이러한 이미지 형식 중 JPEG를 비롯한 일부는 '손실' 형식입니다. 손실 형식의 파일 크기를 줄이면 이미지 품질과 Document AI의 결과 정확성이 저하될 수 있습니다.
문서 스캔 해상도
Document AI에서 가장 정확한 OCR 결과를 얻으려면 문서 스캔이 최소 200dpi(인치당 도트 수)여야 합니다.
일반적으로 300dpi 이상이 가장 좋은 결과를 냅니다. OCR 정확도는 해상도와 최소 글꼴 크기뿐만 아니라 문서 (손으로 쓴 경우 필기) 품질과 같은 다른 요인에 따라 달라지므로 테스트하는 것이 좋습니다.
이미지 품질 분석 기능을 사용하면 해상도 문제를 평가할 수 있습니다.
참고: 바코드를 읽으려면 미국 운전면허증 뒷면 이미지의 크기가 2,000x3,000픽셀이어야 합니다.
[[["이해하기 쉬움","easyToUnderstand","thumb-up"],["문제가 해결됨","solvedMyProblem","thumb-up"],["기타","otherUp","thumb-up"]],[["이해하기 어려움","hardToUnderstand","thumb-down"],["잘못된 정보 또는 샘플 코드","incorrectInformationOrSampleCode","thumb-down"],["필요한 정보/샘플이 없음","missingTheInformationSamplesINeed","thumb-down"],["번역 문제","translationIssue","thumb-down"],["기타","otherDown","thumb-down"]],["최종 업데이트: 2025-09-04(UTC)"],[[["\u003cp\u003eDocument AI supports various image file types, including PDF, GIF, TIFF, JPEG, PNG, BMP, and WebP, as well as HTML files.\u003c/p\u003e\n"],["\u003cp\u003eFile size and page limits for Document AI are detailed on the Quotas and Limits page.\u003c/p\u003e\n"],["\u003cp\u003eReducing file sizes for lossy image formats like JPEG may result in a degradation of image quality and accuracy of the output from Document AI.\u003c/p\u003e\n"],["\u003cp\u003eFor optimal OCR results, document scans should be at least 200 dpi, with 300 dpi or higher recommended, and US driver's license back side images require 2k x 3k pixels for barcode reading.\u003c/p\u003e\n"],["\u003cp\u003eHTML support is restricted to the Layout Parser feature in Document AI.\u003c/p\u003e\n"]]],[],null,["# Supported Files\n===============\n\nFile Types\n----------\n\nDocument AI supports the following image types.\n\nFor information about file size and page limits, refer to the [Quotas and Limits](/document-ai/quotas#content_limits)\npage.\n\nNote that some of these image formats are \"lossy\" (for example, JPEG). Reducing\nfile sizes for lossy formats may result in a degradation of image quality and\naccuracy of results from Document AI.\n| **Note:** Prior JPEG compressions for TIFF are unsupported. Type of JPEG encapsulation defined by the TIFF [version 6.0 specification](https://gitlab.com/libtiff/libtiff/-/commit/f0a54a4fa0cfa377f493d57ee2af393005d5bbe5).\n| **Note:** HTML support is only available with [layout parser](/document-ai/docs/layout-parse-chunk). [Custom splitter](/document-ai/docs/custom-splitter) only supports PDF, TIFF, TIF, and GIF file types.\n\n### Document scan resolution\n\nFor most accurate OCR results from Document AI, document scans should be\na minimum of 200 dpi [(dots per inch)](https://en.wikipedia.org/wiki/Dots_per_inch).\n300 dpi and higher generally produce the best results. OCR accuracy is dependent\non both the resolution and the minimum font size, along with other factors like\ndocument (and if handwritten, handwriting) quality, so testing is recommended.\nThe [image quality analysis](/document-ai/docs/process-documents-ocr#image-quality_analysis)\nfeature can help evaluate resolution concerns.\n\nNOTE: 2k x 3k pixels are required for the US driver's license back side image in\norder to read the barcode."]]
