/**
 * Image processing utilities: HEIC conversion, EXIF correction, downscaling
 */
import { LoadedImageInfo } from '../types/index.js';
/**
 * Check if a file is HEIC format
 */
export declare function isHeicFile(file: File | Blob): boolean;
/**
 * Convert HEIC to JPEG using heic2any (loaded dynamically)
 */
export declare function convertHeicToJpeg(blob: Blob): Promise<Blob>;
/**
 * Read EXIF orientation from an image blob and return the rotation needed
 * Returns degrees to rotate (0, 90, 180, 270)
 */
export declare function getExifRotation(blob: Blob): Promise<number>;
/**
 * Load an image element from a blob
 */
export declare function loadImageElement(blob: Blob): Promise<HTMLImageElement>;
/**
 * Downscale an image using step-down sampling for quality
 */
export declare function downscaleImage(img: HTMLImageElement, maxDimension: number, rotation?: number): {
    canvas: HTMLCanvasElement;
    width: number;
    height: number;
};
/**
 * Full image loading pipeline: HEIC → EXIF → Downscale → Data URL
 */
export declare function processImage(source: File | Blob | string, configMaxResolution: number | null | undefined): Promise<{
    dataUrl: string;
    info: LoadedImageInfo;
}>;