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JPEG chrmoinance subsampling

Beau · 2009-05-17 23:50:38

Hey, I've an exam tomorrow and pretty sure this question is coming up, its how to calculate the number of bytes used to store an image using different colour models. If someone could help me it'd be great. I've looked at notes and the book and I just don't get it. The question is: Suppose you have an 8x8 block of pixels…

17-05-2009 11:50pm

#1

Beau

Registered Users, Registered Users 2 Posts: 1,095 ✭✭✭

Join Date: December 2004

Posts: 999

Hey, I've an exam tomorrow and pretty sure this question is coming up, its how to calculate the number of bytes used to store an image using different colour models. If someone could help me it'd be great. I've looked at notes and the book and I just don't get it. The question is:

Suppose you have an 8x8 block of pixels that you are going to
compress using the JPEG method. They are currently
represented as 24-bit RGB color, with eight bits per color
component. Calculate the number of bytes necessary to store
this image data in the RGB model and in the YUV model with
4:2:0 chrominance subsampling. Then calculate the
compression rate.

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