Convert color tiff image to bitonal(b/w) and 8 bit grayscale image in ASP.Net

Hi Team ,

I have tif images where i want to set them below property from code.

1. Bit Depth = 8
2. Compression to CCITT T.6
3. Grayscale

Please help me on this.

I have referred below link but it works for only jpeg/png images.

Convert Color Image Into Gray Scale Image In ASP .NET

Generate image file with low bit depths