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This schema defines the structure for metadata related to images captured in a semifield environment. Each image is accompanied by detailed metadata for exif information, camera settings, annotations, and categorical classifications.<schema can go here as a drop down>

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titleSemifield-developed Metadata Schema
Code Block
languagejson
{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "properties": {
        "season": { "type": "string" },
        "datetime": { "type": "string" },
        "bbot_version": { "type": "string" },
        "batch_id": { "type": "string" },
        "image_id": { "type": "string" },
        "validated": { "type": "boolean" },
        "version": { "type": "string" },
        "exif_meta": {
            "type": "object",
            "properties": {
                "ImageWidth": { "type": "integer" },
                "ImageLength": { "type": "integer" },
                "Make": { "type": "string" },
                "Model": { "type": "string" },
                "Software": { "type": "string" },
                "DateTime": { "type": "string", "format": "date-time" },
                "ExposureTime": { "type": "string" },
                "FNumber": { "type": "string" },
                "ExposureProgram": { "type": "integer" },
                "ISOSpeedRatings": { "type": "integer" },
                "RecommendedExposureIndex": { "type": "integer" },
                "ExifVersion": {
                    "type": "array",
                    "items": { "type": "integer" }
                },
                "BrightnessValue": { "type": "string" },
                "MaxApertureValue": { "type": "string" },
                "LightSource": { "type": "integer" },
                "Flash": { "type": "integer" },
                "FocalLength": { "type": "string" },
                "ExposureMode": { "type": "integer" },
                "WhiteBalance": { "type": "integer" },
                "FocalLengthIn35mmFilm": { "type": "integer" },
                "Contrast": { "type": "integer" },
                "Saturation": { "type": "integer" },
                "Sharpness": { "type": "integer" },
                "LensModel": { "type": "string" },
                "LensSpecification": {
                    "type": "array",
                    "items": { "type": "string" }
                },
                "BodySerialNumber": { "type": ["string", "null"] }
            },
            "required": [
                "ImageWidth", 
                "ImageLength", 
                "Make", 
                "Model", 
                "Software", 
                "DateTime", 
                "ExposureTime", 
                "FNumber", 
                "ExposureProgram", 
                "ISOSpeedRatings", 
                "RecommendedExposureIndex", 
                "ExifVersion", 
                "BrightnessValue", 
                "MaxApertureValue", 
                "LightSource", 
                "Flash", 
                "FocalLength", 
                "ExposureMode", 
                "WhiteBalance", 
                "FocalLengthIn35mmFilm", 
                "Contrast", 
                "Saturation", 
                "Sharpness", 
                "LensModel", 
                "LensSpecification", 
                "BodySerialNumber"
            ]
        },
        "camera_info": {
            "type": "object",
            "properties": {
                "aligned": { "type": "boolean" },
                "estimated_xyz": { "type": "array", "items": { "type": "number" } },
                "estimated_pitch": { "type": "number" },
                "estimated_yaw": { "type": "number" },
                "estimated_roll": { "type": "number" },
                "pixel_width": { "type": "number" },
                "pixel_height": { "type": "number" },
                "camera_coefficients": {
                    "type": "object",
                    "properties": {
                        "f": { "type": "number" },
                        "cx": { "type": "number" },
                        "cy": { "type": "number" },
                        "b1": { "type": "number" },
                        "b2": { "type": "number" },
                        "k1": { "type": "number" },
                        "k2": { "type": "number" },
                        "k3": { "type": "number" },
                        "k4": { "type": "number" },
                        "p1": { "type": "number" },
                        "p2": { "type": "number" }
                    },
                    "required": [
                        "f",
                        "cx",
                        "cy",
                        "b1",
                        "b2",
                        "k1",
                        "k2",
                        "k3",
                        "k4",
                        "p1",
                        "p2"
                    ]
                
                },
                "fov": {
                    "type": "object",
                    "properties": {
                        "height": { "type": "number" },
                        "width": { "type": "number" },
                        "top_left_xy": { "type": "array", "items": { "type": "number" } },
                        "top_right_xy": { "type": "array", "items": { "type": "number" } },
                        "bottom_left_xy": { "type": "array", "items": { "type": "number" } },
                        "bottom_right_xy": { "type": "array", "items": { "type": "number" } },
                        "fov_area_cm2": { "type": "number" }
                    },
                    "required": [
                        "height",
                        "width",
                        "top_left_xy",
                        "top_right_xy",
                        "bottom_left_xy",
                        "bottom_right_xy",
                        "fov_area_cm2"
                        
                    ]
                }
            },
            "required": [
                "aligned",
                "estimated_xyz",
                "estimated_pitch",
                "estimated_yaw",
                "estimated_roll",
                "pixel_width",
                "pixel_height",
                "fov",
                "camera_coefficients"
            ]
        },
        "annotations": {
            "type": "array",
            "items": {
                "type": "object",
                "properties": {
                    "is_primary": { "type": "boolean" },
                    "cutout_exists": { "type": "boolean" },
                    "bbox_xywh": {
                        "type": "array",
                        "items": { "type": "integer" },
                        "minItems": 4,
                        "maxItems": 4
                    },
                    "category_class_id": { "type": "integer" },
                    "cutout_id": { "type": "string" },
                    "overlapping_cutout_ids": {
                        "type": "array",
                        "items": { "type": "string" }
                    },
                    "non_target_weed": { "type": "boolean" },
                    "non_target_weed_pred_conf": { "type": "number" }
                },
                "required": [
                    "is_primary", 
                    "cutout_exists",
                    "bbox_xywh", 
                    "category_class_id", 
                    "cutout_id",
                    "overlapping_cutout_ids",
                    "non_target_weed",
                    "non_target_weed_pred_conf"
                ]
            }
        },
        "categories": {
            "type": "array",
            "items": {
                "type": "object",
                "properties": {
                    "class_id": { "type": "integer" },
                    "USDA_symbol": { "type": "string" },
                    "EPPO": { "type": "string" },
                    "group": { "type": "string" },
                    "class": { "type": "string" },
                    "subclass": { "type": "string" },
                    "order": { "type": "string" },
                    "family": { "type": "string" },
                    "genus": { "type": "string" },
                    "species": { "type": "string" },
                    "common_name": { "type": "string" },
                    "authority": { "type": "string" },
                    "growth_habit": { "type": "string" },
                    "duration": { "type": "string" },
                    "category": { "type": "string" },
                    "multi_species_USDA_symbol": { "type": ["array", "null"], "items": { "type": "string" }, "minItems": 0 },
                    "link": { "type": ["string", "null"] },
                    "note": { "type": ["string", "null"] },
                    "rgb": { "type": "array", "items": { "type": "integer" }, "minItems": 3, "maxItems": 3},
                    "hex": { "type": "string" }
                },
                "required": [
                    "class_id", 
                    "USDA_symbol", 
                    "EPPO", 
                    "group", 
                    "class", 
                    "subclass", 
                    "order", 
                    "family", 
                    "genus",
                    "species", 
                    "common_name", 
                    "authority", 
                    "growth_habit", 
                    "duration", 
                    "category", 
                    "multi_species_USDA_symbol", 
                    "link", 
                    "note", 
                    "rgb",
                    "hex"
                ]
            }
        }
    },
    "required": [
        "season",
        "datetime",
        "bbot_version",
        "batch_id", 
        "image_id",
        "validated",
        "version",
        "exif_meta", 
        "camera_info", 
        "annotations", 
        "categories"
    ]
}

3.1 Properties Table

This README provides a detailed explanation of the metadata properties used in the Semifield-developed-image and Semifield-cutouts schemas. Each schema is designed to capture essential metadata for image processing, categorization, and analysis in agricultural and machine learning applications.

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