C#でドキュメントのテーブルから文字認識・テキスト抽出を行う方法

using System;
using System.Collections.Generic;
using System.Linq;

// A helper class to process table data by sorting cells based on coordinates
public static class TableProcessor
{
    // Method to organize cells by their coordinates (Y top to bottom, X left to right)
    public static List<CellInfo> OrganizeCellsByCoordinates(List<CellInfo> cells)
    {
        // Sort cells by Y (top to bottom), then by X (left to right)
        var sortedCells = cells
            .OrderBy(cell => cell.CellRect.Y)
            .ThenBy(cell => cell.CellRect.X)
            .ToList();

        return sortedCells;
    }

    // Example method demonstrating how to process multiple tables
    public static void ProcessTables(Tables tables)
    {
        foreach (var table in tables)
        {
            var sortedCells = OrganizeCellsByCoordinates(table.CellInfos);

            Console.WriteLine("Organized Table Cells:");

            // Initialize previous Y coordinate
            int previousY = sortedCells.Any() ? sortedCells.First().CellRect.Y : 0;

            foreach (var cell in sortedCells)
            {
                // Print a new line if the Y-coordinate changes, indicating a new row
                if (Math.Abs(cell.CellRect.Y - previousY) > cell.CellRect.Height * 0.8)
                {
                    Console.WriteLine();  // Start a new row
                    previousY = cell.CellRect.Y;
                }

                // Print the cell text followed by a tab
                Console.Write($"{cell.CellText}\t");
            }

            Console.WriteLine("\n--- End of Table ---");  // End of a table
        }
    }

    // Method to extract a specific row by the given index
    public static List<CellInfo> ExtractRowByIndex(TableInfo table, int rowIndex)
    {
        if (table == null || table.CellInfos == null || !table.CellInfos.Any())
        {
            throw new ArgumentException("Table is empty or invalid.");
        }

        var sortedCells = OrganizeCellsByCoordinates(table.CellInfos);
        List<List<CellInfo>> rows = new List<List<CellInfo>>();

        // Group cells into rows based on Y coordinates
        int previousY = sortedCells.First().CellRect.Y;
        List<CellInfo> currentRow = new List<CellInfo>();

        foreach (var cell in sortedCells)
        {
            if (Math.Abs(cell.CellRect.Y - previousY) > cell.CellRect.Height * 0.8)
            {
                // Store the completed row and start a new one
                rows.Add(new List<CellInfo>(currentRow));
                currentRow.Clear();

                previousY = cell.CellRect.Y;
            }

            currentRow.Add(cell);
        }

        // Add the last row if it wasn't added yet
        if (currentRow.Any())
        {
            rows.Add(currentRow);
        }

        // Retrieve the specified row
        if (rowIndex < 0 || rowIndex >= rows.Count)
        {
            throw new IndexOutOfRangeException($"Row index {rowIndex} is out of range.");
        }

        return rows[rowIndex];
    }
}

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections.Generic
Imports System.Linq

' A helper class to process table data by sorting cells based on coordinates
Public Module TableProcessor
	' Method to organize cells by their coordinates (Y top to bottom, X left to right)
	Public Function OrganizeCellsByCoordinates(ByVal cells As List(Of CellInfo)) As List(Of CellInfo)
		' Sort cells by Y (top to bottom), then by X (left to right)
		Dim sortedCells = cells.OrderBy(Function(cell) cell.CellRect.Y).ThenBy(Function(cell) cell.CellRect.X).ToList()

		Return sortedCells
	End Function

	' Example method demonstrating how to process multiple tables
	Public Sub ProcessTables(ByVal tables As Tables)
		For Each table In tables
			Dim sortedCells = OrganizeCellsByCoordinates(table.CellInfos)

			Console.WriteLine("Organized Table Cells:")

			' Initialize previous Y coordinate
			Dim previousY As Integer = If(sortedCells.Any(), sortedCells.First().CellRect.Y, 0)

			For Each cell In sortedCells
				' Print a new line if the Y-coordinate changes, indicating a new row
				If Math.Abs(cell.CellRect.Y - previousY) > cell.CellRect.Height * 0.8 Then
					Console.WriteLine() ' Start a new row
					previousY = cell.CellRect.Y
				End If

				' Print the cell text followed by a tab
				Console.Write($"{cell.CellText}" & vbTab)
			Next cell

			Console.WriteLine(vbLf & "--- End of Table ---") ' End of a table
		Next table
	End Sub

	' Method to extract a specific row by the given index
	Public Function ExtractRowByIndex(ByVal table As TableInfo, ByVal rowIndex As Integer) As List(Of CellInfo)
		If table Is Nothing OrElse table.CellInfos Is Nothing OrElse Not table.CellInfos.Any() Then
			Throw New ArgumentException("Table is empty or invalid.")
		End If

		Dim sortedCells = OrganizeCellsByCoordinates(table.CellInfos)
		Dim rows As New List(Of List(Of CellInfo))()

		' Group cells into rows based on Y coordinates
		Dim previousY As Integer = sortedCells.First().CellRect.Y
		Dim currentRow As New List(Of CellInfo)()

		For Each cell In sortedCells
			If Math.Abs(cell.CellRect.Y - previousY) > cell.CellRect.Height * 0.8 Then
				' Store the completed row and start a new one
				rows.Add(New List(Of CellInfo)(currentRow))
				currentRow.Clear()

				previousY = cell.CellRect.Y
			End If

			currentRow.Add(cell)
		Next cell

		' Add the last row if it wasn't added yet
		If currentRow.Any() Then
			rows.Add(currentRow)
		End If

		' Retrieve the specified row
		If rowIndex < 0 OrElse rowIndex >= rows.Count Then
			Throw New IndexOutOfRangeException($"Row index {rowIndex} is out of range.")
		End If

		Return rows(rowIndex)
	End Function
End Module