import type { ContourCoordinates } from ".";
import type { RomaineModes } from "../util";
declare type ExtendedExportOptions = ImageExportOptions & {
    jpeg?: {
        /** Transform transparent pixels (0,0,0,1) to white (255,255,255,0)
         *  when converting from transparent png/webp to jpeg
         * */
        transparentToWhite?: boolean;
    };
};
export interface RomaineRef {
    getBlob?: (options: Partial<ExtendedExportOptions>) => Promise<Blob | null>;
    getDataURL?: (options: Partial<ImageExportOptions>) => Promise<string>;
    crop?: () => Promise<void>;
    /**
     * flips the image horizontally or vertically
     */
    flip?: (orientation: "horizontal" | "vertical") => Promise<void>;
}
export declare type CropFunc = (options?: Partial<ClickCropOptions>) => Promise<void>;
interface ClickCropOptions {
    preview: boolean;
    filterCvParams: Partial<OpenCVFilterProps>;
    image: Partial<ImageExportOptions>;
    cropPoints: ContourCoordinates;
    imageResizeRatio: number;
    mode: RomaineModes;
}
interface OpenCVFilterProps {
    blur: boolean;
    th: boolean;
    thMode: any;
    thMeanCorrection: number;
    thBlockSize: number;
    thMax: number;
    grayScale: boolean;
}
export interface ImageExportOptions {
    /**A DOMString indicating the image format. The default type is image/png; that type is also used if the given type isn't supported.
     * @external https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob
     */
    type: "image/png" | "image/jpeg" | "image/webp" | "keep-same";
    /**A Number between 0 and 1, indicating image quality if the requested type is image/jpeg or image/webp. If this argument is anything else, the default values 0.92 and 0.80 are used for image/jpeg and image/webp respectively. Other arguments are ignored.
     *
     * This argument is used when creating images using lossy compression (such as image/jpeg), to specify the quality of the output.
     *
     * @external https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob
     */
    quality: number;
}
export {};
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