GdPictureImaging.HistogramGetARGB Method

Computes in one call, alpha, red, green and blue channel histograms of a GdPicture image.

public GdPictureStatus HistogramGetARGB(
    int ImageID, 
    ref int arHistoA, 
    ref int arHistoR, 
    ref int arHistoG, 
    ref int arHistoB
);

Visual Basic

Public Function HistogramGetARGB(
    ByVal ImageID As Integer, 
    ByRef arHistoA() As Integer, 
    ByRef arHistoR() As Integer, 
    ByRef arHistoG() As Integer, 
    ByRef arHistoB() As Integer
) As GdPictureStatus

Parameters

Parameters	Description
ImageID	GdPicture Image Identifier.
arHistoA	Output parameter. Array of 256 entries containing the alpha channel histogram data.
arHistoR	Output parameter. Array of 256 entries containing the red channel histogram data.
arHistoG	Output parameter. Array of 256 entries containing the green channel histogram data.
arHistoB	Output parameter. Array of 256 entries containing the blue channel histogram data.

Returns

A member of the GdPictureStatus enumeration.

Example

Copy Code

Dim oGdPictureImaging As New GdPictureImaging
Dim arHistoA(0 To 255) As Integer
Dim arHistoR(0 To 255) As Integer
Dim arHistoG(0 To 255) As Integer
Dim arHistoB(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.HistogramGetARGB(ImageID, arHistoA, arHistoR, arHistoG, arHistoB)
oGdPictureImaging.ReleaseGdPictureImage(ImageID)