interface GetHeatmapImageDataProps {
    canvas: HTMLCanvasElement | null;
    posMap: number[][];
    threshold: number;
}
interface GetHeatmapImageDataReturn {
    heatmapData: ImageData | null;
    heatmapCanvas: HTMLCanvasElement | null;
}
export default function getHeatmapImageData({ canvas, posMap, threshold, }: GetHeatmapImageDataProps): GetHeatmapImageDataReturn;
export {};