change the quantization level of data

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saima
saima 2013-8-29
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

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Walter Roberson
Walter Roberson 2013-8-29
Divide the data by 2^14
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Image Analyst
Image Analyst 2013-8-29
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
Walter Roberson 2013-8-30
Watch out for rounding -- you need to decide whether you want it or do not want it. uint8() rounds as it converts.

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