PDF - Beta 🧪

The Pdf tag displays a PDF document in the labeling interface. You can use this tag to:

• Perform document-level annotations such as classification, transcription, and summarization. See PDF for an example labeling config.
• Create regions within pages for OCR, NER, and other types of annotations (beta).

Supports:

• Zoom
• Rotation
• PDFs up to 100 pages

Use with the following data types: PDF.

Parameters

Param	Type	Description
value	string	Data field value containing the URL to the PDF

Example: OCR 🧪

Beta and Label Studio Enterprise only.

Labeling configuration for PDFs:

<View>
  <OcrLabels name="ocr" toName="pdf">
    <Label value="Typo"/>
    <Label value="Incorrect amount"/>
    <Label value="Incorrect name"/>
  </OcrLabels>

  <Pdf name="pdf" value="$pdf"/>
</View>

Example Input data:

{
  "pdf": "https://app.humansignal.com/static/samples/ocr-receipts.pdf"
}

OcrLabels

The above example uses OcrLabels.

This is a new tag to add bounding boxes to the PDF and assign labels to them. This tag must have one or more Label tag children, and supports standard parameters such as maxUsages (see RectangleLabels as an example).

Results:

Result	Type	Description
x, y, width, height	Number	Numbers from 0 to 1 that are relative to the page dimensions.
rotation	Number	Number in degrees clockwise from 0–360. Rotation is calculated with the origin at (x, y) (the top-left corner of the region).
pageIndex	Number	Page number, 1-based.
ocrtext	String	Captured text. This can be edited by selecting the region and then editing the text from the Info panel.