GdPicture.NET.14~GdPicture14.GdPictureImaging~GetHeight - GetHeight Method (GdPictureImaging) -

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

'Declaration
 
Public Function GetHeight( _
   ByVal ImageID As Integer _
) As Integer

public int GetHeight( 
   int ImageID
)

public function GetHeight( 
    ImageID: Integer
): Integer;

public function GetHeight( 
   ImageID : int
) : int;

public: int GetHeight( 
   int ImageID
)

public:
int GetHeight( 
   int ImageID
)

Parameters

ImageID: GdPicture image identifier.

Return Value

Height in pixels.

Utilizing the height of an image when processing it.

Cropping from a jpeg image.

C#

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg");
 
    // Remove 5% all around the image.
    int height = gdpictureImaging.GetHeight(imageID);
    int width = gdpictureImaging.GetWidth(imageID);
    gdpictureImaging.Crop(imageID, width * 5 / 100, height * 5 / 100, width * 90 / 100, height * 90 / 100);
    
    gdpictureImaging.SaveAsPNG(imageID, "crop.png");
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Getting the red channel histogram of a jpeg image and creating an image representing this histogram.

C#

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", false);
 
    // Get the red channel histogram and the image dimensions.
    int[] histo = new int[256];
    gdpictureImaging.HistogramGetRed(imageID, ref histo);
    int count = gdpictureImaging.GetWidth(imageID) * gdpictureImaging.GetHeight(imageID);
 
    gdpictureImaging.ReleaseGdPictureImage(imageID);
 
    // Create an image representing the histogram. 
    // The image has the same width as the histogram and its height is 1000.                
    int histogramID = gdpictureImaging.CreateNewGdPictureImage(256, 1000, 24, Color.White);
    for (int i = 0; i < 256; i++)
    {
        int value = histo[i] * 1000 / count;
        for (int j = 0; j < value; j++)
        {
            gdpictureImaging.PixelSetColor(histogramID, i, j, Color.Red);
        }
    }
 
    gdpictureImaging.SaveAsPNG(histogramID, "histo.png");
    gdpictureImaging.ReleaseGdPictureImage(histogramID);
}

Utilizing the height of an image when processing it. using (GdPictureImaging gdpictureImaging = new GdPictureImaging()) { int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg"); // Remove 5% all around the image. int height = gdpictureImaging.GetHeight(imageID); int width = gdpictureImaging.GetWidth(imageID); gdpictureImaging.Crop(imageID, width * 5 / 100, height * 5 / 100, width * 90 / 100, height * 90 / 100); gdpictureImaging.SaveAsPNG(imageID, "crop.png"); gdpictureImaging.ReleaseGdPictureImage(imageID); } using (GdPictureImaging gdpictureImaging = new GdPictureImaging()) { int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", false); // Get the red channel histogram and the image dimensions. int[] histo = new int[256]; gdpictureImaging.HistogramGetRed(imageID, ref histo); int count = gdpictureImaging.GetWidth(imageID) * gdpictureImaging.GetHeight(imageID); gdpictureImaging.ReleaseGdPictureImage(imageID); // Create an image representing the histogram. // The image has the same width as the histogram and its height is 1000. int histogramID = gdpictureImaging.CreateNewGdPictureImage(256, 1000, 24, Color.White); for (int i = 0; i < 256; i++) { int value = histo[i] * 1000 / count; for (int j = 0; j < value; j++) { gdpictureImaging.PixelSetColor(histogramID, i, j, Color.Red); } } gdpictureImaging.SaveAsPNG(histogramID, "histo.png"); gdpictureImaging.ReleaseGdPictureImage(histogramID); }

Reference

GdPictureImaging Class
GdPictureImaging Members