Hiiii...I found trouble in dividing the image into different scale space and smoothing it by gaussian filter

I want to apply SIFT algorithm in image for the detection of forgery but i m not able how to code the gaussian function in different scale space....plz help me

[Image Analyst]

Why not use SURF? It's faster and it's included in the Computer Vision System Toolbox.

[Parul Mishra]

how to perform matching in single image using SURF

[Anand]

Please clarify...

Answer 1

[Anand]

If you don't have the Computer Vision System Toolbox and want to compute the scale space, why don't you just do the smoothing yourself.

For each sigma corresponding to a different scale, you can convolve the image with a gaussian filter using the imfilter function.

im_sigma = imfilter(im,fspecial('gaussian',hsize,sigma));