IsHeaderCell Method (GdPictureOCR)

In This Topic

Specify whether if the cell's coordinate is located in the table's header.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Function IsHeaderCell( _
   ByVal OCRResultID As String, _
   ByVal TableIdx As Integer, _
   ByVal ColummIdx As Integer, _
   ByVal RowIdx As Integer _
) As Boolean

public bool IsHeaderCell( 
   string OCRResultID,
   int TableIdx,
   int ColummIdx,
   int RowIdx
)

public function IsHeaderCell( 
    OCRResultID: String;
    TableIdx: Integer;
    ColummIdx: Integer;
    RowIdx: Integer
): Boolean;

public function IsHeaderCell( 
   OCRResultID : String,
   TableIdx : int,
   ColummIdx : int,
   RowIdx : int
) : boolean;

public: bool IsHeaderCell( 
   string* OCRResultID,
   int TableIdx,
   int ColummIdx,
   int RowIdx
)

public:
bool IsHeaderCell( 
   String^ OCRResultID,
   int TableIdx,
   int ColummIdx,
   int RowIdx
)

Parameters

OCRResultID: The unique result identifier of the executed OCR process obtained by the RunOCR method.
TableIdx: The 0-based index of the detected table within the specified OCR result. It must be a value between 0 and GetTableCount(OCRResultID) - 1.
ColummIdx: The 0-based index of the cell's column in a detected table within the specified OCR result. It must be a value between 0 and GetTableColumnCount(OCRResultID) - 1.
RowIdx: The 0-based index of the cell's row in a detected table within the specified OCR result. It must be a value between 0 and GetTableRowCount(OCRResultID) - 1.

Return Value

True if the specified cell is part of the header, false otherwise.

Please always use the GetStat method to determine if this method has been successful.

Remarks

This method requires the KVP and Table Processing - Intelligent Redaction component to run.

Example

using GdPictureImaging img = new GdPictureImaging();
int invoiceId = img.CreateGdPictureImageFromHTTP("https://passportpdfapi.com/", "test/invoice.png", 443);
if (img.GetStat() != GdPictureStatus.OK)
{
    Console.WriteLine($"An error occurred during image loading ({img.GetStat()})");
    return;
}
 
using GdPictureOCR ocr = new GdPictureOCR();
ocr.ResourcesFolder = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? "C:\\GdPicture.Net 14\\redist\\OCR" : "/mnt/c/GdPicture.Net 14/redist/OCR";
ocr.OCRMode = OCRMode.FavorAccuracy;
ocr.AddLanguage(OCRLanguage.French);
ocr.SetImage(invoiceId);
 
string ocrResultId = ocr.RunOCR();
 
if (ocr.GetStat() == GdPictureStatus.OK)
{
    Console.WriteLine();
    for (int tableIdx = 0; tableIdx < ocr.GetTableCount(ocrResultId); tableIdx++)
    {
        int colCount = ocr.GetTableColumnCount(ocrResultId, tableIdx);
        int rowCount = ocr.GetTableRowCount(ocrResultId, tableIdx);
        string[,] tableContent = new string[colCount, rowCount];
        int[] maxLinesInRows = new int[rowCount];
 
        for (int rowIdx = 0; rowIdx < rowCount; rowIdx++)
        {
            for (int colIdx = 0; colIdx < colCount; colIdx++)
            {
                tableContent[colIdx, rowIdx] = ocr.GetTableCellText(ocrResultId, tableIdx, colIdx, rowIdx);
            }
        }
 
        // Compute table formatting
        int[] widestCellInColumn = new int[colCount];
        for (int colIdx = 0; colIdx < colCount; colIdx++)
        for (int rowIdx = 0; rowIdx < rowCount; rowIdx++)
        {
            if (tableContent[colIdx, rowIdx].Length > widestCellInColumn[colIdx])
            {
                widestCellInColumn[colIdx] = tableContent[colIdx, rowIdx].Length;
            }
        }
        int rowLength = widestCellInColumn.Sum() + (3 * colCount);
        string separator = new string('=', (int)Math.Truncate((double)rowLength / 2) - 4);
 
        // Print table
        Console.WriteLine($"{separator} Table {tableIdx} {separator}");
        //if first two column is consired as header, consider the entire row as header
        bool isHorizontalHeaderRow = ocr.IsHeaderCell(ocrResultId, tableIdx, 0, 0) && ocr.IsHeaderCell(ocrResultId, tableIdx, 1, 0);
        for (int rowIdx = 0; rowIdx < rowCount; rowIdx++)
        {
            bool isCurrentRowHeader = ocr.IsHeaderCell(ocrResultId, tableIdx, 0, rowIdx) && ocr.IsHeaderCell(ocrResultId, tableIdx, 1, rowIdx);
            for (int colIdx = 0; colIdx < colCount; colIdx++)
            {
                string prettifiedCell = tableContent[colIdx, rowIdx].Replace(Environment.NewLine, "").PadRight(widestCellInColumn[colIdx]);
                Console.Write($" {prettifiedCell} |{(!isHorizontalHeaderRow ? "|" : null)}");
            }
            Console.WriteLine();
            if (isCurrentRowHeader)
            {
                Console.WriteLine(new string('=', rowLength)); //If header row, write a header separator
            }
        }
        Console.WriteLine($"{separator} Table {tableIdx} {separator}");
        Console.WriteLine();
 
    }
    ocr.ReleaseOCRResult(ocrResultId);
    img.ReleaseGdPictureImage(invoiceId);
}
else
{
    Console.WriteLine($"OCR result : {ocr.GetStat()}");
}

Reference

GdPictureOCR Class
GdPictureOCR Members
GetTableCount Method
GetTableRect Method
GetTableColumnCount Method
GetTableCellRect Method
GetTableCellText Method
GetTableRowRect Method
GetTableColumnRect Method
GetTableRowCount Method