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  • Batch

  • Images

  • Cutouts

Batches

blob_home and data_root - storage location information

batch_id - unique batch identifier

upload_datetime - when image were uploaded to “uploads” blob storage

image_list - list of images contained in a single batch folder

schema_version - version of data schema used for organizing metadata

{
    "blob_home": "data",
    "data_root": "semifield-developed-images",
    "batch_id": "NC_2022-08-05",
    "upload_datetime": "2022-08-19_21:28:37",
    "image_list": [
        "images/NC_1659710908.jpg",
        "images/NC_1659711200.jpg",
        "images/NC_1659706234.jpg",
        ...
        "images/NC_1659709264.jpg",
        "images/NC_1659715086.jpg",
        "images/NC_1659706245.jpg"
        ],
    "schema_version": "1.0"
}

Images - general

blob_home and data_root - storage location information

batch_id - unique batch identifier

image_id - unique image id comprised of state abbreviation and UNIX timestamp

image_path - Image filename with a single parent directory

plant_date - plant date for entire batch. Does not account for replantings.

growth_stage - estimated growth stage based on planting date

width and height - image height and width in pixels. May be downscaled as a result of autosfm; however, image in the “images”directory are full sized images. See fullres_width and fullres_height

exif_meta

camera_info

cutout_ids

bboxes

fullres_height

fullres_width

fullres_width

{
    "blob_home": "data",
    "data_root": "semifield-developed-images",
    "batch_id": "NC_2022-07-27",
    "image_id": "NC_1658926241",
    "image_path": "images/NC_1658926241.jpg",
    "plant_date": "2022-06-09",
    "growth_stage": "vegetative",
    "width": 4780,
    "height": 3184,
    
    "exif_meta": { ... },
    
    "camera_info": { ... },
    
    "cutout_ids": [ ... ],
    
    "bboxes": [ ... ],
    

    "fullres_height": 6368,
    "fullres_width": 9560,
    "schema_version": "1.0"
}


Images - Exif

Uses Exif-Py

pip install exifread

Technical tag information can be found here

    "exif_meta": {
        "ImageWidth": 9560,
        "ImageLength": 6368,
        "BitsPerSample": 8,
        "Compression": 1,
        "PhotometricInterpretation": 2,
        "Make": "SONY",
        "Model": "ILCE-7RM4",
        "Orientation": 1,
        "SamplesPerPixel": 3,
        "XResolution": "300",
        "YResolution": "300",
        "PlanarConfiguration": 1,
        "ResolutionUnit": 2,
        "Software": "RawTherapee 5.8",
        "DateTime": "2022:07:27 08:49:15",
        "Rating": 0,
        "ExifOffset": 4449,
        "ExposureTime": "1/200",
        "FNumber": "10",
        "ExposureProgram": 1,
        "ISOSpeedRatings": 100,
        "RecommendedExposureIndex": 100,
        "ExifVersion": [
            48,
            50,
            51,
            49
        ],
        "DateTimeOriginal": "2022:07:27 08:49:15",
        "DateTimeDigitized": "2022:07:27 08:49:15",
        "BrightnessValue": "9207/1280",
        "ExposureBiasValue": "0",
        "MaxApertureValue": "217/128",
        "MeteringMode": 5,
        "LightSource": 0,
        "Flash": 16,
        "FocalLength": "55",
        "FileSource": 3,
        "SceneType": 1,
        "CustomRendered": 0,
        "ExposureMode": 1,
        "WhiteBalance": 0,
        "DigitalZoomRatio": "1",
        "FocalLengthIn35mmFilm": 55,
        "SceneCaptureType": 0,
        "Contrast": 0,
        "Saturation": 0,
        "Sharpness": 0,
        "LensSpecification": [
            "55",
            "55",
            "9/5",
            "9/5"
        ],
        "LensModel": "FE 55mm F1.8 ZA",
        "BodySerialNumber": null,
        "MakerNote": null,
        "ImageDescription": " ",
        "UserComment": null,
        "ApplicationNotes": null,
        "Tag": null,
        "SubIFDs": 4450
    }

Images - Camera Info

camera_info

camera_location

pixel_width & pixel_height

yaw, pitch, roll

focal_length

fov

is_scaleable

"camera_info": {
        "camera_location": [
            -0.1992725638544925,
            9.926811159768054,
            2.130928709515993
        ],
        "pixel_width": 0.0075333198937023,
        "pixel_height": 0.0075333198937023,
        "yaw": 183.89777711639093,
        "pitch": -2.3366362127596525,
        "roll": 0.7135915032770658,
        "focal_length": 8747.80961719926,
        "fov": {
            "top_left": [
                -0.8064812117393512,
                10.27414293412319
            ],
            "top_right": [
                0.3552128560424488,
                10.353294011316107
            ],
            "bottom_left": [
                -0.7537579837514339,
                9.50032830822
            ],
            "bottom_right": [
                0.4079360840303661,
                9.579479385412917
            ],
            "is_scaleable": true
        }
    }

Images - Cutouts

cutout_ids

"cutout_ids": [
        "NC_1658926241_0",
        "NC_1658926241_1",
        "NC_1658926241_2",
        "NC_1658926241_3"
    ],

Images - Bounding Boxes

"bboxes": [
        {
            "bbox_id": "NC_1658926241_0",
            "image_id": "NC_1658926241",
            "local_centroid": [
                0.7247684299945831,
                0.782112181186676
            ],
            "local_coordinates": {
                "top_left": [
                    4559.100573062897,
                    3592.980739593506
                ],
                "top_right": [
                    9298.47180843353,
                    3592.980739593506
                ],
                "bottom_left": [
                    4559.100573062897,
                    6368.0
                ],
                "bottom_right": [
                    9298.47180843353,
                    6368.0
                ],
                "is_scaleable": true
            },
            "global_centroid": [
                -0.3805987383493097,
                10.21634506227248
            ],
            "global_coordinates": {
                "top_left": [
                    -0.1245738268094071,
                    10.015139374543459
                ],
                "top_right": [
                    -0.7303918468219674,
                    10.11728321515172
                ],
                "bottom_left": [
                    -0.07889030276824338,
                    10.4175507500015
                ],
                "bottom_right": [
                    -0.682307173930376,
                    10.458062046757698
                ],
                "is_scaleable": true
            },
            "cls": {
                "scientific_name": "Amaranthus palmeri",
                "common_name": "Palmer amaranth",
                "USDA_symbol": "AMPA",
                "EPPO": "AMAPA",
                "authority": "Watson",
                "collection_location": "NC",
                "polygon_id": ""
            },
            "is_primary": false,
            "overlapping_bbox_ids": []
        },
      
        {
            ...
        }
        
    ],

Cutouts

{
    "blob_home": "data",
    "data_root": "semifield-cutouts",
    "batch_id": "NC_2022-08-05",
    "image_id": "NC_1659703400",
    "cutout_id": "NC_1659703400_0",
    "cutout_path": "NC_2022-08-05/NC_1659703400_0.png",
    "cls": {
        "scientific_name": "Amaranthus palmeri",
        "common_name": "Palmer amaranth",
        "USDA_symbol": "AMPA",
        "EPPO": "AMAPA",
        "authority": "Watson",
        "collection_location": "NC",
        "polygon_id": ""
    },
    "cutout_num": 0,
    "is_primary": false,
    "datetime": "2022:08:05 08:41:41",
    "cutout_props": {
        "area": 28153.0,
        "area_bbox": 95480.0,
        "area_convex": 50539.0,
        "axis_major_length": 248.60737102397786,
        "axis_minor_length": 212.34307812840584,
        "centroid0": 156.52289276453664,
        "centroid1": 184.76936738535858,
        "eccentricity": 0.5200591323747853,
        "solidity": 0.5570549476641802,
        "perimeter": 1873.559666716433,
        "is_green": true,
        "green_sum": 17637
    },
    "extends_border": true,
    "cutout_version": "1.0",
    "schema_version": "1.0"
}

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