{
    "info": {

        // Required
        "format_version": "1.5",
        
        // All other "info" fields are optional
        "detector": "md_v4.1.0.pb",
        "detection_completion_time": "2019-05-22 02:12:19",
        "classifier": "ecosystem1_v2",
        "classification_completion_time": "2019-05-26 01:52:08",
        "detector_metadata": {
           "megadetector_version":"v4.1.0",
           // These fields make recommendations to downstream tools about 
           // reasonable default confidence thresholds.
           "typical_detection_threshold":0.8,
           "conservative_detection_threshold":0.6
        },
        "classifier_metadata": {
           "typical_classification_threshold":0.75
        },
        "summary_report": "<p>Summary report</p><br/><p>...in which HTML is allowed.</p>"
    },
    // detection_categories is required; category IDs must be non-negative string-formatted ints.
    //
    // Category IDs are not required to be contiguous.
    //
    // Category names can be arbitrary, but downstream tools may take a particular dependency 
    // on the name "animal", so using "animal" (rather than, e.g., "animals" or "wildlife")
    // is recommended.  Use of the category ID "0" is discouraged, as this is informally reserved
    // for an "empty" category.  Detection category names don't have to be unique.
    "detection_categories": {
        "1": "animal",
        "2": "person",
        "3": "vehicle"
    },
    // classification_categories is optional; if present, category IDs must be 
    // non-negative string-formatted ints.  Category IDs are not required to be contiguous.
	// Classification category names don't have to be unique.	
    "classification_categories": {
        "0": "fox",
        "1": "elk",
        "2": "wolf",
        "3": "bear",
        "4": "moose"
    },
    // classification_category_descriptions is optional; if present, category IDs must be 
    // string-formatted ints, and must be the same set of IDs used in 
    // "classification_categories".
    //
    // This is typically used to provide searchable taxonomic names for categories.
    "classification_category_descriptions": {
        "0": "animalia;chordata;mammalia;carnivora;canidae;vulpesvulpes",
        "1": "animalia;chordata;mammalia;artiodactyla;cervidae;cervuscanadensis",
        "2": "animalia;chordata;mammalia;carnivora;canidae;canislupus",
        "3": "animalia;chordata;mammalia;carnivora;ursidae;ursusamericanus",
        "4": "animalia;chordata;mammalia;artiodactyla;cervidae;alcesalces"     
    },
    // The "images" array is required, but can be empty.
    "images": [
        {
            // Paths are typically relative paths, but absolute paths
            // are valid as well.  Forward slashes are preferred,
            // regardless of OS, but backslashes are valid as well.
            "file": "path/from/base/dir/image_with_animal.jpg",
            // "detections" should be present for any image that was 
            // successfully processed.  I.e., a lack of detections
            // should be communicated with an empty "detections" array,
            // not by omitting the "detections" field.
            "detections": [
                {
                    "category": "1",
                    "conf": 0.926,
                    // See below for more details on bounding box format
                    "bbox": [0.0, 0.2762, 0.1539, 0.2825], 
                    "classifications": [
                        ["3", 0.901],
                        ["1", 0.071],
                        ["4", 0.025]
                    ]
                },
                {
                    "category": "1",
                    "conf": 0.061,
                    "bbox": [0.0451, 0.1849, 0.3642, 0.4636]
                }
            ]
        },
        // Videos appear in the same format as images, with the addition of the
        // "frame_rate" and "frames_processed" fields (for the file), and the 
        // "frame_number" field (for each detection).  All three of these fields
        // are required for videos.
        //
        // frame_rate should be greater than zero, and can be int- or float-valued.  
        //
        // frame_number should be int-valued, and greater than or equal to zero.
        //
        // frames_processed should be a list of ints.
        //
        // Detections are typically included for just one representative
        // frame for each detection category, but detections may also be reported for
        // multiple frames for a single detection category, as in this example.
        {
            "file": "path/from/base/dir/video_with_person.mp4",
            "frame_rate": 20,
            "frames_processed" : [0, 20, 40, 60],
            "detections": [
                {
                    "category": "2",
                    "conf": 0.871,
                    "bbox": [0.1, 0.2, 0.3, 0.4],
                    "frame_number": 0
                },
                {
                    "category": "2",
                    "conf": 0.774,
                    "bbox": [0.11, 0.21, 0.31, 0.41],
                    "frame_number": 20
                }                               
            ]
        },         
        {
            // This file was processed correctly, but had no detections
            "file": "/path/from/base/dir/empty_image.jpg",
            "detections": []
        },
        {
            "file": "/path/from/base/dir/another_image.jpg",
            "detections": [],
            // The "failure" field is optional; for successfully-processed images, it can be 
            // omitted  or can be null.  This file was processed correctly.
            "failure": null        
        },
        {
            // This file was not processed.  "failure" should be a string in this case, indicating 
            // the reason for failure.  "detections" can be null or omitted in this case; it should *not*
            // be an empty list.
            "file": "/path/from/base/dir2/corrupted_image_0.jpg",
            "failure": "Failure image access",
            "detections": null
        }
    ]
}