The unique result identifier of the executed segmentation process obtained by the RunSegmentation method.
The 0-based index of the character within the specified segmentation result. It must be a value between 0 and GetCharacterCount(SegmentationResultID)-1.
Example





In This Topic
GdPicture14 Namespace / GdPictureSegmenter Class / GetCharacterLeft Method

GetCharacterLeft Method (GdPictureSegmenter)

In This Topic
Returns the left x-coordinate of the bounding box of the specified character, that is a part of the segmentation result specified by its index.

This method uses a coordinate system, where the origin is in the top-left corner of the processed image and the units are pixels.

Syntax
'Declaration

 

Public Function GetCharacterLeft( _

   ByVal SegmentationResultID As String, _

   ByVal CharacterIdx As Integer _

) As Integer
public int GetCharacterLeft( 

   string SegmentationResultID,

   int CharacterIdx

)
public function GetCharacterLeft( 

    SegmentationResultID: String;

    CharacterIdx: Integer

): Integer; 
public function GetCharacterLeft( 

   SegmentationResultID : String,

   CharacterIdx : int

) : int;
public: int GetCharacterLeft( 

   string* SegmentationResultID,

   int CharacterIdx

) 
public:

int GetCharacterLeft( 

   String^ SegmentationResultID,

   int CharacterIdx

) 

Parameters

SegmentationResultID
The unique result identifier of the executed segmentation process obtained by the RunSegmentation method.
CharacterIdx
The 0-based index of the character within the specified segmentation result. It must be a value between 0 and GetCharacterCount(SegmentationResultID)-1.

Return Value

The left x-coordinate of the character's bounding box, in pixels.

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

Remarks
It is recommend to use the GetStat method to identify the specific reason for the method's failure, if any.

Please note, that the origin of the used coordinate system is in the top-left corner of the processed image and the used units are pixels.

Example
How to find out detected characters within the segmentation result. All characters are subsequently color-coded and saved into the output file.
Dim caption As String = "Example: GetCharacterLeft"

Using gdpictureSegmenter As GdPictureSegmenter = New GdPictureSegmenter()

    Using gdpictureImaging As GdPictureImaging = New GdPictureImaging()

        'Set up the image you want to process.

        Dim image As Integer = gdpictureImaging.CreateGdPictureImageFromFile("input.tif")

        If (gdpictureImaging.GetStat() = GdPictureStatus.OK) AndAlso

           (gdpictureSegmenter.SetImage(image) = GdPictureStatus.OK) Then

            'Set the segmentation mode.

            gdpictureSegmenter.SegmentationMode = SegmentationMode.ConnectedComponents4

            'Run the segmentation process.

            Dim resultID As String = gdpictureSegmenter.RunSegmentation()

            If gdpictureSegmenter.GetStat() = GdPictureStatus.OK Then

                'Check the results.

                Dim characterCount As Integer = gdpictureSegmenter.GetCharacterCount(resultID)

                If gdpictureSegmenter.GetStat() = GdPictureStatus.OK Then

                    Dim message As String = "The number of detected characters: "

                    message = message + characterCount.ToString() + vbCrLf

                    Dim top As Integer = 0, left As Integer = 0, bottom As Integer = 0, right As Integer = 0, save As Integer = 0

                    For i As Integer = 0 To characterCount - 1

                        top = gdpictureSegmenter.GetCharacterTop(resultID, i)

                        If gdpictureSegmenter.GetStat() = GdPictureStatus.OK Then left = gdpictureSegmenter.GetCharacterLeft(resultID, i)

                        If gdpictureSegmenter.GetStat() = GdPictureStatus.OK Then bottom = gdpictureSegmenter.GetCharacterBottom(resultID, i)

                        If gdpictureSegmenter.GetStat() = GdPictureStatus.OK Then right = gdpictureSegmenter.GetCharacterRight(resultID, i)

                        If gdpictureSegmenter.GetStat() = GdPictureStatus.OK Then

                            If gdpictureImaging.DrawRectangle(image, left, top, right - left, bottom - top, 5, Color.Brown, True) = GdPictureStatus.OK Then

                                message = message + (i + 1).ToString() + ".rectangle has been drawn." + vbCrLf

                                save += 1

                            Else

                                message = message + (i + 1).ToString() + ".rectangle HAS NOT been drawn. Status: " + gdpictureSegmenter.GetStat().ToString() + vbCrLf

                            End If

                        Else

                            message = message + i.ToString() + ".word has failed to get its position. Status: " + gdpictureSegmenter.GetStat().ToString() + vbCrLf

                        End If

                    Next

                    If characterCount = 0 Then

                        message = message + "The resulting image HAS NOT been created."

                    Else

                        If save = characterCount Then

                            If gdpictureImaging.SaveAsTIFF(image, "output.tif", TiffCompression.TiffCompressionAUTO) = GdPictureStatus.OK Then

                                message = message + "The resulting image HAS been saved successfully."

                            Else

                                message = message + "The resulting image HAS NOT been saved. Status: " + gdpictureImaging.GetStat().ToString()

                            End If

                        End If

                    End If

                    MessageBox.Show(message, caption)

                Else

                    MessageBox.Show("The GetCharacterCount() method has failed with the status: " + gdpictureSegmenter.GetStat().ToString(), caption)

                End If

            Else

                MessageBox.Show("The segmentation process has failed with the status: " + gdpictureSegmenter.GetStat().ToString(), caption)

            End If

            'Release the used image.

            gdpictureImaging.ReleaseGdPictureImage(image)

        Else

            MessageBox.Show("The error occurred when setting up the image: " + gdpictureImaging.GetStat().ToString() + " or " + gdpictureSegmenter.GetStat().ToString(), caption)

        End If

    End Using

    'Release resources.

    gdpictureSegmenter.ReleaseSegmentationResults()

End Using
string caption = "Example: GetCharacterLeft";

using (GdPictureSegmenter gdpictureSegmenter = new GdPictureSegmenter())

{

    //Set up the image you want to process.

    using (GdPictureImaging gdpictureImaging = new GdPictureImaging())

    {

        //The standard open file dialog displays to allow you to select the file.

        int image = gdpictureImaging.CreateGdPictureImageFromFile("input.tif");

        if ((gdpictureImaging.GetStat() == GdPictureStatus.OK) &&

            (gdpictureSegmenter.SetImage(image) == GdPictureStatus.OK))

        {

            //Set the segmentation mode.

            gdpictureSegmenter.SegmentationMode = SegmentationMode.ConnectedComponents4;

            //Run the segmentation process.

            string resultID = gdpictureSegmenter.RunSegmentation();

            if (gdpictureSegmenter.GetStat() == GdPictureStatus.OK)

            {

                //Check the results.

                int characterCount = gdpictureSegmenter.GetCharacterCount(resultID);

                if (gdpictureSegmenter.GetStat() == GdPictureStatus.OK)

                {

                    string message = "The number of detected characters: ";

                    message = message + characterCount.ToString() + "\n";

                    int top = 0, left = 0, bottom = 0, right = 0, save = 0;

                    for (int i = 0; i < characterCount; i++)

                    {

                        top = gdpictureSegmenter.GetCharacterTop(resultID, i);

                        if (gdpictureSegmenter.GetStat() == GdPictureStatus.OK)

                            left = gdpictureSegmenter.GetCharacterLeft(resultID, i);

                        if (gdpictureSegmenter.GetStat() == GdPictureStatus.OK)

                            bottom = gdpictureSegmenter.GetCharacterBottom(resultID, i);

                        if (gdpictureSegmenter.GetStat() == GdPictureStatus.OK)

                            right = gdpictureSegmenter.GetCharacterRight(resultID, i);

                        if (gdpictureSegmenter.GetStat() == GdPictureStatus.OK)

                        {

                            if (gdpictureImaging.DrawRectangle(image, left, top, right - left, bottom - top, 5, Color.Brown, true) == GdPictureStatus.OK)

                            {

                                message = message + (i + 1).ToString() + ".rectangle has been drawn.\n";

                                save++;

                            }

                            else

                                message = message + (i + 1).ToString() + ".rectangle HAS NOT been drawn. Status: " + gdpictureSegmenter.GetStat().ToString() + "\n";

                        }

                        else

                            message = message + i.ToString() + ".word has failed to get its position. Status: " + gdpictureSegmenter.GetStat().ToString() + "\n";

                    }

                    if (characterCount == 0)

                    {

                        message = message + "The resulting image HAS NOT been created.";

                    }

                    else

                    {

                        if (save == characterCount)

                        {

                            if (gdpictureImaging.SaveAsTIFF(image, "output.tiff", TiffCompression.TiffCompressionAUTO) == GdPictureStatus.OK)

                                message = message + "The resulting image HAS been saved successfully.";

                            else

                                message = message + "The resulting image HAS NOT been saved. Status: " + gdpictureImaging.GetStat().ToString();

                        }

                    }

                    MessageBox.Show(message, caption);

                }

                else

                    MessageBox.Show("The GetCharacterCount() method has failed with the status: " + gdpictureSegmenter.GetStat().ToString(), caption);

            }

            else

                MessageBox.Show("The segmentation process has failed with the status: " + gdpictureSegmenter.GetStat().ToString(), caption);

            //Release the used image.

            gdpictureImaging.ReleaseGdPictureImage(image);

        }

        else

            MessageBox.Show("The error occurred when setting up the image: " + gdpictureImaging.GetStat().ToString() + " or " + gdpictureSegmenter.GetStat().ToString(), caption);

    }

    //Release resources.

    gdpictureSegmenter.ReleaseSegmentationResults();

}
See Also