WmpBitmapEncoder.AlphaDataDiscardLevel Property
Definition
Important
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Gets or sets the level of alpha frequency data to discard during a compressed domain transcode.
public:
property System::Byte AlphaDataDiscardLevel { System::Byte get(); void set(System::Byte value); };public byte AlphaDataDiscardLevel { get; set; }member this.AlphaDataDiscardLevel : byte with get, setPublic Property AlphaDataDiscardLevel As ByteProperty Value
The level of alpha data to discard when encoding the image. The value range is 0 (no data discarded) to 4 (alpha channel completely discarded). The default is 1.
| Value | Description |
|---|---|
| 0 | No image frequency data is discarded. |
| 1 | FlexBits are discarded. The image quality of the image is reduced without changing the effective resolution of the image. |
| 2 | HighPass frequency data band is discarded. The image's effective resolution is reduced by a factor of 4 in both dimensions. |
| 3 | HighPass and LowPass frequency data bands are discarded. The image's effective resolution is reduced by a factor of 16 in both dimensions. |
| 4 | The alpha channel is completely discarded. The pixel format is changed to reflect the removal of the alpha channel. |
Exceptions
The value given is not between 0 and 4.
Remarks
This property has an effect only if CompressedDomainTranscode is set to true and the image contains either a planar or interleaved alpha channel; otherwise, it is ignored.
Applies to
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