Can you GPS a photo? Don’t send pictures easily in the future…

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preface

In recent work, I encountered some scenes of image processing, mainly extracting some image width, resolution, physical focal length and other information in batch. Then you can see that the pictures contain a lot of other useful information as you use them. This article will share this tip with you.

code

Let’s break it down into a few steps and look at the code implementation.

• Analysis of images

First, introduce a JAR package

 <dependency>
     <groupId>com.drewnoakes</groupId>
     <artifactId>metadata-extractor</artifactId>
     <version>2.16.0</version>
 </dependency>
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Then write a method to get the details of the picture, including when the photo was taken, location information, phone model, and so on.

// Analyze the image to get the address
public static  Map<String,String> PicAnalysis(String path) throws JpegProcessingException, 		IOException {
    Map<String,String> map = new HashMap();
    System.out.println("Powerful language is recognizing picture address...");
    File picFile = new File(path);
    Metadata metadata = JpegMetadataReader.readMetadata(picFile);
    Iterator<Directory> it = metadata.getDirectories().iterator();
    while (it.hasNext()) {
        Directory exif = it.next();
        Iterator<Tag> tags = exif.getTags().iterator();
        while (tags.hasNext()) {
            Tag tag = tags.next();
            map.put(tag.getTagName(),tag.getDescription());
            System.out.println(tag.getTagName() + ":" +tag.getDescription());
        }
    }
    System.out.println("Picture analysis done!");
    return map;
}
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This method returns the following information, quite a bit, which is tabulated here:

• Convert to coordinates

The information taken from the picture is in degree minute second format: i.e. 30° 14′ 32.52″, we need to convert it to longitude and latitude: e.g. 121.485559,31.240778, code as follows:

public static String translate(String Gps) {
    String a = Gps.split("°") [0].replace(""."");
    String b = Gps.split("°") [1].split("'") [0].replace(""."");
    String c = Gps.split("°") [1].split("'") [1].replace(""."").replace("\" "."");
    double gps = Double.parseDouble(a)+Double.parseDouble(b)/60 + Double.parseDouble(c)/60/60;
    return String.valueOf(gps);
}
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• Unveiling the final veil

After obtaining the specific coordinates, which is only half a step away from success, the next step is to call the Amap Api to obtain the specific address.

 public static void getAddress( Map<String,String> param){
        String str = RequestUtils.sendGet("https://restapi.amap.com/v3/geocode/regeo"."key=5a3c45fd68d04bbc&location="+translate(param.get("GPS Longitude")) +","+translate(param.get("GPS Latitude")));
        JSONObject result = JSON.parseObject(str);
        System.out.println("Time of shooting:" +param.get("Date/Time"));
        System.out.println("Location:" +result.getJSONObject("regeocode").getString("formatted_address"));
        System.out.println("Phone model:" +param.get("Make") +"" + param.get("Model"));
        System.out.println(str);
    }
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However, we need to enter the Developer platform of Amap first, and those who do not apply for individual developer status need to apply first. The application procedure is relatively simple. After application, there will be a specified number of free calls every day, which is enough for personal use.

Lazy people play

If you think it is too troublesome and don’t want to apply for developer, ah, just play, just don’t want to apply, then spend Gie also has manual version.

• Manually convert latitude and longitude

Open the website www.minigps.net/fc.html, you can convert degrees into longitude and latitude online.

• Manual positioning coordinates

Open the pick coordinate system, input the latitude and longitude obtained in the previous step, you can view the specific address

Git address

You can upload your project to Git at github.com/zsh57753173…

The last

Finally clarify, two dogs so far single, which have what bad mind, and how can there be a girlfriend, this story is purely fictional, if there are similar, EMmm….. See you later.

Pay attention to avoid getting lost

That’s all for this episode. If you have any mistakes, please leave a comment. Thank you very much. I’m Flower Gie, feel free to leave a comment if you have any questions, and we’ll see you next time at 🦮.

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