Question

I noticed that Color struct from System.Drawing represents color in ARGB color space. So there are some questions:

• How to convert image beetween ARGB and YUV in c#? I found formulas describing RGB to YUV conversion. So what should I do with alpha channel?
• Are there free/trial libraries that support different color spaces? Or how do I implement it myself in the best manner?
• How do I represent ‘Bitmap’ as 2d array with ability to iterate over it? is Inheritance the only way to accomplish this?

That’s all yet)

Thanks!

Answer 1

You cannot directly convert argb to YUV (without loss) cause YUV contains no alpha information.

Depending on what you wanna do with the color after you have these possibilities:

• you just cut the alpha and discard the transparency

• you convert to a AYUV which contains
  also an alpha channel

conversion between color spaces

One possibility to convert a bitmap to a byte[] is to write it in a memorystream and read it bite wise.

MemoryStream stream = new MemoryStream();
bitmap.Save(stream, ImageFormat.Bmp);
byte[] data = stream.ToArray();