import type { Frame } from "react-native-vision-camera";
export declare function installFrameProcessor(): Promise<void>;
/**
 * Type of return value of {@link getImageRgbAverages}.
 */
export interface ImageRgbAverages {
    /** Timestamp of when the frame processor started to work on the frame. */
    timestamp: number;
    /** Time im ms it took the frame processor to process the frame. */
    duration: number;
    /** Average amount of red in the frame. */
    redAverage: number;
    /** Average amount of green in the frame. */
    greenAverage: number;
    /** Average amount of blue in the frame. */
    blueAverage: number;
    /** Sub-sampling factor applied on frame width. */
    widthSubSampling: number;
    /** Sub-sampling factor applied on frame height. */
    heightSubSampling: number;
    /** Width of processed frame. */
    imageWidth: number;
    /** Height of processed frame. */
    imageHeight: number;
}
export declare function getRgbAveragesFrameProcessor(): ((frame: Frame, opt?: {
    subSamplingX?: number;
    subSamplingY?: number;
}) => ImageRgbAverages) | undefined;
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