GdPictureImaging.HistogramGetRed Method

Computes the red channel histogram of a GdPicture image.

public GdPictureStatus HistogramGetRed(
    int ImageID, 
    ref int arHistoR
);

Visual Basic

Public Function HistogramGetRed(
    ByVal ImageID As Integer, 
    ByRef arHistoR() As Integer
) As GdPictureStatus

Parameters

Parameters	Description
ImageID	GdPicture Image Identifier.
arHistoR	Output parameter. Array of 256 entries containing the red channel histogram data.

Returns

A member of the GdPictureStatus enumeration.

Example

Copy Code

Dim oGdPictureImaging As New GdPictureImaging
Dim arHistoR(0 To 255) As Integer
Dim ImageID As Integer
 
oGdPictureImaging.SetLicenseNumber("XXX") 'Replace XXX by a demo or commercial license key
ImageID = oGdPictureImaging.CreateGdPictureImageFromFile("image.tif")
oGdPictureImaging.HistogramGetRed(ImageID, arHistoR)
oGdPictureImaging.ReleaseGdPictureImage(ImageID)