Sensor Size, Camera Intrinsics matrix for all Parrot Models

mwk · March 21, 2023, 9:30pm

Greetings,

I’m a developer for some free and open source software called OpenAthena, which allows common drones to spot precise geodetic locations on earth using just pictures and their metadata:
tap_to_locate_demo_small

The Android app lets a user simply tap on any point in an image to geo-locate it by calculating ray angles and casting against a digital elevation model which stores altitude of terrain.

For this calculation to be accurate, it requires the physical size of the CMOS sensor and the maximum 4:3 image resolution for each model drone. I’ve been able to find this information, related to common “camera intrinsics”, for DJI, Autel, and Skydio drones, but haven’t been able to find satisfactory information for Parrot models:

github.com

mkrupczak3/OpenAthenaAndroid/blob/96f0d557b37b2ce48de449b44d7fa19635817712/app/src/main/java/com/openathena/MetadataExtractor.java#L196

      
        
                    autelMap.put("XT709", new double[]{6.40d/8000.0d, 4.80d/6000.0d, 8000.0d, 6000.0d});
            
            
        //   ____                              __
                    // /\  _`\                           /\ \__
                    // \ \ \L\ \ __     _ __   _ __   ___\ \ ,_\
                    //  \ \ ,__/'__`\  /\`'__\/\`'__\/ __`\ \ \/
                    //   \ \ \/\ \L\.\_\ \ \/ \ \ \//\ \L\ \ \ \_
                    //    \ \_\ \__/.\_\\ \_\  \ \_\\ \____/\ \__\
                    //     \/_/\/__/\/_/ \/_/   \/_/ \/___/  \/__/
            
            
        // TODO values are not satisfactory :(
            //        parrotMap.put("ANAFI", new double[]{5.90d/5344.0d, 4.43d/4016.0d, 5344.0d, 4016.0d});
            //
            //        parrotMap.put("ANAFIUSA", parrotMap.get("ANAFI"));
            //        parrotMap.put("ANAFI USA", parrotMap.get("ANAFI"));
            //        parrotMap.put("ANAFI-USA", parrotMap.get("ANAFI"));
            //        parrotMap.put("ANAFI_USA", parrotMap.get("ANAFI"));
            //
            //        parrotMap.put("ANAFIAI", new double[]{6.40d/8000.0d, 4.80d/6000.0d, 8000.0d, 6000.0d});
            //        parrotMap.put("ANAFI AI", parrotMap.get("ANAFIAI"));
            //        parrotMap.put("ANAFI-AI", parrotMap.get("ANAFIAI"));

If I could get a list of Parrot’s products, their camera EXIF model tag, and their CMOS sensor width and height, this would go a long way to help Parrot’s customers with a variety of use cases for the free software.

-Matthew Krupczak

system · April 20, 2023, 9:30pm

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