change the quantization level of data

Hi,

I want to change the quantization level of a data. The original data is acquired in 16 bit format. I want to encode it in 2 bit. How can I do this?

-saima

Answer 1

[Walter Roberson]

Divide the data by 2^14

[saima]

Thanks :)

[Image Analyst]

After that you have only 4 values, so might as well cast your data to uint8 and save a byte of space per element.

data2bits = uint8(data16bits / 2^14);

and you do realize that it's still an 8 bit variable even though it has only 2 bits of information in it, don't you?

[Walter Roberson]

Watch out for rounding -- you need to decide whether you want it or do not want it. uint8() rounds as it converts.