Hi
This code works for me:
// Save a PNG with alpha to TIFF
ImageEnView1.IO.LoadFromFile( 'D:\Alpha.png' );
ImageEnView1.IEBitmap.PixelFormat := ie24RGB;
ImageEnView1.IO.Params.TIFF_PhotometInterpret := ioTIFF_RGB;
ImageEnView1.IO.Params.SamplesPerPixel := 4;
ImageEnView1.IO.Params.BitsPerSample := 8;
ImageEnView1.IO.Params.TIFF_Compression := ioTIFF_UNCOMPRESSED;
ImageEnView1.IO.SaveToFile( 'D:\Alpha.TIFF' );
Can you show me your code and your source image.
Nigel
Xequte Software
www.imageen.com