 5, specifically comprises:
First locator module 5021, for the actual geographic position determining that in map picture, each pixel is corresponding;
Second locator module 5022, for for each road sign dot image, the pixel involved in map picture according to this road sign dot image, and the actual geographic position that involved pixel is corresponding, determine the actual geographic position that this road sign dot image is corresponding.
Preferably, the identification module 501 in said apparatus, also for identifying the engineer's scale, directional information and the current location that comprise in map picture;
First locator module 5021, specifically for according to engineer's scale and directional information, determines that the distance of m pixel in map picture corresponds to the distance of n longitude in actual geographic position or latitude; Determine the coordinate (x of current location place pixel
0, y
0) corresponding actual geographic position (lat
0, long
0); Based on the actual geographic position (lat, long) that pixel (x, y) each in following formula determination map picture is corresponding; (lat, long)=(lat
0+ n × (x-x
0)/m, long
0+ n × (y-y
0)/m).
Preferably, the first locator module 5021 in said apparatus, actual geographic position (lat during specifically for being located by the GPS of terminal or being positioned at the current location of map picture instruction from network side acquisition terminal
0, long
0); By the actual geographic position (lat of terminal oriented
0, long
0) be defined as the coordinate (x of current position image place pixel
0, y
0) corresponding actual geographic position (lat
0, long
0).
Preferably, the generating apparatus of the electronic chart that the embodiment of the present invention provides, as shown in Figure 5, also comprise: correction module 504, for after identifying the directional information comprised in map picture, according to the direct north of directional information instruction and the drift angle of actual direct north, map picture is corrected.
Preferably, the identification module 501 in said apparatus, obtains map picture specifically for the camera or bluetooth passing through terminal.
A kind of guider that the embodiment of the present invention provides, as shown in Figure 6, comprising:
Identification module 601, for identifying each legend in map picture that terminal gets, and according to each legend in the map picture identified, identifies each road sign dot image corresponding with each legend comprised in map picture;
Locating module 602, for determining the actual geographic position that each road sign dot image is corresponding;
Map generation module 603, for the actual geographic position according to each road sign dot image comprised in map picture identified and the correspondence determined thereof, generates electronic chart;
Navigation module 604, for navigating according to the electronic chart generated.
Preferably, the generating apparatus of the above-mentioned electronic chart that the embodiment of the present invention provides and guider, can be arranged in existing mobile terminal, during specific implementation, can be realized by the mode of software and/or hardware.
The electronic chart generating scenic spot below by one particularly carries out the example waiting and apply that navigates, and explains map generalization method electronically, air navigation aid and device that the embodiment of the present invention provides.
Fig. 7 is the panel of whole scenic spot map, can see that scenic spot map is divided into following components substantially: directional information, map and legend (wherein, current location information generally uses round dot to represent).
In this example, whole guider, as shown in Figure 8, is divided into following module: map Acquire and process module 801, locating module 802, data memory module 803 and map application module 804 4 major part.
Wherein, map Acquire and process module 801, by means of the camera on mobile device, map picture in the scenic spot map panel photographed is through the step such as Digital Image Processing, text identification, extract the relevant information generated needed for electronic chart, such as current location, road information, directional information, map scale and interest point information (each sight spot, toilet, food and drink, shop etc.) etc.; Meanwhile, call positioning module, 802 position, so that the corresponding relation of the relevant information set up in map picture and actual geographic position.
Particularly, map Acquire and process module 801, comprising: Image Acquisition submodule 8011, text identification submodule 8012, image procossing submodule 8013 and generation map submodule 8014.
The actual geographic position of the multiple localization method that locating module 802 can use mobile device to provide to the current location place of extracting in map picture is determined, such as when GPS opens, GPS can be used to carry out hi-Fix, and when GPS does not open, network positions mode (namely obtaining the geographical location information at terminal place from network side) can be used to carry out low precision location.
Data memory module 803, is mainly used in storing the map picture, the relevant information extracted and its actual geographic positional information determined that are photographed by map Acquire and process module 801, and provides corresponding data when map application module 804 needs.
Map application module 804, is mainly used in providing the services such as the inquiry of map view, point of interest, walking navigation to user.Because required data were disposed in the generation electronic chart stage, so when using above-mentioned service, map application module 804 only need read corresponding data from data memory module 803.
Particularly, map application module 804 comprises: map view submodule 8041, POI (Point ofInterest, point of interest) searches for submodule 8042 and navigation submodule 8043.
Below the specific works flow process of above-mentioned guider generation electronic chart is described in detail, as shown in Figure 9:
S901, Image Acquisition submodule 8011 obtain map picture by the camera of terminal, and need in map picture to comprise directional information and engineer's scale information;
S902, Text region submodule 8012 and image procossing submodule 8013 identify directional information and engineer's scale information in the map picture got, and correct overall map picture according to sensing drift angle (drift angle of the direct north pointed in directional information and actual direct north);
S903, map generate submodule 8014, according to directional information and engineer's scale information, set up the engineer's scale conversion relation (namely calculating every m pixel respective distances in map picture is n lat/longitude) in map picture between pixel and actual geographic position;
S904, Image Acquisition submodule 8011 obtain by the camera of terminal the map picture comprising current location;
Current location in S905, Text region submodule 8012 and image procossing submodule 8013 pairs of map pictures identifies;
S906, locating module 802 locating terminal are positioned at the actual geographic position (lat during current location of map picture instruction
0, long
0);
S907, map generate the corresponding relation that submodule 8014 sets up each pixel and actual geographic position in map picture, namely for the pixel (x in map picture, y) actual geographic position (lat, the long)=(lat of its correspondence
0+ n × (x-x
0)/m, long
0+ n × (y-y
0)/m);
S908, Image Acquisition submodule 8011 obtain the legend information in map picture by terminal camera; One piece of situation about illustrating is concentrated on for multiple legend, takes one; For the situation of legend scatter display, obtain by the mode of taking successively;
S909, Text region submodule 8012 and image procossing submodule 8013 pairs of legends identify, identify each point of interest image corresponding with each legend;
S910, map generate the corresponding relation that submodule 8014 sets up each point of interest and actual geographic position in map picture;
The data obtained in step S901 ~ S910 store according to certain form by S911, data memory module 803.
In above-mentioned steps S901 ~ S911, be the corresponding relation first setting up each pixel and physical location, then identify each legend in map picture, also after step S903, first can carry out step S908 and S909, then carry out step S904 ~ S907.
Just can generate electronic chart by step S901 ~ S911, follow-up map application module 804 calls the electronic chart of generation, can realize the distance of specified point and current location or another specified point calculating or on electronic chart real-time depiction current location.In addition, terminal can also be positioned at the point of interest do not identified in map picture by other means, navigates.
One map generalization method electronically, air navigation aid and device that the embodiment of the present invention provides, each legend in the map picture that identification terminal gets, according to each legend in the map picture identified, identify each road sign dot image corresponding with each legend comprised in map picture; Determine the actual geographic position that each road sign dot image is corresponding; Then according to the actual geographic position of each road sign dot image of comprising in map picture and correspondence thereof, generate electronic chart, the embodiment of the present invention also can utilize the electronic chart of generation to navigate.The method that the embodiment of the present invention provides and device utilize terminal can get the situation of map picture easily at sight spot, electronic chart is generated according to the map picture got, then electronic chart is utilized to realize navigation, for user provides a kind of simple and convenient Navigation and localization service being easy to realize.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a map generalization method electronically, is characterized in that, comprising:
Identify each legend in the map picture that terminal gets;
According to each legend in the described map picture identified, identify each road sign dot image corresponding with each legend comprised in described map picture;
Determine the actual geographic position that described each road sign dot image is corresponding;
According to each road sign dot image comprised in described map picture identified, and the actual geographic position of the correspondence determined, generate electronic chart;
Wherein, determine specifically to comprise the actual geographic position that each road sign dot image is corresponding:
Determine the actual geographic position that in described map picture, each pixel is corresponding;
For each road sign dot image, the pixel involved in described map picture according to this road sign dot image, and the actual geographic position that involved pixel is corresponding, determine the actual geographic position that this road sign dot image is corresponding:
Particularly, determine the actual geographic position that in described map picture, each pixel is corresponding, specifically comprise:
According to the engineer's scale comprised in the described map picture identified and directional information, determine that the distance of m pixel in described map picture corresponds to the distance of n longitude in actual geographic position or latitude;
Determine the coordinate (x of the current location place pixel comprised in the described map picture identified
0, y
0) corresponding actual geographic position (lat
0, long
0);
The actual geographic position (lat, long) that in described map picture, each pixel (x, y) is corresponding is determined based on following formula;
(lat,long)＝(lat
0+n×(x-x
0)/m,long
0+n×(y-y
0)/m)；
Wherein, the coordinate (x of described current location place pixel is determined
0, y
0) corresponding actual geographic position (lat
0, long
0), specifically comprise:
Actual geographic position (lat when described terminal is positioned at the current location of described map picture instruction is obtained by the GPS of terminal location or from network side
0, long
0);
By the actual geographic position (lat of described terminal oriented
0, long
0) be defined as the coordinate (x of described current location place pixel
0, y
0) corresponding actual geographic position (lat
0, long
0).
2. the method for claim 1, is characterized in that, after identifying the directional information comprised in described map picture, also comprises:
The drift angle of the direct north indicated according to described directional information and actual direct north, corrects described map picture.
3. the method as described in any one of claim 1-2, is characterized in that, obtains described map picture by the camera of terminal or bluetooth.
4. an air navigation aid, is characterized in that, comprising:
Identify each legend in the map picture that terminal gets;
According to each legend in the described map picture identified, identify each road sign dot image corresponding with each legend comprised in described map picture;
Determine the actual geographic position that described each road sign dot image is corresponding;
According to each road sign dot image comprised in described map picture identified, and the actual geographic position of the correspondence determined, generate electronic chart;
Described electronic chart according to generating navigates;
Wherein, determine specifically to comprise the actual geographic position that each road sign dot image is corresponding:
Determine the actual geographic position that in described map picture, each pixel is corresponding;
For each road sign dot image, the pixel involved in described map picture according to this road sign dot image, and the actual geographic position that involved pixel is corresponding, determine the actual geographic position that this road sign dot image is corresponding:
Particularly, determine the actual geographic position that in described map picture, each pixel is corresponding, specifically comprise:
According to the engineer's scale comprised in the described map picture identified and directional information, determine that the distance of m pixel in described map picture corresponds to the distance of n longitude in actual geographic position or latitude;
Determine the coordinate (x of the current location place pixel comprised in the described map picture identified
0, y
0) corresponding actual geographic position (lat
0, long
0);
The actual geographic position (lat, long) that in described map picture, each pixel (x, y) is corresponding is determined based on following formula;
(lat,long)＝(lat
0+n×(x-x
0)/m,long
0+n×(y-y
0)/m)；
Wherein, the coordinate (x of described current location place pixel is determined
0, y
0) corresponding actual geographic position (lat
0, long
0), specifically comprise:
Actual geographic position (lat when described terminal is positioned at the current location of described map picture instruction is obtained by the GPS of terminal location or from network side
0, long
0);
By the actual geographic position (lat of described terminal oriented
0, long
0) be defined as the coordinate (x of described current location place pixel
0, y
0) corresponding actual geographic position (lat
0, long
0).
5. a generating apparatus for electronic chart, is characterized in that, comprising:
Identification module, for identifying each legend in map picture that terminal gets, and according to each legend in the described map picture identified, identifies each road sign dot image corresponding with each legend comprised in described map picture;
Locating module, for determining the actual geographic position that described each road sign dot image is corresponding;
Map generation module, for the actual geographic position according to each road sign dot image comprised in described map picture identified and the correspondence determined thereof, generates electronic chart;
Wherein, described locating module, specifically comprises:
First locator module, for the actual geographic position determining that in described map picture, each pixel is corresponding;
Second locator module, for for each road sign dot image, the pixel involved in described map picture according to this road sign dot image, and the actual geographic position that involved pixel is corresponding, determine the actual geographic position that this road sign dot image is corresponding;
Described identification module, also for identifying the engineer's scale, directional information and the current location that comprise in described map picture;
Described first locator module, specifically for according to described engineer's scale and described directional information, determines that the distance of m pixel in described map picture corresponds to the distance of n longitude in actual geographic position or latitude; Determine the coordinate (x of described current location place pixel
0, y
0) corresponding actual geographic position (lat
0, long
0); The actual geographic position (lat, long) that in described map picture, each pixel (x, y) is corresponding is determined based on following formula; (lat, long)=(lat
0+ n × (x-x
0)/m, long
0+ n × (y-y
0)/m);
Described first locator module, specifically for obtaining actual geographic position (lat when described terminal is positioned at the current location of described map picture instruction by the GPS of terminal location or from network side
0, long
0); By the actual geographic position (lat of described terminal oriented
0, long
0) be defined as the coordinate (x of described current position image place pixel
0, y
0) corresponding actual geographic position (lat
0, long
0).
6. device as claimed in claim 5, it is characterized in that, also comprise correction module, for after identifying the directional information comprised in described map picture, the drift angle of the direct north indicated according to described directional information and actual direct north, corrects described map picture.
7. the device as described in any one of claim 5-6, is characterized in that, described identification module, specifically for obtaining described map picture by the camera of terminal or bluetooth.
8. a guider, is characterized in that, comprising:
Identification module, for identifying each legend in map picture that terminal gets, and according to each legend in the described map picture identified, identifies each road sign dot image corresponding with each legend comprised in described map picture;
Locating module, for determining the actual geographic position that described each road sign dot image is corresponding;
Map generation module, for the actual geographic position according to each road sign dot image comprised in described map picture identified and the correspondence determined thereof, generates electronic chart;
Navigation module, for navigating according to the described electronic chart generated;
Wherein, described locating module, specifically comprises:
First locator module, for the actual geographic position determining that in described map picture, each pixel is corresponding;
Second locator module, for for each road sign dot image, the pixel involved in described map picture according to this road sign dot image, and the actual geographic position that involved pixel is corresponding, determine the actual geographic position that this road sign dot image is corresponding;
Described identification module, also for identifying the engineer's scale, directional information and the current location that comprise in described map picture;
Described first locator module, specifically for according to described engineer's scale and described directional information, determines that the distance of m pixel in described map picture corresponds to the distance of n longitude in actual geographic position or latitude; Determine the coordinate (x of described current location place pixel
0, y
0) corresponding actual geographic position (lat
0, long
0); The actual geographic position (lat, long) that in described map picture, each pixel (x, y) is corresponding is determined based on following formula; (lat, long)=(lat
0+ n × (x-x
0)/m, long
0+ n × (y-y
0)/m);
Described first locator module, specifically for obtaining actual geographic position (lat when described terminal is positioned at the current location of described map picture instruction by the GPS of terminal location or from network side
0, long
0); By the actual geographic position (lat of described terminal oriented
0, long
0) be defined as the coordinate (x of described current position image place pixel
0, y
0) corresponding actual geographic position (lat
0, long
0).
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|---|---|---|---|
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