Alpha channel is an additional image channel that specifies transparency (or opacity) of each pixel in the image. ImageGear provides alpha channel support for the following file format filters:
| Format |
Support |
| Adobe PSB |
Supports single Alpha channel for Read only. Supports additional Alpha channels as ImageGear Extra channels for Read only. |
| Adobe PSD |
Supports single Alpha channel for Read only. Supports additional Alpha channels as ImageGear Extra channels for Read only. |
| CUR |
Supports single 8-bit alpha channel for read/write. Supports single 1-bit alpha channel for read only. |
| EXIF-JPEG |
Supports single Alpha channel for Read/write. |
| EXIF-TIFF |
Supports single Alpha channel for read only. Supports additional Alpha channels as ImageGear Extra channels for read only.The following compressions are supported with alpha channel:
- Uncompressed
- Packed Bits
- LZW
- Deflate
|
| FlashPix |
Supports single Alpha channel for read only. Converts RGB + Alpha to RGB during loading. |
| ICO |
Supports single 8-bit alpha channel for read/write. Supports single 1-bit alpha channel for read only. |
| JPEG |
Supports single Alpha channel for Read/write. |
| JPEG 2000 |
Supports single Alpha channel for read/write, for Grayscale and RGB images. |
| JPX |
Supports single Alpha channel for read/write, for Grayscale and RGB images. Supports additional Alpha channels as ImageGear Extra channels for read/write. |
| MAC PICT |
Supports single alpha channel for read only. Alpha channel have to be 8-bit image. |
| PNG |
Supports single Alpha channel for read/write. |
| RAW |
Supports single Alpha channel in uncompressed images for read only. |
| SGI |
Supports single alpha channel for read and write. |
| TGA |
Supports single alpha channel for read and write. |
| TIFF |
Supports single Alpha channel for read and write. Supports additional Alpha channels as ImageGear Extra channels for read and write.The following compressions are supported with alpha channel:
- Uncompressed
- Packed Bits
- LZW
- Deflate
|