29-06-2013, 12:15 PM
BLURRED IMAGE RESTORATION: A FAST METHOD OF FINDING THE MOTION LENGTH AND ANGLE
BLURRED IMAGE RESTORATION.pptx (Size: 2.13 MB / Downloads: 31)
INTRODUCTION
Image restoration
Motion blur in image
Point Spread Function
Deburring by Lucy Richardson Algorithm
Gradient function
Which is a directional change in the intensity
Used to extract information from images
The gradient of an image f (x, y) is defined as a vector of partial derivatives
process of deblurring
Computing the gradient of the original image
obtaining the image gradient
obtaining the power spectrum of the image gradient in frequency domain
Filtering the power spectrum of the image gradient to obtain an identifiable regular pattern
Identifying parallel stripes (or lines) within the pattern
computing the direction of the stripes by means of the Radon transform
Blur estimation parameter
target function
carries information about the distance between stripes in the gradient power spectrum which is related to the blur length