poIImagePlane SetColorAlphaTolerance
Sets the search tolerance for the target color that will be made transparent when the ColorAlpha image post-processing filter is active on the image plane.
Syntax
Imageplane_handle SetColorAlphaTolderance tolerance
Application
HyperView Tcl Modify
Description
The image plane offers several image post-processing filters that can be run on the image or video. The ColorAlpha filter makes the target color in the image or video transparent. This command specifies the search tolerance for the target color. This only applies when the filter mode is set to “equal”.
Inputs
- tolerance
- The search tolerance, specified as an integer that represents a tolerance percentage applied to the color value when searching.
Example
hwi OpenStack
if {[catch {
hwi GetActiveClientHandle client_handle
hwi GetSessionHandle session_handle
client_handle GetImagePlaneCtrlHandle ipc_handle
set ipid1 [ipc_handle AddImagePlane Logo1]
ipc_handle GetImagePlaneHandle imageplane_handle $ipid1
imageplane_handle SetFileName g:/samples2/VideoOverlay/Altair_logo.jpg
imageplane_handle SetMode background
imageplane_handle SetCrop 0 0 0.9995 0.995
imageplane_handle SetFilterType ColorAlpha;
imageplane_handle SetFilterMode equal;
imageplane_handle SetColorAlphaTarget "255 255 255"
imageplane_handle SetColorAlphaTolerance 18
imageplane_handle SetMipMapMode Linear1
puts " Filter Type: [imageplane_handle GetFilterType]";
puts " Filter Mode: [imageplane_handle GetFilterMode]";
puts " Alpha Color Target: [imageplane_handle GetColorAlphaTarget]";
puts " Alpha Color Tolerance: [imageplane_handle GetColorAlphaTolerance]";
puts " MipMap Mode: [imageplane_handle GetMipMapMode]";
client_handle Draw
} result]} {
global errorInfo;
puts stderr $result;
puts "[session_handle GetError]";
puts stderr "*** Tcl TRACE ***";
puts stderr $errorInfo;
} else {
puts "No errors.";
puts "Warnings: ";
puts " [session_handle GetError]";
}
hwi CloseStack
Errors
Returns HW_InvalidHandle if the image plane handle is invalid, or poIInvalidImgFilterMode if the specified filter mode is not recognized.