Document AI table confidence

Question

Document AI table confidence

Herson Ian Moneda 60

Apr 24, 2025, 10:18 AM

Hi,

I would like to know if we can extract or get the confidence value of the table. I can get the confidence value of the fields but I had a hard time figuring out if we can get the confidence of each table rows.

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I used this code but it will only get the confidence of the fields string.

            foreach (AnalyzedDocument document in result.Documents)

            {

                Console.WriteLine($"Document of type: {document.DocumentType}");

                foreach (KeyValuePair<string, DocumentField> fieldKvp in document.Fields)

                {

                    string fieldName = fieldKvp.Key;

                    DocumentField field = fieldKvp.Value;

                    Console.WriteLine($"Field '{fieldName}': ");

                    Console.WriteLine($"  Content: '{field.Content}'");

                    Console.WriteLine($"  Confidence: '{field.Confidence}'");

                }

            }

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Answer 1

Prashanth Veeragoni 3,955 Microsoft External Staff

Apr 24, 2025, 3:10 PM

Hi Herson Ian Moneda,

Yes, you're on the right track using the DocumentField.Confidence property, but if you're working with tables (especially rows within a table), Azure Document Intelligence (formerly Form Recognizer) handles tables as a structured set of DocumentTable objects.

To get row-level confidence, you’ll need to access the DocumentTable, then go down to each cell, where you can get the Confidence per cell, and from that, aggregate to estimate the confidence for each row.

How to get row-level table confidence

Here’s how you can do it:

foreach (AnalyzedDocument document in result.Documents)
{
    Console.WriteLine($"Document Type: {document.DocumentType}");

    foreach (DocumentTable table in document.Tables)
    {
        Console.WriteLine("Processing a table...");
        
        int rowIndex = 0;
        foreach (var row in table.Cells.GroupBy(c => c.RowIndex))
        {
            double rowConfidence = row.Average(c => c.Confidence); // Averaging all cell confidences in the row
            Console.WriteLine($"Row {rowIndex}: Confidence = {rowConfidence:P2}");

            foreach (var cell in row)
            {
                Console.WriteLine($"  Cell ({cell.RowIndex},{cell.ColumnIndex}): '{cell.Content}', Confidence: {cell.Confidence:P2}");
            }
            rowIndex++;
        }
    }
}

Explanation:

· document.Tables accesses all tables in a document.

· table.Cells gives all the cells, each of which has:

o RowIndex and ColumnIndex

o Content

o Confidence

· Cells are grouped by RowIndex to simulate rows.

· Confidence for a row is computed as the average confidence of its cells (you can also take min/max/median based on your quality strategy).

Notes:

· This method does not give a single "row confidence" field natively, but it's the best approximation.

· If you’re using Azure.AI.FormRecognizer.DocumentAnalysis, make sure you’re using v3.2+ SDK to access all these properties.

Hope this helps. Do let me know if you any further queries.

If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

Thank you!

Prashanth Veeragoni 3,955 Reputation points Microsoft External Staff

Apr 25, 2025, 5:29 PM

Hi Herson Ian Moneda,

Following up to see if the above answer was helpful. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let me know.

Thank you!
Prashanth Veeragoni 3,955 Reputation points Microsoft External Staff

Apr 28, 2025, 4:36 PM

Hi Herson Ian Moneda,

Just checking in to see if you have got a chance to see my response to your question in resolving the issue.

If you are still facing any further issues, please don't hesitate to reach out to us. We are happy to assist you.

Looking forward to your response and appreciate your time on this.

If you feel that your quires have been resolved, please accept the answer by clicking the "Upvote" and "Accept Answer" on the post.

Thank you!
Herson Ian Moneda 60 Reputation points

Apr 29, 2025, 9:13 AM

hello I'm using FormRecognizer, it seems there is something wrong with the confidence

the document table cell doesn't contain the definition confidence
Prashanth Veeragoni 3,955 Reputation points Microsoft External Staff

Apr 29, 2025, 2:11 PM
Hi Herson Ian Moneda,

Thank you for the clarification. You're likely using Azure Form Recognizer v3.0 (or earlier), or you're using a model or API that does not expose confidence per table cell — which can be the case with the DocumentTableCell class in the SDK, depending on the model version.

DocumentTableCell.Confidence is not available in all SDK versions or model types (e.g., prebuilt-invoice vs. layout vs. custom model). This is a known limitation in some older or specific prebuilt models.

Recommended Actions:

Option1: Upgrade SDK to v3.2 or later (if not already)

Ensure you’re using:

·       NuGet package: Azure.AI.FormRecognizer

·       Version: >= 3.2.0

·       Model: Azure Document Intelligence with API version 2023-07-31 or later

Only in this newer version do you get confidence scores at the DocumentTableCell level.

To update:

dotnet add package Azure.AI.FormRecognizer --version 3.2.0

Option2: Workaround Using Word-Level Confidences

If cell.Confidence is not available, but Spans or BoundingRegions are, you can extract word-level confidence from the page and aggregate them manually per cell.

Here’s an outline of that:

foreach (var table in document.Tables) { var cells = table.Cells; foreach (var rowGroup in cells.GroupBy(c => c.RowIndex)) { double totalConfidence = 0; int wordCount = 0; foreach (var cell in rowGroup) { foreach (var span in cell.Spans) { var word = result.Pages .SelectMany(p => p.Words) .FirstOrDefault(w => w.Span.Offset == span.Offset); if (word != null) { totalConfidence += word.Confidence; wordCount++; } } } double rowConfidence = wordCount > 0 ? totalConfidence / wordCount : 0; Console.WriteLine($"Row {rowGroup.Key} Confidence: {rowConfidence:P2}"); } }

This works only if your model returns Words with Confidence and the cell includes Spans.

Hope this helps, do let me know if you have any further queries.

Thank you!
Herson Ian Moneda 60 Reputation points

Apr 29, 2025, 4:05 PM

thank you for this. will have a work around

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