Chroma Keying

[kenknight]

Hi all,

Not sure if this is the right forum, however, I'm looking for an Image Library that can take a picture of an object in front of a green screen and replace the green screen with the picture of my choice. Does gdpicture support this?

THanks,
ken

[Loïc]

Hi,

You can do that easily using the DrawImageTransparencyColorEx() method of the GdPicture Pro component:

Code: Select all

 Dim nMainImage As Long
 Dim nBackGroundImage As Long

 nBackGroundImage = Imaging1.CreateImageFromFile("landscape.jpg") 'image to draw on red background
 nMainImage = Imaging1.CreateImageFromFile("c:\main.jpg") 'image with Red background
 Imaging1.SetNativeImage (nBackGroundImage)

 Call Imaging1.DrawImageTransparencyColorEx(nMainImage, Green, 95, 0, 0, Imaging1.GetWidth, Imaging1.GetHeight)
 
 Call Imaging1.SaveAsJPEG("output.jpg")

 Call Imaging1.CloseImage(nMainImage)
 Call Imaging1.CloseImage(nBackGroundImage)

Best regards,

Loïc