How can I find the value of a blury image Matlab question

Question

Is there a method to detect the value of a image rgb that is blury?

I simply want to store the blury value of my image in a variable called blury value? Is there a dedicated function?

%image1 which is rgb is stored in variable img1

img1 = imread('102.jpg');

% conversion to grayscale stored in img1_grey variable

img1_grey = rgb2gray(img1);

blury_value = function_matlab(img1)

So is a value that indicates me how blur is my image.

If my image is very blur he must have a value higher.

So I search a method to store the value that indicates how my rgb image is blur so the value that indicates the level of my blur image.

I found an article here that use edge detection and the level of the degree of my image if it's blured or not.

Also it says that I must use HWT algorithm. I searched on google blur detection for digital images using using wavelet transform and it's the first pdf.

Answer 1

You have to define some metric of blurriness. Coding it in Matlab once it's been defined should be the easy part.

Answer 2

Here is the link with project.

http://www.mediafire.com/?qnzwnw3wjom

Here is the link I read about:

http://www.ceremade.dauphine.fr/~peyre/numerical-tour/tours/introduction_fourier_wavelets/

It's last example instead of lena.jpg I have photo_grey.jpg.

Exercice 5: (the solution is exo5.m) Perform non-linear approximation with M=n^2/16 wavelet coefficients by keeping M best coefficients.

exo5;

If someone can modify and help me I would be grateful. I need the contents of that function perform_wavelet_transf.