Lena.bmp: 

This is an image of Lena.  Lena is the main image that most of our algorithm testing is performed on.  It has been a standard image to use for image processing for many decades.  This is the RGB Lena in bitmap format.  A 512 X 512 image of lena is about 768KB as a bitmap.

The image is broken up into its component parts by reading in the RGB values from the bitmap (since it is bitmap it is actually in BGR order) and then performing the following transformations (using greyscale images).

Cr = R - G
Cb = B - G
Y = G + (Cr + Cb)/2

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LenaY.bmp: 

This is the Y component. This is the luminance component.  Most of the image's energy is stored in this component so the Y component is very close to the image itself. 

 

 

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LenaCr.bmp: 

This is the Cr component. This is the first of the crominance components.  As you can see, there is less energy being stored in this component and so the image is less clear, especially in particular areas like the eyes.

 

 

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LenaCb.bmp: 

This is the Cb component.  It is the second crominance component.  This component does not have as much energy but as you can see, it is more detailed in some places than the Cr component, and less detailed in some places.

 

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