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width: number; height: number }> {\n type SharpFactory = (input: Buffer) => {\n ensureAlpha(): { raw(): { toBuffer(opts: { resolveWithObject: true }): Promise<{ data: Buffer; info: { width: number; height: number } }> } }\n }\n let sharp: SharpFactory\n try {\n const mod = (await import(\"sharp\")) as unknown as { default?: SharpFactory } & SharpFactory\n sharp = typeof mod === \"function\" ? mod : (mod.default ?? (mod as unknown as SharpFactory))\n } catch (e) {\n throw new Error(\n \"이미지 파싱에는 optional dependency 'sharp' 가 필요합니다. \" +\n `\\`npm install sharp\\` 후 다시 실행하세요. 원인: ${(e as Error).message}`,\n )\n }\n const { data, info } = await sharp(Buffer.from(buffer)).ensureAlpha().raw().toBuffer({ resolveWithObject: true })\n return { data: new Uint8Array(data.buffer, data.byteOffset, data.byteLength), width: info.width, height: info.height }\n}\n\n/** OcrProvider 계약용 mime 판별 */\nfunction detectImageMime(buffer: ArrayBuffer): string {\n const b = new Uint8Array(buffer, 0, Math.min(12, buffer.byteLength))\n if (b[0] === 0xff && b[1] === 0xd8) return \"image/jpeg\"\n if (b[0] === 0x52 && b[1] === 0x49) return \"image/webp\"\n return \"image/png\"\n}\n"]}