/** Convert Float32Array descriptor to number[] for JSON/DB storage */
export declare function descriptorToArray(descriptor: Float32Array): number[];
/** Convert number[] back to Float32Array for comparison */
export declare function arrayToDescriptor(arr: number[]): Float32Array;
/** Validate that a descriptor is valid (128 elements) */
export declare function isValidDescriptor(data: unknown): boolean;
/**
 * Draw a detection bounding box + score on a canvas overlay.
 */
export declare function drawDetection(canvas: HTMLCanvasElement, detection: {
    detection: {
        score: number;
        box: {
            x: number;
            y: number;
            width: number;
            height: number;
        };
    };
} | null, videoWidth: number, videoHeight: number): void;
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