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Mean and Standard Deviation of an Image??

Hi,

Does anyone know what is meant by the mean and the standard deviation of an image??

What is the relationship between the mean and standard deviation of an image and its appearance??

Regards,
Guster
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Zeffer
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>>>Useful statistical features of an image are its arithmetic mean, standard deviation, and variance. These are well known mathematical constructs that, when applied to a digital image, can reveal important information.

The arithmetic mean is the image's average value.
The standard deviation is a measure of the frequency distribution, or range of pixel values, of an image. If an image is supposed to be uniform throughout, the standard deviation should be small. A small standard deviation indicates that the pixel intensities do not stray very far from the mean; a large value indicates a greater range.<<<

The relationship: ..the appearance of the image is related to the construction..and thus the quality.If this construction is revealed by the application of mathmatical constructs such as mean and standard deviation..the image can be enhanced or modified using this data.

see..
http://www-viz.tamu.edu/faculty/parke/ends489f00/notes/sec1_5.html
more at..
http://www.starlink.rl.ac.uk/star/docs/sun139.htx/node83.html


Z
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Guster

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That sounds good! The 'Accept comment as answer' button has disappeared for some reason so how do I accept it as the answer?

Guster
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Zeffer
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